Patent application number | Description | Published |
20080212514 | COLLISION-FREE GROUP HOPPING IN A WIRELESS COMMUNICATION SYSTEM - Techniques for supporting data transmission with little or no control overhead are described. In an aspect, data may be sent based on a hybrid scheme that utilizes a combination of group hopping for transmissions of new packets and static grouping for retransmissions of pending packets. For the hybrid scheme, a user equipment (UE) may be assigned different resource blocks in different transmission intervals based on a hopping pattern. The first transmission of new packets may be sent on resource blocks determined based on the hopping pattern. Retransmissions of each packet, if any, may be sent on the resource block used for the first transmission of the packet. The UE may perform blind decoding to recover packets sent to the UE. In another aspect, semi-static group assignment may be used, and the UE may be assigned a group of resource blocks that may change periodically or based on trigger events. | 09-04-2008 |
20080212520 | METHOD AND APPARATUS FOR FREQUENCY HOPPING WITH FREQUENCY FRACTION REUSE - A method and apparatus for a wireless communication system, for frequency hopping using frequency fraction reuse scheme. The frequency hopping pattern is generated by dividing a portion of frequency into plurality of sub-bands, dividing a portion of time into plurality of sectors, each sector comprising the divided sub-bands, designating one of the divided sub-band within one of the sectors as the restricted sub-band, and allocating a location the designated sub-band as a restricted sub-band. | 09-04-2008 |
20080214198 | FLEXIBLE CHANNEL QUALITY INDICATOR REPORTING - System(s) and method(s) are provided that facilitate a flexible channel quality indicator (CQI) reporting directives or policies. A CQI reporting directive delivers an improved tradeoff between reporting accuracy and overhead by establishing subband-specific reporting periods, reporting repetitions, or power requirements. The CQI reporting directive is based at least in part on channel conditions, traffic requirements, and scheduling techniques. Automated optimization and negotiation of a CQI reporting directive based on communication performance is also incorporated. | 09-04-2008 |
20090257449 | METHODS OF RELIABLY SENDING CONTROL SIGNAL - Downlink PDCCH is communicated in a manner that mitigates a UE from decoding the PDCCH on multiple aggregation levels. Ambiguous payload sizes are identified and modified through zero padding with one or more bits based on the payload size. Aggregation level scrambling sequences can be generated such that a receiving UE can accurately identify the aggregation level on which to decode the PDCCH. Indicator bits that signal the aggregation level to a UE can also be included in the PDCCH. | 10-15-2009 |
20090268685 | ASSIGNMENT OF ACK RESOURCE IN A WIRELESS COMMUNICATION SYSTEM - Techniques for assigning acknowledgement (ACK) resource to a user equipment (UE) in a wireless communication system are described. In one design, a first parameter indicative of radio resources (e.g., the lowest index of at least one physical resource block) allocated to the UE for data transmission may be obtained. A second parameter indicative of another resource (e.g., a cyclic shift of a reference signal sequence) assigned to the UE for data transmission may also be obtained. The first and/or second parameter may be restricted, and each restricted parameter may be limited to a set of allowed values among all available values for the parameter. ACK resource assigned to the UE for data transmission may be determined based on the first and second parameters. In one design, sequential first parameter values may be mapped to sequential ACK resources indices. In another design, mirror mapping with different mapping directions may be used for different allowed values of the second parameter. | 10-29-2009 |
20090323957 | SCRAMBLING UNDER AN EXTENDED PHYSICAL-LAYER CELL IDENTITY SPACE - A method for wireless communications is provided. The method includes determining a set of physical layer cell identities and analyzing a current set of scrambling sequences. The method increases the current set of scrambling sequences to account for increases in the physical layer cell identities. | 12-31-2009 |
20090325585 | FLEXIBLE SIGNALING OF RESOURCES ON A CONTROL CHANNEL - Systems and methodologies are described that facilitate employing flexible signaling of resource block assignments on a control channel. Resource blocks associated with an uplink or downlink channel can be split into a plurality of groups, and group-specific signaling constraints can be utilized with each of these groups. For example, the group-specific signaling constraints can relate to minimum resource block allocation units, signaling structures (e.g., bitmap structure, contiguous allocation structure, tree-based structure, . . . ), and the like utilized for sending assignment indications that allocate resource blocks within the respective groups. Further, an access terminal can have a common understanding of the group-specific signaling constraints; thus, a received assignment indication can be deciphered by the access terminal by utilizing the group-specific signaling constraints. | 12-31-2009 |
20100027502 | Sub-band dependent resource management - A system and method for facilitating resource management in OFDM systems is provided. The system permits different and flexible resource cell metric operations levels (e.g. uplink load management, admission control, congestion control, signal handoff control) for different sub-bands. For the uplink load management, there are multiple distinct load operation points (e.g. IoT, RoT) per sub-band group instead of the same operation level across the entire available band. The sub-band groups encompass the entire band. The facilitation system also comprises a variety of transmitting protocols, command increment variable stepsize methods and robust command response methods. The system thus provides more flexible reverse link resource management and more efficient utilization of the bandwidth. | 02-04-2010 |
20100034161 | RNTI-DEPENDENT SCRAMBLING SEQUENCE INITIALIZATION - Systems and methodologies are described that facilitate initializing scrambling sequence generation in a wireless communication environment. Scrambling sequence generation can be initialized (e.g., at a start of each subframe, . . . ) at least in part as a function of a type of Radio Network Temporary Identifier (RNTI). Further, the type of RNTI utilized for initialization of scrambling sequence generation can correspond to a transmission type (e.g., whether the transmission is related to system information, paging, random access response, scheduled transmission or contention resolution message of a random access procedure, SPS traffic, regular unicast traffic, . . . ). Moreover, the scrambling sequence can be leveraged to scramble data for transmission over a data channel (e.g., Physical Downlink Shared Channel (PDSCH), Physical Uplink Shared Channel (PUSCH), . . . ). Further, a receiving wireless communication apparatus can utilize a descrambling sequence similarly yielded based upon the type of RNTI corresponding to the transmission type. | 02-11-2010 |
20100040009 | METHOD AND APPARATUS FOR UTILIZING UNUSED RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described that facilitate allocating uplink resources in a wireless access terminal. When a downlink transmission is received at a wireless device, the wireless device determines the appropriate control region to reserved based in part on the downlink transmission. Uplink data resources are also dynamically assigned. | 02-18-2010 |
20100041428 | METHOD AND APPARATUS FOR POWER CONTROL OF FIRST DATA TRANSMISSION IN RANDOM ACCESS PROCEDURE OF FDMA COMMUNICATION SYSTEM - Transmit power is controlled for a first uplink data transmission on Physical Uplink Shared Channel (PUSCH) during random access channel (RACH) procedure. Power control adjustment for the first PUSCH transmission is performed relative to the power spectral density used for successful PRACH transmission as adjusted for bandwidth difference, etc. The uplink Physical random access channel carries the RACH information that is transmitted by the user equipment (UE) during registrations or base station originated calls. A PRACH is composed of a number of preambles and a message portion. The preambles are a series of radio frequency power “steps” that increase in power according to the power step setting until the maximum number of preambles is reached or the base station acknowledges. Once the UE receives a positive indication, it transmits the message portion of the PRACH which consists of message data and control data with independent power gain control. | 02-18-2010 |
20100067470 | PHYSICAL RANDOM ACCESS CHANNEL (PRACH) TRANSMISSION IN MULTICARRIER OPERATION - Systems and methodologies are described that facilitate selecting an uplink carrier for random access within a wireless environment having multiple carriers. Selection of an uplink carrier for random access can be randomly selected from a set of available uplink carriers. Additionally, the uplink carrier for random access can be selected based upon which uplink carrier is paired with an anchor carrier. Further, the uplink carrier for random access can be identified based upon a bandwidth related to the user equipment (UE). Reference signals can also be employed in order to identify an uplink carrier to perform random access. | 03-18-2010 |
20100074209 | METHOD AND APPARATUS FOR CONTROLLING UE EMISSION IN A WIRELESS COMMUNICATION SYSTEM - Techniques for controlling the operation of user equipments (UEs) to mitigate emissions out of band are described. A base station may identify a UE potentially causing excessive emissions out of band due to transmission of control information and may schedule the UE to reduce the emissions out of band. In one design, the base station may schedule the UE to send control information on a Physical Uplink Shared Channel (PUSCH) instead of a Physical Uplink Control Channel (PUCCH). In another design, the base station may assign the UE with resources for the PUCCH to send control information. The assigned resources may be selected to mitigate the emissions out of band and may be (i) located within a target frequency range, (ii) located away from a frequency band to be mitigated with the emissions out of band, or (iii) obtained with a reuse scheme and have less inter-cell interference from other UEs. | 03-25-2010 |
20100085955 | TRANSMIT DIVERSITY FOR SC-FDMA - Techniques for transmitting data with transmit diversity for single-carrier frequency division multiple access (SC-FDMA) are described. In one design, a transmitter (e.g., a UE) may form a first symbol vector including first and second modulation symbol sequences. The transmitter may also form a second symbol vector including third and fourth modulation symbol sequences, which may be generated based on the second and first modulation symbol sequences, respectively. Each symbol vector may further include a cyclic prefix and possibly a cyclic postfix for each modulation symbol sequence. The transmitter may generate a first SC-FDMA symbol based on the first symbol vector and a second SC-FDMA symbol based on the second symbol vector. The transmitter may transmit the first and second SC-FDMA symbols from two transmit antennas in a single SC-FDMA symbol period to achieve transmit diversity. | 04-08-2010 |
20100172313 | SEMI-PERSISTENT SCHEDULING RESOURCE RELEASE WITH DRX COMMAND - Certain aspects of the present disclosure relate to a technique for releasing semi-persistent scheduling resources and for immediate entering an energy saving mode of operation at a user terminal. | 07-08-2010 |
20100177653 | METHOD AND APPARATUS FOR COMPUTING AND REPORTING CHANNEL QUALITY INDICATION (CQI) - Techniques for computing and reporting channel quality indication (CQI) are described. In an aspect, a plurality of CQI computation methods may be supported, and each CQI computation method may indicate how CQI should be computed. One CQI computation method may be selected for use. CQI may then be computed and reported in accordance with the selected CQI computation method. In an exemplary design, a user equipment (UE) may obtain a selected method for computing CQI, which may be chosen based on the UE capability and/or other factors. The selected method may specify (i) CQI computation for a specific codeword among a plurality of codewords or (ii) CQI computation by averaging signal quality across a plurality of layers used for transmission. The UE may compute CQI in accordance with the selected method, send the CQI to a base station, and receive data sent by the base station based on the CQI. | 07-15-2010 |
20100177700 | METHOD AND APPARATUS FOR ENABLING MULTIPLE TRANSMISSION MODES BASED ON MULTIPLE SEARCH SPACES - Certain aspects of the present disclosure relate to a technique for enabling multiple transmission modes based on control information of different formats. | 07-15-2010 |
20100177810 | METHOD AND APPARATUS FOR ENABLING MULTIPLE TRANSMISSION MODES IN A WIRELESS COMMUNICATION SYSTEM - Certain aspects of the present disclosure relate to a technique for enabling multiple transmission modes based on control information of different formats. | 07-15-2010 |
20100189032 | FREQUENCY HOPPING IN A WIRELESS COMMUNICATION NETWORK - Techniques for performing frequency hopping in a wireless network are described. In an aspect, frequency hopping may be performed based on both cell identity (ID) and system time information. In one design, a user equipment (UE) may determine a cell ID of a cell and may obtain system time information for the cell. The UE may determine resources to use for transmission with frequency hopping based on the cell ID and the system time information. In one design, the UE may initialize a PN generator in each radio frame with an initial value determined based on the cell ID and a system frame number (SFN) for the radio frame. The UE may determine the resources to use for transmission based on a hopping function, a mirroring function, and a PN sequence from the PN generator. The UE may send a transmission on the resources to the cell. | 07-29-2010 |
20100195629 | EFFICIENT ACK TRANSMISSION FOR UPLINK SEMI-PERSISTENT SCHEDULING RELEASE IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided in which an uplink semi-persistent scheduling release is received an HARQ ACK is determined whether to be transmitted in response to the received uplink semi-persistent scheduling release. | 08-05-2010 |
20100195759 | UPLINK OPEN-LOOP SPATIAL MULTIPLEXING IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate cycling through precoders for transmitting wireless network communications in a time domain. The precoders can be cycled according to a precoder sequence for each data symbol transmission. When the last precoder is selected the cycle can begin again, a new precoder sequence can be received or defined, and/or the like. A precoder sequence related to a subset of precoders present in a wireless device can be defined sequentially, cyclically shifted according to an identifier or one or more communications parameters, randomly, pseudo-randomly according to an identifier or one or more communications parameters, and/or the like. In addition, the precoder sequence can be utilized to select a precoder for one or more retransmissions. Such cycling of precoders can increase transmit diversity. | 08-05-2010 |
20100202559 | MULTIPLEXING AND CODING SCHEMES FOR MULTIPLE TRANSMIT ANTENNAS IN A WIRELESS COMMUNICATION SYSTEM - Techniques for transmitting data from multiple transmit antennas using space orthogonal resource transmit diversity (SORTD) are described. For the SORTD scheme, a different orthogonal resource may be assigned to each transmit antenna. Data may be sent from the multiple transmit antennas using multiple orthogonal resources. In one design, a UE may process at least one information bit (e.g., with joint or independent coding) to obtain first and second sets of at least one modulation symbol. The UE may process the first set of modulation symbol(s) for transmission from the first transmit antenna using a first orthogonal resource. The UE may process the second set of modulation symbol(s) for transmission from the second transmit antenna using a second orthogonal resource. Each orthogonal resource may include a different reference signal sequence or a different set of reference signal sequence and orthogonal sequence. | 08-12-2010 |
20100214938 | FLEXIBLE DATA AND CONTROL MULTIPLEXING - Systems and methods are disclosed for control-data multiplexing as well as control-data decoupling. In one embodiment, a semi-static approach is disclosed, wherein the upper layer(s) are configured such that each user equipment uses either control-data multiplexing or control-data decoupling. Additionally or alternatively, a dynamic approach is disclosed, in which one bit is added to the DCI format which indicates whether the UE is using control-data multiplexing or control-data coupling. | 08-26-2010 |
20100215007 | CHANNEL INTERLEAVER FOR TRANSMISSION OF MULTIPLE CODE BLOCKS IN A WIRELESS COMMUNICATION SYSTEM - Techniques for performing channel interleaving to achieve similar SINRs for multiple code blocks are described. In one design, a transmitter station (e.g., a base station or a UE) determines a plurality of resource groups assigned for data transmission. Each resource group includes a plurality of resource elements formed by a cluster of subcarriers in a time interval. The transmitter station partitions a transport block into a plurality of code blocks, processes each code block to obtain data symbols for that code block, and maps the data symbols for each code block to at least one resource element in each of the plurality of resource groups. The transmitter station transmits the mapped data symbols for the plurality of code blocks to a receiver station. In one design, the transmitter station receives an ACK or a NACK for the transport block and retransmits all code blocks if a NACK is received. | 08-26-2010 |
20100232524 | METHOD AND APPARATUS FOR SYSTEM BANDWIDTH INDICATION - Techniques for conveying system bandwidths in a wireless communication system are described. In an aspect, system bandwidth information may be signaled to first user equipments (UEs) supporting a first set of system bandwidths and second UEs supporting a second set of system bandwidths. In one design, a base station may obtain and broadcast system bandwidth information indicating a first system bandwidth for the first UEs and a second system bandwidth for the second UEs. The first system bandwidth may be selected from the first set, and the second system bandwidth may be selected from the second set, which may be a superset of the first set. The system bandwidth information may include a first part and a second part. The first part may convey the first system bandwidth for the first UEs. The first and second parts may convey the second system bandwidth for the second UEs. | 09-16-2010 |
20100238823 | METHOD AND APPARATUS FOR HANDLING INCONSISTENT CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Techniques for handling inconsistent control information in a wireless communication system are described. In an aspect, inconsistent control information is handled in different manners for the downlink and uplink. In one design, a user equipment (UE) receives a first grant with first control information for a first data transmission and also receives a second grant with second control information for a second data transmission. The UE determines that the second control information is inconsistent with the first control information, e.g., due to the two grants conveying different transport block sizes. The UE determines whether to retain or discard the second grant based on whether the two grants are for data transmissions on the downlink or uplink. In one design, the UE retains the second grant if the two grants are for data transmissions on the downlink and discards the second grant if the two grants are for data transmissions on the uplink. | 09-23-2010 |
20100246721 | METHOD AND APPARATUS FOR EFFICIENT CONTROL DECODING FOR TRANSPARENT RELAYING OPERATION IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate efficient control decoding to facilitate management of cooperative relay operation in a wireless communication environment. As described herein, a relay node (RN) and/or another entity cooperating with a serving network node for respective users in a potentially assisted group can prune a search space of control decoding candidates corresponding to the respective users. For example, respective control decoding candidates corresponding to, e.g., common and/or user-specific search spaces, aggregation levels, control channel sizes, etc., can be eliminated from a reduced control search space based on various criteria. Further, sets of control decoding candidates corresponding to respective users not schedulable at a given time interval can be eliminated. In addition, control search space pruning can be performed in addition to or in place of increased cyclic redundancy check (CRC) protection for control information, thereby further decreasing the probability of false control detection. | 09-30-2010 |
20100296389 | FAILURE INDICATION FOR ONE OR MORE CARRIERS IN A MULTI-CARRIER COMMUNICATION ENVIRONMENT - Systems and methodologies are described that facilitate indicating a loss of channel quality on a component carrier of a plurality of component carriers. A UE can monitor configured component carriers to determine channel qualities associated therewith. The UE can transmit carrier quality information that includes the channel qualities of the plurality of component carriers. In addition, the UE can identify a component carrier experiencing a loss of channel quality and notify a base station of the component carrier with poor channel conditions. In one aspect, the UE can incorporate additional information into a scheduling request. In addition, the UE can generate a CQI report that contains the carrier quality information. Further, the base station, when a loss of channel quality occurs, can retry transmission on different carriers. Moreover, the base station can employ information provided by the UE when selecting a component carrier for a transmission. | 11-25-2010 |
20100322154 | CONTROL CHANNEL DESIGN FOR DYNAMIC SUB-FRAME SELECTION - Certain aspects of the disclosure relate to providing detailed control channel design for a dynamic selection scheme between normal subframes and special subframes. In one aspect, a method may be provided for generating a subframe that comprises a data region and at least one control region interpretable by a first group of one or more legacy User Equipments (UEs) as a first type and by a second group of non-legacy UEs as a second type, wherein the second group of UEs supports a plurality of features that are a superset of a plurality of features supported by the first group and transmitting the subframe to the first group and the second group of UEs. | 12-23-2010 |
20100323745 | METHOD AND APPARATUS FOR MANAGING DOWNLINK TRANSMISSION POWER IN A HETEROGENEOUS NETWORK - A method, an apparatus, and a computer program product for wireless communication are provided in which it is determined that a transmission of a first instance of control information in a first control region in a subframe of a first power class eNodeB a non-modified power spectral density (PSD) will result in interference above a threshold with a transmission of a second instance of control information in a second control region in a subframe of a second power class eNodeB, PSD is modified for a portion of at least one of the first or second control regions of at least one of the subframes for at least one of the first power class or second power class eNodeB, and the first instance of control information is transmitted during the control region using the modified PSD for the portion of the first instance of control information. | 12-23-2010 |
20110021191 | CROSS-CARRIER CONTROL FOR LTE-ADVANCED MULTICARRIER SYSTEM - Systems and methodologies are described that facilitates identifying control information for two or more carriers in a multi-carrier system or environment. User equipment (UE) identifications (IDs) can be assigned for a user equipment, wherein each user equipment (UE) identification (ID) can correspond to a specific carrier. Upon receipt of control information related to a plurality of carriers from an anchor carrier, the user equipment (UE) identifications (IDs) can be utilized in order to identify which control information corresponds to each carrier. The user equipment (UE) identification (ID) can be, for example, a Cell Random Network Temporary Identity (C-RNTI). | 01-27-2011 |
20110039499 | DYNAMIC SELECTION OF RANDOM ACCESS CHANNEL CONFIGURATIONS - Systems and methodologies are described that facilitate dynamic selection of a random access channel configuration. Typically, a single random access channel configuration is utilized throughout a cell; however, the configuration employed, while appropriate for some mobile devices within the cell, can introduce unnecessary overhead for other mobile devices. A mobile device can measure a characteristic of a radio link between the mobile device and a base station. The measurement can be compared to a set of thresholds provided by the base station. Based upon the comparison, a random access channel configuration can be selected from a set of formats. The selected configuration can be utilized to initiate random access procedures. | 02-17-2011 |
20110070845 | MULTIPLE CARRIER INDICATION AND DOWNLINK CONTROL INFORMATION INTERACTION - Methods, systems, apparatus and computer program products are provided to facilitate the configuration and allocation of cross-carrier control information associated with transmissions of a wireless communication system. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims. | 03-24-2011 |
20110076962 | CONTROL INFORMATION SIGNALING - Methods, systems, apparatus and computer program products are provided to facilitate the configuration and allocation of control information associated with transmissions of a wireless communication system. In systems that utilize multiple component carriers, cross-carrier signaling may be used to carry the control information associated with one component carrier on a different component carrier. By allowing control information messages to share their allocated search spaces, the number of decoding attempts needed to obtain control information can be kept within desirable limits while improving scheduling and resource allocation flexibility. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims. | 03-31-2011 |
20110077038 | SCRAMBLING SEQUENCE INITIALIZATION FOR COORDINATED MULTI-POINT TRANSMISSIONS - Methods, systems, apparatus and computer program products are provided for generating a shared initialization code for physical channel data scrambling in an LTE Advanced coordinated multipoint transmission network. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims. | 03-31-2011 |
20110085457 | METHOD AND APPARATUS FOR SUPPORTING USER EQUIPMENTS ON DIFFERENT SYSTEM BANDWIDTHS - Techniques for supporting communication for different user equipments (UEs) on different system bandwidths are described. In one design, a base station transmits first control information to support communication for at least one first UE on a first system bandwidth and transmits second control information to support communication for at least one second UE on a second system bandwidth, which overlaps the first system bandwidth. The base station transmits data to the first and second UEs on the first and second system bandwidths, respectively. In one design, the base station receives third control information from the first UE(s) and fourth control information from the second UE(s) on a third system bandwidth. The base station receives data from the first UE(s) on the third system bandwidth and receives data from the second UE(s) on a fourth system bandwidth, which overlaps the third system bandwidth. | 04-14-2011 |
20110085458 | DOWNLINK CONTROL INFORMATION FOR EFFICIENT DECODING - Certain aspects of the present disclosure present techniques for generating a downlink control information (DCI) message which may be transmitted with a particular organization of a downlink control channel and techniques for receiving the same. The DCI message may support uplink enhancements such as single-user multiple input multiple output (SU-MIMO) and clustered DFT-S-OFDM, and may limit blind decoding operations at a user equipment. | 04-14-2011 |
20110085513 | UPLINK RESOURCE ALLOCATION FOR LTE ADVANCED - Methods, systems, apparatus and computer program products are provided to receive downlink control information (DCI) in a downlink control channel, where the downlink control information configured to indicate an allocation of uplink resources with a clustered uplink resource allocation protocol or a contiguous uplink resource allocation protocol, to detect which of the clustered uplink resource allocation protocol and the contiguous uplink resource allocation protocol is indicated and to allocate the uplink resources based on the indicated uplink resource allocation protocol. | 04-14-2011 |
20110090808 | METHODS AND APPARATUS FOR TRANSPORT BLOCK SIZE DETERMINATION - Methods and apparatus for determining transport block sizes for relaying backhaul subframes from a relay node to a donor base station are described. A transport block size may be adjusted at a relay node by an adjustment factor. The adjustment factor may be based on parameters such as propagation delay between the relay node and donor base station, a multiplexing configuration of control and data information in a relay node subframe, a switching time in a relay node subframe between a downlink and an uplink partition of the subframe, and/or other channel or configuration characteristics. | 04-21-2011 |
20110090809 | SYSTEM AND METHOD FOR ALLOCATING RESOURCES IN AN EXTENDED BANDWIDTH WIRELESS NETWORK - A method, an apparatus, and a computer program product for wireless communication are disclosed in which a base station provides an extended bandwidth having an extension portion and a non-extension portion. The base station can indicate for a particular user equipment (UE) to utilize only a portion of the extended bandwidth. In this way, the extended bandwidth can include multiplexed resources directed to a plurality of UEs, improving capacity and/or throughput. Moreover, backwards compatibility with devices compatible with LTE Release 8 can be achieved, as those devices can be directed to utilize only the non-extension portion of the extended bandwidth. In one aspect, the base station indicates a system bandwidth including resource blocks associated with the non-extension portion and resource blocks associated with the extension portion, and the UE is not required to monitor more than a predetermined number of resource blocks to receive a downlink transmission. | 04-21-2011 |
20110090854 | DOWNLINK AND UPLINK RESOURCE ELEMENT MAPPING FOR CARRIER EXTENSION - A method, an apparatus, and a computer program product for wireless communication are provided in which resource elements compatible with multiple different communication protocols, which may not be compatible with one another, may be mapped to a radio frame. For example, in an LTE network, equipment configured to be compatible with 3GPP release 8 standards (herein referred to as Rel. 8) may have certain limitations as to what bandwidth is available for use and access, while these limitations may not apply to later releases of LTE standards after Rel. 8 (herein referred to as “New”). Thus, a system bandwidth can be extended to include an extension portion, to which resource elements compatible with the New protocol may be mapped, and a non-extension portion, to which resource elements compatible with either Rel. 8 or the New protocol may be mapped, providing an effective multiplexing of system resources. | 04-21-2011 |
20110092219 | UPLINK MULTI-POWER AMPLIFIER/ANTENNA OPERATION AND CHANNEL PRIORITIZATION - Certain aspects of the present disclosure relate to techniques for controlling transmission power and prioritizing transmission carriers. A method of power distribution for different physical layer channels over one or more carriers in case of power limited user equipment (UE) is proposed. Operation modes of the UE with single and multiple power amplifiers/antennas can be supported. | 04-21-2011 |
20110098054 | SOUNDING REFERENCE SIGNAL FOR COORDINATED MULTI-POINT OPERATION - Systems and methodologies are described that facilitate configuring a sounding reference signal transmission in a wireless communication environment. A UE can employ coordinated multi-point transmission and/or reception such that multiple cells collaborate to transmit data to the UE and/or receive data from the UE. To support the coordinated multi-point transmission and/or reception, the UE can transmit a sounding reference signal that is configured to enable reliable reception of the sounding reference signal by members of a cooperating set. In addition, configuration of the sounding reference signal can be coordinated to enable more efficient transmission and utilization of the sounding reference signal. Configuration of the sounding reference signal can be based upon information exchanged between the multiple cells. Moreover, the multiple cells can coordinate to set and control a transmit power of the sounding reference signal. | 04-28-2011 |
20110103247 | CHANNEL STATUS REPORTING - Methods, systems, apparatus and computer program products are provided to facilitate the transmission of channel status information in wireless systems, such as advanced long-term evolution (LTE-A) systems. Requests for aperiodic channel status reports are generated in systems that use multiple carriers and operate in multiple-in-multiple-out (MIMO) configurations. The request enables a user equipment to configure two transport blocks for the transmission of channel status information only. In some instances, data, in addition to channel status information, is transmitted by the user equipment. | 05-05-2011 |
20110103286 | MBSFN SUBFRAME GENERATION AND PROCESSING FOR UNICAST - Certain aspects of the present disclosure propose methods and apparatus for utilizing unused Multimedia Broadcast over a Single Frequency Network (MBSFN) subframes for unicast transmissions. The proposed methods include efficient cyclic prefix (CP) and MBSFN frame structure design, and an optimized subframe/carrier bundling window design for hybrid automatic repeat request (HARQ) feedback in presence of the MBSFN subframes. | 05-05-2011 |
20110103295 | APPARATUS AND METHOD FOR PROVIDING RELAY BACKHAUL COMMUNICATIONS IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for designing a relay backhaul channel in a wireless communication system are provided. At least one relay node utilized for communication with respective user devices and at least one relay backhaul channel for conducting in-band half-duplex communication with the at least one relay node are identified. The relay backhaul channel may be an FDM channel, a TDM/FDM channel, or a joint R-PDCCH/R-PDSCH channel. The relay channel is used for communicating with the at least one relay node. The supportable ranks of the R-PDSCH channel may depend on the number of resources reserved for demodulation reference signals in the R-PDCCH region. | 05-05-2011 |
20110103296 | TDM-FDM RELAY BACKHAUL CHANNEL FOR LTE ADVANCED - Methods, apparatus and computer program products are provided for receiving a first group of resource blocks, frequency multiplexed in a transmission subframe, where the first group of resource blocks spans less than a full transmission bandwidth and includes a UE control channel in a first time interval, a relay control channel and a first quantity of dedicated reference symbols in a second time interval, and a shared data channel and a second quantity of dedicated reference symbols in a third time interval. | 05-05-2011 |
