Patent application number | Description | Published |
20090010211 | BASE STATION APPARATUS AND RESOURCE ASSIGNING METHOD - A base station apparatus that selects an optimum MCS level so as to improve system throughput. In this base station apparatus, a terminal rank detecting part ( | 01-08-2009 |
20090022239 | RADIO TRANSMITTER, RADIO RECEIVER AND SYMBOL ARRANGING METHOD - A symbol arranging method by which a processing load due to channel estimation for MIMO channels can be reduced. In the methods a symbol is arranged for a transmission frame format having a pilot area and a data area. The pilot symbol is arranged in the pilot area. An ICE data symbol used for iterative channel estimation (ICE) is arranged in an ICE data area in the data area. The MIMO data symbol not used for ICE is arranged in the MIMO data area in the data area. | 01-22-2009 |
20090031183 | RETRANSMISSION CONTROL SCHEME AND WIRELESS COMMUNICATION APPARATUS - A retransmission control scheme and a wireless communication apparatus wherein the efficiency of retransmission control is enhanced to further improve the system throughput. In this wireless communication apparatus ( | 01-29-2009 |
20090034637 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND LINK ADAPTATION METHOD - A link adaptation method and others wherein feedback information amount can be reduced. According to this method, a receiving apparatus ( | 02-05-2009 |
20090036153 | BASE STATION AND COMMUNICATION SYSTEM - Provided are a communication system and a base station capable of preventing interference between signals and improving the throughput. A base station device ( | 02-05-2009 |
20090052392 | RETRANSMISSION CONTROL METHOD, BASE STATION AND MOBILE STATION - A base station, a mobile station and a retransmission control method for enabling communication to be more efficiently performed. In a communication system comprising a base station ( | 02-26-2009 |
20090055701 | MIMO TRANSMITTING APPARATUS, MIMO RECEIVING APPARATUS, AND RETRANSMITTING METHOD - A MIMO transmitting apparatus that achieves a flexible control in accordance with variation of a propagation environment to reduce the number of retransmissions. A buffer ( | 02-26-2009 |
20090060082 | WIRELESS COMMUNICATION APPARATUS, AND FEEDBACK INFORMATION GENERATING METHOD - A wireless communication apparatus that allows channel information to be reproduced with high precision at a transmitting end without increasing feedback information amount. In this apparatus, a channel estimating part ( | 03-05-2009 |
20090067329 | LINE QUALITY REPORT METHOD, BASE STATION DEVICE, AND COMMUNICATION TERMINAL - There is provided a base station device for suppressing increase of current consumption at a communication terminal by a line quality information report used for resource allocation of a downstream line and increase of interference of the upstream line traffic. The base station device reports whether a terminal performing communication which may be delayed, to each communication terminal (ST | 03-12-2009 |
20090093265 | RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS AND RADIO TRANSMITTING METHOD - A radio transmitting apparatus, a radio receiving apparatus and a radio transmitting method wherein the accuracy of detecting streams in D-TxAA is improved. There is included a transmission mode switching part ( | 04-09-2009 |
20090116571 | TRANSMITTER, RECEIVER, AND COMMUNICATION METHOD - A transmitter, a receiver and a communication method enabling improvement of the data rate of an MIMO system. One signal x | 05-07-2009 |
20090124210 | RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - A radio transmitting apparatus, a radio receiving apparatus, a wireless communication method and a wireless communication system wherein even when a channel correlation is large, the channel capacity and the feedback amount can be improved. In ST | 05-14-2009 |
20090185634 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION DEVICE, AND CHANNEL CORRELATION MATRIX DECISION METHOD - It is possible to prevent lowering of a throughput of a radio communication system even when propagation path environments of an uplink line and downlink line are asymmetric. A maximum proper value calculation unit ( | 07-23-2009 |
20090238290 | TRANSMITTING DEVICE, RECEIVING DEVICE, TRANSMITTING METHOD, RECEIVING METHOD AND WIRELESS COMMUNICATION SYSTEM - Provided is a transmitting device which improves a data rate while maintaining channel estimation accuracy, or improves channel estimation accuracy while maintaining a data rate, in a MIMO-OFDM system. In the transmitting device, a transmitting antenna information adding section ( | 09-24-2009 |
20090262851 | RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD - A radio transmitting apparatus and a radio transmitting method wherein the loss of transmission efficiency is suppressed to improve the reception quality of pilots received by a receiver apparatus. In the present apparatus and method, in a case of transmitting a pilot block at one of two transmission antennas, the areas of data blocks placed immediately before and after the pilot block are reduced, and the CP of the pilot block is expanded by the amount of that reduction. On the other hand, it is arranged that the interval of transmitting the expanded CP and pilot block be an interval of halting the transmission at the other transmission antenna. | 10-22-2009 |
20090268621 | TRANSMITTING APPARATUS, RECEIVING APPARATUS AND MULTIPLEX NUMBER CONTROLLING METHOD - A spatial multiplex number controlling method and others wherein streams can be separated for each of receivers and the transmission efficiency can be improved. In a receiving apparatus, a PER is calculated from a history of CRC test results per stream multiplex number. A reception quality and an offset corresponding to the calculated PER are fed hack to a transmitting apparatus. The transmitting apparatus assigns, based on the fed-back reception quality and offset, the streams, thereby controlling the stream multiplex number. | 10-29-2009 |
20090291702 | RADIO COMMUNICATION TERMINAL AND RADIO COMMUNICATION BASE STATION DEVICE - Provided are a radio communication terminal and a radio communication base station device which are installed in a Multi-User MIMO system even if the ability to suppress interference is low. According to beam combination information fed back from NON-MIMO UE, and beam information and a CQI fed back from another MIMO UE, a scheduler section ( | 11-26-2009 |
