Patent application number | Description | Published |
20100001585 | ELECTRIC POWER SYSTEM - In order to provide an electric power system in which a plurality of electric power suppliers and demanders are configured by being mutually connected via electric power supply and demand control devices, the electric power system being not only self-sustainable without depending on a known electric power system, but also capable of coexisting with the known electric power system. | 01-07-2010 |
20100023174 | ELECTRIC POWER SYSTEM - In order to provide an electric power system in which a plurality of electric power suppliers and demanders is configured by being mutually connected by electric power supply and demand control devices, the electric power system being not only self-sustainable without depending on a known electric power system, but also capable of coexisting with the known electric power system; the electric power system is such configured that a plurality of electric power suppliers and demanders is mutually connected via an electric power supply and demand line (W), the electric power supplier and demander being provided with a power generation device | 01-28-2010 |
20110175443 | ALTERNATING CURRENT AUTONOMOUS DISTRIBUTED AC POWER SYSTEM - The objective of this invention is to provide an autonomous distributed electric power system without depending on a known electric power system. In order to achieve such objective, this invention proposes a following feature: Output frequencies of autonomous grid-connection inverters ( | 07-21-2011 |
20120249455 | INFORMATION DISPLAY DEVICE, INFORMATION DISPLAY METHOD, AND PROGRAM - A method is provided for displaying information. The method comprises displaying, on a touch screen, at least one representation of a geographic location. The method further comprises detecting contact between an operating member and a position on the touch screen; and displaying, based on the detected contact, information associated with the geographic location. The method still further comprises detecting removal of the operating member from the touch screen; and maintaining display of the geographic location information after detection of the removal. | 10-04-2012 |
20120268620 | INFORMATION PROVIDING APPARATUS, INFORMATION PROVIDING METHOD, AND PROGRAM - There is provided an information providing apparatus including a course information acquiring unit that acquires course information to which position information indicating positions of a predetermined plurality of spots and order information indicating an order of each spot are set, a photo acquiring unit that acquires photos taken in a predetermined area including the spots, a map making unit that makes a map where marks indicating the plurality of spots are displayed on the basis of the position information set to the course information, and a display control unit that sequentially sets the plurality of spots as display objects according to the order information set to the course information and causes a display unit to display the photos taken in the spots set as the display objects and a map of a predetermined range including the marks indicating the spots. | 10-25-2012 |
20130070661 | RADIO BASE STATION APPARATUS, RADIO RELAY STATION APPARATUS, AND RESOURCE ALLOCATION METHOD - To provide a radio base station apparatus, a radio relay station apparatus and a resource allocation method each which perform resource division of a backhaul sub-frame more optimally and can improve a throughput of a system, in the case of relay transmission. The radio base station apparatus according to the present invention includes: a frequency bandwidth control section configured to control a frequency bandwidth in a backhaul sub-frame, based on the number of the backhaul sub-frames, the number of mobile terminal devices, and frequency utilization efficiency of a radio link; and a transmitting section configured to transmit the backhaul sub-frame with the frequency bandwidth controlled by the frequency bandwidth control section. | 03-21-2013 |
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 |
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 |
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 |
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 |
20130114751 | USER EQUIPMENT AND CHANNEL STATE INFORMATION FEEDBACK METHOD - The present invention provides a user equipment and channel state information feedback method. The channel state information feedback method used in a coordinated multi-point system includes acquiring small-scale channel state information H′=[H′ | 05-09-2013 |
20130182013 | INFORMATION PROCESSING APPARATUS AND PROGRAM - An apparatus includes an input unit and a control unit. The input unit is configured to receive an input from a user. The control unit is configured to control a display to display an image and an image mark, move over the image to a position indicated by the input unit, and display an indicator showing an amount of time until the image mark is fixed to a current location of the image mark on the image. | 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 |
20130215988 | FEEDBACK METHOD, MOBILE TERMINAL APPARATUS AND RADIO BASE STATION APPARATUS - The present invention makes it possible to generate precoding weights reliably, even in downlink MIMO transmission using a plurality of transmitting antennas. The present invention includes: a first feedback information selection section ( | 08-22-2013 |
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 |