20110103330 | SPECTRUM INTERPRETATION IN A HETEROGENOUS NETWORK - Certain aspects of the present disclosure provide for the application of extension carriers and carrier segments in the context of heterogeneous networks. As described herein, different parts of the spectrum may be interpreted differently by different type of nodes. | 05-05-2011 |
20110103498 | METHOD AND APPARATUS FOR CONTROL AND DATA MULTIPLEXING IN A MIMO COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate control and data multiplexing for uplink (UL) multiple-input-multiple-output (MIMO) communication within a wireless communication system. As described herein, a device conducting uplink MIMO communication in a wireless communication system can multiplex control signaling and data across one or more of a plurality of layers (e.g., corresponding to spatial layers, codewords, etc.) associated with an uplink transmission. Techniques are described herein for selecting layers of a transmission on which to schedule control signaling and selecting offsets to apply to the control signaling scheduled on selected layers. Further, techniques are described herein for leveraging a multi-layer transmission to increase the efficiency of acknowledgement communication. In addition, techniques are described for selecting a modulation and coding scheme (MCS) to apply to control signaling that is combined with data in an uplink multi-layer transmission. | 05-05-2011 |
20110103509 | DOWNLINK CONTROL TRANSMISSION IN MULTICARRIER OPERATION - A wireless communication network distributes resources for a Physical Downlink Control CHannel (PDCCH) over multiple carriers in accordance with a constraint that limits a number of blind decoding actions required by user equipment (UE). Distribution can entail segregating UE-specific and common search spaces to different monitored carriers. Distribution can entail segregating aggregation levels to different monitored carriers. Distribution can entail segregating a number of decoding candidates for a given aggregation level to different monitored carriers. The distribution can be orthogonal or non-orthogonal, and can be UE-based or per cell-based. The distribution can be static, semi-static or hop with time. | 05-05-2011 |
20110103510 | RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding. | 05-05-2011 |
20110105050 | CROSS-CARRIER/CROSS-SUBFRAME INDICATION IN A MULTI-CARRIER WIRELESS NETWORK - Techniques for cross-subframe and cross-carrier scheduling of uplink and downlink transmissions in a multi-carrier wireless communication system are disclosed. A base station can include cross-subframe, carrier indication (xSF/CIF) information in a PDCCH message to signal to a user equipment (UE) which subframes and/or component carriers pertain to control information carried therein. The UE may utilize the xSF/CIF information to determine to which subframes and/or component carriers the control information is to be applied. | 05-05-2011 |
20110105059 | UPLINK POWER CONTROL FOR WIRELESS COMMUNICATION - Certain aspects of the present disclosure provide closed loop and open loop power control techniques for each antenna of the user equipment (UE). The access point may measure the received signals from each antenna of the user equipment, calculate a power adjustment parameter for each antenna of the UE, and transmit the parameters to the UE. The UE may use the adjustment parameters to determine the transmit power value for each antenna. In addition, the UE may measure the path loss for each antenna and update the transmit power per antenna based on the path loss and other parameters. | 05-05-2011 |
20110105137 | RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding. | 05-05-2011 |
20110110315 | FALSE DETECTION REDUCTION DURING MULTI-CARRIER OPERATION - Systems and methodologies are described that facilitate reducing false detections of control channels during blind decode when multiple component carriers are configured. A UE can perform blind detection of control channels on a plurality of carriers, wherein each control channel detected can be validated to reduce false detections. In one aspect, a reference carrier can be selected, wherein one or more detected control channels are validated so long as one detected control channel is on the reference carrier. In another aspect, control channel can be bundled such that multiple control channel detections are required for validation. Moreover, dummy control channels can be introduced that provide UE with guidance during blind decoding, as well as provide validation of detections. Further, various combinations of a reference carrier, bundling, and/or a dummy control channel can be utilized. | 05-12-2011 |
20110110316 | PDCCH SEARCH SPACE DESIGN FOR LTE-A MULTI-CARRIER OPERATION - A method, an apparatus, and a computer program product are provided in which a configuration for utilizing a plurality of carriers is received. In addition, a set of PDCCH candidates on a carrier of the plurality of carriers are determined for obtaining DCI for at least one carrier of the plurality of carriers. The number of PDCCH candidates is a function of a number of carriers of the at least one carrier. | 05-12-2011 |
20110110398 | METHOD AND APPARATUS FOR INTERACTION OF CELL-SPECIFIC AND USER-EQUIPMENT-SPECIFIC SOUNDING REFERENCE SIGNAL PERIODICITY AND OFFSET - Certain aspects of the present disclosure relate to a technique for enabling transmission of sounding reference signals for uplink and downlink scheduling. | 05-12-2011 |
20110110441 | JOINT LAYER 3 SIGNALLING CODING FOR MULTICARRIER OPERATION - Systems and methodologies are described that facilitate encoding layer 3 control information in a multicarrier wireless communication environment. The layer 3 control information can be jointly encoded for a plurality of component carriers. Further, the jointly encoded layer 3 control information for the plurality of component carriers can be included in a data transmission (e.g., PDSCH, PUSCH, . . . ) sent on a component carrier from the plurality of component carriers. Moreover, an allocation for the data transmission on the component carrier can be indicated by a control transmission (e.g., PDCCH, . . . ). For example, the control transmission and the data transmission, which can be scheduled by the control transmission, can be sent on a common component carrier or different component carriers from the plurality of component carriers (e.g., same carrier signalling or cross-carrier signalling can be implemented, . . . ). | 05-12-2011 |
20110110455 | RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding. | 05-12-2011 |
20110111781 | REFERENCE SIGNALING FOR A HIGH-MOBILITY WIRELESS COMMUNICATION DEVICE - A base station for enabling communication with a high-mobility wireless communication device is described. The base station includes a processor and instructions stored in memory. The base station identifies a high-mobility wireless communication device and sends a reference signal configuration. The base station also allocates an additional specific reference signal and sends the additional specific reference signal to the high-mobility wireless communication device. | 05-12-2011 |
20110116437 | SUBFRAME DEPENDENT TRANSMISSION MODE IN LTE-ADVANCED - A method of wireless communication includes communicating in a plurality of subframes. The subframes include a first type of subframe and a second type of subframe. The method further includes utilizing a transmission mode for each of the subframes based on the type of each of the subframes. A second method of wireless communication includes communicating in a plurality of subframes. The subframes include a first type of subframe and a second type of subframe. The second method further includes configuring a UE with a transmission mode for each of the subframes based on the type of each of the subframes. | 05-19-2011 |
20110116454 | SEMI-PERSISTENT SCHEDULING FOR MULTI-CARRIER WIRELESS COMMUNICATION - Certain embodiments of the present disclosure present methods for semi-persistent scheduling (SPS) for multi-carrier wireless communications systems. The proposed methods support activation and release of one or more SPS services in any subframe for a given user configured with a plurality of carriers. | 05-19-2011 |
20110116456 | METHOD AND APPARATUS FOR FACILITATING RELIABLE TRANSMISSION OF A CONTROL REGION SIZE AND DETECTION OF CROSS-CARRIER SIGNALING - Methods, apparatuses, and computer program products are disclosed for facilitating indicating and detecting control region sizes. A multi-carrier communication between a wireless terminal and a base station is facilitated by a first carrier having a first control region size and a second carrier having a second control region size. Embodiments are disclosed in which control region sizes are ascertained from a control signal, wherein the control is generated by either scrambling an aspect of the control signal based on the second control region size, or relating the second control region size with the first control region size. Other disclosed embodiments for ascertaining control region sizes include a reverse interleaver embodiment, wherein a set of modulation symbols is mapped beginning from a last data symbol and ending with a first available data symbol. | 05-19-2011 |
20110116457 | MULTICARRIER RETRANSMISSION FEEDBACK - Systems and methodologies are described that facilitate indicating feedback parameters for multiple single carrier assignments, multicarrier assignments, and/or the like according to single carrier-frequency division multiple access (SC-FDMA), relaxed SC-FDMA, etc. Feedback in relaxed SC-FDMA can be bundled by a mobile device to conserve power. In addition, a downlink assignment indicator (DAI) can be utilized to detect and indicate lost grants. | 05-19-2011 |
20110128922 | DOWNLINK ASSIGNMENT INDICATOR DESIGN FOR MULTI-CARRIER WIRELESS COMMUNICATION - Systems and methodologies are described herein that facilitate various techniques for enhanced downlink assignment index (DAI) signaling in a multi-carrier wireless communication system. As described herein, DAI and/or other indicator signaling transmitted on a first carrier can be configured to carry information relating to a number of downlink transmission assignments applied to at least a second carrier, which in some cases can be disparate from the first carrier. To these ends, described herein are techniques for cross-carrier DAI signaling, multiple DAI signaling, aggregate DAI signaling, and other similar techniques. As additionally described herein, DAI signaling can be related to downlink control transmissions and/or downlink data transmissions in connection with respective techniques that can be applied to the DAI signaling. | 06-02-2011 |
20110128933 | METHOD AND APPARATUS THAT FACILITATES OPERATING A RELAY VIA A MULTIMEDIA BROADCAST SINGLE FREQUENCY NETWORK BASED BACKHAUL LINK - Aspects are disclosed for operating a relay via an MBSFN-based backhaul link. Control resources are allocated, which include a first set of control resources and a second set of control resources. For some embodiments, a portion of the first set of control resources is concatenated with a portion of the second set of control resources to form a concatenation of resources whereas, in other embodiments, an indication scheme is implemented to provide an indication of a first or second allocation size respectively associated with the first and second set of control resources. At least one control signal is then transmitted which includes at least one of the concatenation or the indication. Other disclosed embodiments are directed towards configuring a user equipment to decode a control signal generated according to the aspects disclosed herein. | 06-02-2011 |
20110134771 | JOINT PARAMETER DETERMINATION AND SEPARATE CQI GENERATION REPORTING FOR LTE-A MULTICARRIER - Certain aspects of the present disclosure relate to a method for determining and reporting channel information feedback for multi-carrier operation. In one aspect, channel information feedback parameters may be determined jointly across component carriers, and channel information feedback reports may be generated and reported individually per component carrier. | 06-09-2011 |
20110141926 | METHOD AND APPARATUS FOR DISPATCHING A CHANNEL QUALITY INDICATOR FEEDBACK IN MULTICARRIER SYSTEM - In accordance with one or more aspects and corresponding disclosure thereof, various aspects are described in connection with channel quality indicator (CQI) feedback in connection with one or more downlink carriers. An anchor carrier scheme is employed to provide channel quality indicator (CQI) feedback of one or more downlink carriers. An indication is set to identify that a designated uplink carrier is used to convey the CQI feedback. An uplink carrier is selected from a set of uplink carriers as an anchor carrier to convey the CQI feedback. CQI feedback is transmitted for one or more downlink carriers using the designated carrier. | 06-16-2011 |
20110141959 | DATA PRIORITIZATION FOR A POWER-LIMITED UE IN A WIRELESS COMMUNICATION SYSTEM - Techniques for transmitting data by a power-limited user equipment (UE) in a wireless communication system are described. The UE may transmit data of different types on one or more carriers and may be power limited. In some aspects, the UE may prioritize the data to transmit based on the priorities of the different data types, the priorities of carriers on which the data is transmitted, and/or other criteria. In one design, the UE may obtain data to transmit on at least one carrier for the uplink. The UE may determine that it is power limited for transmission on the at least one carrier. The UE may prioritize the data to transmit based on at least one criterion. The UE may allocate its available transmit power to the prioritized data and may transmit the prioritized data at the allocated transmit power. | 06-16-2011 |
20110141982 | TRANSMISSION OF REFERENCE SIGNAL ON NON-CONTIGUOUS CLUSTERS OF RESOURCES - Techniques for transmitting a reference signal on multiple non-contiguous clusters of resources are described. A user equipment (UE) may be scheduled for data transmission on the multiple non-contiguous clusters, and each cluster may cover a set of contiguous subcarriers. The UE may generate the reference signal based on at least one reference signal (RS) sequence using code division multiplexing (CDM) or frequency division multiplexing (FDM). In an design, the UE generates the reference signal with CDM based on a single RS sequence having a length matching the total length of the multiple non-contiguous clusters. In another design, the UE generates the reference signal with CDM based on one RS sequence for each cluster. In yet another design, the UE generates the reference signal with FDM and transmits the reference signal on a subset of all subcarriers for the multiple non-contiguous clusters. | 06-16-2011 |
20110143675 | METHOD AND APPARATUS FOR FACILITATING RADIO LINK MONITORING AND RECOVERY - Methods, apparatuses, and computer program products are disclosed for facilitating a radio link failure determination. A wireless terminal is configured to monitor a control channel quality of a control signal over at least one control carrier. A radio link failure determination is then made based on the control channel quality of the at least one control carrier. In other embodiments, rather than basing the radio link failure determination solely on the set of control carriers, the wireless terminal is configured to monitor a control channel quality over at least one additional carrier, not included in the set of control carriers, in response to a link loss detected over each of the set of control carriers. For such embodiments, the radio link failure determination is then made based on the control channel quality of the additional carrier(s). | 06-16-2011 |
20110149774 | APPARATUS AND METHOD FOR TRANSMIT-RESPONSE TIMING FOR RELAY OPERATION IN WIRELESS COMMUNICATIONS - An apparatus and method for relay operation in a wireless communication system comprising determining a first set of subframes for downlink communication from an eNB to a relay node; determining a second set of subframes for uplink communication from the relay node to the eNB; determining a downlink (DL) hybrid automatic repeat request (HARQ) timing between a first control transmission and a HARQ acknowledge (ACK) message based on a first minimum delay and the first and the second sets of subframes; and determining an uplink (UL) hybrid automatic repeat request (HARQ) timing between a second control transmission and an uplink transmission based on a second minimum delay and the first and the second sets of subframes. | 06-23-2011 |
20110149894 | PROTECTION OF BROADCAST SIGNALS IN HETEROGENEOUS NETWORKS - Certain aspects of the disclosure provide for the protection of broadcast signals in heterogeneous networks. As described herein, a first set of resources used for downlink transmission in a first cell may overlap with a second set of resources used for broadcast signals in a second cell. The broadcast signals may be protected by allocating a third set of resources for the downlink transmission in the first cell, wherein the third set of resources is based, at least in part, on the overlapping set of resources. | 06-23-2011 |
20110158351 | METHOD AND APPARATUS FOR COMMUNICATING ANTENNA PORT ASSIGNMENTS - A method, an apparatus, and a computer program product for wireless communication are provided in which downlink control information (DCI) including a total number of available antenna ports, a rank indicator for a user equipment (UE), and one or more port assignment bits is received, a subset of the total number of available antenna ports that are assigned to the UE based on at least one of: the rank indicator or the one or more port assignment bits is determined, and demodulation based on reference signals corresponding to the set of assigned antenna ports is performed. | 06-30-2011 |
20110159914 | Interaction Between Accumulative Power Control And Minimum/Maximum Transmit Power In LTE Systems - Methods and apparatus in a wireless communication system are described for receiving and processing transmit power control commands, where, for example, the response to the transmit power control commands is conditionally decoupled from at least one of a transmit bandwidth parameter, a transport format parameter and a power stepsize limit. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims. | 06-30-2011 |
20110164550 | Downlink Control Channel for Relay Resource Allocation - Certain aspects of the present disclosure provide a method for wireless communications. The method generally includes allocating resources of a backhaul link between a donor base station and a relay base station to the relay station for communicating with the donor base station and transmitting a control channel indicating the allocated resources to the relay base station, wherein the control channel is transmitted on a subset of physical resource blocks (PRBs) of subframes assigned for downlink communications on the backhaul link. | 07-07-2011 |
20110170436 | APPARATUS AND METHOD FOR RELAY TRANSITION TIME - An apparatus and method for establishing a relay transition time in a network node in a wireless communication system comprising comparing a network node transmit/receive (TX/RX) switch time to a switch threshold; and using a fraction of the cyclic prefix (CP) as a guard period if the network node TX/RX switch time is less than or equal to the switch threshold, or using a sounding reference signal (SRS) configured channel to blank out a last symbol if the network node TX/RX switch time is greater than the switch threshold. | 07-14-2011 |
20110170458 | APPARATUS AND METHOD FOR PHYSICAL CONTROL FORMAT INDICATOR CHANNEL (PCFICH) INFORMATION SHARING OVER RELAY BACKHAUL LINK - An apparatus and method for communicating information in a relay downlink backhaul between a base station and at least one relay node comprising: determining a first starting symbol index of at least one control channel in the relay downlink backhaul; determining a second starting symbol index of at least one data channel in the relay downlink backhaul; and communicating information using the at least one control channel based on the first starting symbol index and the at least one data channel based on the second starting symbol index in the relay downlink backhaul. In one example, the apparatus and method comprise receiving information using a control channel based on a first starting symbol index and a data channel based on a second starting symbol index in the relay downlink backhaul. | 07-14-2011 |
20110188587 | MIMO RELATED SIGNALING IN WIRELESS COMMUNICATION - Certain aspects of the present disclosure relate to techniques for multiple-input multiple-output (MIMO) related signaling in a wireless communication system. In an aspect, a method for wireless communication is provided which includes receiving a signal associated with a downlink control channel, the signal including information specific to a user equipment (UE); and selecting, based on the information, a UE-specific reference signal (RS) pattern from a plurality of UE-specific RS patterns. | 08-04-2011 |
20110194407 | Systems and Methods of Mobile Relay Mobility in Asynchronous Networks - A system and method of managing adjustment of synchronization timing for handover of a mobile relay is disclosed. The method includes repositioning coverage of the mobile relay from a first network access point to a second network access point and adjusting a synchronization timing of the mobile relay in an asynchronous network of the wireless communication system. | 08-11-2011 |
20110194482 | METHOD AND APPARATUS FOR RELAY BACKHAUL DESIGN IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate techniques for design of relay backhaul to support mobility of relay nodes in a wireless communication system. According to various aspects herein, techniques are provided to enable and support the use of mobile relays and to facilitate handover of mobile relays between respective donor cells. More particularly, techniques are provided herein for relay backhaul control channel assignment associated with hand in or hand out of mobile relays, access/backhaul resource partitioning for mobile relays, and management of quality of service (QoS) requirements associated with a relay handover. | 08-11-2011 |
20110194483 | METHOD AND APPARATUS FOR RELAY BACKHAUL DESIGN IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate techniques for design of relay backhaul to support mobility of relay nodes in a wireless communication system. According to various aspects herein, techniques are provided to enable and support the use of mobile relays and to facilitate handover of mobile relays between respective donor cells. More particularly, techniques are provided herein for relay backhaul control channel assignment associated with hand in or hand out of mobile relays, access/backhaul resource partitioning for mobile relays, and management of quality of service (QoS) requirements associated with a relay handover. | 08-11-2011 |
20110194504 | METHOD AND APPARATUS FOR SUPPORTING SINGLE-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (SU-MIMO) AND MULTI-USER MIMO (MU-MIMO) - Techniques for supporting data transmission with single-user multiple-input multiple-output (SU-MIMO) and multi-user MIMO (MU-MIMO) are described. A base station may transmit multiple data streams on a given time-frequency resource to a single user equipment (UE) for SU-MIMO or to multiple UEs for MU-MIMO. In an aspect, an antenna port assignment for a UE for MU-MIMO may be conveyed by reusing one or more fields of a downlink control information (DCI) format. In another aspect, a hierarchical two-tier structure may be used to convey an antenna port assignment for a UE for MU-MIMO. In yet another aspect, a UE may be configured via higher layer to report only channel quality indicator (CQI), or both CQI and precoding matrix indicator (PMI), when operating in a transmission mode supporting SU-MIMO and MU-MIMO. In yet another aspect, a UE may report CQI such that SU-MIMO and MU-MIMO can be supported for the UE. | 08-11-2011 |
20110194511 | MULTI-USER CONTROL CHANNEL ASSIGNMENT - A method, an apparatus, and a computer program product for wireless communication are provided in which a resource assignment utilizing the PDCCH and/or the R-PDCCH may be addressed to a group of UEs, rather than an individual UE, by utilizing a group identifier for indicating to the group that there may be information for any UE in the group in the PDSCH. In this way, the capacity of the PDCCH, which is limited, is multiplied and a potential bottleneck at PDCCH scheduling can be relieved. | 08-11-2011 |
20110194527 | FREQUENCY AND TIME DOMAIN RANGE EXPANSION - For range expansion, a determination to enter range expansion may be made based on a signal strength differential for user equipment (UE) communications between a first class of base stations and a second class of base stations. If the signal strength differential is beyond a certain threshold, range expansion may be implemented. In range expansion, a signal is transmitted, on a resource coordinated with at least one of the first class of base stations, from one of the second class of base stations to the UE which could experience dominant interference from one of the first class of base stations if coordination were not performed. Transmission power may be reduced from one of the first class of base stations on that resource. The second signal may be transmitted within the region of the Physical Downlink Shared Channel. | 08-11-2011 |
20110199919 | METHOD AND APPARATUS FOR ASSOCIATING A RELAY IN WIRELESS COMMUNICATIONS - Methods and apparatuses are provided that facilitate associating with relays in a wireless network. A device can select whether to utilize relay assistance where present based at least in part on measuring one or more determined or projected parameters related to the relay. Where utilizing a relay results in user-plane data channel conditions above a threshold level and control channel conditions below a threshold level, a serving base station can determine whether to employ another base station to serve the device, jointly serve a relay with an additional base station, and/or the like. | 08-18-2011 |
20110199944 | APERIODIC SOUNDING REFERENCE SIGNAL TRANSMISSION METHOD AND APPARATUS - A method and apparatus for facilitating an aperiodic transmission of a sounding reference signal (SRS) are disclosed. Transmission resources are allocated to the aperiodic SRS transmission. A portion of a first downlink control message is modified to produce a second downlink control message, where the first downlink control message does not trigger an aperiodic SRS transmission. The second downlink message is transmitted. | 08-18-2011 |
20110200020 | CONTINUOUS MODE OPERATION FOR WIRELESS COMMUNICATIONS SYSTEMS - Certain aspects of the present disclosure propose techniques for a continuous communications mode in a wireless communications system. The technique may involve processing bundles of transmission time interval (TTI) transmissions having transmission times that are mapped to voice-over-internet-protocol (VOIP) arrival times, wherein the bundled TTI transmissions are processed without acknowledgements to indicate the bundled TTI transmissions have been successfully received. | 08-18-2011 |
20110205948 | EXTENDING AN EFFECTIVE CONTROL CHANNEL PERIODICITY VIA DISCONTINUOUS RECEPTION (DRX) - Discontinuous reception (DRX) operation may be utilized to maintain connection with user equipment (UE) by increasing the effective control channel transmission periodicity. UEs may be configured with a compatible control channel transmission periodicity such that multiple UEs may share a resource in a time-division-multiplexed manner using DRX offsets and periodicity, effectively extending control channel transmission periodicity through resource overloading. | 08-25-2011 |
20110207415 | CONTROL FOR UPLINK IN MIMO COMMUNICATION SYSTEM - In a wireless communication network that performs Multiple Input Multiple Output (MIMO) communication, uplink power control signals are provided to a user equipment (UE) via a base station signaled power allocation scheme responsive to a determination of whether or not the uplink transmission is in a interference limited condition relative to a neighboring cell. | 08-25-2011 |
20110211595 | METHOD AND APPARATUS TO FACILITATE AN EARLY DECODING OF SIGNALS IN RELAY BACKHAUL LINKS - Methods, apparatuses, and computer program products are disclosed that facilitate an early decoding of relay signals. A relay receives a signal within a sub-frame from a network. A first and second reference symbol is detected within the sub-frame such that the first reference symbol is detected before the second reference symbol. The signal is then decode based on the first reference symbol. | 09-01-2011 |
20110216682 | METHOD AND APPARATUS FOR CHANNEL QUALITY INDICATOR (CQI) ENHANCEMENTS - Certain aspects of the present disclosure relate to techniques for reporting of channel quality indication in Long Term Evolution Advanced (LTE-A) wireless systems. | 09-08-2011 |
20110228724 | USER-SPECIFIC SEARCH SPACE DESIGN FOR MULTI-CARRIER OPERATION - Certain aspects of the present disclosure relate to techniques for user-specific search space design for multi-carrier operation in Long Term Evolution Advanced (LTE-A) systems. The user-specific search space can be designed for searching Physical Downlink Control Channels (PDCCHs) transmitted on one component carrier (CC) that schedules Physical Downlink Shared Channel/Physical Uplink Shared Channel (PDSCH/PUSCH) transmissions on two or more different CCs. In one aspect, multiple independent user-specific search spaces can be designed. In another aspect, one user-specific search space can be randomly derived and then expanded to accommodate search for multiple CCs. In yet another aspect, the search space design can retain randomness in starting search element indices of multiple PDSCH/PUSCH CCs, while overlapping of search spaces for multiple PDSCH/PUSCH CCs can be avoided. | 09-22-2011 |
20110228731 | UPLINK CONTROL CHANNEL RESOURCE ALLOCATION FOR TRANSMIT DIVERSITY - Systems and methods for resource allocation for an uplink control channel for a user equipment (UE) using multiple transmit antennas in a wireless communication network are disclosed. A plurality of orthogonal resources for use by the UE on the uplink control channel is selected. Control information is transmitted from the UE on the uplink control channel on the plurality of orthogonal resources with transmit diversity. | 09-22-2011 |
20110228732 | METHODS OF RESOLVING PDCCH CONFUSION IN LTE - In a method of wireless communication, a UE receives a configuration to receive a CIF for a serving cell of a plurality of serving cells. In addition, the UE monitors a PDCCH on a primary cell of the plurality of serving cells. Said primary cell is different than said serving cell. Furthermore, the UE assumes information received in the PDCCH is for said primary cell when the received information has a common payload size and is in a common search space with a first CCE index in the common search space being equal to a first CCE index in a UE specific search space. | 09-22-2011 |
20110235582 | SUBFRAME DEPENDENT TRANSMISSION POWER CONTROL FOR INTERFERENCE MANAGEMENT - According to certain aspects, transmission power control may be applied to uplink transmissions in a subframe-type dependent manner as part of an interference management scheme. | 09-29-2011 |
20110235584 | METHOD AND APPARATUS FOR RELIABLE TRANSMISSION OF CONTROL INFORMATION IN A WIRELESS COMMUNICATION NETWORK - Techniques for reliably transmitting and receiving control information in a wireless network are described. A cell may typically send control information on a control channel and associated data (e.g., system information) on a data channel in the same subframe. This subframe may have strong interference from other cells. For cross-subframe signaling, the cell may transmit the control information in a first subframe and the associated data in a second subframe. The first subframe may be a usable subframe for the cell and may have less interference from other cells. A UE may not know the location of the first subframe and may perform window-based decoding. The UE may decode the control channel in at least one subframe within a decoding window covering the first subframe to obtain the control information. The UE may then decode the data channel in the second subframe based on the control information to obtain the data. | 09-29-2011 |
20110235597 | REFERENCE SIGNALS FOR MULTI-USER MIMO COMMUNICATION - Methods and apparatuses are provided that facilitate generating sequences for transmitting reference signals (RS) based at least in part on a cell identifier or other parameters common for a plurality of cells. Where the plurality of cells provide similar joint uplink resources to a device in multi-user multiple-input multiple-output (MIMO), the device can transmit a signal to the plurality of cells over the joint uplink resources. For RSs transmitted according to a sequence generated based on a cell specific identifier or other parameters, the device can utilize a cell identifier, or other parameters, common to the plurality of cells such that the plurality of cells can all decode the RSs. In this regard as well, the plurality of cells can each receive or generate the common cell identifier or other parameters to properly decode the RSs. | 09-29-2011 |
20110237267 | UE-RS SEQUENCE INITIALIZATION FOR WIRELESS COMMUNICATION SYSTEMS - Pseudo-random sequences of a plurality of user equipment specific reference signals (UE-RSs) for use by a plurality of user equipments (UEs) are initialized, the initialization of each pseudo-random sequence associated with each UE-RS being independent of a specific UE identifier and independent of a resource bandwidth assigned to a specific UE. Pseudo-random sequences of the UE-RSs are generated. At least one of the pseudo-random sequences is mapped to a portion of common resources for at least one UE among the plurality of UEs. | 09-29-2011 |
20110243012 | FEEDBACK OF CONTROL INFORMATION FOR MULTIPLE CARRIERS - Techniques for sending control information relating to multiple downlink carriers and data on a single uplink carrier are described. A user equipment (UE) may be scheduled to transmit on a designated uplink carrier. The UE can multiplex control information for multiple downlink carriers with data for transmission on the uplink carrier in a same subframe. Multiplexing may be performed according to a type of the control information and/or an ordering, priority, or association of the downlink carriers. The UE can selectively encode the control information separately for each downlink carrier and/or jointly across downlink carriers. The control information may be mapped to a single layer or multiple layers of a data channel. The UE may send the multiplexed control information and data on the data channel in the subframe while maintaining a single-carrier waveform. | 10-06-2011 |
20110249611 | SUBFRAME STAGGERING FOR RELAY COMMUNICATION - Techniques for supporting relay communication with subframe staggering are described. For subframe staggering, subframes of different relays are staggered from one another, which can increase the number of potential backhaul subframes. In one design, a first relay determines its access subframes and backhaul subframes, which correspond to different non-overlapping subsets of the subframes of the first relay. The first relay communicates with at least one UE during the access subframes and communicates with a base station during the backhaul subframes. The subframes of the first relay are offset from the subframes of a second relay communicating with the base station. In one design, the access subframes of the first relay includes all subframes with either even or odd indices, which can support data transmission with HARQ. In one design, at least one access subframe corresponds to at least one reserved subframe having reduced transmit power from the base station. | 10-13-2011 |
