Patent application number | Description | Published |
20130064200 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - To provide a base station apparatus, a mobile terminal apparatus and a communication control method supporting respectively a plurality of mobile communication systems coexist mutually. The base station apparatus in a radio communications system in which an LTE-A system and an LTE system are placed so as to coexist with each other, the LTE-A system having a system band composed of a plurality of component carriers, the LTE system having a system band composed of a single component carrier, the base station apparatus is configured to generate ACK/NACK of HARQ to uplink transmission of a plurality of the component carriers, set offset as 0 to the component carrier used in the LTE system, set the offset to be increased beginning at the aforementioned component carrier in order of being circuited among the plurality of the component carriers, and add the aforementioned offset to the allocation resource of ACK/NACK. | 03-14-2013 |
20130070664 | RADIO RELAY STATION APPARATUS, RADIO BASE STATION APPARATUS AND RELAY FREQUENCY ALLOCATION METHOD - To control a radio link capacity in a backhaul link optimally, and to enhance a throughput in an access link, in the radio communications system using the relay transmission technology. A relay frequency allocation method according to the present invention includes: determining whether or not carrier aggregation is to be applied in a backhaul link from a radio base station apparatus to a mobile terminal device under the command of the radio base station apparatus, and/or an access link from a radio relay station apparatus to a mobile terminal device under the command of the radio relay station apparatus; allocating a frequency band for transmitting a downlink signal in the backhaul link and/or the access link, when applying the carrier aggregation; and transmitting the downlink signal with the allocated frequency band in the backhaul link and/or the access link. | 03-21-2013 |
20130077518 | BASE STATION APPARATUS, MOBILE STATION APPARATUS AND REFERENCE SIGNAL TRANSMISSION METHOD - The present invention is designed to perform CQI measurement for adjacent cells without making the processes in the user terminal UE complex. A base station apparatus (eNodeB # | 03-28-2013 |
20130077576 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - To partially suppress interference to control channels of a pico-cell from a base station apparatus of a macro-cell and enable assignment of user data to a subframe besides the same subframe using a part of control channels with interference suppressed thereto, a base station apparatus disposed in a second system having a system band comprised of a plurality of component carriers for sharing at least a part of a frequency band with a first system having a macro-cell (C | 03-28-2013 |
20130084879 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - To provide a base station apparatus, mobile terminal apparatus and communication control method for enabling control adapted to interference inside a Heterogeneous network to be performed to support the next-generation mobile communication system, a base station apparatus ( | 04-04-2013 |
20130094433 | RADIO RELAY STATION APPARATUS AND MOBILE TERMINAL APPARATUS - A radio relay station apparatus and a mobile terminal apparatus that, even if a radio relay station apparatus is provided, can reduce the amount of interference from the radio relay station apparatus and increase the throughput, are provided. The radio relay station apparatus of the present invention decides the number of mobile terminal apparatuses under the subject cell and controls transmission power based on this number of mobile terminal apparatuses, or measures the received power of the signal from another radio relay station apparatus or a radio base station apparatus and controls transmission power based on this received power. | 04-18-2013 |
20130100828 | TRANSMISSION POWER CONTROL METHOD AND MOBILE STATION APPARATUS - The present invention is directed to providing a transmission power control method and a mobile station apparatus that can adequately control the transmission power of a mobile station apparatus having a plurality of transmitting antennas. Uplink transmission power control for a mobile station apparatus having a plurality of transmitting antennas provides a step of measuring the path loss (PL) of at least one transmitting antenna in a plurality of transmitting antennas, a step of setting representative value path loss (PL′) based on the measured path loss values, a step of determining the total transmission power (P | 04-25-2013 |
20130102307 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL DEVICE, AND CELL SELECTING METHOD - To provide a cell selecting method in which an optimal cell can be selected in the case of relay transmission. The cell selecting method includes: in a radio base station apparatus, determining a specified sub-frame including data for measuring reception quality in a mobile terminal device; and in a mobile terminal device, measuring first reception quality using a reference signal of the specified sub-frame transmitted from the radio base station apparatus and second reception quality using a reference signal of the specified sub-frame transmitted from the radio base station apparatus through a radio relay station apparatus, and transmitting the first reception quality and the second reception quality to the radio base station apparatus; and in the radio base station apparatus, selecting a cell to which the mobile terminal device is connected using the first reception quality and the second reception quality, and transmitting information on the selected cell to the mobile terminal device. | 04-25-2013 |