20130230007 | FEEDBACK METHOD AND MOBILE TERMINAL APPARATUS - The present invention makes it possible to feed back PMIs that are required to generate precoding weights, while securing improvement of throughput performance, in downlink MIMO transmission using a plurality of transmitting antennas. With the present invention, in a mode to include a PTI (Precoder Type Indicator) in a PUCCH and feedback the PTI to a radio base station apparatus for downlink MIMO transmission using a plurality of transmitting antennas, the transmission cycle of feedback information corresponding to report 2 and report 3 when the value of the PTI is 0 are made different from the transmission cycle of feedback information corresponding to report 2 and report 3 when PTI=1 and the former feedback information and the latter feedback information are multiplexed, and the multiplexed signal is transmitted to the radio base station apparatus by the PUCCH. | 09-05-2013 |
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 |
20130252625 | BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND SCHEDULING METHOD - To provide a base station apparatus, mobile terminal apparatus and scheduling method for enabling fairness of user throughput to be improved, a scheduling method is characterized by having the steps of notifying a mobile terminal apparatus of allocation information of radio resources to each cluster pattern with a plurality of cluster patterns comprised of clusters formed of a plurality of adjacent sectors predefined and with different radio resources allocated for each of the cluster patterns, receiving channel information•channel quality information corresponding to each of the cluster patterns for each of the radio resources from the mobile terminal apparatus, and controlling allocation of the radio resources to the mobile terminal apparatus, based on the channel information•channel quality information, where at least one of the cluster patterns is a coordinated cluster pattern to perform coordinated transmission between adjacent sectors in a cluster. | 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 |
20130273838 | RADIO RELAY STATION APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - In order to improve user throughout and increase the capacity in type II relay, a radio relay station apparatus according to the present invention has a channel quality information controlling section configured to measure channel quality of a mobile terminal apparatus, calculate a channel quality reduction value to reduce for the mobile terminal apparatus due to interference from other mobile terminal apparatuses, and select a predetermined mobile terminal apparatus from the other mobile terminal apparatuses; and a transmitting section configured to transmit information of the channel quality of the mobile terminal apparatus, information of the predetermined mobile terminal apparatus selected and the channel quality reduction value to a radio base station apparatus. | 10-17-2013 |
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 |
20130279364 | RADIO RELAY STATION APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - Provided are a radio relay station apparatus, a radio base station apparatus and a radio communication method capable of improving user throughput and increasing the capacity in type II relay. The radio communication method of the present invention is characterized by, in a radio relay station apparatus, measuring channel quality of relay links with use of sounding reference signals from mobile terminal apparatuses; and transmitting feedback information including measurement results of channel quality of the relay links to a radio base station apparatus via a backhaul link; in the radio base station apparatus, measuring channel quality of direct links with use of sounding reference signals from the mobile terminal apparatuses, subtracting a correction value from the measurement results of the radio relay station apparatus; and allocating radio resources to a mobile terminal apparatus based on measurement results of the channel quality of the direct links and subtraction results. | 10-24-2013 |
20130286930 | RELAY TRANSMISSION METHOD AND RELAY STATION - To prevent throughput of a macro terminal connecting to a radio base station from deteriorating due to an interference signal from a relay station provided in a cell of the radio base station in a radio communication system using relay transmission techniques, a relay transmission method of the invention has a step in which a relay station receives data to a relay terminal from a radio base station via a backhaul link, a step in which the relay station allocates a radio resource to the relay terminal to a certain frequency region over a plurality of TTIs, and a step in which the relay station transmits the data to the relay terminal via an access link using the allocated radio resource. | 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 |
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 |
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 |
20140003272 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD | 01-02-2014 |
20140016533 | COMMUNICATION PROCESSING METHOD AND BASE STATION - A base station receives channel state information corresponding to each of spare coordinated groups from each of user devices. A first group includes a plurality of coordinated groups arranged in advance. The spare coordinated groups corresponding to each user device are such as selected from the first group and include at least a service sector of best channel quality obtained measurement by the user device. The base station specifies a user device group corresponding to each of coordinated groups contained in each of coordinated group patterns. The user device group corresponding to the coordinated group is formed of user devices having the coordinated group in their spare coordinated groups. The base station uses channel state information reported from the user devices of the user device group corresponding to the coordinated group as a basis to perform user scheduling on the coordinated group. | 01-16-2014 |