20110249647 | SYSTEMS, APPARATUS AND METHODS TO FACILITATE TRANSMISSION OF ACKNOWLEDGEMENT SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - In accordance with aspects of the disclosure, a method, apparatus, and computer program product are provided for wireless communication. The method, apparatus, and computer program product may be provided for mapping a first signal to one or more resource elements being utilized by a second signal and transmitting the first signal utilizing the resource elements. The method, apparatus, and computer program product may be provided for pre-defining one or more resource blocks in a data region of a frame structure and transmitting an acknowledgement signal in at least one of the pre-defined resource blocks. The method, apparatus, and computer program product may be provided for identifying at least one downlink control channel and transmitting acknowledgment signals in the at least one downlink control channel for a plurality of user equipment. | 10-13-2011 |
20110249767 | METHOD AND APPARATUS FOR REFERENCE SIGNAL SEQUENCE MAPPING IN WIRELESS COMMUNICATION - A wireless communication method implemented in a multi-user, multi-input multi-output MU-MIMO system is disclosed which includes forming one or more antenna port sets, wherein an antenna port set comprises two or more antenna ports and allocating transmission resources to a user equipment reference signal UE-RS, the allocating being based at least in part on an antenna port set index. | 10-13-2011 |
20110255484 | DOWNLINK ASSOCIATION SET FOR UPLINK ACK/NACK IN TIME DIVISION DUPLEX SYSTEM - In a Time Division Duplex (TDD) system, downlink and uplink communications share the same bandwidth but occupy different subframes. When the downlink has more subframes than the uplink, special treatment on user equipment (UE) ACK/NACK feedback is needed. One uplink may need to ACK multiple downlink subframes. A downlink association without unnecessary ACK/NACK resources sets accounts for subframes for which ACK feedback is not desired. Examples of such subframes include: a blank subframe; an almost blank subframe where only a cell specific Reference Signal (RS) is transmitted; a Time Division Multiplex (TDM) partition in which an evolved NodeB (eNB) only transmits a Physical Downlink Shared Channel (PDSCH) or a Physical Downlink Control Channel (PDCCH) indicating Semi-persistent scheduling (SPS) at certain downlink subframes; a Downlink Pilot Timeslot (DwPTS) with a certain special subframe configuration where an eNB does not send the PDSCH and the UE is not in SPS active mode in the DwPTS; and a Multi-Media Broadcast over a Single Frequency Network (MBSFN) subframe when the UE is not in SPS active mode in the MBSFN subframe. | 10-20-2011 |
20110255485 | METHOD AND APPARATUS FOR CONVEYING RESOURCE ASSIGNMENT FOR MULTIPLE SYSTEM BANDWIDTHS - Techniques for supporting communication with user equipment (UEs) of different types on a plurality of system bandwidths are described. UEs of each type may operate on one or more available system bandwidths. Resources assigned to a UE may be conveyed by a resource allocation field of a control message sent to the UE. The resource allocation field may have different configurations (e.g., different sizes and/or interpretations) for different system bandwidths. In one design, the resource allocation field and the control message sent to the UE have different sizes for the plurality of system bandwidths. A base station may determine the size of the resource allocation field based on a system bandwidth selected for the UE. In another design, the resource allocation field may have a same size but different interpretations (e.g., different resource mappings) for the plurality of system bandwidths. | 10-20-2011 |
20110263286 | METHOD AND APPARATUS FOR CONTENTION-BASED WIRELESS TRANSMISSIONS - Certain aspects of the present disclosure relate to a technique for managing contention-based uplink data transmissions. According to certain aspects, a base station may allocate a common contention-based resource to a plurality of user equipment (UEs). The plurality of UEs may utilize the contention-based resource to transmit uplink data without prior scheduling, which may result in transmission collisions. Certain aspects of the present disclosure provide a mechanism for determining which UE sent an uplink transmissions based on one or more transmission parameter signaled to the UEs. | 10-27-2011 |
20110267991 | HARQ FEEDBACK FOR RELAY SYSTEMS - Certain aspects of the present disclosure provide techniques and apparatuses for acknowledging transmissions in a system utilizing a half-duplex node. According to certain aspects, a half-duplex node may receive, in a plurality of subframes, a plurality of downlink transmissions and send an uplink transmission comprising a plurality of bits indicative of whether the downlink transmissions were successfully received. | 11-03-2011 |
20110268049 | APPARATUS AND METHOD FOR RANDOM ACCESS SIGNALING IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for providing random access signaling in a multiple input multiple output (MIMO) wireless communication system are provided. The apparatus and method determine a random access transmission scheme for the MIMO communication system based at least in part on a number of transmit antennas in the system. The random access signals are transmitted in a random access channel using the random access transmission scheme. Power control for the random access channel is performed based at least in part on the random access transmission scheme. | 11-03-2011 |
20110268064 | RESOURCE AVAILABILITY FOR PDSCH IN RELAY BACKHAUL TRANSMISSIONS - Certain aspects of the present disclosure provide techniques for indicating (e.g., by a donor base station) resources available for physical downlink shared channel (PDSCH) transmissions from a base station is provided. Certain aspects of the present disclosure provide techniques for determining (e.g., by a relay node or UE) resources available for physical downlink shared channel (PDSCH) transmissions from a base station. | 11-03-2011 |
20110268080 | METHOD AND APPARATUS FOR CONTROL AND DATA MULTIPLEXING IN WIRELESS COMMUNICATION - A method of wireless communication includes determining a number of symbols for uplink control information (UCI) on each of a plurality of layers, multiplexing symbols for the UCI with data on multiple layers such that the symbols are time aligned across the layers, and sending the multiplexed symbols on the multiple layers on uplink. In some designs, the number of symbols for the UCI may be determined based on a spectral resource parameter. | 11-03-2011 |
20110274022 | MODULATION AND CODING SCHEME ADJUSTMENT FOR UPLINK CHANNEL POWER CONTROL IN ADVANCED TELECOMMUNICATION NETWORKS - A method of adjusting the modulation and coding scheme for uplink channel power control in advanced telecommunication networks includes receiving an indication of a power adjustment mode for an uplink multiple-input multiple-output (MIMO) transmission. The power of the uplink MIMO transmission is adjusted according to the received power adjustment mode. | 11-10-2011 |
20110274031 | EXPANDED SEARCH SPACE FOR R-PDCCH IN LTE-A - Certain aspects of the present disclosure provide techniques and apparatuses for providing an expanded search space for a relay-specific control channel on a backhaul link. According to certain aspects, due to inband interference, a Relay Physical Downlink Control Channel (R-PDCCH) may be signaled utilizing resources reserved for backhaul data. According to certain aspects, a two-dimensional search space may be provided for R-PDCCH. R-PDCCH may be transmitted in one of a plurality of layer-specific search spaces corresponding to one of a plurality of antenna ports. Further, in a layer-specific search space, R-PDCCH may be transmitted using at least one of multiple R-PDCCH decoding candidates from a common search space and/or a relay node-specific search space. | 11-10-2011 |
20110274064 | Power control with cross-subframe assignment - A method includes receiving a cross-subframe assignment in a first subframe, targeting a second subframe in which a transmission power control (TPC) command is to be applied. The method may also include adjusting transmit power in accordance with the TPC command during a third subframe, a predefined number of subframes after the first subframe. Another method includes receiving a cross-subframe assignment in a first subframe. The cross-subframe assignment targets a second subframe in which a first TPC command is to be applied. The method may also include receiving a nominal grant in the first subframe that targets an identified subframe to which a second TPC command is to be applied. The method may also include adjusting the transmit power according to the first TPC command, the second TPC command or a function of the first TPC command and the second TPC command during the second subframe or the identified subframe. | 11-10-2011 |
20110275335 | METHODS AND SYSTEMS FOR SRS POWER SCALING IN CARRIER AGGREGATION - Certain aspects of the present disclosure relate to techniques for scaling transmission power. According to certain aspects, a technique for scaling transmission power may include scaling transmission power of one or more uplink channel symbols to be transmitted in a subframe, utilizing a first set of one or more scaling coefficients, scaling transmission power of one or more sounding reference signal (SRS) symbols to be transmitted in the same subframe, utilizing a second set of one or more scaling coefficients, wherein the first set of scaling coefficients is different from the second set of scaling coefficients, and transmitting the scaled one or more uplink channel symbols and the scaled one or more SRS symbols utilizing the scaled transmission power values. | 11-10-2011 |
20110275403 | UPLINK POWER CONTROL IN AGGREGATED CARRIER COMMUNICATION SYSTEMS - A user equipment (UE) is configured for carrier aggregation in a wireless communication system. The UE decodes transmit power control commands from at least one downlink control channel for at least one uplink channel, where the at least one uplink channel is to be transmitted in a component carrier of a number of component carriers. The UE compares a commanded transmit power for the at least one uplink channel with a configured maximum transmit power of the component carrier and transmits the at least one uplink channel in the component carrier. | 11-10-2011 |
20110280164 | DAI DESIGNS FOR FDD CARRIER AGGREGATION - Certain aspects of the present disclosure relate to techniques for indicating downlink assignments to a user equipment (UE). According to certain aspects, the techniques generally involve generating a downlink assignment index (DAI) indicating a number of assigned downlink transmissions for a user equipment (UE) configured to communicate using multiple component carriers and transmitting a physical downlink control channel (PDCCH) containing the DAI to the user equipment (UE) in a frequency division duplexing (FDD) subframe in which uplink and downlink transmissions may take place at the same time on different carrier frequencies. | 11-17-2011 |
20110280201 | SYSTEM, APPARATUS AND METHOD FOR CONTROL CHANNEL CONFIGURATION IN WIRELESS COMMUNICATION SYSTEMS - In accordance with aspects of the disclosure, a method, apparatus, and computer program product are provided for wireless communication. The method, apparatus, and computer program product, in an implementation, may be configured to provide separate control channels for each of downlink grant information and uplink grant information, encode the control channels with an identifier known only to receiving nodes that are configured to decode the control channels with the identifier, and convey information to the receiving nodes that the identifier is known to the receiving nodes. The method, apparatus, and computer program product, in an implementation, may be configured to determine an aggregation level of a common search space related to common control resources, wherein the aggregation level is less than four, and receive control data from one or more candidates in the common search space that include contiguous control channel elements according to the aggregation level. | 11-17-2011 |
20110286391 | QOS-BASED POWER CONTROL IN AGGREGATED CARRIER COMMUNICATION SYSTEMS - A user equipment (UE) is configured for carrier aggregation in a wireless communication system. The UE selects control information to be transmitted in an uplink control channel format in a component carrier of two or more component carriers, where the control information includes information types associated with different information reliability requirements. The UE generates an open-loop power control parameter and/or a closed-loop power control parameter based on the information types. The UE transmits the control information in the uplink control channel format at a power level determined by the open-loop power control parameter and/or the closed-loop power control parameter. | 11-24-2011 |
20110286406 | ACKNOWLEDGMENT TRANSMISSIONS UNDER CROSS-SUBFRAME RESOURCE ALLOCATION IN LTE-A - In release 8 of the LTE standard (“Rel-8”), downlink data transmissions of one or more user equipments (UEs) in one subframe may be scheduled by control channels of different subframes. The resources for use in acknowledging whether or not a downlink data transmission was successfully received by a UE may be based on a starting control channel element (CCE) of a corresponding control channel. Two or more control channels of different subframes may have the same starting CCE, which may lead to acknowledgment resource collisions between the one or more UEs. Therefore, certain aspects of the present disclosure provide techniques to avoid acknowledgment resource collisions between the one or more UEs. | 11-24-2011 |
20110292874 | POWER HEADROOM REPORTING FOR MULTICARRIER LTE SYSTEMS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus maintains at least one PHR trigger for triggering communication of a PHR for a plurality of component carriers. In addition, the apparatus communicates the PHR for at least one of the component carriers upon the at least one PHR trigger being triggered. The communicated PHR may be an aggregated PHR that includes power headroom information on the PCC and activated SCCs. The communicated PHR may further include an index associating information in the PHR to a corresponding component carrier. The communicated PHR may further include information indicating use of a PUSCH reference for computing the PHR for the at least one of the component carriers on which there is no PUSCH transmission. | 12-01-2011 |
20110294529 | SOUNDING REFERENCE SIGNAL ENHANCEMENTS FOR WIRELESS COMMUNICATION - A wireless communication method includes determining whether a wireless device desires dynamic sounding reference signal (SRS) resources and providing, based on the determination, a dynamic SRS resource allocation to the wireless device. | 12-01-2011 |
20110317643 | CONTROL INFORMATION SIGNALING FOR MIMO TRANSMISSIONS - Certain aspects of the present disclosure provide techniques for conveying downlink control information (DCI). According to certain aspects, the DCI comprises at least a first field that indicates both a rank indication (RI) and a number of enabled transport blocks (TBs) and at least a second field that indicates either a modulation and coding scheme (MCS) for an enabled TB if the first field indicates more than one TB is enabled or information other than the MCS if the first field indicates a single TB is enabled. | 12-29-2011 |
20110317646 | DEMODULATION REFERENCE SIGNALS FOR RETRANSMISSION IN WIRELESS COMMUNICATION - Provided is a method for wireless communication which includes transmitting codewords according to an initial transmission rank, receiving downlink transmissions indicating at least one of the codewords to be retransmitted, constructing a demodulation reference signal (DM-RS) to be sent with the at least one codeword to be retransmitted, and retransmitting the at least one codeword with the DM-RS according to a retransmission rank. The downlink transmissions may include one or more physical hybrid automatic retransmission request indicator channels and the DM-RS may be constructed based at least in part on information in the downlink transmissions. | 12-29-2011 |
20110319120 | Interaction Between Maximum Power Reduction and Power Scaling in Wireless Networks - Methods, apparatuses, and articles of manufacture are disclosed for adjusting a power level in connection with transmitting parallel uplink channels. In one aspect, a user equipment determines a power-limited condition in which a total transmit power of a group of power-controlled channels exceeds a maximum level in a transmission subframe. The user equipment may determine, in an iterative fashion, power backoff values by which to establish a configured maximum power level. The parallel uplink channels in the group may be prioritized and different backoff values may be used with channels having different priorities. The user equipment may thereafter adjust a transmit power of the power-controlled channels based on the configured maximum power level. | 12-29-2011 |
20110321050 | METHOD AND APPARATUS FOR PROVIDING SHARED SCHEDULING REQUEST RESOURCES - In accordance with one or more embodiments and corresponding disclosure thereof, various aspects are described in connection with providing shared scheduling request (SR) resources to devices for transmitting SRs. Identifiers related to the shared SR resources can be signaled to the devices along with indications of the shared SR resources in given time durations. Thus, devices can transmit an SR over shared SR resources related to one or more received identifiers for obtaining an uplink grant. This can decrease delay associated with receiving uplink grants since the device need not wait for dedicated SR resources before transmitting the SR. In addition, overhead can be decreased on control channels, as compared to signaling dedicated SR resources and/or uplink grants. Moreover, identifiers related to SR resources can correspond to a grouping of devices, such that a device can transmit over shared SR resources related to a group including the device. | 12-29-2011 |
20120009923 | FALLBACK OPERATION FOR CROSS-CARRIER SIGNALING IN MULTI-CARRIER OPERATION - Techniques for supporting fallback operation in a multi-carrier communication system are described. In one aspect, a UE may determine at least one first downlink control information (DCI) format to monitor on a first carrier. The UE may monitor for the first DCI format(s) on the first carrier to detect DCI sent to the UE. The UE may receive a reconfiguration message related to communication on a plurality of carriers by the UE with cross-carrier signaling, and may determine at least one second DCI format to monitor on the first carrier based on the reconfiguration message. The UE may monitor for the first DCI format(s) and the second DCI format(s) on the first carrier after receiving the reconfiguration message. | 01-12-2012 |
20120014318 | MULTIPLEXING DEMODULATION REFERENCE SIGNALS IN WIRELESS COMMUNICATIONS - Methods and apparatuses are provided for determining cyclic shift (CS) values and/or orthogonal cover codes (OCC) for a plurality of demodulation reference signals (DM-RS) transmitted over multiple layers in multiple-input multiple-output (MIMO) communications. A CS index can be received from a base station in downlink control information (DCI) or similar signaling. Based at least in part on the CS index, CS values for the plurality of DM-RSs can be determined. In addition, OCC can be explicitly signaled or similarly determined from the CS index and/or a configured CS value received from a higher layer. In addition, controlling assignment of CS indices and/or OCC can facilitate providing orthogonality for communications from paired devices in multiuser MIMO. | 01-19-2012 |
20120020230 | CHANNEL FEEDBACK BASED ON REFERENCE SIGNAL - Techniques for supporting channel measurement and reporting in a wireless communication system are described. In one design, a cell transmits a cell-specific reference signal (CRS) used for channel estimation and coherent demodulation and a channel spatial information reference signal (CSI-RS) used for channel measurement and channel feedback reporting. The cell may transmit the CSI-RS less frequently than the CRS, or from more antenna ports than the CRS, or on fewer resource elements than the CRS, or a combination thereof. In one design, a user equipment (UE) determines at least one bandwidth part configured for the UE, with each bandwidth part covering at least one subband. The UE receives the CRS and CSI-RS from the cell, determines channel feedback information for the at least one bandwidth part based on the CSI-RS, sends the channel feedback information to the cell, and receives data transmitted by the cell based on the channel feedback information. | 01-26-2012 |
20120033624 | RESOURCE ALLOCATION AND TRANSMISSION FOR COORDINATED MULTI-POINT TRANSMISSION - Methods, apparatuses and articles of manufacture are disclosed that provide for partial downlink and uplink resource allocations among cooperating cells in a CoMP transmission to a user equipment. The resource allocation can be based on channel conditions and differing capabilities and restrictions of cooperating cells such as in support of heterogeneous network configurations. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims. | 02-09-2012 |
20120033646 | SYSTEM ACCESS FOR HETEROGENEOUS NETWORKS - A user equipment (UE) begins to access a heterogeneous network by obtaining synchronization parameters from system signals transmitted by a weaker one of a number of neighboring cells. After synchronizing with the network, the UE obtains resource scheduling information for the weaker cell. The resource scheduling information indicates at least one resource used by the weaker cell. The UE may then cancel the stronger cells of the neighboring cell. The resource scheduling information allows the UE to identify broadcasted system blocks for the weaker cell from which it may decode and retrieve control information used to complete access to the network. | 02-09-2012 |
20120039199 | APERIODIC CHANNEL QUALITY INDICATOR REPORT IN CARRIER AGGREGATION - Techniques for reporting channel quality information (CQI) in a multi-carrier wireless communication system are disclosed. In one aspect, a user equipment determines one or more reporting groups, each comprising a plurality of component carriers which are configured for the user equipment. The user equipment may detect a trigger from a base station that selects a reporting group and may respond to the trigger by sending CQI for at least the activated component carriers in the selected reporting group. | 02-16-2012 |
20120039220 | INTERLEAVING FOR RELAY PHYSICAL DOWNLINK CONTROL CHANNEL (R-PDCCH) - Certain aspects of the present disclosure provide methods and apparatus for interleaving control information for one or more nodes. For certain aspects, the control information may comprise one or more Relay Physical Downlink Control Channels (R-PDCCHs) for one or more relay nodes. The interleaving may comprise interleaving Common Reference Signal (CRS)-based R-PDCCH, wherein the resource elements (REs) for CRS and/or Channel State Information Reference Signal (CSI-RS) may be discounted in a physical resource block (PRB). | 02-16-2012 |
20120039227 | FEEDBACK BUNDLING FOR POWER-LIMITED DEVICES IN WIRELESS COMMUNICATIONS - Methods, systems, and devices are described for bundling feedback related to downlink transmissions on a plurality of component carriers (CCs). In some examples, a base station configures a multi-carrier mobile device to use different feedback bundling schemes when it determines that the mobile device is power limited. The bundling scheme configured for the mobile device may be based, in part, on one or more transmission modes of the downlink CCs. Bundling schemes may include combinations of bundling techniques and an order in which these techniques are applied. In particular, the bundling techniques may include CC bundling in combination with spatial bundling and/or feedback repetition. For efficiency and performance, a bundling scheme may require application of CC bundling before resorting to use of feedback repetition. | 02-16-2012 |
20120039252 | CHANNEL STATE INFORMATION FEEDBACK FOR CARRIER AGGREGATION - Techniques for reporting channel state information (CSI) in a multi-carrier wireless communication system are disclosed. In some examples, a user equipment determines a configuration for reporting CSI for each component carrier (CC) in a plurality of component carriers. For a first subframe, the user equipment determines a priority for transmitting CSI associated with the plurality of CCs based at least in part on the configuration. The user equipment sends, in the first subframe, a CSI report including the prioritized CSI. The CSI report can include CSI for a single CC, or CSI for multiple CCs. For multi-CC reporting of CSI, the user equipment can multiplex CSI reports or CSI elements for the plurality of CCs up to an available payload size. | 02-16-2012 |
20120039269 | METHOD AND APPARATUS OF DEACTIVATING CARRIERS IN WIRELESS COMMUNICATIONS - Methods and apparatuses are provided for determining whether to deactivate one or more uplink carriers based at least in part on determining deactivation of a downlink carrier. A linking of the one or more uplink carriers to the downlink carrier can be obtained for determining whether to deactivate the one or more uplink carriers. The linking can be a system information block linking, a carrier indicator field linking, a pathloss linking, an uplink timing reference linking, and/or the like. The one or more uplink carriers can be deactivated based on the linking and/or another linking to one or more other downlink carriers. | 02-16-2012 |
20120039275 | PHYSICAL UPLINK CONTROL CHANNEL RESOURCE ALLOCATION FOR MULTIPLE COMPONENT CARRIERS - Techniques for sending control information in a wireless network are disclosed. A multi-carrier user equipment (UE) may receive a downlink grant on a physical downlink control channel (PDCCH) on a first component carrier (CC). The UE may also receive a data transmission associated with the PDCCH on a physical downlink shared channel (PDSCH) on a second CC. In some examples, the UE determines physical uplink control channel (PUCCH) resources for acknowledging the data transmission based on the first CC on which the PDCCH is received, the second CC on which the data transmission is received, and a transmission mode of the second CC. The UE may send acknowledgement/negative acknowledgement (ACK/NACK) information for the data transmission based on the PUCCH resources. | 02-16-2012 |
20120039279 | ACK/NACK TRANSMISSION FOR MULTI-CARRIER OPERATION - Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In some aspects, a user equipment (UE) receives a data transmission on at least one component carrier (CC) in a plurality of configured CCs. The UE determines acknowledgement/negative acknowledgement (ACK/NACK) information for the data transmission and determines an uplink channel for sending the ACK/NACK information. When the ACK/NACK information is sent on a PUCCH, the UE may perform power control based on which CCs in the plurality of configured CCs data is received. When the ACK/NACK information is sent on a PUSCH, the UE may determine a number of resource elements based on its CC configuration. | 02-16-2012 |
20120039280 | ACK/NACK TRANSMISSION FOR MULTI-CARRIER OPERATION WITH DOWNLINK ASSIGNMENT INDEX - Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In one aspect, a UE determines a number of acknowledgement/negative acknowledgement (ACK/NACK) bits for a data transmission on one more component carriers (CCs) based on information obtained from a grant. The grant may be a downlink grant or an uplink grant, and the information obtained may include a number of CCs scheduled for data transmission and/or identifiers of the scheduled CCs. The UE may determine the number of ACK/NACK bits for acknowledging the data transmission based on the number of scheduled CCs and the identifier of each scheduled CC. | 02-16-2012 |
20120039283 | SEARCH SPACE DESIGN FOR RELAY PHYSICAL DOWNLINK CONTROL CHANNEL (R-PDCCH) - Certain aspects of the present disclosure provide methods and apparatus for designing, generating, and monitoring the search space for control information for a node, such as a relay node (RN). This control information may comprise a Relay Physical Downlink Control Channel (R-PDCCH). The search space design may use contiguous, but physically distributed transmission resource units (e.g., physical resource blocks (PRBs)) to increase frequency diversity or frequency selectivity. For certain aspects, pairs of transmission resource units spanning two adjacent slots may have the same virtual resource block (VRB) index. | 02-16-2012 |
20120044841 | H-ARQ TIMING AND BACKHAUL SUBFRAME CONFIGURATION FOR TDD RELAY IN LTE-A - A method for wireless communication is provided, at a half-duplex node operating in TDD mode and may be used with an eNB in an LTE system. The method comprises receiving a configuration of a first set of subframes for a first link communication containing at least one downlink subframe and at least one uplink subframe. A second set of subframes for a second link communication is then determined. This second set includes at least one backward compatible downlink hybrid automatic repeat request process and at least one backward compatible uplink hybrid automatic repeat request process utilizing a second set of subframes. Communication begins with a first set of nodes using the first link and the first set of subframes. A second set of nodes using the second link and the second set of subframes is also used for communication. Communication to a legacy node is also supported. | 02-23-2012 |
20120044881 | METHODS AND SYSTEMS FOR UPLINK TRANSMIT DIVERSITY - Certain aspects of the present disclosure propose methods for supporting uplink transmit diversity in a wireless communication system. The proposed methods may eliminate ambiguity in decoding physical downlink control channel aggregation level and resources that are used by different antennas of a user equipment. In addition, a method is proposed for resource allocation for ACK/NACK repetition. | 02-23-2012 |
20120058797 | POWER CONTROL ON A DEACTIVATED COMPONENT CARRIER - A wireless communication system implementing Carrier Aggregation (CA) allows activation and deactivation of certain component carriers. Transmit power on an uplink component carrier being reactivated may be controlled by predetermining appropriate power control parameters to be used upon reactivation. The predetermined power control parameters may depend on a last known power control state of the deactivated component carrier or may be reset to apply an initial low power state. | 03-08-2012 |
20120069802 | RESOURCE MAPPING FOR MULTICARRIER OPERATION - An apparatus for wireless communication may allocate resources for multicarrier wireless communication. The apparatus may be enabled for cross-carrier signaling and semi-persistent scheduling on at least one carrier. Semi-persistent scheduling may be enabled by deriving a resource, such as a PHICH resource, for uplink HARQ operation using at least part of a demodulation reference signal field. The resource may be chose to reduce PHICH collision and may be based on a starting physical block of uplink data transmission. Cross-carrier signaling may be enabled by an information field, such as a carrier indicator field in the PDCCH, not enabled when cross-carrier signaling is not enabled. | 03-22-2012 |
20120076017 | APERIODIC CHANNEL STATE INFORMATION REQUEST IN WIRELESS COMMUNICATION - A method, computer program product, and apparatus are provided in which a request for a channel state information (CSI) report is received on a component carrier of a plurality of component carriers. The request indicates a set of component carriers of the plurality of component carriers for which to provide the CSI report. In addition, a CSI report including feedback for each of the indicated component carriers in the set of component carriers is transmitted. A method, computer program product, and apparatus are provided in which a request for a CSI report on a component carrier of a plurality of component carriers is transmitted. The request indicates a set of component carriers of the plurality of component carriers for which to receive the CSI report. In addition, a CSI report including feedback for each of the indicated component carriers in the set of component carriers is received. | 03-29-2012 |
20120076106 | MUTING SCHEMES FOR CHANNEL STATE INFORMATION REFERENCE SIGNAL AND SIGNALING THEREOF - A method of wireless communication is provided which includes establishing a time-frequency muting pattern including at least one data resource element (RE) and transmitting information indicating the time-frequency muting pattern to a user equipment. In some designs, the muting pattern is established by grouping a plurality of resource elements into muting groups such that the time-frequency muting pattern includes the muting groups. | 03-29-2012 |
20120082049 | DEVICES FOR DETERMINING A REFERENCE SUBFRAME AND DETERMINING A MODE - A wireless communication device for determining a reference subframe is described. The wireless communication device includes a processor and instructions stored in memory that is in electronic communication with the processor. The wireless communication device determines a reporting subframe n. The wireless communication device also determines a reference subframe n−n | 04-05-2012 |
20120082075 | METHOD AND APPARATUS FOR PUCCH AND PUSCH ENCODING - Wireless uplink communication is disclosed which includes dividing information bits into first and second sets of information bits. The first set of information bits is encoded into a first set of coded bits, while the second set of information bits is encoded into a second set of coded bits. The first and second sets of coded bits are rate matched into a defined number of bits generating first and second sets of rate-matched coded bits. The first and second sets of rate-matched coded bits are interleaved using various interleaving methods to generate an interleaved set of coded bits. | 04-05-2012 |
20120082079 | DISCONTINUOUS TRANSMISSION (DTX) SIGNALING IN UPLINK DATA CHANNEL - A method for discontinuous transmission (DTX) signaling in a physical uplink shared channel (PUSCH) of a wireless communication system includes puncturing at least a portion of a physical uplink shared channel (PUSCH) at a location that would collide with acknowledgement (ACK)/negative (ACK/NACK) feedback if ACK/NACK feedback is transmitted. The method also includes transmitting DTX symbols in the punctured portion of the PUSCH by a user equipment (UE). The method further includes detecting DTX symbols on the PUSCH by an evolved Node B (eNodeB), indicating the UE is operating according to a DTX signaling mode. | 04-05-2012 |
20120082101 | SEPARATE RESOURCE PARTITIONING MANAGEMENT FOR UPLINK CONTROL AND UPLINK DATA SIGNALS - Transmission management is provided with separate resource partitioning management for control and data transmissions. An evolved node B (eNB) generates separate resource partition schedules for the transmission stream, in which a first schedule is used for data transmissions while a second schedule is used for control signal transmissions. The two separate schemes may have different periodicities or different subframe type assignments that benefit either data or control transmissions or that allow for coordination of both data and control. The eNBs may broadcast the different schedules in regular system information messages, in which the UEs served by these eNBs will configure data and control signal transmissions according to the appropriate resource partition schedules. | 04-05-2012 |