20090298509 | RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - Disclosed are a radio transmission device and a radio transmission method capable of reducing a reception error of a user at other cell and improving transmission efficiency at the other cell when frequency scheduling is combined with beam forming. In the device and the method, a beam allocation table storage unit ( | 12-03-2009 |
20090305690 | RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - Disclosed is a radio transmission device capable of improving a transmission stream error resistance and preventing lowering of a throughput of a communication system. In this device, according to the feedback information from the radio reception device, a repetition control unit ( | 12-10-2009 |
20090318157 | RECEPTION DEVICE, TRANSMISSION DEVICE, AND COMMUNICATION METHOD - It is possible to provide a transmission device, a reception device, and a communication method which can improve a throughput in a MIMO system performing a precoding process. Each of beams formed by the transmission device are one-to-one correlated to an arrangement position of the uplink control channel so that the arrangement position of the uplink control channel is different in a block for each of beams. The reception device which has selected different beams arranges the uplink control channel at the arrangement position in the block corresponding to the selected beam and transmits the uplink control channel to the transmission device. | 12-24-2009 |
20100020893 | RADIO COMMUNICATION APPARATUS AND RESENDING CONTROLLING METHOD - A synthesized gain in a resending operation can be improved significantly by relatively simple control when resending control is applied upon executing of a transmission diversity using CDD. A radio communication apparatus equipped with a plurality of antennas and for performing communication by MIMO, includes a phase shift amount assigning section | 01-28-2010 |
20100075703 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RETRANSMISSION CONTROL METHOD - In a multiuser MIMO system, entire system throughput achieved during retransmission is significantly enhanced. When an interference signal addressed to another user equipment (UE | 03-25-2010 |
20100077275 | METHOD AND SYSTEM FOR DATA TRANSMISSION IN A MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEM - A method for data transmission in a multiple input multiple output (MIMO) system, the method including, receiving multiple input data streams; performing low density parity check (LDPC) encoding of the input data streams utilising a parity check matrix, the parity check matrix including a plurality of sub-parity check matrices for encoding respective ones of the input data streams; and performing space time encoding for transmitting the LDPC encoded input data streams over a plurality of antennas. | 03-25-2010 |
20100100789 | METHOD AND SYSTEM FOR DATA TRANSMISSION IN A MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEM - A method for data transmission in a multiple input multiple output (MIMO) system. The method for data transmission includes receiving multiple input data streams and performing low density parity check (LDPC) encoding of the input data streams utilising a parity check matrix. The parity check matrix comprises a plurality of sub-parity check matrices for encoding respective associated ones of the input data streams and performing space time encoding for transmitting the LDPC encoded input data streams over a plurality of antennas. The performing of the LDPC encoding of the input data streams includes generating one or more connection matrices, each connection matrix for injecting information of one of the input data streams into the encoding of another one of the input data streams. Each connection matrix is a zero matrix if a lowest parity check protection level based on the sub-parity check matrix for the one of the input data streams is equal to or lower than an assigned parity check protection level for the one input data stream, and a non zero matrix otherwise. | 04-22-2010 |
20100103044 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD - Reliability of beam selection by pre-coding is improved. A user terminal | 04-29-2010 |
20100118919 | WIRELESS COMMUNICATION APPARATUS AND RESPONSE SIGNAL SPREADING METHOD - A wireless communication apparatus capable of minimizing the degradation in separation characteristic of a code multiplexed response signal. In this apparatus, a control part ( | 05-13-2010 |
20100142630 | MULTICARRIER TRANSMITTING APPARATUS, MULTICARRIER RECEIVING APPARATUS, AND THEIR METHODS - A multicarrier transmitting apparatus capable of improving the data symbol error rate characteristic to improve the reception quality. In this apparatus, a replacement position deciding part ( | 06-10-2010 |
20100183047 | WIRELESS COMMUNICATION APPARATUS AND RESPONSE SIGNAL SPREADING METHOD - A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part ( | 07-22-2010 |
20100183056 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - Overhead of signaling for retransmission control using a multiple codeword is decreased and throughput is improved. A radio communication apparatus performs data transmission by using the multiple codeword, and includes a reception device having a MIMO demodulation section | 07-22-2010 |
20100189189 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD - The signaling amount in selecting a plurality of beams is reduced in pre-coding to thereby enhance the throughput. To select a plurality of beams when the pre-coding is applied, when notification of a beam number is provided in a feedback signal from a user equipment | 07-29-2010 |
20100190486 | RADIO COMMUNICATION MOBILE STATION DEVICE AND CDD MODE JUDGING METHOD - Provided is a radio communication mobile station device which can accurately judge a CDD mode of an interference signal from other cell when using a CDD. In this device, a mode judging unit ( | 07-29-2010 |
20100195749 | Radio Communication Device and Symbol Arrangement Method - Provided is a radio communication device which can reduce the affect of CDD channel fluctuation of an interference signal from other cell when using a CDD. In this device, an arrangement unit ( | 08-05-2010 |
20100202386 | WIRELESS COMMUNICATION APPARATUS AND MAPPING METHOD - A wireless communication apparatus wherein the power consumption can be reduced. In this apparatus, a code block dividing part ( | 08-12-2010 |