20140029465 | MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS, RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION SYSTEM - The present invention is designed to provide a mobile terminal apparatus, a radio base station apparatus and a radio communication method which, even when a MIMO technique and a CoMP technique are applied together, can optimize the effects of both techniques. The mobile terminal apparatus estimates downlink channel states using reference signals included in downlink signals from a plurality of cells, determines the PMI for each cell and inter-cell phase difference information, from the channel states of the plurality of cells, such that the combinations of the PMI of each cell and inter-cell phase difference information become optimal, measures channel quality from the determined PMIs and inter-cell phase difference information, and transmits the PMI for each cell, the inter-cell phase difference information and channel quality information, to a radio base station apparatus. | 01-30-2014 |
20140050111 | RECEIVING APPARATUS, DATA RECEIVING METHOD, AND CHANNEL ESTIMATING APPARATUS AND METHOD THEREFOR - Disclosed are a receiving apparatus, a data receiving method, a channel estimating apparatus and a channel estimating method for multi-user interference (MUI) signals according to the present invention. The channel estimating apparatus for MUI signals has: a user type determining section configured to determine whether a UE apparatus corresponding to an own station belongs to a first type user or a second type user and to determine demodulation information to use in channel estimation of MUI signals based on the type of the UE apparatus corresponding to the own station; and a second channel estimating section configured to perform channel estimation of a multi-user interference signal based on the determined demodulation information to use in channel estimation of MUI signals. In the present invention, the UE apparatus is classified by type and the demodulation information to use in channel estimation of MUI signals is determined based on the type of the UE apparatus. With this structure, it is possible to improve channel estimation accuracy and further to improve the performance of data reception and user and cell throughputs. | 02-20-2014 |
20140057640 | METHOD FOR CONFIGURING COORDINATED MULTIPOINT TRANSMISSION - Provided is a method for configuring coordinated multipoint transmission (CoMP) of the present invention. The method includes: providing a transmission mode to support CoMP and, at a base station (eNB), configuring the transmission mode to support CoMP to a user terminal (UE) by radio resource control (RRC) signaling. According to the method of the present invention, it becomes possible to configure CoMP so that the LTE system can support the CoMP function. | 02-27-2014 |
20140064236 | CHANNEL RECONFIGURATION METHOD, PRECODING METHOD AND APPARATUS THEREFOR - In order to recognize a relatively accurate channel state of each UE, a channel of the UE is reconfigured based on channel phase information and channel quality information reported from the UE to obtain a channel matrix of the UE. Besides, a channel of the UE is reconfigured based on channel phase information and channel quality information reported from the UE to obtain a channel matrix of the UE, a precoding matrix of the UE is determined based on the channel matrix of the UE, and precoding is performed on data to transmit to the UE, using the precoding matrix. | 03-06-2014 |
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 |
20140133334 | METHOD FOR DETERMINING MULTI-USER CHANNEL QUALITY IN MOBILE COMMUNICATION SYSTEM, AND USER TERMINAL AND BASE STATION THEREFOR - Provided are a method for determining multi-user channel quality in a mobile communication system, a user terminal and a base station of the present invention. The method includes: in each user terminal, calculating the MU CQIs based on a first feedback template notified from a base station that has control over the user terminal or a second feedback template set by the user terminal and feeding the MU CQIs back to the base station. In the first feedback template or the second feedback template, a feedback ratio of MU CQIs for a plurality of hypothetical interference numbers k are defined, k being an integer larger than 0 and smaller than a maximum number of users schedulable by the base station. According to the present invention, it is possible to improve the accuracy in multi-user MIMO scheduling. | 05-15-2014 |
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 |
20140133419 | METHOD FOR COORDINATING INTER-CELL INTERFERENCE IN RADIO NETWORK, BASE STATION AND RADIO NETWORK - Provided are a method for coordinating inter-cell interference in a radio network, a transmission point and the radio network. The method includes: a step A of a normal base station performing scheduling based on feedback information of users of the normal base station and obtain a user scheduling result of the normal base station including a parameter about actual transmission characteristics of the normal base station; a step B of the normal base station obtaining a performance estimating parameter including a parameter about actual transmission characteristics of each of the one or plurality of low-power base stations for both cases of normal base station without transmission and normal base station with transmission; a step C of the normal base station using the performance estimating parameter and the user scheduling result of the normal base station as a basis to determine weighting throughputs of all transmission points for the case of normal base station without transmission and weighting throughputs of all the transmission points for the case of normal base station with transmission; and a step D of the normal base station comparing the weighting throughputs of all the transmission points, obtaining a transmission determination result and performing data transmission based on the transmission determination result. | 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 |