20130107836 | BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD | 05-02-2013 |
20130109297 | RADIO RELAY STATION APPARATUS AND RADIO RELAY METHOD | 05-02-2013 |
20130109384 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD | 05-02-2013 |
20130150060 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a base station apparatus, a mobile terminal apparatus and a communication control method that support a next-generation mobile communication system and are capable of controlling in an adaptive manner to interference in a heterogeneous network. Provided is a room base station apparatus ( | 06-13-2013 |
20130156015 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - Provided are a base station apparatus, a mobile terminal apparatus and a communication control method capable of selecting a CSI-RS arrangement flexibly in accordance with a system configuration. The base station apparatus has a CSI-RS arrangement section ( | 06-20-2013 |
20130156121 | INTER-BASE-STATION COOPERATED MIMO TRANSMITTING METHOD AND BASE STATION APPARATUS - A decrease in a transmission capacity is suppressed even when CSI is not fed back from a mobile station apparatus to all cooperating base station apparatuses. A base station apparatus (BS | 06-20-2013 |
20130157704 | MOBILE STATION APPARATUS AND SIGNAL DETECTION AND CHANNEL ESTIMATION METHOD - To cancel interference from the other cells and improve throughput characteristics without needing complicated processing, provided are a reception section that receives a reception signal including signal components from a plurality of base station apparatuses (BSs), and a signal detection and channel estimation section ( | 06-20-2013 |
20130170423 | INTERFERENCE REDUCTION METHOD AND RADIO BASE STATION - In a radio communication system in which a micro cell is provided in a macro cell, when a user terminal that is connected to the macro base station is located in the micro cell, interference signals which the user terminal receives from the micro base station are reduced. With the interference reduction method of the present invention, a user terminal UE that is connected to a macro base station (eNB) forming a macro cell transmits interference information indicating the interference signal power which the user terminal (UE) receives from a micro base station (HeNB) forming a micro cell, to the macro base station (eNB), when the interference signal power indicated by the interference information meets a predetermined condition, the macro base station (eNB) reports that to the micro base station (HeNB), and, in response to the report from the macro base station (eNB), the micro base station (HeNB) transmits data using a transmission frame in which interference signals from the micro base station (HeNB) at the user terminal (UE) can be reduced. | 07-04-2013 |
20130176978 | SIGNALING METHOD OF CSI-RS AND BASE STATION APPARATUS - To signal CSI-RS location indexes indicative of CSI-RS location positions in a resource block with high efficiency, a signaling method of CSI-RS is characterized by having the steps of locating a CSI-RS that is a reference signal for downlink channel estimation in resources for CSI-RS reserved to transmit the CSI-RS, generating a CSI-RS location index indicative of a location position of the CSI-RS located in the resources for CSI-RS, in the CSI-RS location index an index pattern varies corresponding to the number of CSI-RS ports so that an index pattern of the relatively low number of CSI-RS ports is a subset of an index pattern of the relatively high number of CSI-RS ports, and transmitting the generated CSI-RS location index to a mobile terminal apparatus. | 07-11-2013 |
20130182648 | SIGNALING METHOD, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION SYSTEM - To provide a signaling method for enabling position information of muting resources to be signaled with a simplified configuration, base station apparatus and mobile terminal apparatus, the signaling method is characterized by having the steps of setting blank resources for a CSI-RS (Channel State Information-Reference Signal) that is a reference signal for downlink channel estimation, and transmitting a bitmap indicative of a position of the blank resources to a mobile terminal apparatus. | 07-18-2013 |
20130208650 | RELAY TRANSMISSION METHOD, RELAY STATION AND RADIO BASE STATION - Provided is a radio communication system using a relay transmission technique capable of optimizing use of radio resources in a radio base station and preventing reduction in capacity of the whole system. The relay frequency allocation method of the present invention has the steps of: radio base stations ( | 08-15-2013 |
20130210431 | RADIO BASE STATION APPARATUS AND TRANSMISSION POWER CONTROL METHOD - With this transmission power control method, in a radio base station apparatus ( | 08-15-2013 |