20120082145 | HARQ ACK/NACK TRANSMISSION FOR MULTI-CARRIER OPERATION - Techniques for sending ACK/NACK information in a multi-carrier wireless communication network are disclosed. In one aspect, a plurality of ACK/NACK transmission techniques are selectively employed by a multi-carrier user equipment (UE) to reduce the number of bits of ACK/NACK information to send and/or increase the number of payload bits available for sending the ACK/NACK information. The ACK/NACK transmission techniques may include an orthogonal sequence reduction technique, a channel selection technique, a spatial bundling technique, a carrier bundling technique, and/or a subframe bundling technique. The ACK/NACK transmission techniques may be prioritized based on the number of carriers on which data transmissions are received, a payload size available for carrying ACK/NACK information, and/or other factors. The multi-carrier UE can utilize different ACK/NACK transmission techniques in connection with different subsets of its configured carriers. | 04-05-2012 |
20120087299 | REFERENCE SIGNAL CONFIGURATION AND RELAY DOWNLINK CONTROL CHANNEL - Aspects of the present disclosure relate to methods for allowing a relay base station to more efficiently decode relay control information transmitted from a donor base station. A relay base station may determine a configuration of resource elements used for transmission of reference signals and decode sets of resource elements based on the configuration of reference signals. According to aspects, a donor base station may transmit relay control information in a data portion of a subframe based on the configuration of reference signals transmitted by the donor base station. | 04-12-2012 |
20120093094 | ACKNOWLEDGEMENT BUNDLING IN A MIMO COMMUNICATION SYSTEM - A method of wireless communication comprises receiving a plurality of codewords and transmitting a downlink feedback message by spatially bundling acknowledgments for the received plurality of codewords. In some designs, an accompanying grant message is transmitted with the downlink feedback message. | 04-19-2012 |
20120099489 | SYSTEMS, APPARATUS AND METHODS FOR FACILITATING FREQUENCY REUSE FOR DOWNLINK CONTROL CHANNELS - Systems and methods for frequency reuse on downlink control channels (DLCCs) are provided. One method can include determining a first number of symbols to support transmission of control information on a DLCC, and configuring a second number of symbols for transmission of the control information on the DLCC, wherein the second number of symbols is greater than the first number of symbols. The method can also include assigning a number of DLCCs based on the second number of symbols, and transmitting control information over an assigned number of DLCCs to achieve an effective reuse factor less than one. Another method can include identifying fractions of bandwidth in a system having cells, and allocating at least one of the cells to at least one of the fractions of bandwidth in a system. Resource element groups allocated to the fractions of bandwidth can be coordinated across cells to provide frequency reuse. | 04-26-2012 |
20120106372 | METHOD AND APPARATUS FOR COMMUNICATION WITH SHORTENED SIGNAL FORMATS - Techniques for addressing high interference observed by a receiver in a wireless communication system are disclosed. The receiver may observe different interference power levels across a transmission symbol. In an aspect, the receiver applies different weights to different portions of the transmission symbol to account for fluctuation of interference power across the transmission symbol. In another aspect, a transmitter may send a transmission symbol such that a receiver can ignore a portion of a symbol period with high interference. In one design, the transmitter generates a transmission symbol including at least two copies of a signal component. The transmitter transmits at least one copy of the signal component in a portion of the symbol period in which the receiver does not observe high interference. The receiver processes the at least one copy of the signal component to recover data sent in the transmission symbol. | 05-03-2012 |
20120106373 | METHOD AND APPARATUS FOR SOUNDING ANTENNAS IN WIRELESS COMMUNICATION - Methods and apparatuses are provided that facilitate sounding antennas in wireless communication. In an aspect, a method for wireless communication includes determining at least one resource reserved for transmitting a demodulation reference signal and transmitting a sounding reference signal over the at least one resource. In another aspect, a method of wireless communication includes signaling a parameter related to sounding multiple antenna ports, receiving signals from a device over the multiple antenna ports, and estimating a channel related to the signals at least in part by removing a precoding from the signals. | 05-03-2012 |
20120113816 | REFERENCE SIGNAL RECEPTION AND CHANNEL STATE INFORMATION DETERMINATION FOR MULTIPLE NODES IN A WIRELESS COMMUNICATION NETWORK - Techniques for receiving reference signals from multiple nodes and determining channel state information (CSI) for the nodes are disclosed. A user equipment (UE) may determine and report CSI for the multiple nodes to support data transmission to the UE. The nodes may transmit reference signals based on different configurations. The configuration for each node may indicate when, where, and how the node transmits its reference signal. The UE may determine CSI for different nodes and/or different combinations of nodes based on the reference signals transmitted by these nodes as well as an indication of which subframes to use to determine each CSI reported by the UE. The UE may report different CSIs for different subframes and may receive data transmission sent by a single node or a combination of nodes based on the reported CSIs. | 05-10-2012 |
20120113849 | CQI-ONLY TRANSMISSION ON THE PUSCH - A method for transmitting a channel quality indicator-only feedback payload is described. A channel quality indicator scheduling message is received from a base station. A channel quality indicator-only feedback payload is generated. The channel quality indicator-only feedback payload is transmitted on a physical uplink shared channel. The method may be performed by a wireless communication device. | 05-10-2012 |
20120113869 | METHOD AND APPARATUS FOR IMPROVING UPLINK TRANSMISSION MODE CONFIGURATION - A method, an apparatus, and a computer program product for wireless communication are provided in which a first message to reconfigure an uplink transmission mode of a user equipment (UE) from a first uplink transmission mode to a second uplink transmission mode is transmitted. Further, a reconfiguration scheme to assure at least one of two or more second messages are recognizable by the UE during a transition period after transmission of the first message is implemented. In another example, a UE and eNB may be equipped to respectively transmit and receive a first message to reconfigure a SRS mode used by a UE. In such an aspect the first message may respectively indicate and be used to determine an SRS transmission port specified in a field capable of indicating a number of SRS transmission ports that is greater than a number of physical UE antenna ports. | 05-10-2012 |
20120113898 | USING PRECODING VECTOR SWITCHING IN UPLINK CONTROL CHANNEL - Methods and apparatuses are provided that include using orthogonal precoding vectors to precode signals for transmission in a given subframe. Transmissions in a first slot of the subframe can be precoded with a first precoding vector, and transmissions in a second slot of the subframe can be precoded with a second precoding vector, which can be orthogonal to the first precoding vector. The precoding vectors can be selected using precoding vector switching or a similar mechanism. Thus, diversity is provided for transmissions within a given subframe to improve reliability of receiving the transmissions. In addition, other precoding vectors can be used to precode signals for transmissions in a subsequent subframe. | 05-10-2012 |
20120113917 | INTERACTION OF PDSCH RESOURCE MAPPING, CSI-RS, AND MUTING - Certain aspects of the present disclosure provide techniques that may help resolve ambiguities between a base station and a user equipment (UE) regarding the use or resource elements (REs) reserved for special purposes, such as PDSCH muting and/or CSI-RS. | 05-10-2012 |
20120114014 | USING PRECODING VECTOR SWITCHING IN UPLINK SHARED CHANNEL - Methods and apparatuses are provided that include providing transmit diversity for data channel transmissions. Different precoding vectors can be used over different slots of a given subframes to precode corresponding signals. The precoding vectors, in one example, can be orthogonal. In addition, using the different precoding vectors can be determined based on a user equipment receiving an indicator from a base station receiving the data channel transmissions of whether to use frequency hopping over the slots. Moreover, precoding vectors used to precode data channel transmissions can additionally or alternatively vary across subframes. | 05-10-2012 |
20120115531 | TRANSMISSION POWER DEPENDENT IMBALANCE COMPENSATION FOR MULTI-ANTENNA SYSTEMS - Methods and apparatuses for wireless communication are provided. In an aspect, Transmissions are received from multiple antennas of a user equipment and a differential power control message that is based on an imbalance of transmitted power from the multiple antennas is transmitted. In another aspect, a differential power control message that is based on an imbalance of transmitted power from multiple antennas of a user equipment is received and based on the message, the imbalance is compensated for by varying a transmit power from one or more of the multiple antennas. | 05-10-2012 |
20120115534 | DYNAMIC UPLINK POWER CONTROL - Power adjustment in the user equipment (UE) includes adjusting the transmission power level for each of multiple transport blocks based on the spectral efficiency associated with the transport block. The UE receives a scheduled transport format parameter for each of multiple transport blocks to be transmitted. Based on those scheduled transport format parameters, the UE determines a transmit power level adjustment for each transport block. The UE will adjust the power according to the determined transmit power level adjustment and transmit each transport block using the adjusted power level. | 05-10-2012 |
20120120882 | METHODS AND APPARATUSES FOR DOWNLINK CHANNEL RESOURCE ASSIGNMENT - Certain aspects of the present disclosure provide techniques for determining resources for transmission of acknowledgement messages to a user equipment (UE). The techniques involve receiving a plurality of codewords from the UE via an uplink component carrier, and determining at least first and second index pairs identifying resources of a downlink channel to be used for transmitting acknowledgement messages for the received codewords. The first index pair is determined based on a first set of parameters, and the second index pair is determined based on the first set of parameters and a second set of one or more parameters. At least one of the parameters in the second set is a fixed value. | 05-17-2012 |
20120120924 | SYSTEM, APPARATUS AND METHOD FOR DOWNLINK AND UPLINK GRANT DESIGN IN WIRELESS COMMUNICATION SYSTEMS - In accordance with aspects of the disclosure, a method, apparatus, and computer program product are provided for wireless communication. The method, apparatus, and computer program product may be configured to provide at least one control channel for downlink grant information, provide at least one other control channel for uplink grant information, and adjust time apportioned for the downlink and uplink grant information in the control channels. | 05-17-2012 |
20120127931 | APPARATUS AND METHOD FOR RANDOM ACCESS CHANNEL POWER PRIORITIZATION - A method, apparatus, and computer program product for wireless communication are provided in which a transmission power is prioritized between an access channel and a second channel. Additionally, the access channel and the second channel are transmitted simultaneously. Each of the access channel and the second channel are transmitted at a transmission power determined based on the priority. Further, a method, apparatus, and computer program product for wireless communication are provided in which information is received regarding first resources to use for transmitting an access channel with an acknowledgment and second resources for transmitting the access channel with a negative acknowledgment. Further, the access channel is transmitted on the first or second resources. | 05-24-2012 |
20120134273 | REFERENCE SIGNAL PATTERNS - Certain aspects of the present disclosure provide techniques for allocating resources for use in transmitting reference signals (RSs). According to certain aspects, a large set of enumerated possible CSI-RS resources (“CSI-RS patterns”) may be defined and a base station may select a CSI-RS pattern from a subset of the available patterns, with the subset determined by a transmission configuration. | 05-31-2012 |
20120134305 | HYBRID AUTOMATIC REPEAT REQUEST FEEDBACK TRANSMISSION IN A MULTI COMPONENT-CARRIER COMMUNICATION SYSTEM - Methods, systems, devices, and computer program products are described which facilitate the transmission and reception of acknowledgment/negative acknowledgment (ACK/NACK) feedback associated with downlink data transmissions in a multi-carrier wireless communication system. Scheduling request resources may be utilized to enable the transmission of ACK/NACK feedback for the multiple component carriers when a positive scheduling request is present and the techniques described may be utilized to improve the efficiency of control channel signaling in different system configurations. | 05-31-2012 |
20120155362 | Rate Matching For Data And Control Channels In Wireless Communication Systems - In co-channel heterogeneous networks, subframes may be partitioned between several evolved Node Bs (eNBs) including eNBs of different power classes. Lower power eNBs may have a reduced range due to interference from neighboring higher power eNBs. Rate matching on the UE allows the UE, during communication with a low power eNB, to avoid transmitting on Resource Elements (REs) which experience interference from common resource signals of an interfering base station. | 06-21-2012 |
20120182946 | RATE MATCHING FOR COORDINATED MULTIPOINT TRANSMISSION SCHEMES - Certain aspects of the present disclosure relate to techniques for determining resource elements REs used for Coordinated Multipoint (CoMP) transmission schemes. The techniques generally include determining, by a User Equipment (UE), a set of data REs used for Coordinated Multipoint (CoMP) operation. The determination is based on a CoMP scheme and data REs available to particular base stations involved in the CoMP operation. The technique further includes processing data received via the CoMP operation on the determined set of data REs. | 07-19-2012 |
20120188950 | METHOD AND APPARATUS FOR BUNDLING RESOURCE BLOCKS IN WIRELESS COMMUNICATION - Methods and apparatuses are provided for bundling resource blocks (RB) for varying bandwidth scenarios in wireless communication. Where multiple access points form a coordinated multiple point (COMP) set for a device. the access points may be configured to use a common RB bundling size for precoding transmissions to the device. In another aspect, where a device is allocated a bandwidth and a bandwidth extension, a RB bundling size may be determined for the bandwidth and bandwidth extension, jointly or individually. The RB bundling size may be determined based on the bandwidth or on the bandwidth and the bandwidth extension. | 07-26-2012 |
20120207043 | METHOD AND APPARATUS FOR ENABLING CHANNEL AND INTERFERENCE ESTIMATIONS IN MACRO/RRH SYSTEM - Aspects disclosed herein relate to channel and interference estimations in a multiple transmission point environment including an eNB and RRHs. In the disclosed aspects, one or more transmission points can signal to a UE to measure channel state conditions based on a first and a second resource pattern. The UE may receive the signaling and perform interference estimation based at least in part on the first resource pattern, and channel estimation based at least in part on the second resource pattern. The UE may generate a channel state report based on the interference and channel estimations, and transmit the channel state report to a transmission point. The eNB may employ the received channel state report in scheduling one or more resources for use by the UE, and may select or adjust network traffic on the first and the second resource pattern, to affect the resulting channel and interference estimation. | 08-16-2012 |
20120207105 | COOPERATION AND OPERATION OF MACRO NODE AND REMOTE RADIO HEAD DEPLOYMENTS IN HETEROGENEOUS NETWORKS - A method, an apparatus, and a computer program product for wireless communication are provided for separating control transmissions and data transmissions within the coverage area of a plurality of transmission/reception points or points that are geographically displaced, the plurality of points comprising a macro node and a plurality of remote radio heads (RRHs) coupled to the macro node. Separating control transmissions and data transmissions in the macro node/RRH configuration may allow UEs to be associated with one set of transmission points for data transmissions and the same set or a different set of transmission points for common control signaling. Separating control transmissions and data transmissions may also allow for faster reconfiguration of antenna ports used for UE data transmission compared with reconfiguration via a handover process. | 08-16-2012 |
20120208541 | MOBILITY PROCEDURES IN WIRELESS NETWORKS WITH DISTRIBUTED REMOTE RADIO HEADS - Wireless networks may include remote radio heads (RRHs) for extending the coverage of a macro cell. The macro cell may be connected to the RRHs, for example, by optical fiber, and there may be negligible latency between the macro cell and the RRHs. As a user equipment (UE) moves within the macro cell, or between other macro cells, mobility procedures followed by the UE may vary based on the release of the UE (e.g., Rel-8/9, Rel-10, or Rel-11 and beyond). The macro cell may handle all the scheduling within the cell, for itself and the RRHs. | 08-16-2012 |
20120208547 | METHOD AND APPARATUS FOR ENABLING CHANNEL AND INTERFERENCE ESTIMATIONS IN MACRO/RRH SYSTEM - Aspects disclosed herein relate to channel and interference estimations in a coordinated multi-point (CoMP) environment. In the disclosed aspects, an eNB may be equipped to signal an identifier indicating a plurality of resource patterns, each associated with a resource pattern group, and each including a first resource element pattern for channel estimation and a second resource element pattern for interference estimation. The UE may be equipped to receive the signaling and perform channel estimation based at least in part on the first resource clement pattern, and interference estimation based at least in part on the second resource pattern generate at least one channel state report based on the channel and interference estimations, and transmit at least one channel state report to an eNB. The eNB may determine one or more resources for use by the UE based on the at least one received channel state report. | 08-16-2012 |
20120213154 | UPLINK TRANSMIT ANTENNA SELECTION IN CARRIER AGGREGATION - An uplink antenna selection method where a base station transmits first and second control information to a user equipment. The first control information includes instructions for configuring the user equipment with closed-loop transmit antenna selection on one of a plurality of component carriers, and the second control information includes instructions for configuring the UE with open-loop transmit antenna selection on at least one other of the plurality of the component carriers. Also, the UE may transmit an indication of its capability for transmission antenna switching per component carrier. Further, the UE may perform steps to resolve inconsistent antenna selection triggers received from the base station. | 08-23-2012 |
20120236771 | UPLINK CONTROL CHANNEL RESOURCE MAPPING FOR CARRIER AGGREGATION - In a multi-carrier wireless communication system, component carrier configuration and reconfiguration uses uplink control channel resource mapping with fallback configurations to maintain alignment between a user equipment and a base station during reconfiguration. | 09-20-2012 |
20120257524 | CSI REPORTING FOR MULTIPLE CARRIERS WITH DIFFERENT SYSTEM CONFIGURATIONS - Techniques to support periodic reporting of channel state information (CSI) for multiple component carriers (CCs) with different system configurations are disclosed. A user equipment (UE) is configured with multiple CCs for carrier aggregation. Each CC is associated with a particular system configuration, which indicates whether FDD or TDD is utilized and, if TDD is utilized, a particular uplink-downlink configuration for the CC. Each CC is associated with a set of subframes available to send CSI on that CC, which is determined based on the system configuration of the CC. The multiple CCs configured for the UE include at least two CCs associated with different system configurations and different sets of subframes available to send CSI. The UE sends CSI for a first CC on a second CC based on a set of subframes available to send CSI on the second CC. | 10-11-2012 |
20120257552 | TRANSMISSION OF CONTROL INFORMATION FOR FDD-TDD CARRIER AGGREGATION - Techniques for transmitting control information to support communication on multiple component carriers (CCs) are disclosed. A user equipment (UE) may be configured for operation on multiple CCs. These CCs may be associated with control messages having different definitions. For example, a control message for a CC configured for frequency division duplex (FDD) may have a different definition than a control message for a CC configured for time division duplex (TDD). A base station may send first control information for a first CC based on a definition of a control message for a second CC, instead of a definition of a control message for the first CC. The control message for the second CC may be selected for use to send the first control information based on various designs. | 10-11-2012 |
20120257582 | APERIODIC SRS FOR CARRIER AGGREGATION - A method of wireless communication includes receiving overlapping information triggering aperiodic sounding reference signal (SRS) transmission. The method also includes processing the overlapping information in accordance with the received triggering information. The overlapping information can be comprises consistent configuration information for the aperiodic SRS transmission, in which case the processing includes transmitting an aperiodic SRS in accordance with the configuration information. When the overlapping information has dissimilar configurations for the aperiodic SRS transmission; the processing includes treating the overlapping information as an error event. The overlapping information can be a trigger received in an uplink grant and a trigger received in a downlink grant. The wireless system can be a multicarrier system including multiple component carriers. | 10-11-2012 |
20120263121 | CONTROL CHANNEL RESOURCES FOR MULTI-BIT ACK/NAK - A method of wireless communication includes receiving an upper layer configuration of multiple sets of ACK/NAK resources for uplink transmission. The receives resources correspond to at least one secondary downlink component carrier in a multicarrier configuration. The method also includes receiving a physical layer indicator of ACK/NAK resources in the sets. | 10-18-2012 |
20120263124 | RESOURCE ASSIGNMENTS FOR UPLINK CONTROL CHANNEL - A wireless communication method includes allocating physical uplink control channel (PUCCH) data in first slot to a first orthogonal cover code (OCC). The method also includes allocating PUCCH data in a second slot of the same subframe to a different orthogonal cover code (OCC). Another method includes mapping PUCCH resources to physical resource blocks based on a user equipment (UE) specific signaling parameter (e.g., a resource index) and a number of symbols in a slot of a subframe. | 10-18-2012 |
20120275398 | SYSTEM AND METHOD FOR MANAGING INVALID REFERENCE SUBFRAMES FOR CHANNEL STATE INFORMATION FEEDBACK - A method transmits long term evolution (LTE) measurement reports on an uplink. The method manages invalid reference subframes in a multicarrier configuration. The managing can be implemented by transmitting measurement reports for component carriers with valid reference subframes; and omitting measurement reports for at least one component carrier with an invalid reference subframe. | 11-01-2012 |
20120287828 | ACKNOWLEDGEMENT / NEGATIVE ACKNOWLEDGEMENT FEEDBACK FOR TDD - Bits for acknowledgement (ACK) and/or negative acknowledgement (NAK) may be allocated based on whether a special subframe configuration in a TDD configuration permits downlink transmission. For carrier aggregation, ACK/NAK bits may be allocated only to special subframes in component carriers (CCs) which permit downlink transmission. Also, for example, ACK/NAK bits may be allocated to all CC special subframes if a single CC is configured to allow downlink transmission on one of its special subframes. ACK/NAK bits may also be allocated to all special subframes. | 11-15-2012 |
20120294204 | METHOD AND APPARATUS FOR IMPROVING ACKNOWLEDGEMENT/NEGATIVE ACKNOWLEDGEMENT FEEDBACK - A method, apparatus, and computer program product for wireless communication are provided to receive a downlink grant including a transmission power control (TPC) command and a downlink assignment index (DAI) for an uplink subframe, determine that a value for at least one of the TPC commands is an ACK/NACK resource indicator for an uplink control channel resource based on a value of the DAI, and transmit one or more ACK/NACK bits using the uplink control channel resource. In another example, an eNB may be equipped to transmit a downlink grant including TPC command and DAI for an uplink subframe, wherein the DAI is greater than 1 and the TPC command is replaced with an ACK/NACK resource indicator, and receive a signal including uplink control channel information, where ACK/NACK feedback for one or more downlink subframes associated with the uplink subframe are included in a resource indicated by the resource indicator. | 11-22-2012 |
20120300641 | CHANNEL STATE INFORMATION FEEDBACK FOR CARRIER AGGREGATION WITH FLEXIBLE CARRIER CONFIGURATIONS - Techniques for reporting channel state information (CSI) are disclosed. A user equipment (UE) may be configured for operation on multiple carriers with different configurations, e.g., FDD and TDD carriers and/or carriers with different uplink-downlink configurations. The multiple carriers may have different subframes for making measurements for CSI and/or different subframes for sending CSI. In response to a CSI request, the UE may determine at least one reference subframe to use for determining CSI for the multiple carriers. The reference subframe may be common to the plurality of carriers and may, for example, be based the subframe in which the CSI request in sent. Alternatively, the reference subframe may be different for different carriers such as when it is based on different HARQ timelines applicable for the different carriers. The UE may determine the CSI for the multiple carriers based on the reference subframe(s) and may report the CSI. | 11-29-2012 |
20130010659 | SOUNDING REFERENCE SIGNALS IN ASYMMETRIC CARRIER AGGREGATION - Sounding reference signal (SRS) transmission is disclosed for asymmetric carrier aggregation, where the carrier aggregation occurs using multiple component carriers that include both paired and at least one non-paired component carrier. A user equipment (UE) determines whether to transmit SRS over at least one of the non-paired component carriers. The UE transmits the SRS over the non-paired component carrier when the determination is made. The UE maintains a single component carrier transmission at a time with a single carrier waveform SRS transmission by transmitting the SRS on a different component carrier at different subframes. | 01-10-2013 |
20130016692 | DOWNLINK CONTROL WITH CONTROL-LESS SUBFRAMES - In a wireless communications system wherein control-less subframes share a common carrier with subframes that include control signaling, a method performed by a base station may include receiving a first indication from a network entity to maintain a designated set of subframes on a common carrier devoid of designated downlink control signals. The method may further include providing a second indication in a wireless transmission to a mobile entity, the second indication enabling identification of subframes in the designated set (i.e., the control-less subframes) by the mobile entity. In turn, identification of control-less subframes by the mobile entity prior to decoding the subframes may enable a more efficient control of blind decoding operations at the mobile entity and reduce blind decoding operations required for the mobile entity to decode downlink control information. | 01-17-2013 |
20130016705 | ENHANCING SOUNDING REFERENCE SIGNALS (SRS) - A method for enhancing a sounding reference signal (SRS) in a non-root wireless communication device is disclosed. The method determines that all SRS transmissions for the wireless communication device are to occur in an uplink pilot time slot (UpPTS) portion of a transition subframe. The method also determines whether available uplink bandwidth for the UpPTS portion is greater than available uplink bandwidth for a normal uplink subframe. A current SRS is transmitted using the available uplink bandwidth for UpPTS portion when the available uplink bandwidth for the UpPTS portion is greater than available uplink bandwidth for the normal uplink subframe. | 01-17-2013 |
20130021926 | FEEDBACK REPORTING BASED ON CHANNEL STATE INFORMATION REFERENCE SIGNAL (CSI-RS) GROUPS - In macro/RRH setups, channel state information reference signals (CSI-RS) and demodulation reference signals (DM-RS) may be used to decouple control and data transmission. Data transmission (e.g. for LTE Rel 10 and beyond) may be based on CSI-RS and DM-RS, while control may be received from a different set of cells or TxPs via CRS. Certain aspects of the present disclosure introduce a reporting framework, in which configuration of data-serving cells/TxPs may be carried out based on CSI-RS. In certain aspects, a new concept of CSI-RS groups, i.e., a set of CSI-RS ports that a UE considers as one group for precoding matrix indicator (PMI)/channel quality indicator (CQI)/rank indicator (RI) reporting, may be defined. | 01-24-2013 |
20130021954 | ENABLING HALF-DUPLEX OPERATION - Half-duplex (HD) operations enable low cost implementations of LTE terminals. Traditionally, HD operations may be linked to a particular frequency band which may not allow a mix of full-duplex (FD) and HD terminals in the same frequency band. Therefore, certain aspects of the present disclosure provide techniques for enabling coexistence, in a given frequency band, of HD and FD terminals, by introducing frequency bands designated for HD operation and overlapping existing frequency bands designated for FD operation. | 01-24-2013 |
20130028117 | METHOD AND APPARATUS FOR AGGREGATING CARRIERS OF MULTIPLE RADIO ACCESS TECHNOLOGIES - The described aspects include methods and apparatus for communicating control information in a carrier aggregation configuration that uses multiple radio access technologies (RAT). A first resource assignment related to a first carrier corresponding to a first RAT can be received, as well as, a second resource assignment related to a second carrier corresponding to a second RAT. The first carrier and the second carrier are aggregated for communicating data in a wireless network. In addition, resources can be determined for communicating first RAT control data for the first RAT over an uplink carrier based at least in part on the first resource assignment. Second RAT control data can then also be communicated in containers and/or using timing for control data of the first RAT over at least a portion of the resources. | 01-31-2013 |
20130028149 | METHOD AND APPARATUS FOR SIGNALING CONTROL DATA OF AGGREGATED CARRIERS - Techniques are provided for communicating control information for aggregated carriers. For example, a method includes receiving one or more assignments for a plurality of aggregated carriers. For example, the at least one of the plurality of aggregated carriers is a time division duplexing (TDD) carrier having a different subframe configuration than at least another one of the plurality of aggregated carriers. The method may include communicating control information for the plurality of aggregated carriers over one of the plurality of aggregated carriers. | 01-31-2013 |
20130028182 | IMPLICITLY LINKING APERIODIC CHANNEL STATE INFORMATION (A-CSI) REPORTS TO CSI-REFERENCE SIGNAL (CSI-RS) RESOURCES - Certain aspects of the present disclosure provide techniques for implicitly linking aperiodic channel state information (A-CSI) reports to CSI-reference signal (CSI-RS) resources. In an aspect, the UE may be instructed to report on specific CSI-RS resource(s) via explicit signaling in the UE grant. Other aspects disclose techniques for implicit CSI-RS resource selection by the UE that require fewer signaling resources. Instead of explicitly signaling CSI-RS resources to the UE, the UE may implicitly select CSI-RS resource for CSI feedback reporting based on information known to the UE, e.g. a subframe on which a reporting request is received. This may reduce the impact of the additional signaling in the UE grant. | 01-31-2013 |
20130028205 | TRANSMISSION OF CONTROL INFORMATION IN A WIRELESS NETWORK WITH CARRIER AGGREGATION - Techniques for sending control information to support operation on multiple component carriers (CCs) are disclosed. A user equipment (UE) may be configured with multiple CCs for carrier aggregation. The multiple CCs may be associated with different uplink-downlink configurations and may have different downlink subframes and uplink subframes. In one aspect, uplink control information (UCI) for a secondary CC (SCC) may be sent on a primary CC (PCC) based on a UCI transmission timeline for the PCC (and not based on a UCI transmission timeline for the SCC). For example, a downlink grant for the SCC may be sent based on a downlink grant transmission timeline for the PCC. In another aspect, uplink grants for an SCC may be sent on the PCC based on an uplink grant transmission timeline for the PCC (and not based on an uplink grant transmission timeline for the SCC). | 01-31-2013 |
20130034028 | ALLOCATING PHYSICAL HYBRID ARQ INDICATOR CHANNEL (PHICH) RESOURCES - Certain aspects of the present disclosure relate to techniques for allocating resources for Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH). | 02-07-2013 |
20130039292 | MITIGATION OF LOST RESOURCE ALLOCATION SYNCHRONIZATION BETWEEN A USER EQUIPMENT (UE) AND AN EVOLVED NODE B (eNodeB) - A method for mitigation of lost resource allocation synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a Hybrid Automatic Repeat Request (HARQ) transmission and/or retransmission process is described. The method includes determining whether resource allocation is out of synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a hybrid automatic repeat request (HARQ) transmission and/or retransmission process. The method further includes mitigating a loss of resource allocation synchronization between the UE and the eNodeB during the HARQ transmission and/or retransmission process. | 02-14-2013 |
20130044654 | METHOD AND APPARATUS FOR AGGREGATING CARRIERS OF A BACKHAUL CONNECTION - The described aspects include methods and apparatus for aggregating carriers over a backhaul link between a relay and an evolved Node B (eNB). A first set of subframes of at least a first carrier of a plurality of carriers configured for communicating with an eNB over a backhaul link can be determined. A second set of subframes of at least a second carrier of the plurality of carriers configured for backhaul link communications is also determined, wherein the second set of subframes are different from the first set of subframes. Data received over a plurality of access link carriers can then be communicated to the eNB over the first carrier and the second carrier based at least on the first set of subframes and the second set of subframes. | 02-21-2013 |