20140169275 | METHOD FOR COORDINATING INTER-CELL INTERFERENCE IN HETEROGENEOUS NETWORK AND HETEROGENEOUS NETWORK - Provided are a method for coordinating inter-cell interference in a heterogeneous network (HetNet) and the heterogeneous network. The method includes: forming M normal base stations and low-power nodes within coverage of the respective normal base stations in the heterogeneous network into a coordinated group; combining mute/non-mute states of bandwidths of the M normal base stations to obtain a plurality of states of the coordinated group; a user of each of the normal base stations feeding at least one first CQI back to the normal base station; a user of each of the low-power nodes feeding one or more second CQIs back to the low-power node; using the first CQI and the second CQIs as a basis to make capacity estimation of the coordinated group; and setting the mute/non-mute states of the bandwidths of the M normal base stations in accordance with a state of the coordinated group corresponding to an optimal system capacity so as to perform data transmission. In the method for coordinating interference provided by the present invention, M transmission points each including one or more normal base stations and low-power nodes covered by the respective normal base stations can be formed into a coordinated group, thereby extending processing for the normal base stations up to all the transmission points in the coordinated group. | 06-19-2014 |
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 |
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 |
20140248893 | MOBILE COMMUNICATION METHOD, RADIO BASE STATION, AND MOBILE STATION - The addition and change of a CoMP transmission point performing a CoMP transmission/reception process is appropriately performed. A mobile communication method includes: a step of notifying, by a radio base station (eNB), configuration information of CSI-RS of a CoMP transmission point to a mobile station (UE) connected to a cell (# | 09-04-2014 |
20140254539 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - The present invention is designed such that, in a heterogeneous environment where the same cell identification information is used, it is possible to identify from which cell a downlink signal has arrived, in a user terminal, and thereby maintain the accuracy of reception. The radio communication method according to the present invention includes the steps of: at the radio base station apparatus: generating a demodulation reference signal sequence using a pseudo-random sequence including a user-specific parameter; and transmitting user-specific information for determining the user-specific parameter and the demodulation reference signal sequence to the user terminal; and at the user terminal: determining the user-specific parameter using the user-specific information for determining the user-specific user parameter transmitted from the radio base station apparatus, and identifying a demodulation reference signal sequence using a pseudo-random sequence that uses the user-specific parameter; and demodulating a received signal using the identified demodulation reference signal sequence. | 09-11-2014 |
20140286289 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - To reduce overhead of CSI feedback without decreasing throughput in applying CoMP transmission, a radio communication method of the invention is characterized by including, in a user terminal measuring quality information for each of cells to perform Coordinated Multi-Point transmission, and notifying a radio base station apparatus of the quality information, in the radio base station apparatus calculating a quality difference between the cells to perform Coordinated Multi-Point transmission, by using the quality information for each the cells from the user terminal, determining granularity of inter-cell channel state information for each of the cells based on the quality difference, and notifying the user terminal of the granularity, and, in that the user terminal generating inter-cell channel state information for each of the cells according to the granularity from the radio base station apparatus, and transmitting the inter-cell channel state information for each of the cells to radio base station apparatuses of cells to perform Coordinated Multi-Point transmission. | 09-25-2014 |
20140286290 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - To reduce overhead of CSI feedback without decreasing throughput in applying CoMP transmission, a radio communication method of the invention is characterized in that a radio base station apparatus determines so that content of CSI to transmit to a serving cell to perform CoMP transmission as feedback is different from content of CSI to transmit to a coordinated cell as feedback, and notifies a user terminal of the content of CSI, and that the user terminal generates feedback information based on the content of CSI notified from the radio base station apparatus, and transmits the feedback information to radio base station apparatuses of cells that perform Coordinated Multi-Point transmission. | 09-25-2014 |
20140293947 | RADIO COMMUNICATION SYSTEM, USER TERMINAL AND RADIO COMMUNICATION METHOD - To ensure stable operation of a user terminal even in the case where the user terminal is instructed to transmit uplink signals at different transmission timings with a plurality of component carriers, in a radio communication system provided with a radio base station apparatus that indicates transmission timings of uplink signals for each component carrier, and a user terminal that transmits an uplink signal at a transmission timing set based on transmission timing information indicated from the radio base station apparatus and the like, it is a feature that the radio base station apparatus indicates different transmission timing information in a plurality of component carriers, and that the user terminal avoids simultaneous transmission of uplink signals in the case of performing communications using a plurality of contiguous component carriers. | 10-02-2014 |
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 |