20130223264 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a base station apparatus, a mobile terminal apparatus and a communication control method which can improve the accuracy of channel quality estimation. A communication control method includes the steps of: arranging a CSI-RS, which is a reference signal for downlink channel estimation, in resources of subframes for CSI-RS transmission; setting, in the subframes for CSI-RS transmission, resources to which the CSI-RS is allocated in neighboring areas, to be muting resources; and reporting transmission interval information, which indicates a transmission interval of subframes that are set at the same timing in a transmission cycle of a subframe for CSI-RS transmission in a subject area and in a transmission cycle of a subframe for CSI-RS transmission in the neighboring areas, to a mobile terminal apparatus. | 08-29-2013 |
20130237235 | MOBILE COMMUNICATION METHOD AND RADIO BASE STATION - A mobile communication method according to the present invention includes a step A of notifying, by a radio base station eNB, a mobile station UE during communication in a subordinate cell #1 of “CSI-RS/Muting configuration information” indicating a transmission method of CSI-RS; and a step B of performing, by the mobile station UE, a reception process on the basis of the “CSI-RS/Muting configuration information”. | 09-12-2013 |
20130250798 | MOBILE COMMUNICATION METHOD, RADIO BASE STATION, AND MOBILE STATION - A mobile communication method according to the present invention includes a step A of transmitting, by a mobile station UE# | 09-26-2013 |
20130258976 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a base station apparatus, a mobile terminal apparatus and a communication control method which can improve the accuracy of channel quality estimation. A communication control method includes the steps of: allocating a CSI-RS (Channel State Information-Reference Signal), which is a reference signal for downlink channel estimation, in resources for the CSI-RS that are defined for CSI-RS transmission; setting to muting resources in the resources for the CSI-RS; and reporting parameters to specify the CSI-RS, including at least a transmitting subframe cycle, a subframe offset and transmission power, to a mobile terminal apparatus. | 10-03-2013 |
20130279358 | MOBILE TERMINAL APPARATUS, BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a mobile terminal apparatus, a base station apparatus, and a communication control method, which allow control suitable for interference reduction in a layered network such as HetNet, and which support a next-generation mobile communication system. A mobile terminal apparatus has a receiving section ( | 10-24-2013 |
20130279440 | MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - To prevent a situation that communication operation becomes unstable resulting from erroneous detection of a PDCCH in a mobile communication system having a system band comprised of a plurality of base frequency blocks, in a mobile terminal apparatus ( | 10-24-2013 |
20130286996 | RADIO BASE STATION APPARATUS AND CONTROL INFORMATION DETECTION METHOD - To efficiently detect feedback control information on downlink shared data channel signals transmitted with a plurality of base frequency blocks also in the case of performing radio communications with a system band comprised of a plurality of base frequency blocks, it is a feature to have detecting sections ( | 10-31-2013 |
20130294271 | MOBILE TERMINAL APPARATUS, BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a mobile terminal apparatus, a base station apparatus, and a communication control method, which allow control suitable for interference reduction in a layered network such as HetNet, and which support a next-generation mobile communication system. A mobile terminal apparatus has a receiving section ( | 11-07-2013 |
20130294277 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND RADIO COMMUNICATION METHOD - Provided are a radio base station apparatus, a mobile terminal apparatus and a radio communication method capable of taking other-cell interference mitigation measures even in consideration of inter-cell coordination like CoMP. The radio communication method according to the present invention is characterized by, in a radio base station apparatus, generating notification information including subframe information of a serving cell and subframe information of another cell; and transmitting the notification information to a mobile terminal apparatus connected to the serving cell as a connected cell; and in the mobile terminal apparatus, receiving the notification information including the subframe information of the connected cell and the subframe information of another cell; and measuring channel quality of the connected cell with use of the subframe information of the connected cell and measuring channel quality of another cell with use of the subframe information of another cell. | 11-07-2013 |
20130294279 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided are a mobile terminal apparatus, a radio base station apparatus and a radio communication method capable of making the most of the effects of the MIMO technique and the CoMP technique, when employing both of the techniques. According to the radio communication method of the present invention, a mobile terminal apparatus estimates downlink channel states using respective reference signals included in downlink signals from plural cells; selects PMIs using a codebook based on the channel states; estimates a phase difference between the cells based on the selected PMIs or the channel states; and transmits information of the phase difference and the selected PMIs to radio base station apparatuses of the respective cells. A radio base station apparatus receives an uplink signal including a PMI and the information of the phase difference between the cells; multiplies a transmission signal by a precoding weight corresponding to the PMI; adjusts the phase difference between the cells with use of the information of the phase difference between the cells; and transmits the transmission signal to a radio base station apparatus of another cell by coordinated multi-point transmission. | 11-07-2013 |