20100208664 | WIRELESS COMMUNICATION BASE STATION APPARATUS, WIRELESS COMMUNICATION MOBILE STATION APPARATUS AND PILOT SIGNAL SEQUENCE ALLOCATING METHOD IN MULTICARRIER COMMUNICATION - A wireless communication apparatus wherein even if the number of sectors or cells is increased in a multicarrier communication, the orthogonality between the pilot signal sequences between adjacent sectors or cells can be prevented from collapsing due to a frequency selectivity fading, thereby improving the reception characteristic. In this apparatus, modulating parts ( | 08-19-2010 |
20100211844 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - Lowering of the frequency use efficiency and throughput is prevented while the blanking advantage is provided at the retransmission time in MCW using a plurality of streams per codeword. In a wireless communication apparatus for using a plurality of streams per codeword and performing data transmission according to a plurality of codewords, when two codewords are transmitted using four streams, for example, from a base station | 08-19-2010 |
20100229065 | RADIO RECEPTION DEVICE, RADIO TRANSMISSION DEVICE, AND RADIO COMMUNICATION METHOD - It is possible to provide a radio transmission device, a radio reception device, and a radio communication method which can suppress increase of the feedback overhead and improve the throughput characteristic. In ST | 09-09-2010 |
20100251057 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - Information on other code words can be utilized at the time of retransmitting, and transmission characteristics of the case of using multiple code words are improved. In a radio communication apparatus for transmitting data using multiple code words, as response time taken by a transmitting station to receive a response signal (Ack/Nack signal) after the data is transmitted from the transmitting station (BS) to a receiving station (UE), a cycle of second response time (RTT | 09-30-2010 |
20100266060 | RADIO COMMUNICATION DEVICE AND METHOD FOR DETERMINING DELAY AMOUNT OF CDD - A radio communication device capable of obtaining the frequency diversity effect when a CDD is used for the open-loop transmission. A CDD control information determination section ( | 10-21-2010 |
20100273438 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD IN MULTI-CARRIER COMMUNICATION - Provided is a radio communication device capable of preventing lowering of the frequency diversity effect when using the CDD (Cyclic Delay Diversity) in combination with the frequency diversity technique in a multi-carrier communication. In the radio communication device ( | 10-28-2010 |
20100296384 | WIRELESS COMMUNICATION APPARATUS AND RESPONSE SIGNAL SPREADING METHOD - A wireless communication apparatus capable of minimizing the degradation in separation characteristic of a code multiplexed response signal. In this apparatus, a control part ( | 11-25-2010 |
20100309997 | RADIO COMMUNICATION TERMINAL DEVICE, RADIO COMMUNICATION BASE STATION DEVICE, AND CQI FEEDBACK METHOD - It is possible to provide a radio communication terminal device, a radio communication base station device, and a CQI feedback method which can improve the CQI reproducibility while reducing the feedback overhead. A terminal channel judgment unit judges whether a local terminal is a TU terminal or a LOS terminal. A feedback CQI decision unit selects a Best-M report if the local terminal is the TU terminal, and selects a DCT report if the local terminal is the LOS terminal. The feedback CQI decision unit feeds back the CQI by using the selected report method. | 12-09-2010 |
20110002415 | WIRELESS COMMUNICATION MOBILE STATION DEVICE AND METHOD FOR USING PRECODING MATRIX - Provided is a wireless communication mobile station device capable of suppressing an increase in an SRS resource even when the mobile station is provided with a plurality of antennas. In the device, a weighting section ( | 01-06-2011 |
20110007834 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing the overhead of retransmission control signaling. In a case where a retransmission control method is employed in consideration of adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>2/3, two bits are set. In a case where the encoding rate 1/301-13-2011 | |
20110064120 | BASE STATION APPARATUS AND RESPONSE SIGNAL RECEIVING METHOD - A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part ( | 03-17-2011 |
20110080975 | MIMO TRANSMITTING APPARATUS, MIMO RECEIVING APPARATUS, MIMO TRANSMISSION SIGNAL FORMATION METHOD, AND MIMO TRANSMISSION SIGNAL SEPARATION METHOD - Provided are a MIMO transmitting apparatus, a MIMO receiving apparatus, a MIMO transmission signal formation method, and a MIMO transmission signal separation method that improve a transmission efficiency. In a MIMO communication apparatus ( | 04-07-2011 |
20110096690 | RECEIVER APPARATUS AND COMMUNICATION METHOD - A receiver apparatus wherein the processing amount for CQI (Channel Quality Indicator) measurements in a communication system having a plurality of system bandwidths can be reduced. In this apparatus, a narrow band CQI measurement part ( | 04-28-2011 |
20110096691 | RECEIVER APPARATUS AND COMMUNICATION METHOD - A receiver apparatus wherein the processing amount for CQI (Channel Quality Indicator) measurements in a communication system having a plurality of system bandwidths can be reduced. In this apparatus, a narrow band CQI measurement part ( | 04-28-2011 |
20110129027 | WIRELESS COMMUNICATION BASE STATION DEVICE, WIRELESS COMMUNICATION TERMINAL DEVICE, AND METHOD FOR SETTING CYCLIC DELAY - Provided is a base station enabling an increase of the resource utilization efficiency of a precoded dedicated pilot signal. In a base station ( | 06-02-2011 |
20110134872 | BASE STATION AND TERMINAL - Disclosed are a base station and a terminal which implement wideband uplink data communication as well as implementing a placement method for control channels (CCHs) in a frame, which can be used by terminals having various terminal capabilities. In a base station ( | 06-09-2011 |
20110134901 | RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - It is possible to obtain the diversity effect in a plurality of slots while preventing complication of a scheduler or inefficient use of resources, to eliminate the phenomenon in which SINR significantly decreases in a specific slot, and to avoid deterioration of demodulation performance. In a radio communication system which performs transmission in a sub-frame unit having two slots temporally continuously arranged, when pre-coding is performed by multiplying a signal to be output to a plurality of antennas by a pre-coding weight, CDD is used to shift a phase such that the phase in the pre-coding weight is cyclically changed on the frequency axis. The phase shift amount to be applied by the CDD is set to change by 2π in an allocated resource block (1RB) of the local device, and PVS is applied such that the phase shift amount differs by π between the weight W | 06-09-2011 |