20140301337 | MOBILE COMMUNICATION METHOD - It is appropriately determined whether it is necessary for a radio base station to start a CoMP transmission/reception process based on the result of a quality measurement process during a CoMP transmission/reception process in a heterogeneous network environment. A mobile communication method according to the present invention includes a step in which, during “X2 Setup Procedure” between a radio base station (eNB # | 10-09-2014 |
20140301340 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS, AND INTERFERENCE MEASUREMENT METHOD - The present invention is designed to measure interference with high accuracy, without changing the density of CSI-RSs, in a future system that does not reply on CRSs. A base station apparatus ( | 10-09-2014 |
20140307576 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE TERMINAL APPARATUS AND INTERFERENCE MEASUREMENT METHOD - To increase the number of CSI-RSs for interference measurement to improve interference measurement accuracy, a first reference signal for channel state measurement and a second reference signal for interference measurement are assigned to reference signal resources defined for transmission of the first reference signal, and a mobile terminal apparatus that supports both the first reference signal and the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal and the second reference signal. A second mobile terminal apparatus that supports the first reference signal and that does not support the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal, and of assignment information indicating that resources assigned the second reference signal are assigned a third reference signal of zero power for channel state measurement. | 10-16-2014 |
20140307630 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO COMMUNICATION METHOD - To enable a user terminal to determine a cell of a downlink signal also in a heterogeneous environment using the same cell identification information, and thereby enable reception accuracy to be maintained, a radio communication method of the invention is characterized in that a radio base station apparatus generates a reference signal sequence by using a pseudo random sequence including user specific information, and transmits the reference signal sequence to a user terminal, and that the user terminal performs signal processing using the reference signal sequence transmitted from the radio base station apparatus. | 10-16-2014 |
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 |
20140307688 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, RADIO BASE STATION APPARATUS AND USER TERMINAL - The present invention is designed to effectively apply carrier aggregation and CoMP transmission/reception in a system band that is formed with a plurality of fundamental frequency blocks. A radio communication system where carrier aggregation is applicable in the same frequency band, and, this radio communication system includes the first radio base station apparatus and a second radio base station apparatus that perform coordinated multiple point transmission to a user terminal using cells having the same frequency band, and the first radio base station apparatus and the second radio base station apparatus perform retransmission control for uplink signals from the user terminal on a shared basis, and perform mapping of downlink signals to radio resources separately. | 10-16-2014 |
20140314036 | RADIO BASE STATION APPARATUS, USER TERMINAL, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - In a configuration in which a downlink control channel is enhanced, the present invention is designed to adequately allocate downlink control signals to radio resources for the enhanced control channel. An allocation section that allocates a downlink control signal to both of a first control region from the first OFDM symbol to a predetermined OFDM symbol in a subframe, which is a transmission time interval, and a plurality of second control regions, each of which is frequency-division-multiplexed with a data region in a region after the predetermined OFDM symbol and is formed in a predetermined resource block size, or allocates the downlink control signal only to the second control regions, and a transmission section that transmits the downlink control signals to a user terminal are provided, and the allocation section forms the plurality of second control regions such that each second control region includes a plurality of enhanced control channel elements, each of which is an allocation unit of downlink control information, and also divides the enhanced control channel elements, and performs distributed mapping such that the divided enhanced control channel elements are distributed over the plurality of second control regions of varying frequency bands. | 10-23-2014 |
20140348096 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to provide a radio communication system, a radio base station apparatus and a radio communication method which can realize high transmission rate while reducing the calculation load involved in CoMP scheduling. The present invention provides a radio communication system including a plurality of radio base station apparatuses and a user terminal that is configured to be able to perform coordinated multiple point transmission/reception with the plurality of radio base station apparatuses, and, in this radio communication system: the radio base station apparatus has: an operation section ( | 11-27-2014 |
20140355470 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS AND RADIO COMMUNICATION CONTROL METHOD - The present invention is designed to maintain reduced interference in a layered network like a HetNet and improve the overall system throughput performance. A radio base station apparatus has a normal/ABS pattern determining section ( | 12-04-2014 |