20130051322 | MULTI-POINT PUCCH ATTACHMENT - Various aspects of the present disclosure are directed to periodic over-the-air channel state information (CSI) reporting to serving cells and one or more non-serving cells via a control channel multi-point attachment. The channel state information report may be transmitted based on information indicating how to transmit the channel state information report to the non-serving cell. The information indicating how to transmit the channel state information report may be provided by the serving eNodeB. The information may include a periodicity, offset parameters, timing advance commands, power control commands, and/or an aperiodic report request. | 02-28-2013 |
20130064119 | Narrow Bandwidth Operation in LTE - A method of wireless communication provides narrow bandwidth operation within a wider LTE system bandwidth. Wideband information is transmitted to a first set of user equipments (UEs). Also, narrowband information is transmitted to a second set of UEs. The second set of UEs operate in a narrower bandwidth than the first set of UEs. | 03-14-2013 |
20130064165 | SUPPORT OF MULTIPLE TIMING ADVANCE GROUPS FOR USER EQUIPMENT IN CARRIER AGGREGATION IN LTE - Methods, systems, and devices are described to support multiple timing advance groups for multi-carrier user equipment. Some embodiments provide for utilizing timing advance group synchronization information across multiple timing advance groups. Some embodiments provide support for performing random access procedures in relation to timing advance groups that may not include a primary component carrier. Some embodiments utilize timing advance group indexes to enable cross-carrier random access procedure management. Other embodiments support parallel random access procedures across multiple timing advance groups. Some embodiments provide for a reference downlink component carrier for timing within a timing advance group. | 03-14-2013 |
20130083704 | HALF-DUPLEX/FULL-DUPLEX OPERATION FOR TDD CARRIER AGGREGATION - Aspects of the present disclosure relate to methods for communicating using TDD and carrier aggregation. | 04-04-2013 |
20130083710 | HALF-DUPLEX OPERATION FOR LOW COST WIRELESS DEVICES - Certain aspects of the present disclosure provide techniques for enabling half-duplex (HD) operations between one or more user equipments (UEs) and one or more base stations. | 04-04-2013 |
20130083730 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION POWER CONTROL AND TIMING IN COORDINATED MULTIPOINT TRANSMISSION SCHEMES - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus of a first cell communicates with a second cell in relation to a coordinated multipoint (CoMP) transmission of control information by the second cell and data by the first cell to a user equipment (UE) in a range expanded region of the first cell, determines a desired transmission power level for an uplink transmission to the first cell by the UE, and provides the desired transmission power level for the uplink transmission to the second cell. | 04-04-2013 |
20130083731 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION POWER CONTROL AND TIMING IN COORDINATED MULTIPOINT TRANSMISSION SCHEMES - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus of a first cell communicates with a second cell in relation to a coordinated multipoint (CoMP) transmission of control information by the first cell and data by the second cell to a user equipment (UE) in a range expanded region of the second cell, receives a desired transmission power level for the UE from the second cell, generates control information based on the desired transmission power level, and transmits the control information to the UE. | 04-04-2013 |
20130083749 | Random Access Channel Design for Narrow Bandwidth Operation in a Wide Bandwidth System - A method of wireless communication includes a random access channel configuration for narrow bandwidth operations within a wider LTE system bandwidth. A first random access channel (RACH) configuration is broadcast for a regular device. A second RACH configuration is broadcast for a narrow bandwidth device. The narrow bandwidth device operates in a narrower bandwidth than the regular device. | 04-04-2013 |
20130083754 | UPLINK RESOURCE MANAGEMENT UNDER COORDINATED MULTIPOINT TRANSMISSION - Management and distribution of PUCCH resources between first and second eNBs in a CoMP system is disclosed, in which the control and data transmission for a given UE is decoupled. The decoupling of the control and data transmissions allows the first eNB to transmit control information while the second eNB or remote radio head (RRH) transmits data. In such systems, the first eNB communicates a dynamic PUCCH parameter to UEs served in a decoupled manner. The dynamic PUCCH parameter allows the UE to determine uplink communications for the dynamic PUCCH region transmitted to the second eNB in such a position that will not overlap or cause interference with the dynamic PUCCH regions reserved by the first eNB. | 04-04-2013 |
20130084913 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION POWER CONTROL AND TIMING IN COORDINATED MULTIPOINT TRANSMISSION SCHEMES - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives control information from a first cell, generates an uplink transmission to a second cell based in part on the received control information from the first cell, receives a transmission power setting based on the uplink transmission to the second cell, and transmits in uplink using the transmission power to the second cell. | 04-04-2013 |
20130089048 | EXTENSION CARRIER AS A BANDWIDTH EXTENSION - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives extended bandwidth information indicating availability of an extended bandwidth. The extended bandwidth includes a base carrier and an extension carrier within a legacy guard band of the base carrier. The apparatus receives data on a downlink in the extension carrier based on the extended bandwidth information. | 04-11-2013 |
20130114419 | RESOURCE MANAGEMENT FOR ENHANCED PDCCH - Certain aspects of the present disclosure provide techniques for managing resources utilized for enhanced physical downlink control channel (PDCCH) transmissions. | 05-09-2013 |
20130114455 | USER EQUIPMENT, BASE STATIONS, AND METHODS ALLOWING FOR HANDLING OF COLLIDING CHANNEL STATE INFORMATION REPORTS - Collision handling of channel state information (CSI) reports is described for enhanced inter-cell interference coordination (eICIC), coordinated multipoint transmission (CoMP), and/or carrier aggregation (CA). Various aspects include prioritization schemes to resolve collisions between different CSI reporting sets in relation to the same component carrier (CC) used with transmission. Multiple stages of prioritization may identify CSI for a report based on various criteria. Tie breaker criteria may be defined for priority among CSI reports that changes for different subframes. In other aspects, PUSCH is utilized to transmit CSI for prioritized reporting sets in a subframe. In yet other aspects, if parallel PUCCH is supported, colliding CSI may be handled on a per PUCCH basis. Other aspects may allow for prioritizing periodic CSI within each of multiple CCs, and then prioritizing over different CCs to handle an interaction of CSI reports for CA, eICIC and/or CoMP. | 05-09-2013 |
20130114495 | Physical Channel Characteristics for e-PDCCH in LTE - Certain aspects of the present disclosure provide techniques for processing and transmitting enhanced physical downlink control channel (PDCCH) transmissions. | 05-09-2013 |
20130114529 | SEARCH SPACE DESIGN FOR E-PDCCH IN WIRELESS COMMUNICATION NETWORKS - An enhanced physical downlink control channel (e-PDCCH) may provide carrier aggregation (CA) enhancements, help support new carriers which may not be backwards compatible, reduce control channel capacity limitations of coordinated multipoint (CoMP) transmissions, and enhance DL MIMO. In wireless communication networks, such as Long Term Evolution (LTE), user equipments (UEs) may monitor both a common search space and a UE-specific search space in a control region. A search space may comprise a set of channel control element (CCE) locations where a UE may find its PDCCHs. One or more CCEs are used to transmit each PDCCH. Certain aspects provide methods and apparatus for determining a search space comprising a subset of CCEs located on a band edge of available frequency resources, and performing a search of the search space to decode at least one PDCCH. | 05-09-2013 |
20130114530 | METHOD AND APPARATUS FOR MANAGING RETRANSMISSION RESOURCES - A method, a computer program product, and an apparatus for determining retransmission feedback resources are provided. An apparatus receives a downlink resource assignment over a control channel and obtains an offset related to a region for retransmission feedback resources. The offset is determined based on a type of the control channel. The apparatus determines resources for communicating retransmission feedback for communications received over the downlink resource assignment based on an index of a resource related to the downlink resource assignment and the offset. The apparatus transmits retransmission feedback for the communications over the resources. | 05-09-2013 |
20130114565 | STRUCTURE OF ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (e-PDCCH) IN LONG TERM EVOLUTION (LTE) - Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to defining a structure of and enhanced physical downlink control channel (e-PDCCH). Certain aspects provide methods and apparatus for determining a search space in which a base station (eNodeB) may transmit an enhanced physical downlink control channel (e-PDCCH), wherein the search space comprises one or more fractional portions of frequency-time resources of a physical resource block (PRB) pair, and attempting to decode the e-PDCCH based on the determined search space. | 05-09-2013 |
20130121168 | Blindly Decoding Interfering Cell PDCCH to Acquire Interfering Cell PDSCH Transmission Information - Certain aspects of the present disclosure relate to a technique for blindly decoding interfering cell Physical Downlink Control Channel (PDCCH) to acquire interfering cell Physical Downlink Shared Channel (PDSCH) transmission information. A UE may determine, for one or more aggregation levels, sets of CCEs that potentially include the PDCCH, based on available CCEs for each aggregation level and identify a set of decoding candidates based on the determination. Once the decoding candidates are decoded, the UE may perform an error correcting procedure on decoded candidates and prune out unlikely candidates. Likely decoded candidates may be further pruned based on comparison of CRC calculated using information bits only and possible Radio Network Temporary Identifiers (RNTIs). The UE may then interpret content of the PDCCH of the interfering cell based on surviving candidates. The UE may then use the interpreted PDCCH information to determine PDSCH information. | 05-16-2013 |
20130121216 | METHOD AND APPARATUS FOR SOFT BUFFER MANAGEMENT FOR HARQ OPERATION - Certain aspects of the present disclosure propose a method and an apparatus for calculating maximum number of hybrid automatic repeat request (HARQ) processes per component carrier and/or number of soft buffer bits for HARQ operation by taking into account the subframes which are available for a physical downlink shared channel (PDSCH) for a user equipment (UE) or a group of UEs. In the proposed method, the subframes that are not available for a PDSCH for at least a UE (either by specification or by configuration) may not be considered in calculating the number of soft buffer bits. | 05-16-2013 |
20130121270 | METHOD AND APPARATUS FOR SENDING CHANNEL STATE INFORMATION USING SUBFRAME - DEPENDENT CONTROL CHANNEL FORMAT - Techniques for reporting channel state information (CSI) for multiple cells (e.g., carriers) using multiple control channel formats are disclosed. A user equipment (UE) may be configured for operation on a plurality of cells. The UE may be configured to periodically report CSI for the plurality of cells and may also report CSI whenever requested. The UE may be configured with a plurality of control channel formats for sending CSI and possibly other control information in different subframes. The plurality of control channel formats may be associated with at least two different capacities. The UE may report CSI for the plurality of cells in the plurality of subframes based on the plurality of control channel formats. | 05-16-2013 |
20130121271 | SYSTEM AND METHOD FOR MANAGING SIMULTANEOUS UPLINK SIGNAL TRANSMISSIONS IN CARRIER AGGREGATION SYSTEMS - Systems and methods for managing the transmission of multiple signals on one or more uplink (UL) channels using carrier aggregation in LTE-A systems. A UE simultaneously transmits signals such as ACK/NACK and periodic CSI using one or more uplink channels, such as a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH), by increasing the resources used to transmit at least one of those signals. According to one aspect, a UE simultaneously transmits ACK/NACK signals and periodic CSI signals by multiplexing those signals on the PUSCH. Certain aspects avoid frequently dropped periodic CSI signals and provide mechanisms to ensure that ACK/NACK signals are transmitted. | 05-16-2013 |
20130121274 | DOWNLINK CONTROL INFORMATION (DCI) DESIGN FOR LOW COST DEVICES - Certain aspects of the present disclosure relate to techniques for reducing the decoding complexity for low cost devices (e.g., low cost UEs). One technique may include simplifying the PDCCH format. This may include generating a compact DCI format for transmitting DCI to a low cost device. The compact DCI format may correspond to at least one standard DCI format used by a regular UE and may comprise a reduced number of bits when compared to the standard DCI format. Another technique may include reducing the number of blind decodes. This technique may include selecting a set of resources for transmitting DCI from a limited set of decoding candidates, such that a receiving low cost device need only perform blind decodes for the limited set of decoding candidates. | 05-16-2013 |
20130128759 | METHOD AND APPARATUS FOR COMPUTING AND REPORTING CHANNEL QUALITY INDICATION (CQI) - Techniques for computing and reporting channel quality indication (CQI) are described. In an aspect, a plurality of CQI computation methods may be supported, and each CQI computation method may indicate how CQI should be computed. One CQI computation method may be selected for use. CQI may then be computed and reported in accordance with the selected CQI computation method. In an exemplary design, a user equipment (UE) may obtain a selected method for computing CQI, which may be chosen based on the UE capability and/or other factors. The selected method may specify (i) CQI computation for a specific codeword among a plurality of codewords or (ii) CQI computation by averaging signal quality across a plurality of layers used for transmission. The UE may compute CQI in accordance with the selected method, send the CQI to a base station, and receive data sent by the base station based on the CQI. | 05-23-2013 |
20130128838 | DOWNLINK CONTROL INFORMATION FORMAT DESIGN FOR WIRELESS COMMUNICATION - Certain aspects present methods for designing a downlink control information (DCI) message that may be transmitted in a downlink channel such as a physical downlink control channel (PDCCH). The proposed DCI message supports uplink enhancements such as clustered single input multiple output (SIMO) operation. | 05-23-2013 |
20130148563 | APPARATUS AND METHODS FOR MANAGEMENT, CONFIGURATION AND CONTROL SIGNALING OF NETWORK CODED HARQ IN MOBILE COMMUNICATION SYSTEMS - Techniques for the management, configuration, and control of network coded communications in a wireless network are disclosed herein. In one approach, there is provided an example method operable by an evolved Node B (eNB) or the like. The method may involve grouping a plurality of user equipments (UEs) into a network coding group. The method may involve associating the plurality of UEs in the network coding group with a network coding group identifier. The method may involve sending a data transmission for select UEs in the network coding group using the network coding group identifier. The data transmission may include additional downlink control information related to one or more of the UEs in the network coding group. | 06-13-2013 |
20130163501 | FLEXIBLE CYCLIC PREFIX MANAGEMENT - Aspects of the present disclosure provide techniques for managing cyclic prefixes (CPs). The techniques may involve utilizing different CP types for different portions within a same subframe. Various mechanisms may be used to determine which CP types are used for which portions. | 06-27-2013 |
20130163529 | METHODS AND APPARATUS FOR ASSIGNMENT DEPENDENT DOWNLINK CHANNEL PROCESSING FOR WIRELESS NETWORKS - Aspects of the present disclosure relates generally to communication systems, and more particularly, to apparatus and techniques for handling, within resources of an assigned channel, different availability of interference. Aspects generally include determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference, and selecting different techniques for processing the different portions of the resources, wherein each technique is selected based on the corresponding level or type of interference. In aspects, a fixed pattern or amount of interference for the resources may be selected based on the different levels or the different types of interference and a technique for processing the resources is selected, wherein the technique is selected based on the selected fixed pattern or amount of interference. | 06-27-2013 |
20130163530 | REFERENCE SIGNALS DESIGN FOR TIME TRACKING IN LTE-A - Time tracking in current communication systems may be traditionally based on common reference signals (CRS). However, in certain communication systems, CRS-based time tracking may be impossible to implement due to an absence of CRS in certain subframes or carriers. CRS-based time tracking may also be inappropriate to implement in certain communication systems such as a coordinated multipoint (CoMP) system where control and data may arrive from different cells, and therefore, a UE may assume a wrong cell for CRS-based time tracking. Accordingly, methods, apparatuses, and computer program products for wireless communication are provided in which additional UE specific reference signals (UE-RS) and/or channel state information reference signals (CSI-RS) are made available to the UE so that the UE may have improved channel estimation and/or time tracking performance. | 06-27-2013 |
20130170449 | PROCESSING ENHANCED PDCCH (EPDCCH) IN LTE - A method of wireless communication includes configuring a virtual cell identifier (ID) for a user equipment (UE). The method determines a first candidate for an enhanced physical downlink control channel (ePDCCH) for the UE. The method also determines a first virtual cell ID for the first candidate. Furthermore, the method scrambles the ePDCCH based on the first virtual cell ID and transmits, to the UE, the scrambled ePDCCH using the first candidate. | 07-04-2013 |
20130182688 | METHOD AND APPARATUS FOR PERFORMING RANDOM ACCESS ON A SECONDARY CARRIER - Methods and apparatus are described herein for synchronizing timing when using a secondary component carrier (SCC) in a carrier aggregated wireless network. A user equipment (UE) may determine that it is out of synchronization with respect to an SCC used to communicate with a network element. The UE may inform the network element of the out of synchronization status, and may perform a random access procedure to synchronize the timing. | 07-18-2013 |
20130182799 | DM-RS BASED DECODING USING CSI-RS-BASED TIMING - Certain aspects of the present disclosure relate to a method of wireless communication that includes receiving one or more channel state information reference signal (CSI-RS) resources. The method further includes performing timing estimation based on the one or more CSI-RS resources, receiving a demodulation reference signal (DM-RS) based transmission, and utilizing the timing estimation to decode the DM-RS based transmission. | 07-18-2013 |
20130188611 | SUBFRAME CONSTRAINTS FOR COORDINATED MULTI-POINT COMMUNICATION - Certain aspects of the present disclosure relate to methods, and corresponding apparatus and program products, for wireless communication involving coordinated multipoint (CoMP) operation that involves dynamic switching between multiple transmission points that serve a user equipment (UE). | 07-25-2013 |
20130194953 | POWER CONTROL MANAGEMENT IN UPLINK (UL) COORDINATED MULTIPOINT (COMP) TRANSMISSION - Techniques for performing path loss (PL) compensation in coordinated multipoint (CoMP) systems are provided. A method for wireless communications by a user equipment (UE) is provided. The method generally includes selecting, from a plurality of transmission points involved in uplink (UL) coordinated multipoint (CoMP) operations with the UE, a transmission point to associate with for path loss (PL) compensation, and adjusting power of one or more transmissions based on path loss measured based on the selected transmission point | 08-01-2013 |
20130195043 | REGIONAL AND NARROW BAND COMMON REFERENCE SIGNAL (CRS) FOR USER EQUIPMENT (UE) RELAYS - Certain aspects of the present disclosure relate to techniques for assigning resources for common reference signal (CRS) transmissions from user equipment (UE) relays. Aspects of the present disclosure provide techniques to use minimum possible resources for transmission of CRS in an attempt to reduce interference, reduce power consumption while providing appropriate reference for channel measurement and demodulation. In an aspect, a wireless node (e.g., a UE relay station) may determine resources for transmission of CRS in a subframe based, at least in part, on a type of one or more channels to be transmitted in the subframe, and may transmit the CRS using the determined resources. | 08-01-2013 |
20130195084 | PHYSICAL LAYER ISSUES RELATED TO MULTI-TA GROUP SUPPORT - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may determine a number of uplink timing groups configured for a plurality of component carriers, and determine whether to transmit at least one of data or control information on one or more first component carriers of the plurality of component carriers concurrently with sounding reference signals (SRS) on one or more second component carriers of the plurality of component carriers based at least in part on the number of uplink timing groups. When only one uplink timing group is determined, the SRS is transmitted in a symbol on the one or more second component carriers if the data and control information is not transmitted in the symbol. When two uplink timing groups are determined SRS may be transmitted on the second component carriers concurrently with data or control information on the component carriers | 08-01-2013 |
20130195086 | TIMING MANAGEMENT IN UPLINK (UL) COORDINATED MULTIPOINT (COMP) TRANSMISSION - According to example embodiments, a method for wireless communications by a user equipment (UE) includes receiving signaling indicating multiple timing adjustments (TAs) for different uplink channels between the user equipment (UE) and one or more transmission points, and applying at least one of the multiple TAs when transmitting on at least one of the uplink channels. According to example embodiments, a method for wireless communications by a base station includes determining multiple timing adjustments (TAs) for different uplink channels between the user equipment (UE) and one or more transmission points, and transmitting signaling indicating the multiple timing adjustments (TAs) to the UE. | 08-01-2013 |
20130201917 | DYNAMIC INDICATION OF TRAFFIC TO PILOT (T/P) RATIOS - An method of wireless communication dynamically indicates traffic to pilot ratio (T/P) values in heterogeneous networks. Subframes are categorized into groups that do not overlap. A traffic to pilot ratio (T/P) indicator is received and the a T/P value for a group of subframes is determined based at least in part on the received T/P indicator. | 08-08-2013 |
20130201936 | MANAGING DOWNLINK AND UPLINK RESOURCES FOR LOW COST USER EQUIPMENTS - Certain aspects of the present disclosure relate to techniques for assigning resources for low cost user equipments (UEs). A method for wireless communications by a user equipment (UE) is provided. The method generally includes determining a first bandwidth, within a second bandwidth, for resources available for downlink data transmissions, wherein the first bandwidth is greater than the second bandwidth, determining a third bandwidth for resources available for uplink transmissions, wherein a bandwidth for resources available for uplink transmissions is different than the bandwidth for resources available for downlink transmissions, wherein the third bandwidth is greater than the first bandwidth, and communicating with a network using the determined downlink and uplink resources. | 08-08-2013 |
20130201975 | RESOURCE ALLOCATION FOR ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (EPDCCH) - Certain aspects of the present disclosure provide techniques for systems that support DMRS-based transmissions, that may allow such systems to at least partially utilize resources in the center six RBs of subframes 0 and 5 for DMRS-based transmissions (e.g., EPDCCH), while avoiding collision with Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS) or Physical Broadcast Channel (PBCH). | 08-08-2013 |
20130235821 | SIGNALING OF VIRTUAL CELL IDENTIFIERS AND FALLBACK OPERATION - A method, an apparatus, and a computer program product for wireless communication are provided in which a cell identifier is selected based on one or more properties associated with received downlink control information (DCI), where the properties may not be exclusively associated with determining a cell identifier. The cell identifier may be selected from a plurality of cell identifiers received through radio resource control signaling. The properties of the DCI may include a type of download control channel, a type of subframe and a type of DCI format used to provide the DCI. | 09-12-2013 |
20130242729 | TRANSPORT BLOCK SIZE LIMITATION FOR ENHANCED CONTROL CHANNEL OPERATION IN LTE - In wireless communication carried out by a user equipment (UE), the UE receives one or more transport blocks and makes a determination on the transport blocks, such as determining whether block size and timing advance exceed thresholds, or determining a control channel type associated with the received transport blocks. The UE makes a determination whether to perform skip-decoding of the received transport blocks based, at least in part, on the determination made. | 09-19-2013 |
20130242778 | CHANNEL STATE INFORMATION REFERENCE SIGNAL CONFIGURING AND REPORTING FOR A COORDINATED MULTI-POINT TRANSMISSION SCHEME - A method for wireless communication includes allocating overlapping sets of resources to different UEs. The resources may be for channel state information (CSI) measurement and received power measurements. The overlapping resources include a first set of resources, allocated to a first UE, for the CSI measurements and a second set of resources, allocated to a second UE, for the received power measurements. The method also includes receiving a CSI measurement report and a received power measurement report. The reports are based on the first set of resources and the second set or resources, respectively. | 09-19-2013 |
20130242895 | ENHANCED SOUNDING REFERENCE SIGNAL (SRS) OPERATION - A method of wireless communication includes determining how to handle a collision between the first sounding reference signal (SRS) and a second SRS when the second SRS may the same type as the first SRS and when both the first SRS and the second SRS may be transmitted in a same cell. The method also includes transmitting the first SRS and the second SRS based on a received first and second configuration for SRSs. The first configuration includes a first UE specific cell identification that differs from a second UE specific cell identification of the second configuration and/or a first power offset that differs from a second power offset of the second configuration. | 09-19-2013 |
20130250818 | Synchronization Channel Design for New Carrier Type - Certain aspects of the present disclosure relate to synchronization channel design for a new carrier type. In certain aspects, a User Equipment (UE) may first search for legacy locations of PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal), and attach to a cell that transmits the legacy PSS/SSS. Then the UE may be provided with information indicating a search space for PSS and SSS of a new carrier. The UE may then search for the PSS and SSS for the new carrier based on the received information. The relative spacings in time between the PSS and SSS for the first carrier may be different from the relative spacings in time between the PSS and SSS for the second carrier. In alternative aspects, the UE may receive a frequency offset value and determine PSS/SSS locations for the new carrier based on the frequency offset value and spaced center frequencies. | 09-26-2013 |
20130250874 | COMMON SEARCH SPACE FOR EPDCCH IN LTE - A method and apparatus for wireless communication manages virtual cell ID(s) for the common search. A UE determines a first virtual cell ID for a common search space (CSS) enhanced physical downlink control channel (EPDCCH) and determines a second virtual cell ID for a user equipment search space (UESS) EPDCCH. The UE processes EPDCCH based on the determined first and second virtual cell IDs. | 09-26-2013 |
20130250875 | METHODS AND APPARATUS FOR UPLINK POWER CONTROL - Certain aspects of the present disclosure relate to methods and apparatus for uplink power control when at least two separate power control algorithms are utilized for adjusting transmission power of uplink transmissions on one or more uplink channels to one or more access points. The method includes transmitting one or more power headroom report (PHR) based on channel and/or system parameters. In addition, methods are presented to match power control for uplink channels when different power control algorithms are used for those uplink channels. Furthermore, methods are proposed to compensate for a switch between reference signals on which the power control algorithms are based. | 09-26-2013 |
20130250913 | COOPERATION AND OPERATION OF MACRO NODE AND REMOTE RADIO HEAD DEPLOYMENTS IN HETEROGENEOUS NETWORKS - A method, an apparatus, and a computer program product for wireless communication are provided for separating control transmissions and data transmissions within the coverage area of a plurality of transmission/reception points or points that are geographically displaced, the plurality of points comprising a macro node and a plurality of remote radio heads (RRHs) coupled to the macro node. Separating control transmissions and data transmissions in the macro node/RRH configuration may allow UEs to be associated with one set of transmission points for data transmissions and the same set or a different set of transmission points for common control signaling. Separating control transmissions and data transmissions may also allow for faster reconfiguration of antenna ports used for UE data transmission compared with reconfiguration via a handover process. | 09-26-2013 |
20130250924 | SYSTEMS AND METHODS FOR SIGNALING AND DETERMINING TRANSMISSION TIME INTERVAL BUNDLING PARAMETERS - A method for determining transmission time interval (TTI) bundling parameters on a wireless communication device is described. The method includes receiving signaling that indicates a TTI bundling configuration. The method also includes receiving signaling that indicates an uplink grant. The method further includes determining at least one TTI bundling parameter based on the TTI bundling configuration and the uplink grant. The method additionally includes transmitting a signal based on the at least one TTI bundling parameter. | 09-26-2013 |
20130258864 | H-ARQ TIMING DETERMINATION UNDER CROSS-CARRIER SCHEDULING IN LTE - Techniques are provided for carrier aggregation and H-ARQ timing in LTE or the like. For example, there is provided a method, operable by a mobile device, that may involve identifying a first component carrier and a second component carrier among a plurality of component carriers to be aggregated, wherein a first number of subframes of a subframe type in the first component carrier is less than a second number of subframes of the same subframe type in the second component carrier. The method may further involve receiving a configuration to monitor a control channel for the second component carrier on the first component carrier. The method further may further involve determining a reference uplink-downlink subframe configuration for the second component carrier based at least in part on the subframe type and the received configuration for the control channel. | 10-03-2013 |
20130258884 | FORMAT DEPENDENT POWER CONTROL FOR COORDINATED MULTIPOINT TRANSMISSION - An apparatus determines a transmission power of a signal transmitted by a user equipment (UE) in a cell that is identified by a virtual cell identifier. The apparatus generates a power control command based on the determined signal power, and transmits the power control command to a plurality of UEs. Subsequent to transmission of the power control command, the apparatus receives a plurality of transmissions from the plurality of UEs. Some of the transmissions have different transmission powers. The different transmission powers of the signals transmitted by the UEs are due to the power control command and a predefined power offset associated with each respective UE. | 10-03-2013 |
20130258960 | CHANNEL STATE INFORMATION DEPENDENT ACK/NAK BUNDLING - A method of wireless communication includes determining a capacity of a control channel based on whether multiplexing of acknowledgement/negative acknowledgement (ACK/NAK) bits for multiple component carriers with periodic channel state information (CSI) is allowed. A threshold for a number of ACK/NAK bits is determined based at least in part on a payload size of the periodic CSI and the determined capacity. The method also includes bundling ACK/NAK bits when a number of the ACK/NAK bits is greater than the determined threshold. The ACK/NAK bits and the periodic CSI are transmitted via the control channel. | 10-03-2013 |
20130258965 | CHANNEL STATE INFORMATION REFERENCE SIGNAL (CSI-RS) CONFIGURATION AND CSI REPORTING RESTRICTIONS - A method of wireless communication includes determining a capability for a number of channel state information configurations supported by a user equipment (UE). The channel state information processes link a channel measurement report with an interference measurement report. The UE transmits the capability to an eNodeB. Additionally, the UE receives CSI process configurations. The CSI process configurations identify CSI processes that can be requested by the eNodeB. | 10-03-2013 |
20130286848 | METHOD AND APPARATUS FOR SIGNALING IN DENSE NETWORK OPERATIONS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus transitions to a dormant state and transmits a very low duty cycle signal (LDCS) while in the dormant state. The apparatus may transmit an LDCS configuration to a second entity, the second entity being one of an LPN that is not in a dormant state and a macro cell. The apparatus may further monitor for a RACH messages at a predetermined RACH delay after transmitting the LDCS. The apparatus may transition to a DRX/DTX mode. The DRX/DTX mode may be matched to at least one connected UE. | 10-31-2013 |