20110149945 | MIMO TRANSMISSION DEVICE AND MIMO TRANSMISSION METHOD - Provided are a MIMO transmission device and a MIMO transmission method which can improve reception quality of a response signal. A terminal ( | 06-23-2011 |
20110167312 | RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD - Provided are a radio transmission device and a radio transmission method which can reduce the transmission packet collision generation ratio even when no resource allocation signal is detected in retransmission. When control information outputted from a decoding unit ( | 07-07-2011 |
20110176474 | WIRELESS RELAY STATION APPARATUS - A wireless relay station apparatus for enabling a mobile station and a base station to reliably receive network coding data and to provide sufficient reception performance is provided. (1) A repeater divides data X received from a mobile station into important data and non-important data and divides data Y received from eNB into important data and non-important data. Next, (2) the repeater places the data so that important data Sx for the mobile station and important data Sy for the eNB do not overlap, XORs (exclusive ORs) them, and generates network coding data X (X) Y. (3) The repeater applies downlink propagation inverse characteristic H | 07-21-2011 |
20110194525 | WIRELESS COMMUNICATION BASE STATION EQUIPMENT, WIRELESS COMMUNICATION TERMINAL DEVICE AND SEARCH SPACE SETTING METHOD - Disclosed is wireless communication base station equipment in which CCE allocation can be flexibly performed without collision of ACK/NACK signals between a plurality of unit bands, even when wideband transmission is performed exclusively on a downlink circuit. In this equipment, an allocation unit ( | 08-11-2011 |
20110200000 | WIRELESS COMMUNICATION TERMINAL APPARATUS, WIRELESS COMMUNICATION BASE STATION APPARATUS, AND MODULATION METHOD - A wireless communication terminal apparatus wherein even in a case of performing a wideband transmission using only a downstream line, CCE assignment can be flexibly performed without any collisions of ACK and NACK signals among a plurality of unit bands. In a wireless communication terminal apparatus ( | 08-18-2011 |
20110206030 | RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - The present invention makes it possible to obtain the transmission diversity effect by applying a CDD while reducing the inter-code interference when performing a code multiplexing. When an Ack/Nack signal is transmitted from a user terminal to a base station in an upstream control channel by using an Ack/Nack resource, the signal is code-multiplexed by using a code sequence containing an orthogonal sequence and a cyclic-shifted sequence and transmitted from a plurality of user terminals to the base station. Upon using an aggregation size indicating the number of control signals of the downstream control channel, if the aggregation size is greater than one, it is determined that no resource located at the right of the axis of the cyclic-shifted amount of the cyclic-shifted sequence in the same orthogonal code of the orthogonal sequence is used, and the Ack/Nack signal to which CDD is applied from a plurality of antennas is transmitted by using a resource ACK # | 08-25-2011 |
20110211482 | RECEIVER APPARATUS AND COMMUNICATION METHOD - A receiver apparatus wherein the processing amount for CQI (Channel Quality Indicator) measurements in a communication system having a plurality of system bandwidths can be reduced. In this apparatus, a narrow band CQI measurement part ( | 09-01-2011 |
20110216845 | RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit ( | 09-08-2011 |
20110222483 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - In the data transmission such as MCW, or the like using multiple streams, errors can be suppressed in feedback information while reducing an amount of information required for feedback every stream. A radio communication apparatus for performing data transmission by multiple code words in multiple streams and blanking transmission at retransmission, includes a Nack detector which detects Nack as a response signal that responds to a received result of code words from a communication partner station; a CQI bit number allocation deciding section which changes an allocation of CQI bit numbers between the multiple streams when Nack is detected; a feedback CQI information generator which generates CQI information of each stream; and a feedback information transmitter which transmits feedback information containing Ack/Nack information, ranking information of each stream, and generated CQI information. | 09-15-2011 |
20110222500 | WIRELESS COMMUNICATION TERMINAL APPARATUS, WIRELESS COMMUNICATION BASE STATION APPARATUS, AND CLUSTER CONSTELLATION SETTING METHOD - A wireless communication terminal apparatus wherein even when a SC-FDMA signal is divided into a plurality of clusters and the plurality of clusters are then mapped to respective discontinuous frequency bands (when C-SC-FDMA is used), the improvement effect of system throughput can be maintained, while the user throughput can be improved. In the apparatus, a DFT unit ( | 09-15-2011 |
20110228759 | ENCODING RATIO SETTING METHOD AND RADIO COMMUNICATION DEVICE - Disclosed are an encoding ratio setting method and a radio communication device which can avoid encoding of control information at an encoding ratio lower than necessary and suppress lowering of the transmission efficiency of the control information. In the device, an encoding ratio setting unit ( | 09-22-2011 |
20110249707 | RADIO COMMUNICATION APPARATUS AND REFERENCE SIGNAL GENERATING METHOD - A wireless communication apparatus capable of minimizing the degradation in separation characteristic of a code multiplexed response signal. In this apparatus, a control part ( | 10-13-2011 |
20110255504 | TRANSMITTING APPARATUS AND METHOD - A communication device which can reduce amount of control information, limit interference with other traffics, and prevent an increase in current consumption. In this device, a separation unit ( | 10-20-2011 |
20110261894 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - In a MIMO system using a cross-polarized antenna structure, even if no ideal XPD can be obtained, the interference between different polarized waves can be reduced to allow an effective precoding to be executed. When a MIMO communication is performed between a transmitter ( | 10-27-2011 |