20130301445 | RADIO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION METHOD - Provided are a radio base station, a user terminal and a radio communication method capable of making accurate measurement in various network configurations in HetNet. The radio communication method according to the present invention has, in a heterogeneous network having a network configuration where a macro cell overlays a micro cell that is smaller than the macro cell, a radio base station that forms the macro cell and is connected to a macro terminal under control of the macro cell determining a measurement subframe to measure a CRS based on the network configuration, generating a time reference indicating the measurement subframe and transmitting a signal including the time reference and the CRS to the macro terminal; and the macro terminal receiving the time reference and the CRS and measuring the CRS in the measurement subframe indicated by the time reference. | 11-14-2013 |
20130308540 | COMMUNICATION CONTROL METHOD, MOBILE COMMUNICATION SYSTEM AND MOBILE TERMINAL APPARATUS - The present invention is designated to reduce the deterioration of transmission characteristics upon data transmission, even when soft buffer memory for retransmission control is not sufficiently secured in a mobile terminal apparatus. The present invention provides the steps of, in a base station apparatus (eNB), performing channel coding of information bits (ST | 11-21-2013 |
20130308607 | USER TERMINAL, RADIO BASE STATION AND RADIO COMMUNICATION METHOD - In order to transmit a paging to a user terminal with high quality, transmit a CSI-RS effectively and perform UL HARQ efficiently in HetNet, the present invention provides a radio communication method having the steps of: a micro base station which is arranged in a macro cell and forms a smaller micro cell than the macro cell, transmitting, to a user terminal, a signal having a CSI-RS subframe including a CSI-RS and a paging subframe including modification notification information indicating modification in system information and a control signal indicating not to measure a CSI-RS when the CSI-RS subframe and the paging subframe collide with each other; and the user terminal determining a CSI-RS subframe to measure the CSI-RS based on the control signal when the CSI-RS subframe and the paging subframe collide with each other. | 11-21-2013 |
20130322392 | MICRO BASE STATION, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to reduce interference from a macro base station to a small transmission power node. The present invention is characterized in providing a micro base station which forms, in a macro cell where a macro base station transmits a signal to a macro terminal, a micro cell where the micro base station transmits a signal to a micro terminal under control with low power, and this micro base station generates a PDCCH which includes downlink or uplink resource allocation information, and, in a non-transmission period in which the macro base station stops transmitting signals while leaving minimal quality measurement signals, shifts the transmission starting symbol of the PDCCH to a position where the PDCCH does not overlap the quality measurement signals. | 12-05-2013 |
20130336149 | USER EQUIPMENT AND MEASUREMENT METHOD - A user equipment ( | 12-19-2013 |
20130336150 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention makes it possible to transmit and receive CSI-RSs adequately even when the number of CSI-RSs increase following the increase of antennas. The present invention provides a base station apparatus ( | 12-19-2013 |
20130336270 | RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - To effectively improve the reception quality in a pico-base station, while preventing throughput of a macro-base station from significantly deteriorating, a macro-base station (M-BS) is provided with a beam generating section ( | 12-19-2013 |
20130343270 | NOTIFICATION METHOD, USER TERMINAL AND RADIO BASE STATION - In order to assure reception of broadcast information by a user terminal handed over to a micro base station by CRE (Cell Range Expansion) and to reduce the number of transmission stopped subframes in a macro base station, the present invention provides a notification method for a user terminal to receive modification notification information for notifying modification in system information from the micro base station, the notification method including: the macro base station notifying the micro base station of a subframe pattern including a protection subframe to protect the modification notification information every a plurality of radio frames; and the micro base station notifying the user terminal of identification information of the protection subframe in the subframe pattern. | 12-26-2013 |
20140003271 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION CONTROL METHOD | 01-02-2014 |