20140362946 | RADIO BASE STATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to implement radio communication to maintain good communication quality even when the number of antennas provided in a radio base station apparatus is greater than the number of transmission layers of a downlink control channel, a broadcast channel, and cell-specific reference signals. When, from a radio base station apparatus ( | 12-11-2014 |
20140369224 | WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER TERMINAL, AND CHANNEL STATE INFORMATION MEASUREMENT METHOD - The present invention is designed to provide a wireless communication system, a base station apparatus, a user terminal, and a channel state information measurement method that can allow a user terminal to feed back channel quality information that is optimal for a transmission mode from a plurality of transmission points. A wireless communication system according to the present invention provides a base station apparatus having a determining section that determines resource information about resources to allocate the reference signal for measuring desired signals to, and resource for measuring interference signals, and a reporting section that reports the resource information to the user terminal, and the user terminal having a receiving section that receives the reported resource information, a measurement section that measures desired signals and interference signals based on the resource information, and a measurement section that measures the channel state using the measurement results of the measurement section. | 12-18-2014 |
20140369295 | MOBILE COMMUNICATION METHOD, RADIO BASE STATION AND MOBILE STATION - An objective of the present invention is to perform an appropriate demodulation process on a received signal in ABS. A mobile communication method according to the present invention includes the steps of: notifying a mobile station UE of an ABS “P_B” initial value by a radio base station eNB using an SIB2; notifying the mobile station UE of an ABS “P_A” initial value by the radio base station eNB using “RRCConnectionReconfiguration”; and performing a demodulation process on a downlink data signal in ABS by the mobile station UE on the basis of the ABS “P_B” initial value and the ABS “P_A” initial value. | 12-18-2014 |
20150016370 | RADIO BASE STATION APPARATUS, USER TERMINAL, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to allocate radio resources for an extended control channel adequately in a configuration in which a downlink control channel is extended. A radio base station apparatus according to the present invention has a mapping section configured to separate and map, per predetermined frequency domain unit constituting a system band, a common search space, which is a candidate region to arrange common control information that is common between user terminals in, and a UE-specific search space, which is a candidate region to arrange specific control information that is specific to each user terminal in, and a transmission section configured to frequency-division-multiplex with a downlink shared data channel and transmit an extended downlink control channel, in which the common control information is arranged in the common search space and in which the specific control information is arranged in the UE-specific search space, and the mapping section maps the common search space to a plurality of frequency domain units such that the common search space is distributed in the system band. | 01-15-2015 |
20150018034 | RADIO COMMUNICATION SYSTEM, USER TERMINAL, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to prevent the decrease of throughput and also reduce the overhead of CSI feedback when CoMP transmission is applied. In a radio communication system including a plurality of radio base station apparatuses and a user terminal that is configured to be able to carry out coordinated multiple-point transmission/reception with the plurality of radio base station apparatuses, the radio base station apparatus designates a plurality of candidate values of predetermined inter-cell channel state information and reports them to the user terminal, and the user terminal measures inter-cell channel state information of each cell, and also selects a specific candidate value that is close to the measurement value of inter-cell channel state information from the plurality of candidate values that have been reported, and feeds back the specific candidate value to the radio base station apparatus. | 01-15-2015 |
20150029888 | RADIO COMMUNICATION SYSTEM, USER TERMINAL, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to prevent the increase of the overhead of feedback information, and furthermore improve the accuracy of updated CQIs, upon updating CQIs that are given as feedback, when CoMP transmission is applied. The radio communication system of the present invention is formed with a plurality of radio base station apparatuses and a user terminal that is configured to be able to perform coordinated multiple-point transmission/reception with the plurality of radio base station apparatuses and, in this radio communication system, the user terminal calculates a channel quality indicator for coordinated multiple-point transmission using an interference component ratio between cells and feeds back the channel quality indicator, and the radio base station apparatus re-calculates a channel quality indicator in accordance with a transmission mode of coordinated multiple-point transmission, using the channel quality indicator fed back from the user terminal. | 01-29-2015 |
20150029982 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to report parameters related to techniques provided for in the LTE-A system to a user terminal with adequate timing. The radio communication method of the present invention provides a radio communication method in a radio communication system having a base station apparatus that is configured in compliance with LTE-Advanced system standards, and a user terminal that is configured to be able to perform radio communication with the base station apparatus, and, in this radio communication method, the base station apparatus generates downlink control channel information related to an enhanced physical downlink control channel, and notifies the downlink control channel information to the user terminal using an RRC Connection Reconfiguration signal, and the user terminal receives the RRC Connection Reconfiguration signal, and sets up the downlink control channel information. | 01-29-2015 |