20110299407 | BASE STATION APPARATUS, TERMINAL DEVICE, AND RANK SETTING METHOD - A base station apparatus, in a wireless communication system supporting band aggregation, able to limit drops in throughput while lowering the amount of control information for the rank of an added band; and a terminal device and rank setting method of the same. An added band rank setting unit ( | 12-08-2011 |
20110300890 | RADIO RECEPTION APPARATUS, RADIO TRANSMISSION APPARATUS, AND RADIO COMMUNICATION METHOD - In a case where a second reference signal for a second communication system is transmitted in addition to a first reference signal for a first communication system, resources that affect a reception apparatus compatible only with the first communication system can be minimized, and the throughput can be prevented from being deteriorated. As resources for a reference signal CSI-RS, DVRB resources in which a resource unit defined in a frequency-time domain is divided in a time direction and distributedly allocated at predetermined frequency intervals are used and CSI-RS is allocated in a resource ID of a part of DVRB resources and transmitted when a reference signal 4RS for LTE is transmitted to a reception apparatus in addition to transmitting CSI-RS for LTE-A. The reception apparatus receives CSI-RS allocated in DVRM resources on the basis of DVRB setting information for CSI-RS, measures channel quality such as CQI, PMI or RI by using CSI-RS, and transmits and reports feedback information containing channel quality information to a transmission apparatus. | 12-08-2011 |
20110317581 | RADIO RECEPTION APPARATUS, RADIO TRANSMISSION APPARATUS, AND RADIO COMMUNICATION METHOD - In a case where a second reference signal for a second communication system is transmitted in addition to a first reference signal for a first communication system, resources that affect a reception apparatus compatible only with the first communication system can be minimized, and the throughput can be prevented from being deteriorated. As resources for a reference signal CSI-RS for LTE-A, last half symbols in a time direction of a resource unit RB/Sub-frame defined in a frequency-time domain are used, and the CSI-RS is allocated in a position up to the last two symbols or in the last symbol, or the like, of a particular RB/Sub-frame and transmitted when a reference signal | 12-29-2011 |
20120026948 | WIRELESS COMMUNICATION BASE STATION DEVICE AND DIVISION NUMBER DETERMINATION METHOD - Disclosed are a wireless communication base station device and a division number determination method that improves the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit ( | 02-02-2012 |
20120026953 | COMMUNICATION DEVICE AND COMMUNICATION METHOD - Disclosed are a wireless communication base station device, a wireless communication terminal device, and a wireless communication method with which the amount of signaling is reduced while maintaining a high scheduling gain. A judgment unit ( | 02-02-2012 |
20120039160 | INTEGRATED CIRCUIT FOR RESPONSE SIGNAL SPREADING - A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part ( | 02-16-2012 |
20120039234 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - A data alignment method capable of preventing degradation in demodulation performance due to variation in signal qualities when a data signal to which a Turbo code is applied is transmitted simultaneously from a plurality of cells. The method divides signal components to be used for data alignment into resources common to all the cells and resources dependent on the cells and transmits encoded and rate-matched data with the first half thereof aligned to the resources common to all the cells and the second half thereof aligned to the resources dependent on the cells. | 02-16-2012 |
20120039258 | RADIO COMMUNICATION APPARATUS AND RESPONSE SIGNAL SPREADING METHOD - A wireless communication apparatus capable of minimizing the degradation in separation characteristic of a code multiplexed response signal. In this apparatus, a control part ( | 02-16-2012 |
20120040701 | APPARATUS AND METHOD FOR REDUCING INTERFERENCES BETWEEN BASE STATIONS IN WIRELESS COMMUNICATION SYSTEM - A method for reducing interferences between base stations in a communication system having a plurality of base stations. This method comprises the steps of: causing a user station to receive both a signal transmitted by a local-cell base station and a signal transmitted by an adjacent-cell base station, thereby measuring the SNR of the interfered link and the SNR of the leak link of the adjacent-cell base station; calculating a weighting factor of a leak power based on the measured SNR of the interfered link and the measured SNR of the leak link of the adjacent-cell base station; and determining, based on the calculated weighting factor, whether or not the leak power has to be suppressed and to what degree such suppression has to be performed. | 02-16-2012 |
20120063292 | BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - A wireless communication apparatus capable of minimizing the degradation in separation characteristic of a code multiplexed response signal. In this apparatus, a control part ( | 03-15-2012 |
20120063343 | WIRELESS COMMUNICATION TERMINAL AND COMMUNICATION METHOD - To measure the channel quality of the own cell accurately in a condition where there is no interference from a neighbor cell. A wireless communication terminal according to the invention is a wireless communication terminal to be connected to a base station for transmitting and receiving data to/from the base station, the wireless communication terminal including: a receiver that receives a signal which includes control information provided for measuring a channel quality of own cell from the base station; an extractor that extracts the control information from the signal received by the receiver; a measurement section that measures, on the basis of the control information, the channel quality of the own cell in a domain where a neighbor cell does not transmit a signal; and a transmitter that transmits a measurement result of the channel quality of the own cell measured by the measurement section, to the base station. | 03-15-2012 |
20120076040 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - To suppress concentration of channel quality information requests and reports in a case of discontinuously transmitting reference signals at specific resources in a time domain, and thereby preventing degradation in throughput. A transmission apparatus (eNB) transmits an instruction of CSI request distributed for each reception apparatus in a subframe concurrently with or earlier than a reference signal CSI-RS to each of reception apparatuses (UE | 03-29-2012 |