20140023009 | APERIODIC CHANNEL STATE INFORMATION REPORTING METHOD, RADIO BASE STATION APPARATUS AND USER TERMINAL - In order to report aperiodic channel state information (A-CSI) flexibly even when a user terminal performs radio communication using a plurality of component carriers (CCs) in an HetNet environment, the present invention provides an aperiodic channel sate information reporting method comprising: a step of transmitting in advance, from a pico base station (PeNB) to pico UE, channel state measurement target information having information about presence or absence of reporting of channel state information and a subframe as a measurement target associated with trigger bit information indicating information about presence or absence of reporting of channel state information and a component carrier as a measurement target (step ST | 01-23-2014 |
20140056247 | BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - To reduce interference that a user terminal connecting to a base station apparatus forming a large-scale cell undergoes from a base station apparatus forming a small-scale cell in a radio communication system in which the small-scale cell is provided in the large-scale cell, a femto-base station forming a femto-cell provided in a macro-cell receives cell identification information of a macro-base station, determines cell identification information of the femto-base station based on the received cell identification information of the macro-base station so as to reduce interference to a control format indicator channel assigned to radio resources by the macro-base station, and controls assignment of control channels to radio resources based on the determined cell identification information of the femto-base station. | 02-27-2014 |
20140064244 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - The present invention is designed to provide a base station apparatus, a mobile terminal apparatus, a communication system and a communication method that cope with the shortage of downlink control channel capacity. For a mobile terminal apparatus that receives downlink signals using a resource region for downlink control signals and a resource region for downlink data signals, a base station apparatus is configured to set a plurality of virtual to resources for downlink control signals in a plurality of physical resources that are arranged in a frequency direction in the resource region for downlink data signals, and allocate the downlink control signals, in a distributed manner, between virtual resources of a relatively low frequency band side and virtual resources of a relatively high frequency band side in a plurality of virtual resources. | 03-06-2014 |
20140073341 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM - The present invention is designated to improve received quality in a mobile terminal apparatus when coordinated multiple-point transmission (CoMP)—in particular, DCS-CoMP—is adopted. With the radio communication method of the present invention, when dynamic cell selection-type coordinated multiple-point transmission is adopted, a radio base station apparatus increases transmission power in radio resources to transmit to a mobile terminal apparatus, transmits the increased transmission power to the mobile terminal apparatus as transmission power information and performs dynamic cell selection-type coordinated multiple-point transmission at the increased transmission power. | 03-13-2014 |
20140086189 | USER TERMINAL, RADIO BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - To provide a user terminal, radio base station apparatus, radio communication system and radio communication method that support increases in the number of users, a user terminal is provided with a reception section that receives a downlink control signal multiplexed into radio resources from the starting OFDM symbol to a predetermined OFDM symbol in a subframe, and a downlink control signal subjected to frequency division multiplexing with a downlink data signal into radio resources after the predetermined OFDM symbol, a retransmission check section that performs a retransmission check on the downlink data signal based on the downlink control signal subjected to frequency division multiplexing to output a retransmission response signal, and a selection section that selects a radio resource of an uplink control channel used in transmission of the retransmission response signal. | 03-27-2014 |
20140086201 | USER TERMINAL, RADIO BASE STATION, DOWNLINK CONTROL CHANNEL RECEIVING METHOD AND MOBILE COMMUNICATION SYSTEM - The present invention is designed such that it is possible to optimize the effect of improving the efficiency of use of radio resources even when the number of user terminals to be multiplexed over the same radio resources is further increased. A user terminal performs downlink communication with a radio base station using a PDCCH resource region and a PDSCH resource region. The user terminal detects the starting position of the radio resources where the PDSCH and the PDCCH are frequency-division-multiplexed in the PDSCH resource region in the time direction, and receives the PDCCH that is frequency-division-multiplexed over the radio resources starting from the detected starting position. | 03-27-2014 |
20140086202 | RADIO BASE STATION APPARATUS, USER TERMINAL APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - To provide a radio base station apparatus that enables the effect of improving usage efficiency of radio resources to be exerted sufficiently also in the case where the number of user terminals multiplexed into the same radio resources further increases, the radio base station apparatus performs communications using a first resource region for a downlink control channel subjected to time division, and a second resource region for a downlink data channel, and is characterized by being provided with generation sections ( | 03-27-2014 |