20130286902 | FLEXIBLE SPECIAL SUBFRAME CONFIGURATION FOR TDD IN LTE - Dynamically changing uplink-downlink configurations in adjacent cells in a TDD networks introduces interference to special subframes between downlink and uplink transmissions. Adaptation is disclosed of different special subframe configurations for certain subframes based on different communication environment characteristics experienced on the special subframes. The different special subframe configurations may be differ among special subframe within the same or in a different radio frames or may be applied to a corresponding subframe in a neighboring cell. Over time, as changes to the communication environment are detected, the special subframe configurations may adapt to the communication environment characteristics. | 10-31-2013 |
20130286912 | METHOD AND APPARATUS FOR SIGNALING IN DENSE NETWORK OPERATIONS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus identifies a UE relay and transmits a very low duty cycle signal (LDCS) configuration of the UE relay. The apparatus may comprise, e.g., an LPN that is not in a dormant state or a macrocell. The apparatus may receive LDCS information for the UE relay. The apparatus may determine the LDCS configuration and transmit the LDCS configuration to the UE relay. | 10-31-2013 |
20130286928 | METHOD AND APPARATUS FOR SIGNALING IN DENSE NETWORK OPERATIONS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives an LDCS configuration for a UE relay from a second entity and monitors for an LDCS from the UE relay based on the received LDCS configuration. The second entity may comprise one of an LPN that is not in a dormant state and a Macro cell. The apparatus may receive LDCS configurations for a plurality of LPNs and monitor for a plurality of LPNs based on the received LDCS configurations. When the apparatus determines a need to connect to a LPN, the apparatus may select an LPN among the plurality of LPNs. | 10-31-2013 |
20130286965 | SIGNAL DESIGNS FOR DENSELY DEPLOYED NETWORK - Aspects of the present disclosure relate to techniques that may be utilized in networks with relatively dense deployments of nodes, such as remote radio heads (RRHs) and UE relays. | 10-31-2013 |
20130294317 | APPARATUS AND METHODS OF MBMS SUPPORT IN NEW CARRIER TYPE IN LTE - Methods and apparatus of supporting multi-media broadcast services in a wireless communication system include generating a carrier capable of carrying data traffic including broadcast data and unicast data, wherein the carrier comprises a carrier type that is non-backward compatible with existing carriers. Aspects of the methods and apparatus include transmitting broadcast data in at least one subframe of a plurality of subframes. Aspects also include providing control information at least for unicast data associated with the at least one subframe and transmitting the carrier. | 11-07-2013 |
20130294333 | SYSTEMS AND METHODS FOR REDUCED OVERHEAD IN WIRELESS COMMUNICATION SYSTEMS - Systems and methods are disclosed which implement one or more overhead reduction technique, if channel conditions favorable to implementation of overhead reduction are present. The one or more overhead reduction technique may have one or more restriction corresponding to the channel for which the overhead reduction technique is implemented. The one or more overhead reduction technique implemented may include time-domain bundling, frequency-domain bundling, and pattern adaptation. Pattern adaptation may include pattern code-domain reduction, pattern timing-domain reduction, and pattern frequency-domain reduction. | 11-07-2013 |
20130294361 | METHODS AND APPARATUS FOR MANAGING CONTROL AND DATA TRANSMISSIONS FOR LOW COST USER EQUIPMENTS - Certain aspects of the present disclosure relate to methods and apparatus for managing control and data transmissions for low cost UEs. In certain aspects, multiplexing of a control channel and data channel may be allowed in a Physical Resource Block (PRB) pair of a subframe. An indication may be provided to the UE regarding whether a portion of resources of the PRB pair not used to transmit the control channel is available for transmitting the data channel. In alternative aspects, control and data may be scheduled in different subframes, such that there is no need to multiplex them in a subframe or a PRB pair in a same subframe. | 11-07-2013 |
20130294362 | RESOURCE MAPPING FOR ePDCCH IN LTE - A method of wireless communication includes resource mapping for an enhanced physical downlink control channel (ePDCCH) or a physical downlink shared channel (PDSCH). A set of non-colliding resources and a set of colliding resources are determined. Code symbols are mapped for a channel first to the set of non-colliding resources and then to the set of colliding resources. | 11-07-2013 |
20130301450 | METHOD AND APPARATUS FOR PERFORMING COORDINATED MULTIPOINT FEEDBACK UNDER MULTIPLE CHANNEL AND INTERFERENCE ASSUMPTIONS - Certain aspects of the present disclosure provide methods and apparatus for performing coordinated multipoint (CoMP) channel state information (CSI) feedback under multiple channel and interference assumptions. One method generally includes receiving signaling indicating at least one or more interference measurement resources (IMRs) from a network and a configuration with one or more non-zero power reference signal (NZP-RS) resources in which one or more base stations transmit a RS, performing separate interference measurements at least on a per-IMR basis in one or more subframes by forming a baseline interference estimate based on the IMR and forming separate interference estimates based on adding interference from selected NZP-RS resources to the baseline interference estimate, and transmitting one or more CSI feedback reports that correspond to the interference measurements. | 11-14-2013 |
20130301524 | METHODS AND APPARATUS FOR MANAGING MACHINE-TYPE COMMUNICATIONS - The described aspects include methods and apparatus providing MTC in a wireless network. In an aspect, a narrow bandwidth within a wide system bandwidth is allocated for communicating data related to MTC. MTC control data generated for communicating over one or more MTC control channels for an MTC UE within the narrow bandwidth is transmitted over the one or more MTC control channels. The one or more MTC channels are multiplexed with one or more legacy channels over the wide system bandwidth. Other aspects are provided for transmission mode and content of the MTC control data or other MTC data. | 11-14-2013 |
20130301525 | METHODS AND APPARATUS FOR MANAGING MACHINE-TYPE COMMUNICATIONS - The described aspects include methods and apparatus providing MTC in a wireless network. In an aspect, a narrow bandwidth within a wide system bandwidth is allocated for communicating data related to MTC. MTC control data generated for communicating over one or more MTC control channels for an MTC UE within the narrow bandwidth is transmitted over the one or more MTC control channels. The one or more MTC channels are multiplexed with one or more legacy channels over the wide system bandwidth. Other aspects are provided for transmission mode and content of the MTC control data or other MTC data. | 11-14-2013 |
20130301552 | METHODS AND APPARATUS FOR MANAGING MACHINE-TYPE COMMUNICATIONS - The described aspects include methods and apparatus providing MTC in a wireless network. In an aspect, a narrow bandwidth within a wide system bandwidth is allocated for communicating data related to MTC. MTC control data generated for communicating over one or more MTC control channels for an MTC UE within the narrow bandwidth is transmitted over the one or more MTC control channels. The one or more MTC channels are multiplexed with one or more legacy channels over the wide system bandwidth. Other aspects are provided for transmission mode and content of the MTC control data or other MTC data. | 11-14-2013 |
20130301564 | INTERACTION OF SOUNDING REFERENCE SIGNALS WITH UPLINK CHANNELS FOR COORDINATED MULTI-POINT OPERATIONS - Certain aspects of the present disclosure provide methods and apparatus for facilitating interaction of sounding reference signals (SRS) with uplink channels, while supporting coordinated multipoint (CoMP) transmission/reception operations. One method generally includes receiving, from one or more nodes participating in the CoMP operations with a user equipment (UE), signaling indicating at least one of cell-specific SRS configurations or formats for uplink channels, and determining based, at least in part upon the signaling, whether at least one last symbol of a subframe is available for transmitting one or more of the uplink channels from the UE. | 11-14-2013 |
20130301566 | COEXISTENCE BETWEEN LEGACY CARRIER TYPES AND NEW CARRIER TYPES - A method of wireless communication occurs in a frequency band having a first set of resources associated with a first carrier type and a second set of resources associated with a second carrier type. In one configuration, the first carrier type is a new carrier type and the second carrier type is a legacy carrier type. Legacy UEs may only receive signals from the second carrier type. However, new UEs may receive signals from both the first carrier type and the second carrier type. Therefore, to provide backward compatibility while supporting new UEs, an eNodeB may signal support of the first carrier type to a new UE while maintaining signaling with legacy UEs. Additionally, the eNodeB may restrict operations of a UE to the first set of resources or second set of resources. | 11-14-2013 |
20130301570 | Interference Management for Adaptive TDD with Frequency Domain Separations - A method of wireless communications includes adapting to downlink/uplink resource allocations. In particular, the downlink/uplink communications may be adjusted according to time division duplexed (TDD) configurations of serving and neighbor cells. | 11-14-2013 |
20130301587 | BLINDLY DECODING INTERFERING CELL PDCCH TO ACQUIRE INTERFERING CELL PDSCH TRANSMISSION INFORMATION - Certain aspects of the present disclosure relate to a technique for decoding a control channel in an interfering cell. Information obtained from the decoded channel may be used to perform interference cancellation, perform noise estimation, obtain information about operation of one or more base stations, and/or to decode transmissions in a different interfering cell. | 11-14-2013 |
20130308465 | METHOD AND APPARATUS FOR JOINT HARQ AND DRX OPTIMIZATION FOR LOW COST MTC DEVICES - A method for wireless communication may include a mobile entity receiving a timing indicator for a discontinuous reception (DRX) cycle during a DRX mode, and adjusting at least an acknowledgement timing in response to receiving the timing indicator for the DRX cycle. A base station in communication with the mobile entity may provide a timing indicator for a DRX cycle during a DRX mode to the mobile entity, transmit at least one of downlink (DL) data or an uplink (UL) grant indicator to the mobile entity at a first time, and waiting from the first time for a time period indicated by the timing indicator before receiving at least one of an acknowledgement of the DL data or UL data responsive to the UL grant from the mobile entity. | 11-21-2013 |
20130308567 | METHODS AND APPARATUS FOR POSITIONING REFERENCE SIGNALS IN A NEW CARRIER TYPE - Certain aspects of the present disclosure relate to methods and apparatus for positioning reference signals (PRS) in a new carrier type (NCT). A UE (user equipment) may identify a carrier type in which PRS will be transmitted and may determine a pattern for the PRS based on the identified carrier type. For example, different PRS patterns may be used for legacy and new carrier types. Similarly, a base station (BS) may determine a pattern for the PRS based on identifying a carrier type in which the PRS will be transmitted. Additionally, the BS may transmit signaling to the UE indicating the pattern for the PRS. The UE may determine the PRS pattern based, at least in part, on the received indication. | 11-21-2013 |
20130308568 | METHODS AND APPARATUS FOR SUBFRAME CONFIGURATION FOR WIRELESS NETWORKS - Certain aspects generally relate to methods and apparatus for subframe configuration for wireless networks. For example, certain aspects provide methods and apparatus for dynamically and/or reliably indicating at least one of a downlink or uplink subframe configuration. One method includes broadcasting an information block message including a first subframe configuration indicating at least one of which subframes of a set of subframes are for uplink transmissions or which subframes of the set of subframes are for downlink transmissions, determining a second subframe configuration suitable for handling communications with one or more user equipment (UEs), and signaling an indication of the second subframe configuration to the one or more UEs. Other methods includes receiving such a broadcast information block message, receiving signaling indicating a second subframe configuration suitable for handling communications with a base station, and communicating with the base station in accordance with the second subframe configuration. | 11-21-2013 |
20130308575 | METHOD AND APPARATUS FOR POWER CONTROL OF FIRST DATA TRANSMISSION IN RANDOM ACCESS PROCEDURE OF FDMA COMMUNICATION SYSTEM - Transmit power is controlled for a first uplink data transmission on Physical Uplink Shared Channel (PUSCH) during random access channel (RACH) procedure. Power control adjustment for the first PUSCH transmission is performed relative to the power spectral density used for successful PRACH transmission as adjusted for bandwidth difference, etc. The uplink Physical random access channel carries the RACH information that is transmitted by the user equipment (UE) during registrations or base station originated calls. A PRACH is composed of a number of preambles and a message portion. The preambles are a series of radio frequency power “steps” that increase in power according to the power step setting until the maximum number of preambles is reached or the base station acknowledges. Once the UE receives a positive indication, it transmits the message portion of the PRACH which consists of message data and control data with independent power gain control. | 11-21-2013 |
20130308714 | CODEBOOK AND FEEDBACK DESIGN FOR HIGH ORDER MIMO - Aspects of the present disclosure relate to techniques that may be utilized in networks with base stations and/or mobile devices that use large number of antennas or multi-dimensional arrays of antennas. | 11-21-2013 |
20130310037 | CARRIER AGGREGATION CAPABLE MOBILE OPERATION OVER SINGLE FREQUENCY - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus communicates with a primary serving cell via a first radio, detects a presence of a target cell, sends a first message to the primary serving cell indicating the detected presence of the target cell, receives a command from the primary serving cell to add the target cell as a secondary serving cell, and communicates with at least one of the primary serving cell or the target cell via a second radio to facilitate a handover to the target cell. The first radio and the second radio operate on a same frequency. A downlink control channel of the primary serving cell is not used to schedule a target cell downlink transmission. An uplink control channel to the primary serving cell is not used to provide an acknowledgment of the target cell downlink transmission. The uplink control channel to the primary serving cell is not used to provide channel side information for the target cell downlink transmission. | 11-21-2013 |
20130322363 | NARROW BAND PARTITIONING AND EFFICIENT RESOURCE ALLOCATION FOR LOW COST USER EQUIPMENTS - Aspects of the present disclosure relate to techniques that may be utilized to perform communications using narrow bands partitioned from available bandwidth. In some cases, a base station may select at least one narrow band, from a number of narrow bands partitioned from an available system bandwidth, for communications with a user equipment (UE), signal information regarding the selected narrow band to the UE, and communicat with the UE using the selected narrow band. The UE may receive the information regarding the selected at least one narrow band, and communicate with at least one base station using the at least one narrow band. | 12-05-2013 |
20130329657 | SIGNALING OF VIRTUAL CELL ID - The present disclosure provides techniques for signaling sets of virtual cell IDs available for use in communicating with UEs. Such knowledge may allow a UE to enhance processing its own downlink channels when similar downlink channels for other UEs are multiplexed within the same physical resource block (PRB). | 12-12-2013 |
20130329661 | TRANSPORT BLOCK SIZE DETERMINATION IN NEW CARRIER TYPE IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus detects a carrier type for receiving a signal, determines a transport block size (TBS) based on the detected carrier type, and receives the signal according to the determined TBS. The apparatus further detects a carrier type for receiving a signal, determines channel quality information (CQI) based on the detected carrier type, and transmits the CQI. The apparatus also determines a carrier type for transmitting a signal, determines a transport block size (TBS) based on the carrier type, and transmits the signal according to the determined carrier type and TBS. The apparatus further determines a carrier type for transmitting a signal, transmits the signal according to the determined carrier type, and receives channel quality information (CQI) from a user equipment (UE) based on the carrier type. | 12-12-2013 |
20130329662 | REFERENCE SIGNAL POWER IMPACT DETERMINATION IN NEW CARRIER TYPE IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The apparatus determines a first bandwidth and a second bandwidth of a cell, wherein a reference signal is present in the second bandwidth and is not present outside the second bandwidth. The apparatus receives a physical channel with at least one resource block in a subframe from the cell, the subframe including one or more symbols. The apparatus determines at least one energy per resource element (EPRE) ratio for the received physical channel based at least in part on the first bandwidth and the second bandwidth. The apparatus processes the physical channel based on the determined EPRE ratio. | 12-12-2013 |
20130336260 | PHYSICAL RANDOM ACCESS CHANNEL (PRACH) TRANSMISSION IN MULTICARRIER OPERATION - Systems and methodologies are described that facilitate selecting an uplink carrier for random access within a wireless environment having multiple carriers. Selection of an uplink carrier for random access can be randomly selected from a set of available uplink carriers. Additionally, the uplink carrier for random access can be selected based upon which uplink carrier is paired with an anchor carrier. Further, the uplink carrier for random access can be identified based upon a bandwidth related to the user equipment (UE). Reference signals can also be employed in order to identify an uplink carrier to perform random access. | 12-19-2013 |
20130343239 | DATA TRANSMISSION IN CARRIER AGGREGATION WITH DIFFERENT CARRIER CONFIGURATIONS - Techniques are provided for aggregating carriers with different carrier configurations. The carriers may include both time division duplex (TDD) and frequency division duplex (FDD) carriers which may be configured such that control information for both carrier types is conveyed by the TDD carrier. In one aspect, an association between a set of subframes, including both TDD and FDD subframes, is determined. The association may operate to distribute control information for the FDD carrier over uplink subframes of the TDD carrier to achieve a load balancing. Alternatively, the association may operate to minimize a hybrid automatic repeat request (HARQ) feedback delay. The TDD carrier may provide resource grants for the aggregated carriers and the association may be used to identify subframes from both carriers which may be scheduled in a given DL subframe. | 12-26-2013 |
20130343301 | TECHNIQUES FOR JOINT SUPPORT OF COORDINATED MULTIPOINT (CoMP) OPERATIONS AND CARRIER AGGREGATION (CA) - Certain aspects of the present disclosure provide methods and apparatus for joint support of coordinated multipoint (CoMP) operations and carrier aggregation (CA). One method generally includes receiving signaling indicating a configuration, from a set of possible configurations, that defines how the UE is to communicate with one or more base stations (BSs) using coordinated multipoint (CoMP) operations on one or more component carriers (CCs) and communicating in accordance with the configuration. | 12-26-2013 |
20130343348 | DEMODULATION REFERENCE SIGNALS FOR RETRANSMISSION IN WIRELESS COMMUNICATION - Provided is a method for wireless communication which includes transmitting codewords according to an initial transmission rank, receiving downlink transmissions indicating at least one of the codewords to be retransmitted, constructing a demodulation reference signal (DM-RS) to be sent with the at least one codeword to be retransmitted, and retransmitting the at least one codeword with the DM-RS according to a retransmission rank. The downlink transmissions may include one or more physical hybrid automatic retransmission request indicator channels and the DM-RS may be constructed based at least in part on information in the downlink transmissions. | 12-26-2013 |
20140003479 | INTERFERENCE SIGNAL DIVERSITY COMBINING FOR INTERFERENCE CANCELLATION | 01-02-2014 |
20140010131 | APPARATUS AND METHODS OF ENERGY EFFICIENT COMMUNICATION - A method of energy efficient wireless communication, including obtaining a signal pattern defining resources for use in transmitting or receiving signals with variable signal density over time, the signals including a plurality of signals defining a signal burst, configuring the resources based on the signal pattern, including aligning a discontinuous reception (DRX) period with the signal burst, and transmitting or receiving the signals, including the signal burst aligned with the DRX period, according to the signal pattern to achieve variable density signal transmission or reception over time. Additionally, a method may include obtaining a signal pattern that defines a first set of signals with a first density and a first periodicity and a second set of signals with a second density different than the first density and a second periodicity different than the first periodicity, and communicating reference signals among the plurality of communications devices based on the signal pattern. | 01-09-2014 |
20140016488 | METHODS AND APPARATUS FOR POWER SAVING IN BROADCASTING CARRIER INFORMATION - The described aspects include methods and apparatus for activating a transmitter to communicate in a wireless network. A small cell can determine to activate the transmitter to serve user equipment (UE) in a wireless network. The small cell can then broadcast a portion of a set of broadcast signals in a radio frame and broadcast a remaining portion of the set of broadcast signals along with the portion of the set of broadcast signals in a subsequent radio frame. By refraining from immediately broadcasting all broadcast signals, the small cell can mitigate interference to other small cells. In addition, a UE can determine whether to generate random access channel (RACH) sequences for proximity determination or uplink timing synchronization based on parameters received in a RACH order. Moreover, a small cell with an active transmitter can decode discovery signals from a device to facilitate handover determination. | 01-16-2014 |
20140023001 | APPARATUSES AND METHODS OF DETECTION OF INTERFERING CELL COMMUNICATION PROTOCOL USAGE - A method, an apparatus, and a computer program product for wireless communication are provided in connection with UE centric interfering cell communication protocol usage detection. In one example, a communications device (e.g., a UE) is equipped to receive one or more signals from each cell of a plurality of cells including a set of interfering cells. The set of interfering cells includes one or more interfering cells. The UE can detect system release version information for at least one cell from the set of interfering cells, and then modify its communication processing with a serving cell based on the detected system release version information. | 01-23-2014 |
20140036802 | INTERACTION BETWEEN EPCFICH AND EPDCCH IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided. In one configuration, the apparatus may be a UE. The apparatus may receive a message (e.g., via an ePCFICH) from an eNB and may process an ePDCCH using the message. The apparatus may receive a message via an ePCFICH indicating resources for ePDCCH, the ePDCCH being a localized ePDCCH and/or a distributed ePDCCH and process the ePDCCH using the message. The apparatus may receive an ePCFICH from an eNB, where the ePCFICH is a function of at least a PCI or a virtual cell identifier. The apparatus may process an ePDCCH using a default set of resources when an ePCFICH is not detected. The apparatus may receive an ePCFICH value and may determine either a starting symbol index for an ePDCCH or one or more ePDCCH resource sets based at least on the ePCFICH value. | 02-06-2014 |
20140036804 | METHODS AND APPARATUS FOR PROCESSING CONTROL AND/OR SHARED CHANNELS IN LONG TERM EVOLUTION (LTE) - Certain aspects provide methods and apparatus for processing a control channel and/or a shared channel in a subframe based on a determination that one or more channel properties of the two channels are substantially the same. One example method generally includes receiving a control channel and a shared channel within a subframe; determining that one or more channel properties of the control channel and the shared channel in the subframe are substantially the same; and processing the control channel and the shared channel based on the determination. In this manner, estimations determined for a first channel may be assumed for a second channel whose channel properties are substantially the same as the first channel, rather than by separately determining the estimations for the second channel, thereby saving processing time. | 02-06-2014 |
20140036806 | METHODS AND APPARATUS FOR COORDINATED MULTIPOINT (CoMP) COMMUNICATIONS - Certain aspects of the present disclosure relate to methods and apparatus for Coordinated Multipoint (CoMP) communications. Certain aspects relate to methods and apparatus for determining resource mapping and/or rate matching for CoMP operations. | 02-06-2014 |
20140036809 | METHOD AND APPARATUS FOR SOUNDING REFERENCE SIGNAL TRIGGERING AND POWER CONTROL FOR COORDINATED MULTI-POINT OPERATIONS - Certain aspects of the present disclosure provide methods and apparatus for sounding reference signal (SRS) triggering and power control for coordinated multi-point (CoMP) operations. One method generally includes maintaining separate power control processes for at least a first aperiodic SRS (A-SRS) and a second A-SRS, receiving, in a first subframe, a downlink transmission triggering transmission of at least one of the first and second A-SRS in a subsequent subframe, identifying which of the first and second A-SRS to transmit in the subsequent subframe, receiving a first power control command that indicates a power control value to apply to the identified A-SRS, and transmitting the identified A-SRS based in accordance with the first power control command. | 02-06-2014 |
20140036812 | COMMUNICATING WITH AN ENHANCED NEW CARRIER TYPE - A method of wireless communication is presented for an enhanced new carrier type cell. The method includes transmitting downlink common signals and channels at a low duty cycle while in a dormant state. The method also includes transmitting downlink common signals and channels at a high duty cycle while in an active state. | 02-06-2014 |
20140043988 | METHODS AND APPARATUS FOR RADIO LINK MONITORING IN NEW CARRIER TYPE (NCT) IN A LONG TERM EVOLUTION (LTE) SYSTEM - Certain aspects provide methods and apparatus for performing radio link monitoring (RLM) based on channel state information reference signals (CSI-RSs). Such RLM may be performed for certain carriers, such as New Carrier Type (NCT) in a Long Term Evolution (LTE) system, for example, in which reference signals conventionally used for RLM (e.g., common reference signals (CRSs) in LTE Rel-8/9/10) are not available in every subframe. Radio link failure (RLF) may be declared based on the RLM. One example method generally includes determining at least one of a first set of CSI-RS resources for use in channel estimation to perform RLM measurements or a second set of CSI-RS resources for use in interference estimation to perform the RLM measurements and performing the RLM measurements based on the one or more determined sets of CSI-RS resources. Certain aspects provide methods and apparatus for performing radio resource management (RRM) based on CSI-RSs. | 02-13-2014 |
20140044040 | METHOD AND APPARATUS FOR INDICATING ACTIVE CHANNEL STATE INFORMATION REFERENCE SIGNAL (CSI-RS) CONFIGURATIONS - Techniques for indicating active channel state information reference signal (CSI-RS) configurations for a user equipment (UE) are disclosed. The UE may be configured with multiple CSI-RS configurations and may receive signaling indicating which of its CSI-RS configurations are active. Improved performance may be obtained by dynamically signaling the active CSI-RS configurations. In one example, the UE may receive first signaling (e.g., upper-layer signaling) indicating a plurality of CSI-RS configurations configured for the UE. The UE may receive second signaling (e.g., lower-layer signaling) indicating at least one active CSI-RS configuration for the UE. The active CSI-RS configuration(s) may include all or a subset of the plurality of CSI-RS configurations. The UE may perform at least one communication task based on the at least one active CSI-RS configuration for the UE. The communication task(s) may include de-rate matching, CSI reporting, cell set management, etc. | 02-13-2014 |
20140044052 | UPLINK POWER CONTROL FOR WIRELESS COMMUNICATION - Certain aspects of the present disclosure provide closed loop and open loop power control techniques for each antenna of the user equipment (UE). The access point may measure the received signals from each antenna of the user equipment, calculate a power adjustment parameter for each antenna of the UE, and transmit the parameters to the UE. The UE may use the adjustment parameters to determine the transmit power value for each antenna. In addition, the UE may measure the path loss for each antenna and update the transmit power per antenna based on the path loss and other parameters. | 02-13-2014 |
20140044056 | DOWNLINK COVERAGE ENHANCEMENTS - Aspects of the present disclosure provide techniques and apparatus for enhancing downlink coverage for certain user equipments (UEs) (e.g., low cost, low data rate UEs). Certain types of UEs may have limited coverage or should receive enhanced coverage relative to other types of UEs. For example, some types of low cost UEs may have only a single receive chain, thereby limiting DL coverage, while other types of UEs benefit from multiple receive chains. One example method generally includes identifying a first type of one or more UEs that is to receive enhanced downlink (DL) coverage relative to a second type of UEs and utilizing one or more DL coverage enhancement techniques when communicating with the first type of UEs, the one or more DL coverage enhancement techniques designed to adjust at least for reduced DL processing gain of the first type of UEs relative to the second type of UEs. | 02-13-2014 |
20140044057 | CELL ID AND ANTENNA PORT CONFIGURATIONS FOR EPDCCH - A method of wireless communication is provided which includes determining a first cell identification (ID) for scrambling a first reference signal of a first enhanced physical downlink control channel (EPDCCH) and determining a second cell ID for scrambling a second reference signal of a second EPDCCH. The second cell ID is based at least in part on the first cell ID. The first reference signal and the second reference signal are mapped to a same set of resources. The method also includes transmitting the first EPDCCH and second EPDCCH. | 02-13-2014 |
20140044097 | MOBILITY OPERATION IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided. In an aspect, the apparatus establishes a first and/or second communication link with at least a first cell. The first communication link may be for receiving transmissions and the second communication link may be for sending transmissions. The apparatus performs a handover of one of the first and second communication links to at least a second cell. The apparatus determines a value of a parameter after the handover is performed based on a value of the parameter prior to the handover. In another aspect, the apparatus establishes a first and/or second communication link with at least a first cell. The first communication link may be for receiving transmissions and the second communication link may be for sending transmissions. In such aspect, a virtual cell ID is reconfigured for one of the first and second communication links. | 02-13-2014 |
20140071957 | COVERAGE ENHANCEMENT TECHNIQUES FOR MACHINE TYPE COMMUNICATION DEVICES IN A WIRELESS NETWORK - Certain aspects provide a method for wireless communications by a first access point, comprising determining a first schedule of intervals for the first access point to communicate with a first group of one or more wireless devices, wherein intervals of the first schedule are synchronized with wake up or transmission cycles of the first group of one or more wireless devices and communicating with the first group of one or more wireless devices according to the first schedule. | 03-13-2014 |
20140086092 | METHOD AND APPARATUS FOR CHANNEL FEEDBACK BASED ON REFERENCE SIGNAL - Techniques for supporting channel measurement and reporting in a wireless communication system are described. In one design, a cell transmits a cell-specific reference signal (CRS) used for channel estimation and coherent demodulation and a channel spatial information reference signal (CSI-RS) used for channel measurement and channel feedback reporting. The cell may transmit the CSI-RS less frequently than the CRS, or from more antenna ports than the CRS, or on fewer resource elements than the CRS, or a combination thereof. In one design, a user equipment (UE) determines at least one bandwidth part configured for the UE, with each bandwidth part covering at least one subband. The UE receives the CRS and CSI-RS from the cell, determines channel feedback information for the at least one bandwidth part based on the CSI-RS, sends the channel feedback information to the cell, and receives data transmitted by the cell based on the channel feedback information. | 03-27-2014 |
20140098732 | PROCESSING PMCH AND EPDCCH IN LTE - Methods and apparatuses are provided for resolving collisions between a multicast channel (such as a physical multicast channel (PMCH)) and a control channel (such as an enhanced physical downlink control channel (EPDDCH)) in a wireless network, such as LTE. In an aspect, a UE determines whether to process an enhanced physical downlink control channel (EPDCCH) or a signal of a service in a subframe. The UE communicates in accordance with the determination. | 04-10-2014 |
20140098751 | REFERENCE SIGNALS FOR AN ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL - A method of wireless communication includes generating a first reference signal (e.g., DM-RS) based on a first scrambling identifier. The method also includes generating a second reference signal (e.g., DM-RS) based on a second scrambling identifier. The second scrambling identifier is different from the first scrambling identifier. The method further includes transmitting the first reference signal for a control channel (e.g., EPDCCH) and transmitting the second reference signal for a data channel (e.g., PDSCH). | 04-10-2014 |