20120076043 | WIRELESS COMMUNICATION BASE STATION DEVICE, WIRELESS COMMUNICATION TERMINAL DEVICE, CONTROL CHANNEL TRANSMISSION METHOD, AND CONTROL CHANNEL RECEPTION METHOD - Disclosed is a wireless communication base station device which can prevent unnecessary HARQ retransmissions when a terminal is using a plurality of unit bands, even when the unit band through which data is transmitted differs from the unit band through which a PDCCH, to which the resource allocation information of said data is allocated, is transmitted. In this device, a control unit ( | 03-29-2012 |
20120093124 | METHOD AND DEVICE FOR SETTING DEMODULATION REFERENCE SIGNALS IN WIRELESS COMMUNICATION SYSTEM - The present invention provides a method of arranging demodulation reference signals in a radio communication system that communicates according to a coordinated scheme. Demodulation reference signals and data are transmitted to a receiving terminal through time/frequency resources of the radio communication system using a resource block as a base unit. The method includes arranging at least two orthogonal DM-RSs in two edge OFDM symbols for resource blocks of respective cells, a frequency offset existing between cells at positions of the orthogonal DM-RSs in the edge OFDM symbols, performing puncturing at positions corresponding to the orthogonal DM-RSs of the other cells in the edge OFDM symbols of the respective cells, arranging superimposing DM-RSs in the two edge OFDM symbols in a resource block of one cell and arranging the superimposing DM-RSs at positions corresponding to the resource blocks of the other cells, wherein positions of the superimposing DM-RSs are set between the positions of the orthogonal DM-RSs in the respective edge OFDM symbols. | 04-19-2012 |
20120113842 | WIRELESS COMMUNICATION SYSTEM AND DOWNLINK RECEIVING POWER DETECTION METHOD THEREFOR - A wireless communication system and a method for detecting downlink receiving power in the system are disclosed. N cells in the system respectively transmit data to at least one receiving terminal via N resource blocks using the same time-frequency resources; multiple channel state information reference signals (CSI-RSs) of a corresponding cell are set in each resource block, and orthogonality is maintained among the CSI-RSs of all the cells, wherein N is an integer greater than 1. Said method includes: an additional demodulation reference signal (DM-RS) used for indicating a receiving power is set in a puncture position in the resource block of the first cell which corresponds to a CSI-RS set in a resource block of another cell; and the receiving power of said first cell is detected according to said additional DM-RS. By using said method, the receiving power of a single cell in N cells can be detected, and the system overhead is not increased. | 05-10-2012 |
20120115521 | METHOD AND SYSTEM FOR SETTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and a system of setting up a reference signal in a radio communication system. The radio communication system includes a serving cell and a neighboring cell, and a mobile terminal of the serving cell uses the same temporal frequency resource so as to receive a serving resource block from the serving cell and receive an interference resource block from the neighboring cell. The method according to the present disclosure includes a step of setting up a user-specific reference signal in the interference resource block and a step in which puncturing is performed at same temporal frequency position as the temporal frequency position at which the user-specific reference signal is set up on the interference resource block of the serving resource block so as to prevent any signal from being transmitted at the punctured temporal frequency position. When the method and the system provided in the present disclosure are used and the interference power between cells is thereby measured, it is possible to effectively reduce feedback overhead in a coordinated beamforming. | 05-10-2012 |
20120115539 | METHOD AND DEVICE FOR ADJUSTING TIMING ADVANCE IN UPLINK MULTIPLE POINTS RECEPTION - A method and device for adjusting a timing advance in a communication system composed of a mobile terminal and multiple base stations is provided. The method includes steps: the multiple base stations measures channel latencies and powers of channel responses between the mobile terminal and the multiple base stations separately; the non-serving base station in the multiple base stations reports the channel latency and the power measured to a serving base station; and the serving base station determines the timing advance of the uplink of the mobile terminal according to the channel latency and the power received and the channel latency and the power which are measured by the serving base station itself, and informs the mobile base station of the timing advance. By using the method and the device, the useful power received by the uplink multi-base stations can be optimized, and the interference power can be effectively reduced. | 05-10-2012 |
20120120884 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - Interference between users in an MU-MIMO system is minimized by effective precoding, without increasing an overhead of control data. In a wireless communication system in which multiplex communication is possible between multiple UE | 05-17-2012 |
20120127952 | METHOD AND DEVICE FOR SUPERIMPOSING REFERENCE SIGNAL AND DATA BASED ON SPACE DIVISION MULTIPLE ACCESS - The present invention provides a method of superimposing data signals and reference signals in a space division multiple access communication system, a base station of the communication system transmitting the first layer resource block and another layer resource block to a terminal using the same time/frequency resources, reference signals in the first layer resource block and reference signals in the other layer resource block being orthogonal to each other, the method including superimposing data signals transmitted in the first layer resource block at positions of reference signals in the first layer resource block, making a spreading sequence of the superimposed data signals orthogonal to a spreading sequence of the reference signals in the first layer resource block. The present invention can effectively use resources consumed under a multiuser MIMO system and drastically improve the system performance. | 05-24-2012 |