20140112253 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM - To enable a mobile terminal apparatus to correctly demodulate a data signal in the case of applying Coordinated Multi-Point transmission (CoMP), particularly, JP-CoMP, a radio communication method of the invention is characterized in that a radio base station apparatus generates information for demodulation of a data signal in a mobile terminal apparatus in applying Coordinated Multi-Point transmission, and transmits the information for demodulation to a mobile terminal apparatus that performs Coordinated Multi-Point reception, and that the mobile terminal apparatus receives the information for demodulation of a data signal, and demodulates the data signal subjected to Coordinated Multi-Point reception using the information for demodulation. | 04-24-2014 |
20140133418 | CHANNEL STATE INFORMATION REPORTING METHOD, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION SYSTEM - The present invention is designed to flexibly report aperiodic channel state information to a plurality of radio base station apparatuses to be coordinated, even when coordinated multiple-point (CoMP) transmission/reception is performed. | 05-15-2014 |
20140133434 | USER TERMINAL, RADIO BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to minimize the increase of user terminal power consumption even when downlink control channels are extended. A radio base station apparatus having: an allocation section that allocates downlink control information in a first control region from a top of a radio frame to a predetermined OFDM symbol and in a second control region that is frequency-divided with a data region in a region that is time-divided with the first control region, and also allocates decoding control information that indicates a user terminal to perform a decoding process for the second control region, in the first control region; and a transmission section that transmits the downlink control information and the decoding control information; and a user terminal having: a receiving section that receives the downlink control information and the decoding control information from the radio base station apparatus; and a decoding section that controls the decoding process for the second control region based on the decoding control information received, are provided. | 05-15-2014 |
20140140316 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, RADIO BASE STATION APPARATUS AND USER TERMINAL - The present invention is designed to apply CoMP transmission/reception flexibly in a system band that is formed with a plurality of fundamental frequency blocks, improve received quality in user terminals, and also widen the system band. A first radio base station apparatus ( | 05-22-2014 |
20140177466 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION AND RADIO COMMUNICATION METHOD - The present invention is designed to execute adequate signaling even when individual user terminals perform communication to support separate types of communication, in MIMO transmission to use antennas having varying antenna configurations depending on the type of communication. A radio base station ( | 06-26-2014 |
20140179363 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to provide a radio communication system which can control uplink transmission power adequately even in an HetNet environment. A radio communication system having a first radio base station apparatus and a second radio base station apparatus that is configured to able to communicate with the first radio base station apparatus is provided; and, in this radio communication system, the first radio base station apparatus has a first communication quality measurement section that measures the received quality of an uplink reference signal transmitted from a user terminal, and generates first received quality information, and a reporting section that reports the first communication quality information to the second radio base station apparatus, and the second radio base station apparatus has a second communication quality measurement section that measures the received quality of the uplink reference signal transmitted from the user terminal, and generates second communication quality information, a correction value determining section that determines a correction value for the transmission power of the user terminal on the uplink based on the first communication quality information and the second communication quality information, and a reporting section that reports the determined correction value to the user terminal. | 06-26-2014 |
20140192758 | COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND COMMUNICATION METHOD - The present invention is designed to use frequency resources effectively, even in the situation where a plurality of mobile terminal apparatuses of varying capabilities coexist. A communication system, in which a mobile terminal apparatus ( | 07-10-2014 |