20140098754 | METHODS AND APPARATUS FOR IMPROVED RESOURCE MANAGEMENT IN LTE - Certain aspects of the present disclosure relate to methods and apparatus for improved resource management in LTE. Methods and apparatus are provided for receiving, by a user equipment (UE), signaling providing an indication of a set of one or more subframes in which a set of resources are non-usable for one or more functions performed by the UE, or determining of the set by the UE, and excluding the non-usable resources when performing the one or more functions. Methods and apparatus are provided for identifying, by a base station (BS), a set of one or more subframes in which a set of resources might not be suitable for one or more functions performed by a user equipment (UE) and transmitting signaling, to the UE, providing an indication the set of resources are non-usable in the one or more subframes for the one or more functions performed by the UE. | 04-10-2014 |
20140112168 | ENHANCED SRS TRANSMISSION FOR MIMO OPERATION IN LTE-A - Enhanced sounding reference signal (SRS) transmissions for multiple input, multiple output (MIMO) operation are disclosed in which a user equipment (UE) detects an observed interference level for each receiver chain of the UE. In response to an imbalance, the UE precodes a SRS targeting downlink operation to indicate the imbalance. The UE then transmits the precoded SRS. In alternative aspects, the precoded SRS vector may be determined by an evolved nodeB (eNB). In such aspects, the eNB determines the precoded SRS vector targeting downlink operations for the served UEs, wherein the determined precoded SRS vector includes determining the precoded SRS vector on a per UE basis, enabling the precoded SRS vector for either one or both of frequency division duplex (FDD) systems and time division duplex (TDD) systems, or enabling the precoded SRS vector for aperiodic SRS only. The eNB then transmits the determined precoded SRS vector to the UE. | 04-24-2014 |
20140112247 | UE-ASSISTED MANAGEMENT OF ADVANCED RADIO LINK FEATURES - UE-assisted management of advanced radio link feature in a wireless communication network may include a network entity determining that a mobile entity is capable of communicating with one or more base stations using a set of radio link configurations, receiving a request from the mobile entity to restrict use of at least one of the radio link configurations, and restricting use of the at least one of the radio link configurations for communicating with the mobile entity, based on the request. The request may indicate a reason for the restriction, and the network entity may determine whether to restrict based on the reason. Once a radio link configuration is restricted, it may similarly be unrestricted based on a subsequent UE request, or based on expiration of a time period. | 04-24-2014 |
20140112261 | ENHANCED POSITIONING REFERENCE SIGNAL TRANSMISSION IN WIRELESS COMMUNICATION NETWORK - Methods and apparatus for determining a PRS configuration in a dynamic TDD configuration adaptation are described. One example method generally includes determining a first PRS configuration for receiving PRS when communicating according to a first subframe configuration that defines one or more uplink subframes and one or more downlink subframes, receiving an indication of a switch from the first subframe configuration to a second subframe configuration, and determining a second PRS configuration for receiving PRS when communicating according to the second subframe configuration. | 04-24-2014 |
20140119331 | UPLINK COVERAGE ENHANCEMENTS - Aspects of the present disclosure provided techniques for enhancing uplink coverage. A method for wireless communications by a wireless device is provided. The method generally includes obtaining a payload of data to be transmitted to a base station, selecting at least one uplink control channel and a number of transmission time intervals (TTIs), and conveying the data in the at least one uplink control channel over the number of TTIs, wherein different portions of the data are conveyed in different TTIs. | 05-01-2014 |
20140126484 | PROCESSING OVERLAPPING EPDCCH RESOURCE SETS - A method of wireless communication is presented. The method includes determining whether decoding candidates for enhanced control channel resource sets overlap. The method further includes determining uplink resources based on a predefined rule when the decoding candidates overlap. | 05-08-2014 |
20140126485 | MANAGING CROSS-CARRIER SCHEDULING IN CARRIER AGGREGATION WITH EPDCCH IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided for cross-carrier scheduling when both PDCCH and EPDCCH are employed in a network that supports carrier aggregation. The apparatus receives a first component carrier and a second component carrier, where the first component carrier includes a first control channel, a second control channel, and carrier indication information. The first control channel corresponds to the first component carrier. The second control channel and the carrier indication information correspond to the second component carrier. The second control channel is one of at least a first type (e.g., PDCCH) or second type (e.g., EPDCCH) of control channel and the carrier indication information identifies the second component carrier for both the first and second types of control channels. The apparatus then processes the first and second control channels. | 05-08-2014 |
20140126490 | EPDCCH RESOURCE AND QUASI-CO-LOCATION MANAGEMENT IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided. In an aspect, the apparatus may receive a set of configurations for an EPDCCH that are tied to a set of configurations received for a PDSCH. The apparatus may then receive and process the EPDCCH based on at least one configuration from the set of configurations for the EPDCCH. In another aspect, the apparatus may determine at least a first and second resource set configured for a control channel and may determine a common set of aggregation levels for the first and second resource sets. The apparatus may further determine first rate-matching parameters for the first resource set and second rate-matching parameters for the second resource set, and may process the control channel using the common set of aggregation levels and the first and second rate-matching parameters. | 05-08-2014 |
20140126497 | TECHNIQUES FOR DECOUPLING DOWNLINK AND UPLINK OPERATIONS - Techniques are provided for decoupling uplink and downlink operations. According to certain aspects, a wireless node (e.g., a low power node) may receive, from a base station of a first cell, signaling indicating a random access channel (RACH) configuration for a wireless device. The wireless node may then detect the wireless node performing a RACH detection (based on the RACH configuration) and report the RACH detection and desired UL configuration to the base station of the first cell. The base station of the first cell may then select the wireless node for serving the wireless device for UL operations (e.g., based on the reported RACH detection-and similar reports from other wireless nodes detecting the same RACH procedure). | 05-08-2014 |
20140133367 | CONTROL CHANNEL MANAGEMENT FOR RELAY BACKHAUL - Aspects of the present disclosure provide techniques for managing control channels for relays that utilize half-duplex operation. According to certain aspects, a certain type of PDCCH may be selected based on one or more criteria. | 05-15-2014 |
20140133370 | PUCCH RESOURCE DETERMINATION FOR EPDCCH - Methods, systems, and devices are described for indexing control channel elements to determine uplink channel resources. Downlink control messages may be monitored in a set of downlink subframes. The monitoring may include monitoring physical downlink control channel (PDCCH) messages in at least one of the subframes and monitoring enhanced physical downlink control channel (EPDCCH) messages in at least one of the subframes. A downlink control message may be received in at least one subframe. The downlink control message may include an EPDCCH message. An index for enhanced control channel elements (ECCEs) may be determined based at least in part on the set of downlink subframes. The determined index of the ECCEs may be used to identify uplink control channel resources. The ECCEs may be indexed in a manner that is specific to a cell in a wireless communication system, or which is configured for a particular mobile device. | 05-15-2014 |
20140177519 | REFERENCE SIGNAL RECEPTION AND CHANNEL STATE INFORMATION DETERMINATION FOR MULTIPLE NODES IN A WIRELESS COMMUNICATION NETWORK - Techniques for receiving reference signals from multiple nodes and determining channel state information (CSI) for the nodes are disclosed. A user equipment (UE) may determine and report CSI for the multiple nodes to support data transmission to the UE. The nodes may transmit reference signals based on different configurations. The configuration for each node may indicate when, where, and how the node transmits its reference signal. The UE may determine CSI for different nodes and/or different combinations of nodes based on the reference signals transmitted by these nodes as well as an indication of which subframes to use to determine each CSI reported by the UE. The UE may report different CSIs for different subframes and may receive data transmission sent by a single node or a combination of nodes based on the reported CSIs. | 06-26-2014 |
20140177602 | UPLINK TIMING MANAGEMENT AND UPLINK POWER CONTROL - Certain aspects of the present disclosure relate to techniques for uplink timing management and uplink power control in wireless communications systems. A UE may detect a switch in a set of one or more transmission points (TPs) for at least one of uplink (UL) transmissions or (DL) transmissions. The uplink timing management may include the UE determining one or more DL component carriers (CCs) to use as a Timing Advance (TA) reference after the switch. The uplink power control may include a UE determining, based at least in part on one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch. | 06-26-2014 |
20140185540 | ENB PDCCH IMPLEMENTATION TO AVOID AMBIGUOUS DCI INFORMATION - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines a first decoding candidate in a first search space and a second decoding candidate in a second search space, where the first decoding candidate and the second decoding candidate have a same size but different definitions of information fields, identifies a difference in the information fields, and determines one of the first decoding candidate and the second decoding candidate as a valid candidate based on the identified difference. The apparatus further generates first control information for transmitting in a first search space, codes the first control information, wherein the code applied to the first control information is specific to the first search space and different from code applied to second control information in a second search space, and transmits the coded first control information in the first search space. | 07-03-2014 |
20140185541 | ENB PDCCH IMPLEMENTATION TO AVOID AMBIGUOUS DCI INFORMATION - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus determines a first starting index for transmitting first control information in a first search space, determines a second starting index for transmitting second control information in a second search space, and transmits the second control information in the second search space at the second starting index when the first starting index and the second starting index are not the same value. The apparatus further transmits to a user equipment (UE) control information in a first search space, receives information from the UE corresponding to the transmitted control information, and decodes the received information based on the UE parsing the control information according to the first search space and based on the UE incorrectly parsing the control information according to a second search space. | 07-03-2014 |
20140192732 | IDENTIFYING MODULATION AND CODING SCHEMES AND CHANNEL QUALITY INDICATORS - Methods, systems, and devices are described for wireless communications. The use of at least two channel quality indicator (CQI) tables is supported. One of the at least two CQI table is identified. The identified CQI table is used to generate a CQI value for a wireless channel. In addition, the use of at least two modulation and coding scheme (MCS) tables is supported. A transmission is received via a wireless channel. One of the at least two MCS tables is identified to use for the received transmission. Further, a transport block size (TBS) table is identified that is mapped from the identified MCS table. The identified TBS table is used to determine a size of the received transmission. | 07-10-2014 |
20140198663 | METHODS AND APPARATUS FOR POWER EFFICIENT OPERATION OF LTE BASED MACHINE TYPE COMMUNICATIONS - Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to techniques for power efficient operation of LTE MTC. A method is provided wireless communications by a user equipment (UE). The method generally includes signaling information regarding traffic requirements for the UE to a base station (BS) for use in persistent scheduling (PS), receiving signaling from the BS indicating PS opportunities of traffic for the UE, powering on the radio components for the PS opportunities, and powering down radio components between PS opportunities when traffic is not expected. | 07-17-2014 |
20140198664 | METHODS AND SYSTEM FOR RESOURCE MANAGEMENT IN TTI (TRANSMISSION TIME INTERVAL) BUNDLING FOR IMPROVED PHASE CONTINUITY - Certain aspects of the present disclosure propose methods for improving phase continuity in an uplink transmit time interval (TTI) bundle. A first method may include identifying a segment of UL subframes in the TTI bundle and maintaining substantially the same transmit power/timing/frequency when transmitting data to a node over the segment of UL subframes in the TTI bundle. Another method may include ignoring reception of downlink subframes for a duration of the TTI bundle. | 07-17-2014 |
20140198677 | CHANNEL STATE INFORMATION AND ADAPTIVE MODULATION AND CODING DESIGN FOR LONG-TERM EVOLUTION MACHINE TYPE COMMUNICATIONS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The UE determines CSI. The UE determines whether to send the CSI based on at least one of a timer or a threshold. The UE sends the CSI upon determining to send the CSI. The UE may send the CSI in a MAC header upon determining to send the CSI. When the UE determines whether to send the CSI based on the threshold, the UE may determine whether to send the CSI based on a difference between the CSI and reference CSI. The UE may determine the reference CSI based on at least one of previously reported CSI, fixed CSI, or an MCS of a received data transmission from a base station. The UE may send CSI to the base station in an initial connection setup with the base station. | 07-17-2014 |
20140198685 | BROADCAST AND PAGING CHANNELS FOR MACHINE TYPE COMMUNICATION - Methods, systems, and devices are described for facilitating Machine Type Communication in a wireless communications system. Link budget-limited MTC devices, may be supported. An MTC physical broadcast channel may be utilized for the Machine Type Communication. The MTC physical broadcast channel may be transmitted over one or more subframes different from a regular physical broadcast channel. The payload for the MTC physical broadcast channel may be reduced. The MTC physical broadcast channel may also be utilized to indicate the presence of paging and/or to indicate a change in system information. Some embodiments utilize one or more MTC-specific system information blocks. The MTC-specific system information blocks may combine and/or simplify multiple system information blocks. The location of the MTC system information blocks may be predetermined or information about their location may be transmitted over the MTC physical broadcast channel. An enhanced paging channel may be used to indicate system information updates. | 07-17-2014 |
20140198720 | ANTENNA PORT MANAGEMENT FOR LOCALIZED ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL TRANSMISSIONS - Methods, systems, and devices are described for managing wireless communications. A first decoding candidate and a second decoding candidate are identified from a plurality of decoding candidates for a localized enhanced Physical Downlink Control Channel (EPDCCH) transmission. A first antenna port is identified from a set of antenna ports for the first decoding candidate. A second antenna port is identified from the set of antenna ports for the second decoding candidate. The second antenna port is different from the first antenna port. The localized EPDCCH is decoded based at least on the first and second decoding candidates and the identified first and second antenna ports. | 07-17-2014 |
20140198726 | BROADCAST AND SYSTEM INFORMATION FOR MACHINE TYPE COMMUNICATION - Methods, systems, and devices are described for facilitating Machine Type Communication in a wireless communications system. Link budget-limited MTC devices, may be supported. An MTC physical broadcast channel may be utilized for the Machine Type Communication. The MTC physical broadcast channel may be transmitted over one or more subframes different from a regular physical broadcast channel. The payload for the MTC physical broadcast channel may be reduced. The MTC physical broadcast channel may also be utilized to indicate the presence of paging and/or to indicate a change in system information. Some embodiments utilize one or more MTC-specific system information blocks. The MTC-specific system information blocks may combine and/or simplify multiple system information blocks. The location of the MTC system information blocks may be predetermined or information about their location may be transmitted over the MTC physical broadcast channel. An enhanced paging channel may be used to indicate system information updates. | 07-17-2014 |
20140198749 | TRANSMISSION AND PROCESSING OF HIGHER ORDER MODULATION - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The UE identifies properties associated with reference signals of a received payload. The properties associated with reference signals of the received payload may include a reference signal structure and/or a traffic to pilot ratio. The UE determines a payload structure based on the identified properties. Subsequently, the UE decodes the received payload based on the determined payload structure. The UE may receive mapping information indicating a mapping between possible properties associated with reference signals and possible payload structures. The UE may determine the payload structure further based on the received mapping information. The UE may receive the mapping information through a broadcast or RRC signaling. | 07-17-2014 |
20140204848 | METHODS AND APPARATUS FOR RESOLVING AMBIGUOUS USER EQUIPMENT (UE) CAPABILITY SIGNALING - Certain aspects of the present disclosure generally relate to resolving ambiguous user equipment (UE) capability signaling. According to certain aspects, a method for wireless communications by a UE is provided. The method generally includes determining capabilities of the UE to support at least one of multiple-input multiple-output (MIMO) or coordinated multipoint (CoMP) features on different operating frequency bands of a radio access network (RAN), signaling, to a base station (BS) of the RAN, a first combination of capabilities of the UE for a combination of bands, signaling, to the BS, a second combination of capabilities, different than the first combination of capabilities, for the combination of bands, and identifying, based on or more criteria, a particular combination of capabilities to be used to communicate with the BS. In certain aspects, the UE may identify the combination of capabilities to use by applying a deterministic rule. | 07-24-2014 |
20140204849 | ENHANCED CONTROL CHANNEL ELEMENT (ECCE) BASED PHYSICAL DOWNLINK SHARED CHANNEL (PDSCH) RESOURCE ALLOCATION FOR LONG-TERM EVOLUTION (LTE) - Aspects of the present disclosure provide techniques and apparatus for enhanced control channel element (ECCE) based physical downlink shared channel (PDSCH) resource allocation for long-term evolution (LTE). A method is provided for wireless communications by a user equipment (UE). The method generally includes determining resources assigned for a data channel, based on a resource granularity associated with a control channel and processing the data channel transmissions in a subframe based on the determination. The data channel may comprise a PDSCH. According to certain aspects, the UE may receive downlink control information (DCI) having a number of bits indicating VRBs assigned for PDSCH. Each VRB may include ECCEs from the same or different enhanced resource element group (EREG). ECCEs may span multiple PRB pairs or the same PRB pair. The UE may perform rate matching around enhanced physical downlink control channel (EPDCCH) overlapping assigned PDSCH resources. | 07-24-2014 |
20140204851 | ENHANCED PHYSICAL BROADCAST CHANNEL FOR NEW CARRIER TYPE IN LONG TERM EVOLUTION - Aspects of the present disclosure provide techniques and apparatus for enhanced physical broadcast channel (PBCH) for new carrier type (NCT) in long term evolution (LTE). According to certain aspects, a method for wireless communications by a base station (BS) is provided. The method generally includes generating an enhanced physical broadcast channel (EPBCH) using a frequency division multiplexed (FDM) structure, wherein the EPBCH spans substantially a subframe duration and transmitting the EPBCH. | 07-24-2014 |
20140204856 | EFFICIENT UPLINK RESOURCE INDICATION FOR CSI FEEDBACK - Channel state information (CSI) feedback reporting is disclosed for multi-cell downlink cooperation networks. In such networks, when a user equipment (UE) has little uplink data traffic, CSI feedback is triggered by the serving base station through a downlink grant to the UE. The UE detects the CSI feedback trigger placed by the base station in the downlink grant and selects a set of uplink resources based, at least in part, on the downlink grant. | 07-24-2014 |
20140204881 | Systems, Apparatus and Methods for Facilitating Frequency Reuse for Downlink Control Channels - Systems and methods for frequency reuse on downlink control channels (DLCCs) are provided. One method can include determining a first number of symbols to support transmission of control information on a DLCC, and configuring a second number of symbols for transmission of the control information on the DLCC, wherein the second number of symbols is greater than the first number of symbols. The method can also include assigning a number of DLCCs based on the second number of symbols, and transmitting control information over an assigned number of DLCCs to achieve an effective reuse factor less than one. Another method can include identifying fractions of bandwidth in a system having cells, and allocating at least one of the cells to at least one of the fractions of bandwidth in a system. Resource element groups allocated to the fractions of bandwidth can be coordinated across cells to provide frequency reuse. | 07-24-2014 |
20140204919 | MULTIPLE POWER CONTROL AND TIMING ADVANCE LOOPS DURING WIRELESS COMMUNICATION - A method of wireless communication includes receiving a signal from an base station. The method also includes determining a timing advance loop from a set of timing advance loops, and/or a power control loop from a set of power control loops. The determination is based on the received signal. | 07-24-2014 |
20140211701 | COMMON REFERENCE SIGNAL PHASE DISCONTINUITY AND SEQUENCE INITIALIZATION - Methods, systems, and devices are described for supporting common reference signaling in wireless communications systems. Some configurations introduce a phase discontinuity between common reference signal (CRS) transmissions on different subframes. This may address issues that may arise when a reduced CRS periodicity is utilized. Indicators may also be transmitted from base stations to user equipment (UEs) to indicate whether phase continuity may be assumed or not. Some configurations may support CRS sequence initialization. These tools and techniques may utilize an extended CRS sequence periodicity, which may increase the number of CRS sequences transmitted by a cell. | 07-31-2014 |
20140233530 | METHODS AND APPARATUS FOR ACCESSING DORMANT CELLS - A method, a computer program product, and an apparatus are provided. The apparatus may be a UE. The UE receives an information block from a first base station while camped on a second base station. In an aspect, the information block includes an indication of a random access configuration for performing at least a part of a random access procedure. The UE determines to reselect to the first base station from the second base station. The UE performs at least a part of a random access procedure with the first base station based on the indicated random access configuration to reselect from a second base station to the first base station. | 08-21-2014 |
20140235243 | ACTIVATION PROCEDURE FOR DORMANT CELLS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The UE receives synchronization signals and an information block from a first base station. The information block includes information indicating whether the first base station is in a dormant state or an active state. The UE detects the first base station based on the received synchronization signals and on the information indicating whether the first base station is in the dormant state or the active state. The UE may receive, from a second base station, an indication of resources for detecting the first base station. The synchronization signals and the information block may be received in the indicated resources. The UE may move to the first base station from a second base station in a handoff from the second base station to the first base station. | 08-21-2014 |
20140241149 | SYSTEMS AND METHODS FOR SYNCHRONIZING WIRELESS COMMUNICATION DEVICE CONFIGURATIONS - An apparatus operable in a communication system is described. The apparatus includes means for sending a connection reconfiguration message using a first configuration. The apparatus also includes means for receiving an acknowledgement message using the first configuration. The apparatus also includes means for applying a second configuration as indicated in the acknowledgement message. The apparatus also includes means for sending a connection reconfiguration complete message uplink grant in a common search space. The apparatus also includes means for receiving a connection reconfiguration complete message using the second configuration. | 08-28-2014 |
20140241294 | Method and apparatus for communication with shortened signal formats - Techniques for addressing high interference observed by a receiver in a wireless communication system are disclosed. The receiver may observe different interference power levels across a transmission symbol. In an aspect, the receiver applies different weights to different portions of the transmission symbol to account for fluctuation of interference power across the transmission symbol. In another aspect, a transmitter may send a transmission symbol such that a receiver can ignore a portion of a symbol period with high interference. In one design, the transmitter generates a transmission symbol including at least two copies of a signal component. The transmitter transmits at least one copy of the signal component in a portion of the symbol period in which the receiver does not observe high interference. The receiver processes the at least one copy of the signal component to recover data sent in the transmission symbol. | 08-28-2014 |
20140247781 | METHOD AND APPARATUS FOR MTC DEVICE ASSOCIATION SCHEMES - Methods and apparatuses are described for wireless communications in which various association schemes may be performed for a machine type communication (MTC) device. In a long-term evolution (LTE) heterogeneous network, the MTC device may associate with a macro cell or a small cell using a narrowband MTC channel supported by the cells. Information about the MTC channel, including its frequency spectrum, may be transmitted to the MTC device using reserved bits in a physical broadcast channel (PBCH). Once the MTC device identifies the MTC channel, it may communicate with one or more cells during a frame or during a sub-frame. The MTC device may determine channel metrics of the cells from the MTC communication and may identify a cell with which to associate from the channel metrics. The association may be to a best downlink cell or a best uplink cell based on the operating profile of the MTC device. | 09-04-2014 |
20140254509 | METHODS AND APPARATUS FOR MULTI-SUBFRAME SCHEDULING - Methods, systems, and devices are described for scheduling transmissions for multiple subframes in a single scheduling operation. Scheduling information is provided in a multi-subframe scheduling information transmission for a set of subframes. Differences in characteristics for subframes under the multi-subframe information are determined, and one or more properties for communication during the one or more subframes may be adjusted based on subframe characteristics. Such multi-subframe scheduling may allow for reduced overhead for scheduling uplink or downlink transmissions. | 09-11-2014 |
20140254701 | SYSTEMS AND METHODS FOR ENHANCED MIMO OPERATION - A method for channel state information (CSI) reporting by a wireless communication device is described. The method includes determining a codebook for a CSI report corresponding to four transmit antenna (4Tx) transmissions from a base station. The codebook has a dual codebook structure. The method also includes generating the CSI report using the codebook. The method further includes transmitting the CSI report to a base station. | 09-11-2014 |
20140293971 | EMPLOYING NEIGHBORING CELL ASSISTANCE INFORMATION FOR INTERFERENCE MITIGATION - Certain aspects of the present disclosure relate to methods and apparatus for employing a neighboring cell's assistance information for interference mitigation (e.g., by conveying the information to a user equipment). A base station (BS) may determine assistance information for a neighboring cell and convey it to a user equipment (UE). A UE may receive assistance information for a neighboring cell and use that information for performing interference cancellation or suppression on received signals. The UE may receive the assistance information from a serving cell or a non-serving cell. The assistance information may be valid for a particular transmission instance, for a known period of time, or until updated by a BS. | 10-02-2014 |
20140301251 | INTERFERENCE CANCELLATION/SUPPRESSION IN TDD WIRELESS COMMUNICATIONS SYSTEMS - A wireless user equipment (UE) may receive a downlink transmission from a base station in a first subframe of a first subframe configuration, and determine that a neighboring base station is operating according to a second subframe configuration. The UE may modify interference operations for the downlink transmission in the first subframe based on the determination to account for the neighboring base station operating according to the different subframe configuration. Modifying interference operations may include, for example, skipping interference operations, applying different interference operations to a subframe or a portion of a subframe, or a combination thereof. Modifying interference operations may be based on one or more characteristics of the neighboring base station communications. | 10-09-2014 |
20140301268 | NETWORK ASSISTED INTERFERENCE CANCELLATION/SUPPRESSION FOR MULTIPLE SERVICES - Certain aspects of the present disclosure relate to methods and apparatus for network assisted interference cancellation (IC) and interference suppression (IS) for multiple services. According to aspects a user equipment (UE) may determine information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service. The UE may perform interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals. | 10-09-2014 |
20140301271 | CHANNEL STATE INFORMATION REFERENCE SIGNAL (CSI-RS) HANDLING FOR NETWORK ASSISTED INTERFERENCE CANCELLATION - A method of wireless communication includes transmitting channel state information reference signal (CSI-RS) configuration information to a user equipment (UE). The CSI-RS configuration information is transmitted so that the UE may mitigate interference caused by interfering CSI-RSs. The CSI-RS configuration may be a CSI-RS configuration of a neighbor cell. | 10-09-2014 |
20140301292 | TPR MANAGEMENT FOR EPDCCH IN LTE - For an enhanced physical downlink control channel (EPDCCH), unlimited traffic-to-pilot ratio (TPR) variations across resource elements of a physical resource block (PRB) pair is problematic because of the detrimental affect the variations will have on the ability of a user equipment (UE) to perform inter-cell/intra-cell interference suppression (IS) and/or interference cancellation (IC) on EPDCCH of an interfering cell. A TPR limitation is placed on EPDCCH to facilitate IS/IC without causing practical limitations on EPDCCH management by an eNB. Accordingly, a method, an apparatus, and a computer program product for wireless communication are provided. The apparatus identifies a plurality of resource elements of at least one PRB pair for transmitting one or more control channels, divides the plurality of identified resource elements into one or more groups, and restricts a plurality of resource elements in a respective group to a TPR. | 10-09-2014 |
20140301293 | CONTROL CHANNEL OVERHEAD ASSUMPTIONS FOR DERIVING CSI FEEDBACK - Determination of channel state information (CSI) feedback by mobile devices is disclosed in which the mobile device receives one or more configuration parameters, that may include one or more control channel parameters for configuring a mobile device control channel. The UE uses the configuration parameters to determine an assumption of overhead resources. Using this overhead assumption, the mobile device derives the CSI index and transmits the CSI index to a serving base station. | 10-09-2014 |
20140301297 | ADAPTIVE ANTENNA MANAGEMENT IN LTE - Certain aspects of the present disclosure relate to methods and apparatus for adaptive antenna management in LTE. Devices and networks capable of transmitting and receiving signals using a variable number of transmitting or receiving antennas using LTE radio access technology are described. | 10-09-2014 |
20140301298 | METHODS AND APPARATUS FOR TRANSMISSION RESTRICTION AND EFFICIENT SIGNALING - Certain aspects of the present disclosure relate to methods and apparatus for transmission restriction and efficient signaling. A base station (BS) may determine information regarding a restricted set of system parameters used for transmission from at least one of the serving BS or one or more potentially interfering BSs and signal the information to a user equipment (UE). According to certain aspects, a UE may receive the signaling of information regarding the restricted set of system parameters used for transmission from at least one of the serving BS or the one or more potentially interfering BSs and use the information to cancel interference by transmissions from the one or more potentially interfering BSs or serving BS. | 10-09-2014 |
20140301302 | ENHANCED TRANSMISSION TIME INTERVAL BUNDLING DESIGN FOR MACHINE TYPE COMMUNICATIONS - Aspects of the present disclosure provide techniques for enhanced transmission time interval (TTI) bundling design for machine type communications (MTC). A method for wireless communications by a wireless device is provided. The method generally includes determining a mapping of one or more uplink or downlink channels to one or more fixed bundling sizes, wherein each of the one or more fixed bundling sizes indicates a number of transmission time intervals (TTIs) over which a channel should be transmitted and processing transmission of the one or more uplink or downlink channels based on the mapping. | 10-09-2014 |