20120134333 | TERMINAL DEVICE AND RETRANSMISSION CONTROL METHOD - Provided are a terminal device and a retransmission control method by which, when carrier aggregation communication using a plurality of downlink unit bands is applied, the quality of downlink data transmitted by each downlink unit band can be maintained, while suppressing the increase in overhead of downlink allocation control information. In a terminal ( | 05-31-2012 |
20120164958 | TRANSMITTING APPARATUS AND METHOD - A communication device which can reduce amount of control information, limit interference with other traffics, and prevent an increase in current consumption. In this device, a separation unit separates radio resource allocation information, specific section information and transmission parameter information from a received signal. A specific section information control unit selects a sub-carrier designated by the specific section information to allocate data to be transmitted to the own unit. A channel quality measuring unit uses a pilot signal to measure the channel quality of the selected sub-carrier. A channel quality information creating unit creates channel quality information indicating the measurement results input from the channel quality measuring unit. A multiplexing unit multiplexes the transmission signal with the channel quality information. | 06-28-2012 |
20120177090 | RADIO COMMUNICATION TERMINAL DEVICE AND RADIO COMMUNICATION METHOD - Provided are a radio communication terminal apparatus and a radio transmission method by which intersymbol interference of DM-RS of a CoMP terminal and a Non-CoMP terminal can be reduced. A CoMP set setting unit ( | 07-12-2012 |
20120250730 | INTEGRATED CIRCUIT FOR RESPONSE SIGNAL SPREADING - A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part ( | 10-04-2012 |
20120266054 | TERMINAL APPARATUS AND RESPONSE SIGNAL TRANSMITTING METHOD - A terminal apparatus and a response signal transmitting method wherein the system transmission efficiency can be improved by devising a bundling rule. In a terminal ( | 10-18-2012 |
20120281732 | INTEGRATED CIRCUIT FOR RESPONSE SIGNAL SPREADING - A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part ( | 11-08-2012 |
20120287770 | WIRELESS COMMUNICATION TERMINAL APPARATUS, WIRELESS COMMUNICATION BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD - Provided are a wireless communication terminal apparatus, a radio communication base station apparatus and a wireless communication method whereby the increase in the number of signaling bits can be suppressed, while the SRS capacity can be improved. RS type determining unit ( | 11-15-2012 |
20120288025 | TERMINAL AND COMMUNICATION METHOD THEREOF - A terminal and a communication method thereof whereby, even in a case of employing the asymmetric carrier aggregation system and further employing the MIMO transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal ( | 11-15-2012 |
20120294256 | TERMINAL, BASE STATION, RESPONSE METHOD, AND RETRANSMISSION CONTROL METHOD - Disclosed are a terminal, a base station, a response method, and a retransmission control method, which are capable of switching the response signal transmission method while preventing throughput degradation and without increasing the number of signaling bits. A bundling determination unit ( | 11-22-2012 |
20120300740 | WIRELESS COMMUNICATION TERMINAL DEVICE, WIRELESS COMMUNICATION BASE STATION DEVICE, AND WIRELESS COMMUNICATION METHOD - Disclosed are a wireless communication method, a wireless communication base station device, and a wireless communication terminal device that dynamically switch the transmission slot of an SRS of each terminal within a cell while suppressing an increase in the number of signaling bits. A terminal ( | 11-29-2012 |
20120320854 | CONTROL INFORMATION TRANSMISSION APPARATUS, CONTROL INFORMATION RECEPTION APPARATUS, AND CONTROL INFORMATION TRANSMISSION METHOD - A control information transmission apparatus which can reduce the interference power of the control signal of the terminal connected to the femtocell is provided. The control information transmission apparatus comprises an arrangement unit that arranges some or all of control signals for a terminal in an extension part among resources including a compatible part and the extension part; and a transmission unit that transmits some or all of the arranged control signals for the terminal. | 12-20-2012 |
20130010750 | WIRELESS RECEPTION DEVICE, WIRELESS TRANSMISSION DEVICE, AND WIRELESS COMMUNICATION METHOD - A wireless reception device includes a resource information acquisition section that is configured to acquire silent resource setting information showing that a silent resource which indicates that no signals are allocated in a predetermined resource among distributed resources in which a resource unit defined in a frequency-time domain is divided along a time direction and distributed at a predetermined frequency interval, a receiver that is configured to receive a signal including the distributed resources in which the silent resource is allocated; and an inter-cell interference measurement section that is configured to measure an inter-cell interference pertaining to an amount of interference affected by another cell based on the silent resource setting information and by use of the silent resource allocated in the distributed resources. | 01-10-2013 |
20130010895 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, TERMINAL AND METHOD OF GENERATING CODEBOOK - The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which cotains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal. | 01-10-2013 |
20130028217 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - Provided are a wireless communication apparatus and a wireless communication method capable of reducing distortion of a CSI-RS and interference with other CSI-RSs. The wireless communication apparatus according to the invention includes: a CSI-RS generation section that generates CSI-RSs, an arrangement section that arranges the CSI-RSs in a single or a plurality of consecutive OFDM symbols located between a plurality of OFDM symbols, in which a signal other than the CSI-RS is arranged, and adjacent to the plurality of OFDM symbols in which the signal other than the CSI-RS is arranged; and a transmission section that transmits a signal other than the CSI-RS arranged by the arrangement section and a transmission signal including the CSI-RS. | 01-31-2013 |
20130034077 | BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD - A wireless communication apparatus capable of minimizing the degradation in separation characteristic of a code multiplexed response signal. In this apparatus, a control part ( | 02-07-2013 |