20140192761 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to reduce the space to install antennas and still increase the system capacity despite the state of the distribution of user terminals in cells. According to the radio communication method of the present invention, a radio base station apparatus selects precoding vectors from a codebook that is set in advance to be uneven with respect to the direction of the arrangement of antenna elements, based on communication quality information of the user terminals in the cell, multiplies signals to supply to each antenna element by the selected precoding vectors, and transmits the signals multiplied by the precoding vectors to the user terminals, and the user terminal receives a signal from the radio base station apparatus, extracts a reference signal from the received signal and measures channel quality; and feeds back a communication quality feedback signal, including the measured channel quality, to the radio base station apparatus, via the uplink. | 07-10-2014 |
20140211731 | RADIO BASE STATION, USER TERMINAL, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to reduce the increase in the amount of the calculation process in a mobile station and the amount of CSI feedback data, and also prevent the amount of overall system capacity from decreasing. This radio communication system ( | 07-31-2014 |
20140233519 | RADIO COMMUNICATION SYSTEM, FEEDBACK METHOD, USER TERMINAL, AND RADIO BASE STATION APPARATUS - The present invention is designed to feed back channel state information, from which adequate received quality can be calculated, upon CoMP transmission. A radio communication system is provided, which includes a plurality of radio base station apparatuses and a user terminal which is configured to be able to communicate with the plurality of radio base station apparatuses, and, in this radio communication system, a radio base station apparatus (eNB) has a transmission section configured to transmit a reference signal for channel state measurement to a user terminal (UE), and a receiving section configured to receive channel state information generated in the user terminal (UE) based on the reference signal, and the user terminal (UE) has a channel state information generating section configured to be able to generate a plurality of pieces of channel state information, including channel state information from which interference from a coordinated cell is cancelled, when the plurality of radio base station apparatuses coordinate and perform transmission, and a transmission section configured to transmit the plurality of pieces of channel state information to the radio base station apparatus. | 08-21-2014 |
20140247809 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to reduce interference against uplink signals of a user terminal connected to low transmission power base station, in a heterogeneous network. The radio communication method of the present invention includes, at the radio base station apparatus of the first cell having a predetermined cell radius, reporting, to a user terminal, information about radio resources in which an uplink signal of a user terminal connected to a macro base station and an uplink signal of a user terminal connected to a low transmission power base station of an LPN cell having a smaller radius than the cell radius of the macro cell, are made orthogonal to each other, and, at the user terminal, allocating the uplink signals to radio resources based on the radio resource information reported from the macro base station or the LPN, and transmitting the allocated uplink signals to the macro base station or the LPN. | 09-04-2014 |
20140301286 | RADIO BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to provide a radio base station apparatus, a mobile terminal apparatus, a radio communication system and a radio communication method which can cope with an increased number of users. A radio base station apparatus is provided with: a signal generating section that generates a first downlink control signal and a second downlink control signal for a mobile terminal apparatus; a first multiplexing section that multiplexes the first downlink control signal on a control region up to a predetermined number of symbols from the top of a subframe; a second multiplexing section that frequency-division-multiplexes the second downlink control signal on radio resources from the next symbol in the control region to the last symbol of the subframe; and a transmission section that transmits the first downlink control signal multiplexed on the control region and the second downlink control signal multiplexed on the radio resources. | 10-09-2014 |
20140307648 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed to reduce the influence of performance deterioration due to interference when CoMP transmission is adopted in a heterogeneous network. A user terminal measures the first reception quality in the first transmission period when a macro base station performs no transmission or reduces transmission power, and second reception quality in a second transmission period when the macro base station and low power nodes perform transmission, and transmits an uplink signal including the first reception quality and the second reception quality, to the macro base station, and the macro base station receives the uplink signal including the first reception quality and the second reception quality, and, when performing the coordinated multiple-point transmission, allocates radio resources for a user terminal that is located on an edge of a coordinated area in the first transmission period, based on the first reception quality and the second reception quality. | 10-16-2014 |
20140307838 | RECEIVER - The IRC receiver 10 according to the present invention includes a channel estimation unit 11 that performs a channel estimation process so as to estimate a channel matrix H, a transmission weight matrix generation unit 13 that generates a transmission weight matrix W | 10-16-2014 |