20140301305 | PHYSICAL BROADCAST CHANNEL (PBCH) COVERAGE ENHANCEMENTS FOR MACHINE TYPE COMMUNICATIONS (MTC) - Aspects of the present disclosure provide techniques and apparatus for physical broadcast channel (PBCH) coverage enhancements, for example, for machine type communications (MTC). In aspects, the PBCH coverage enhancements may be applied by non-MTC devices. A method for wireless communications typically performed by a base station (BS) is provided. The method generally includes determining a set of resources for a new physical broadcast channel (PBCH) with enhanced coverage relative to a legacy PBCH and communicating to at least one user equipment (UE) based on the determined set of resources for the new PBCH. In aspects, the new PBCH may be transmitted on a subframe allocated for communicating with MTC devices (MTC subframe). | 10-09-2014 |
20140302863 | VIRTUAL CELL MANAGEMENT FOR INTERFERENCE SUPPRESSION AND INTERFERENCE CANCELLATION IN LTE - In some aspects, a method for performing wireless communication includes configuring a set of virtual cells for user equipments (UEs). One or more virtual cells of the set is associated with at least one set of parameters. The method also includes transmitting information, to the UEs, regarding the set of the virtual cells, and operating, for a same virtual cell, according to a same set of parameters for some or all of the UEs. In other aspects, a method for performing wireless communications includes receiving, from a node, information regarding, for a UE, a set of virtual cells associated with a set of parameters. The method also includes communicating with the node. The communication is based on a virtual cell and its associated set of parameters. | 10-09-2014 |
20140307595 | METHODS AND APPARATUS FOR EMPLOYING MULTIPLE SUBFRAME CONFIGURATIONS FOR HARQ OPERATIONS - Certain aspects of the present disclosure relate to methods and apparatus for employing multiple subframe configurations. A UE may identify a first reference subframe configuration (RSC) to use as a reference for hybrid automatic repeat request (HARQ) operations for transmissions on an uplink, and a second RSC to use as a reference for HARQ operations for transmissions on a downlink. The UE may communicate with at least a node on the uplink and the downlink based on the first and second RSCs. In aspects, a base station (BS) may identify a first RSC to use as a reference for HARQ operations for transmissions on an uplink, identify a second RSC to use as a reference for HARQ operations for transmissions on a downlink, and communicate with at least one UE on the uplink and the downlink based on the first and second RSCs. | 10-16-2014 |
20140307646 | ENHANCED ANTENNA MANAGEMENT FOR UPLINK OPERATION UNDER CARRIER AGGREGATION IN LTE - A method of wireless communications includes configuring, by a user equipment (UE), uplink (UL) transmissions on one or more UL component carriers (CCs) by assigning one or more UE transmit antennas to each of the one or more CCs as a function of the number of UL CCs simultaneously involved in the UL transmissions. The method additionally includes transmitting the UL transmissions on the configured one or more CCs. In other aspects, a method of wireless communications includes scheduling, by a base station and for a UE, UL transmissions on one or more CCs based on a number of UL transmit antennas of the UE and as a function of a number of UL CCs simultaneously involved in the UL transmissions. The method additionally includes receiving at least one of the UL transmissions on at least one of the scheduled one or more CCs. | 10-16-2014 |
20140307703 | PRECODER RESOURCE BUNDLING INFORMATION FOR INTERFERENCE CANCELLATION IN LTE - Methods, systems, and devices are described for interference cancellation/interference suppression (IC/IS) of neighbor cell transmissions. A UE may receive a downlink transmission from a base station and also receive interfering signals from one or more neighboring base stations. The UE may be configured to perform IC/IS operations on the interfering signals. In order to enhance IC/IS operations, the UE may evaluate whether resource bundling is used for the interfering signals. The UE may modify IC/IS operations for one or more subframes responsive to the evaluation. Modifying IC/IS operations may include, for example, using information related to the bundling at the neighboring base station(s) to cancel the interfering signals from the base station(s). | 10-16-2014 |
20140307820 | ENHANCED ANTENNA MANAGEMENT BY A BASE STATION - Enhanced antenna management for nodes is described in which transmit antennas assigned to at least one first carrier are designated for usage in a second carrier. The nodes transmit various signals and reference signals using a set of antenna ports on the second carrier based on the combined physical antennas associated with the first inactive carriers and physical antennas associated with the second carrier. | 10-16-2014 |
20140313997 | UTILIZING UNUSED UPLINK SEQUENCE SHIFTS FOR SIGNALING - Certain aspects of the present disclosure propose methods and apparatus for signaling information via the selection of resources used for an uplink transmission. The aspects may include selecting one or more cyclic shifts or orthogonal cover codes used to transmit an uplink channel. The one or more cyclic shifts or orthogonal cover codes may be selected to convey information. The information may be conveyed by transmitting the uplink channel using the selected cyclic shifts or orthogonal cover codes. | 10-23-2014 |
20140313999 | CONTROL-LESS OPERATION FOR COVERAGE LIMITED MACHINE-TYPE-COMMUNICATIONS - Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to techniques for control-less operation for machine-type communications (MTC). | 10-23-2014 |
20140314007 | PDSCH TRANSMISSION SCHEMES WITH COMPACT DOWNLINK CONTROL INFORMATION (DCI) FORMAT IN NEW CARRIER TYPE (NCT) IN LTE - Certain aspects of the present disclosure relate to physical downlink shared channel (PDSCH) transmission schemes with compact downlink control information (DCI) format in new carrier type (NCT) in long term evolution (LTE). | 10-23-2014 |
20140321370 | RATE MATCHING UNDER IRREGULAR, SPARSE, OR NARROWBAND SIGNALS - Aspects of the present disclosure relate to techniques that may be utilized to perform rate matching in networks which utilize sparsely or irregularly transmitted signals/channels. | 10-30-2014 |
20140334299 | OVERLOAD CONTROL AND SUPERVISION FOR WIRELESS DEVICES - Methods, systems, and/or devices are described for are provided for transmission overload control and/or supervision of wireless devices. Tools and techniques may be provided for resolving issues associated with numerous wireless devices connected to a base station. For example, a transmission cycle for an uplink channel may be identified where the transmission cycle is discontinuous. Scheduling request and or Random Access Channel messages may be transmitted from a wireless device based on the discontinuous transmission cycle. Tools and techniques are also provided that may involve supervision of numerous wireless devices. Supervision may, for example, involve keep-alive messages transmitted in accordance with a timer. The supervision may be based on determination of, and transmissions related to, a list or lists of connected wireless devices. In some cases, the wireless devices may be delay tolerant. The wireless devices may include UEs that may have long sleep cycles and/or machine-type communications (MTC) devices. | 11-13-2014 |
20140334397 | ENHANCED PDSCH OPERATION - An enhanced data transmission operation is disclosed in which PDSCH and/or EPDCCH may be transmitted in the first symbol either with or without legacy control information multiplexed with the data transmissions. Base stations operating according to the various aspects may transmit indicators to related mobile devices that identify when such PDSCH/EPDCCH are transmitted in the first symbol period. UEs receive the multiplexed data transmissions and decode the appropriate PDSCH/EPDCCH transmissions along with any multiplexed legacy control information. | 11-13-2014 |
20140334399 | METHODS AND APPARATUS FOR NETWORK SYNCHRONIZATION - Certain aspects relate to techniques and apparatus for network synchronization by network listening. Aspects include transmitting a synchronization signal for a base station (BS) to use for acquiring synchronization with the network. Aspects include listening for a synchronization signal from a BS to use for acquiring network synchronization. In aspects, a method for wireless communications by a BS is provided. The method generally includes acquiring synchronization with a network based on a first synchronization signal transmitted from a primary BS or a secondary BS, determining a synchronization stratum for the BS based on whether the BS acquired synchronization with the network from the primary BS or from the secondary BS, and transmitting a second synchronization signal for one or more other BS s to use for acquiring synchronization with the network, wherein the transmitting is based, at least in part on the determined synchronization stratum. | 11-13-2014 |
20140334400 | EFFICIENT DOWNLINK OPERATION FOR EIMTA - Certain aspects of the present disclosure provide techniques for wireless communications and, more particularly, to techniques that may be utilized, for example, to achieve efficient downlink (DL) operations for enhanced interference management for traffic adaptation (eIMTA) in long term evolution (LTE). | 11-13-2014 |
20140334402 | COORDINATED MULTIPOINT (CoMP) AND NETWORK ASSISTED INTERFERENCE SUPPRESSION/CANCELLATION - A method of wireless communications identifies a first virtual cell identity. The method also includes determining one or more virtual cells based on the identified first virtual cell identity. The method further includes processing one channel based on the determination. | 11-13-2014 |
20140341018 | TECHNIQUES FOR SELECTING SUBFRAME TYPE OR FOR INTERLEAVING SIGNALS FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes comparing past transmission activity on an unlicensed spectrum to an activity threshold, transmitting a first subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is greater than the activity threshold, and transmitting a second subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is lesser than the activity threshold, the second subframe type comprising a more robust subframe type than the first subframe type. A second method includes generating one or both of PUCCH signals and PUSCH signals based on interleaved signals that increase nominal bandwidth occupancy in an unlicensed spectrum, and transmitting the generated signals in the unlicensed spectrum. A third method includes receiving the PUCCH signals and the PUSCH signals. | 11-20-2014 |
20140341024 | CONCURRENT WIRELESS COMMUNICATIONS OVER LICENSED AND UNLICENSED SPECTRUM - Methods and apparatuses are described for wireless communications. A first method includes transmitting a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal to a wireless node in a licensed spectrum, and transmitting, concurrently with the transmission of the first OFDMA communications signal, a second OFDMA communications signal to the wireless node in an unlicensed spectrum. A second method includes receiving a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal from a wireless node in a licensed spectrum, and receiving, concurrently with the reception of the first OFDMA communications signal, a second OFDMA communication signal from the wireless node in an unlicensed spectrum. A third method includes generating a periodic gating interval for a cellular downlink in an unlicensed spectrum, and synchronizing at least one boundary of the periodic gating interval with at least one boundary of a periodic frame structure associated with a primary component carrier of the cellular downlink. | 11-20-2014 |
20140341035 | BEACON TRANSMISSION OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes broadcasting beacon signals in an unlicensed spectrum at predetermined times from an evolved Node B (eNB). A second method includes receiving beacon signals broadcast in an unlicensed spectrum at predetermined times from an eNB. The beacon signals may include downlink signals identifying the eNB and at least one associated attribute of the eNB. | 11-20-2014 |
20140341050 | CHANNEL ESTIMATE UNDER NON-UNIFORM REFERENCE SIGNAL PATTERN - Reference signals may not uniformly span over time and/or frequency on a resource unit. For example, reference signals may non-uniformly occupy symbols of a subframe. Alternatively, reference signals normally transmitted over certain tones of a subframe may have to be punctured to avoid collisions with a PSS and/or SSS transmitted over the same tones. Consequently, a UE may only be able to use a subset of reference signal tones for performing channel estimation. Accordingly, a method, an apparatus, and a computer program product for wireless communication are provided for improving channel estimation under a non-uniform signal pattern. The apparatus indicates to a UE to utilize a subset of reference signals to derive a channel estimate for demodulating data in a specific subframe, and transmits a plurality of subframes, the plurality of subframes including the reference signals and the specific subframe, the specific subframe including a PSS and/or SSS. | 11-20-2014 |
20140341051 | CHANNEL STATE INFORMATION (CSI) MEASUREMENT AND REPORTING FOR ENHANCED INTERFERENCE MANAGEMENT FOR TRAFFIC ADAPTATION (EIMTA) IN LTE - Certain aspects of the disclosure generally relate to wireless communications and, more particularly, to techniques for channel state information (CSI) measurement and reporting for enhanced interference management for traffic adaptation (eIMTA) in long term evolution (LTE). According to certain aspects, a method for wireless communications by a user equipment (UE) is provided. The method generally includes identifying, within a set of subframes, one or more flexible subframes that may be dynamically managed for either uplink or downlink communications, determining whether a current flexible subframe is for either uplink or downlink communications, and performing at least one of channel measurement, interference measurement, or channel state reporting based on the determination. | 11-20-2014 |
20140341053 | WIRELESS FEEDBACK COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes receiving feedback information from a user equipment (UE) via a primary component carrier (PCC) uplink in a licensed spectrum. A second method includes transmitting feedback information from a UE to an evolved Node B (eNB) via a PCC uplink in a licensed spectrum. The feedback information may address signals transmitted to the UE via a downlink in an unlicensed spectrum | 11-20-2014 |
20140341135 | COLLISION AVOIDANCE SCHEME FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum, transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available, and receiving, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal. A second method includes transmitting an RTS signal in an unlicensed spectrum or a V-RTS signal in a licensed spectrum, addressed to a set of UEs, and transmitting a CTS-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal. | 11-20-2014 |
20140341207 | LISTEN-BEFORE-TALK RESERVATION SCHEME FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes synchronizing clear channel assessment (CCA) slots across a plurality of base stations to determine availability of an unlicensed spectrum for transmissions in a next transmission interval. A second method includes performing a CCA during one of a plurality of CCA slots synchronized across a plurality of evolved Node Bs (eNBs) to determine availability of unlicensed spectrum for transmissions in a next transmission interval. | 11-20-2014 |
20140342745 | GATING SCHEME FOR WIRELESS COMMUNICATION OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. One method includes performing a clear channel assessment (CCA) for an unlicensed spectrum in a current gating interval to determine whether the unlicensed spectrum is available for a transmission in a next transmission interval, and gating OFF the transmission in the unlicensed spectrum for the next transmission interval when the determination is that the unlicensed spectrum is unavailable. | 11-20-2014 |
20140349701 | UPLINK POWER HEADROOM MANAGEMENT FOR CONNECTIVITY WITH LOGICALLY SEPARATE CELLS - Power headroom management in uplink carrier aggregation for connectivity with logically separate cells of a wireless communications system is performed by a network entity, alone or in combination with another network entity, one or more mobile entities, or both. This may include determining an uplink power allocation across at least two independently controlled cells of a wireless communication network for a mobile entity served by at least two independently controlled cells of a wireless communication network, subject to a total PH constraint for uplink transmissions by the mobile entity. A network entity may then manage PH reporting for determining the uplink power allocation by the uplink serving cells, based on the determined uplink power allocation. Managing the PH reporting may be performed by at least one of: explicit coordination between the at least two independently controlled cells, implicit coordination between the at least two independently controlled cells, or configuring PH reporting from the mobile entity by at least one of the at least two independently controlled cells. | 11-27-2014 |
20140357310 | UPLINK POWER CONTROL FOR WIRELESS COMMUNICATION - Certain aspects of the present disclosure provide closed loop and open loop power control techniques for each antenna of the user equipment (UE). The access point may measure the received signals from each antenna of the user equipment, calculate a power adjustment parameter for each antenna of the UE, and transmit the parameters to the UE. The UE may use the adjustment parameters to determine the transmit power value for each antenna. In addition, the UE may measure the path loss for each antenna and update the transmit power per antenna based on the path loss and other parameters. | 12-04-2014 |
20150029877 | DISCOVERY SIGNALS FOR LTE - Aspects of the present disclosure relate to techniques that may be utilized in networks with relatively dense deployments of small cells and/or various other types of cells, each of which may or may not support a dormancy cell operation. | 01-29-2015 |
20150029903 | TRANSMISSION TIME INTERVAL (TTI) BUNDLING FOR PHYSICAL DOWNLINK SHARED CHANNEL (PDSCH) - Certain aspects of the present disclosure propose techniques for transmission time interval (TTI) bundling for physical downlink shared channel (PDSCH) in long term evolution (LTE). According to certain aspects a method is provided for wireless communications. The method may be performed, for example, by a user equipment (UE). The method generally includes identifying a transmit time interval (TTI) bundle comprising a subset of subframes from a set of subframes for transmitting data on a physical downlink shared channel (PDSCH) and receiving the data on the PDSCH in the subset of subframes. | 01-29-2015 |
20150029923 | CONNECTED MODE DESIGN WITH BUNDLING CONSIDERATIONS - Aspects of the present disclosure provided techniques that may be applied in systems that utilize bundled transmissions from a base station (e.g., an eNodeB) to a user equipment (UE), when a user equipment (UE) is in a connected mode of operation. An exemplary method performed by a UE for processing a downlink control channel sent as a bundled transmission over a bundle of subframes, comprises determining when to start monitoring for the control channel; and monitoring for the control channel in a limited number of downlink subframes, based on the determination. | 01-29-2015 |
20150029953 | TRANSMISSION TIME INTERVAL (TTI) BUNDLING FOR CONTROL CHANNELS IN LONG TERM EVOLUTION (LTE) - Certain aspects of the present disclosure propose techniques for transmission time interval (TTI) bundling for control channels (e.g., physical downlink control channel (PDCCH) and enhanced PDCCH) in long term evolution (LTE). According to certain aspects a method is provided for wireless communications. The method may be performed, for example, by a user equipment (UE). The method generally includes determining a first set of possible decoding candidates for the downlink control channel in a first subframe of the bundle of subframes and a second set of possible decoding candidates for the downlink control channel in a second subframe in the bundle of subframes, wherein the first set of possible decoding candidates and the second set of possible decoding candidates are different and processing the bundle of subframes based, at least in part, on the determination. | 01-29-2015 |
20150031382 | PAGING A USER EQUIPMENT OVER UNLICENSED SPECTRUM - Methods and apparatus for paging comprise receiving data destined for a UE. The methods and apparatus further comprise determining a short identity for the UE relative to a longer global user equipment identity and identifying a MIB transmission based on a short identity. Moreover, the methods and apparatus comprise activating a bit within a slot of the MIB transmission to indicate that the user equipment listen for a page in order to receive the data and broadcasting the MIB. In other aspects, methods and apparatus for receiving a page comprise entering an idle state while camped on a cell. The methods and apparatus further comprise waking up from the idle state to monitor a slot of a MIB for a paging indication. Moreover, the methods and apparatus comprise recognizing the paging indication in the monitored slot of the MIB, determining a paging window based on correlation information in a SIB and waking up to listen for a page during the paging window. | 01-29-2015 |
20150043523 | TRANSMISSION AND RECEPTION OF COMMON CHANNEL IN AN UNLICENSED OR SHARED SPECTRUM - Methods, systems, and apparatuses are described for wireless communications, in which transmission of common information to two or more receivers over unlicensed spectrum may be provided. The common information may be transmitted over a number (e.g., a set) of different carrier frequencies of the unlicensed spectrum. A staggering pattern may be employed to transmit all or a part of the common information across each of the carrier frequencies in the set of carrier frequencies. The detection of the information on one of the carrier frequencies may provide information that may be used to derive the staggering pattern. The duration of the common information transmission on each of the carrier frequencies may be selected such that a clear channel assessment (CCA) to determine availability of the unlicensed spectrum is not required. | 02-12-2015 |
20150049626 | ENABLING COORDINATED MULTIPOINT (COMP) OPERATION - Aspects of the present disclosure relate to techniques that may help enable coordinated multipoint (CoMP) operation for devices designed to operate in systems that do not explicitly support CoMP. | 02-19-2015 |
20150049708 | HARQ DESIGN FOR LTE IN UNLICENSED SPECTRUM UTILIZING INDIVIDUAL ACK/NACK - Methods, systems, and apparatuses are described for wireless communications. In one method, a sequence number corresponding to a data frame and one or more data subframes of the data frame may be transmitted over an unlicensed spectrum to a user equipment (UE), and hybrid automatic repeat request (HARQ) feedback for the one or more data subframes may be received over the unlicensed spectrum, from the UE, when the sequence number corresponding to the data frame is received by the UE in a specified order. In another method, a sequence number corresponding to a data frame and HARQ feedback may be transmitted over an unlicensed spectrum to a UE, and one or more data subframes may be received over the unlicensed spectrum, from the UE, in response to the HARQ feedback when the sequence number corresponding to the data frame is received by the UE in a specified order. | 02-19-2015 |
20150049709 | GROUP ACK/NACK FOR LTE IN UNLICENSED SPECTRUM - Methods, systems, devices, and apparatuses are described for wireless communications. In one method, a set of one or more data subframes of a data frame may be transmitted over an unlicensed spectrum, to a user equipment (UE), during a transmission period. A group hybrid automatic repeat request (HARQ) feedback message for a plurality of data subframes including at least one of the data subframes in the set of one or more data subframes may then be received over the unlicensed spectrum, from the UE, during the transmission period. In another method, a set of one or more data subframes of a data frame may be received over an unlicensed spectrum during a transmission period. A group HARQ feedback message for a plurality of data subframes including at least one of the data subframes in the set of one or more data subframes may then be transmitted over the unlicensed spectrum during the transmission period. | 02-19-2015 |
20150049712 | Uplink Procedures For LTE/LTE-A Communication Systems With Unlicensed Spectrum - Long term evolution (LTE)/LTE-Advanced (LTE-A) deployments with unlicensed spectrum leverage more efficient LTE communication aspects over unlicensed spectrum, such as over WIFI radio access technology. In order to accommodate such communications, various uplink procedures may be modified in order to handle communications between licensed and unlicensed spectrum with LTE/LTE-A deployments with unlicensed spectrum. | 02-19-2015 |
20150049741 | Downlink Procedures For LTE/LTE-A Communication Systems With Unlicensed Spectrum - Long term evolution (LTE)/LTE-Advanced (LTE-A) deployments with unlicensed spectrum leverage more efficient LTE communication aspects over unlicensed spectrum, such as over WIFI radio access technology. In order to accommodate such communications, various downlink procedures may be modified in order to handle communications between licensed and unlicensed spectrum with LTE/LTE-A deployments with unlicensed spectrum. | 02-19-2015 |
20150055588 | CSI AND ACK REPORTING ENHANCEMENTS IN LTE/LTE-A WITH UNLICENSED SPECTRUM - Channel state information (CSI) and acknowledgement (ACK) reporting enhancements in Long Term Evolution (LTE)/LTE-Advanced (LTE-A) enabling communications over an unlicensed spectrum are disclosed. For example, ACK/NAK may include unlicensed spectrum interference information, such as WIFI interference. Additionally, in anticipation of a future downlink transmission, UEs may report WiFI interference to base stations absent a current downlink transmission. Also, CSI-RS and/or IMR resources may be staggered across subframes and/or within slots of subframes. Further, CSI reporting may include separate reports for CSI-RS resources that experience unlicensed spectrum interference and interference free CSI-RS resources. Still further, CSI reports may include a request to the base station to switch the current channel or band. Finally, inter-RAT ACK and CSI reporting may be provided on a second unlicensed spectrum band, such as a WIFI band, for a first unlicensed spectrum band, such as an LTE/LTE-A unlicensed band. | 02-26-2015 |
20150055589 | COMMON HARQ PROCESSES - A sharing of common hybrid automatic repeat request (HARQ) process space by multiple unlicensed spectrum component carriers is described. Because communication access is not guaranteed over the unlicensed spectrum, a set of component carriers in the unlicensed spectrum is assigned to share a common HARQ process space, such that uplink or downlink data will be transmitted over any one or more of the set of component carriers that clear a clear channel assessment (CCA) check. The receiver then provides a HARQ process response over the same HARQ process space using the grouped component carriers that share that common HARQ process space. Thus, any one or more of the set of component carriers sharing the common HARQ process space may both carry the transmitted data and carry the HARQ process response to the attempted data transmission. | 02-26-2015 |
20150063262 | SUBFRAME DEPENDENT PHYSICAL UPLINK CONTROL CHANNEL (PUCCH) REGION DESIGN - According to certain aspects, resources allocated to a user equipment (UE) for physical uplink control channel (PUCCH) transmissions may be determined in a subframe-type dependent manner. As a result, PUCCH regions for different subframes may vary based on the subframe types. | 03-05-2015 |
20150067435 | RESOURCE MAPPING TO HANDLE BURSTY INTERFERENCE - Resource mapping and coding schemes to handle bursty interference are disclosed that provide for spreading the modulated symbols for one or more transmission code words over more symbols in the time-frequency transmission stream. Certain aspects allow for the modulated symbols to be based on bits from more than one code word. Other aspects also provide for re-mapping code word transmission sequences for re-transmissions based on the number of re-transmissions requested by the receiver. Additional aspects provide for layered coding that uses a lower fixed-size constellation to encode/decode transmissions in a layered manner in order to achieve a larger-size constellation encoding. The layered encoding process allows the transmitter and receiver to use different coding rates for each coding layer. The layered encoding process also allows interference from neighboring cells to be canceled without knowledge of the actual constellation used to code the interfering neighboring signal. | 03-05-2015 |
20150071220 | TRANSMITTER MANAGEMENT UNDER TRANSMITTER UNCERTAINTY - Management of transmitters is disclosed for conditions of transmission uncertainty that arises in operating over non-guaranteed transmission carriers that are required to perform listen-before-talk (LBT) processes and guaranteed transmission carriers that are LBT-exempt. Due to the hardware and software constraints, techniques are described to pre-prepare data and control transmissions or provide the transmitters additional time to prepare for such data and control transmissions based on the results of clear channel assessment (CCA) checks of the non-guaranteed transmission carriers. | 03-12-2015 |
20150078188 | UPLINK CHANNEL DESIGN WITH COVERAGE ENHANCEMENTS - Aspects of the present disclosure provide techniques for providing uplink channel coverage enhancements for wireless devices. An example method generally includes determining a power difference value based on a target preamble received power level and a maximum preamble transmit power level, selecting a bundling size for uplink transmissions based on the determined difference, and sending the uplink transmissions, in accordance with the selected bundling size. | 03-19-2015 |
20150078300 | COVERAGE ENHANCEMENTS FOR PHYSICAL BROADCAST CHANNEL (PBCH) - Certain aspects of the present disclosure generally relate to wireless communications, and more specifically, coverage enhancements for physical broadcast channel (PBCH). According to certain aspects, a method is provided for wireless communications by a user equipment (UE). The method generally includes receiving a physical downlink shared channel (PDSCH) transmission, receiving a different type downlink transmission, with transmit power boosted relative to the PDSCH transmission, receiving information regarding relative transmit power of the PDSCH transmission relative to a common reference signal (CRS) based on the transmit power of the different type downlink transmission, and processing the PDSCH transmission based on the information. | 03-19-2015 |
20150085718 | SIMPLIFIED FDD-TDD CARRIER AGGREGATION - Methods, systems, and devices are described for multi-carrier communications involving one or more TDD component carriers and one or more FDD component carriers in a wireless communications network. Some described embodiments are directed to systems and methods for multi-carrier communications for a half-duplex device. The described methods, systems, and devices may simplify multi-carrier communications, such as the determination of hybrid automatic repeat request (HARQ) and/or scheduling timing with FDD+TDD carrier aggregation. | 03-26-2015 |
20150085720 | REDUCED DELAY HARQ PROCESS TIMELINE FOR FDD-TDD CARRIER AGGREGATION - Methods, systems, and devices for multi-carrier scheduling in wireless communications networks. The described techniques may be employed to minimize hybrid automatic repeat requests (HARQ) delay in a wireless communications network utilizing one or more TDD component carriers and one or more FDD component carriers. Scheduling of TDD uplink (UL) and downlink (DL) may be determined based on an FDD component carrier. A number of HARQ processes may be determined for a TDD component carrier based on DL/UL configuration of the TDD component carrier. Scheduling may include overwriting certain HARQ transfers. The described techniques may apply to any TDD DL/UL configuration. | 03-26-2015 |
20150085793 | SEQUENCE MAPPING FOR LTE/LTE-A WITH UNLICENSED SPECTRUM - Sequence mapping for reference signal is disclosed in which the reference signal sequence at the fixed set of resource blocks around a predetermined common frequency is generated to be independent from the system bandwidth. The reference signal sequence may be generated around the predetermined common frequency or may be configured based on a cell identifier. Either such solution provides a system bandwidth independent means for a user equipment (UE) to detect the reference signal sequence for decoding a bandwidth information bearing signal received from the communicating base station. | 03-26-2015 |
20150085794 | UPLINK RESOURCE ALLOCATION AND TRANSPORT BLOCK SIZE DETERMINATION OVER UNLICENSED SPECTRUM - Methods and apparatus for determining a transport block size include identifying data to be transmitted on an uplink, wherein the data is associated with a number of resource blocks. The methods and apparatus further include receiving at least one indicated coefficient via a downlink control information. Additionally, the methods and apparatus include determining at least one coefficient based on the at least one indicated coefficient and calculating a transport block size column index based on the number of resource blocks and the at least one coefficient. Moreover, the methods and apparatus include determining the transport block size based at least in part on the transport block size column index. The methods and apparatus may transmit the data on the uplink based at least in part on the transport block size. | 03-26-2015 |
20150085796 | FLEXIBLE OPERATION OF ENHANCED TTI-BUNDLING MODES IN LTE - A method, an apparatus, and a computer program product for wireless communication are provided. At least two hybrid automatic repeat request (HARQ) processes are selected from among a plurality of HARQ processes within a round trip time. The at least two selected HARQ processes are combined to transmit the same data in a combined transmission. The at least two selected HARQ processes may be continuous within the round trip time, or offset within the round trip time. In the case of offset HARQ processes, the offset between the at least two selected HARQ processes may allow for early termination of the combined transmission. For example, an ACK of a first of the selected HARQ processes may terminate the transmission of a second of the selected HARQ processes. | 03-26-2015 |
20150085797 | LTE-U UPLINK WAVEFORM AND VARIABLE MULTI-SUBFRAME SCHEDULING - Uplink waveforms for operating long term evolution (LTE) in an unlicensed band (i.e., long term evolution-unlicensed (LTE-U) communication) are disclosed. Carrier aggregation (CA) and standalone (SA) are disclosed. LTE on the licensed channel may provide both control and data, LTE on the unlicensed channel may provide data. Managing variable transmission time interval (TTI) continuous transmission is disclosed for transmission over multiple subframes of an unlicensed carrier in LTE-U. Listen-before-talk (LBT) requirements of unlicensed carriers provide for additional channel occupancy constraints when scheduling resources for multiple UEs for variable TTI continuous uplink transmissions over multiple subframes. A joint control channel is disclosed that provides control information for all of the potentially available subframes to be scheduled for the uplink transmissions. In addition to management of the variable TTI continuous transmissions, adjustments to uplink signal parameters are also disclosed that address the constraints due to the LBT requirements of unlicensed carriers. | 03-26-2015 |