20150043372 | RADIO COMMUNICATION METHOD, RADIO BASE STATION, USER TERMINAL, AND RADIO COMMUNICATION SYSTEM - The present invention is designed to enable adequate channel quality measurement in a user terminal even when CSI-RS transmission parameters are reported from a plurality of transmission points to the user terminal. In a radio communication method for a plurality of radio base stations and a user terminal having ability to receive a reference signal for channel state measurement from the plurality of radio base stations, the radio base station generates report information, which is formed with information that represents a transmission parameter of the reference signal, and system information that includes at least a system bandwidth of a radio base station that transmits the reference signal, and reports the generated report information to the user terminal by means of higher layer signaling, and the user terminal measures channel quality based on the received report information. | 02-12-2015 |
20150043474 | RADIO BASE STATION APPARATUS, USER TERMINAL, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - The present invention is designed to provide demodulation reference signals that are suitable for an extended downlink control channel. The radio base station apparatus of the present invention has a multiplication section that multiplies downlink control information allocated to an extended downlink control channel resource region in a resource block, by a user terminal-specific weight, and a reporting section that reports one group, among a plurality of groups that are configured by selecting varying antenna ports from a plurality of antenna ports corresponding to the number of transmission layers of a demodulation reference signal, to the user terminal, and in each group, the extended downlink control channel resource regions in the resource block and the antenna ports to constitute the group are associated with each other, and the multiplication section multiplies a demodulation reference signal corresponding to an antenna port in the one group that is associated with the extended downlink control channel resource regions where the downlink control information is allocated, by the weight. | 02-12-2015 |
20150043476 | RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, USER TERMINAL AND RADIO RESOURCE ALLOCATION METHOD - The present invention is designed to provide a radio communication system, a radio base station apparatus, a user terminal and a radio resource allocation method that cope with the increase of the number of users. A radio base station apparatus is provided with a scheduling section ( | 02-12-2015 |
20150043477 | RADIO COMMUNICATION SYSTEM, USER TERMINAL, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to suitably feed back each CoMP cell's channel state information when CoMP transmission is applied. In a radio communication system providing a plurality of radio base station apparatuses and a user terminal that is configured to be able to perform coordinated multiple-point transmission/reception with the plurality of radio base station apparatuses, the user terminal has an acquiring section that acquires channel state information of each of multiple cells, a generating section that generates feedback information such that at least part of the acquired channel state information of the multiple cells is combined and transmitted in the same subframe, and a transmission section that periodically feeds back the generated feedback information to a radio base station apparatus, which is one of multiple coordinated points, using a physical uplink control channel, and the radio base station apparatus has an updating section that updates the channel state information using the channel state information that is fed back from the user terminal. | 02-12-2015 |
20150078289 | RADIO COMMUNICATION SYSTEM, MOBILE TERMINAL APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to realize signaling of DM-RS sequence parameters for improving the flexibility of allocation of DM-RS resources in a system having complex cell structures. According to the radio communication method of the present invention, in a radio communication system supporting a system band formed with a plurality of component carriers by carrier aggregation, a radio base station apparatus allocates uplink DM-RS sequences per mobile terminal apparatus and per component carrier, and reports DM-RS sequence allocation information, and a mobile terminal apparatus generates DM-RS sequences using the allocation information reported from the radio base station apparatus. | 03-19-2015 |
20150085770 | RADIO COMMUNICATION SYSTEM, USER TERMINAL, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - The present invention is designed to, upon updating CQIs that are fed back, prevent the increase of the overhead of feedback information, and still improve the accuracy of the updated CQIs when CoMP transmission is applied. The radio communication system of the present invention is formed with a plurality of radio base station apparatuses and a user terminal that is configured to be able to perform coordinated multiple point transmission/reception with the plurality of radio base station apparatuses, and the user terminal acquires channel state information of multiple cells, generates feedback information such that the channel state information of multiple cells is allotted and transmitted in a plurality of subframes, and feeds back the generated feedback information to the radio base station apparatus of one of the multiple coordinated points, using a physical uplink shared data channel. | 03-26-2015 |