20130039162 | CODE DIVISION MULIPLEXING METHOD, TRANSMITTING DEVICE AND RECEIVING DEVICE USING THE METHOD - There are provided a code division multiplexing method as well as a transmitting device and a receiving device using the method. The method performs code division multiplexing of a plurality of signals by using a code matrix, the code matrix comprising a plurality of code words, the number of which is the same as the number of the plurality of signals, with each code word comprising a plurality of chips, the method comprising: multiplying each signal of the plurality of signals by each chip of a corresponding code word respectively; and calculating a sum of products of the respective chips in each code word and the corresponding signals to form a plurality of multiplexed signals, wherein, corresponding chips of the respective code words constitute multiple sets of chips, and only one term in differences or sums of any one set of chips and one set of chips among other sets of chips is not zero. The code division multiplexing method as well as the transmitting device and the receiving device according to the present disclosure can make the influence of the selectivity of channels when de-multiplexing is performed small, thus improving the channel transmission quality. | 02-14-2013 |
20130044580 | ORTHOGONAL CODES BASED CODE DIVISION MULTIPLEXING METHOD, MULTIPLEXING DEVICE, AND DE-MULTIPLEXING DEVICE - The present disclosure provides an orthogonal codes based code division multiplexing method of performing the code division multiplexing of demodulation reference signals in multiple layers of resource blocks by using orthogonal matrices, the method comprising: changing the order of chips in particular rows of a first orthogonal matrix to obtain a second orthogonal matrix with the changed order of chips; and multiplying the chips in respective rows of the second orthogonal matrix by the demodulation reference signals in corresponding layers of resource blocks correspondingly in the time direction to obtain code division multiplexing signals. The technical scheme of the present disclosure can improve the power jitter situation of downlink signals on the time, thereby the usage efficiency of the power amplifier at the base station side can be improved. | 02-21-2013 |
20130064227 | WIRELESS COMMUNICATION DEVICE, AND WIRELESS COMMUNICATION METHOD - Disclosed are a wireless communication method and device which can maintain frequency scheduling flexibility and improve system throughput performance. A Walsh sequence number determination unit ( | 03-14-2013 |
20130064317 | METHOD AND DEVICE FOR FEEDING BACK PRE-CODING MATRIX INDEX OF DUAL-POLARIZED ANTENNA - There is provided a method and device for feeding back a pre-coding matrix index of a dual-polarized antenna which has a first antenna array and a second antenna array and is arranged at a base station to which the index of a first pre-coding matrix for the first antenna array, the index of a second pre-coding matrix for the second antenna array and the phase offset between the first pre-coding matrix and the second pre-coding matrix are fed back from a terminal, comprising: computing a distance between the first pre-coding matrix and the second pre-coding matrix; judging whether the distance is larger than a predetermined threshold or not; and assigning less bits to indicate the phase offset if the distance is larger than the predetermined threshold. The method and device according to the present disclosure can effectively advance the feedback accuracy of a system thus improving the bit error rate and throughput of the system. | 03-14-2013 |
20130070820 | TRANSMITTING APPARATUS AND METHOD - A communication device which can reduce amount of control information, limit interference with other traffics, and prevent an increase in current consumption. In this device, a separation unit separates radio resource allocation information, specific section information and transmission parameter information from a received signal. A specific section information control unit selects a sub-carrier designated by the specific section information to allocate data to be transmitted to the own unit. A channel quality measuring unit uses a pilot signal to measure the channel quality of the selected sub-carrier. A channel quality information creating unit creates channel quality information indicating the measurement results input from the channel quality measuring unit. A multiplexing unit multiplexes the transmission signal with the channel quality information. | 03-21-2013 |
20130077466 | RADIO COMMUNICATION DEVICE AND SIGNAL DIVISION METHOD - Provided is a radio communication device which can reduce ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit ( | 03-28-2013 |
20130077560 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - To improve the channel estimation accuracy of “DL grant” that instructs data allocation of a downlink of R-PDCCH. A wireless communication apparatus according to an aspect of the invention includes a receiver that is configured to receive a control signal, and a blind decoder that is configured to perform a blind decoding of a plurality of adjacent physical, resource blocks (PRBs) in which the same preceding is used in a unit of an RB group (RBG) that is composed of the plurality of PRBs, and to detect a resource area to which a control signal for the wireless communication apparatus that is included in the control signal is allocated. | 03-28-2013 |
20130094349 | TERMINAL APPARATUS, BASE STATION APPARATUS, RETRANSMISSION METHOD AND RESOURCE ALLOCATION METHOD - This invention provides a terminal apparatus that can suppress the quality degradation caused by a propagation path variation when implementing a retransmission control method using non-adaptive HARQ in a wireless communication system utilizing the MIMO communication technique. In this apparatus, a number-of-retransmissions counting unit ( | 04-18-2013 |
20130114564 | TRANSMITTER APPARATUS, RECEIVER APPARATUS, TRANSMISSION METHOD, AND NOTIFICATION METHOD - This invention relates to a transmitter apparatus, a receiver apparatus, a transmission method and a notification method that, when a switching between MIMO communication and non-MIMO communication is performed, can suppress the increase of an SRS (Sounding Reference Signal) resource, while suppressing the degradation of trackability of temporal variation of a channel. In a terminal ( | 05-09-2013 |
20130121386 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD - The signaling amount in selecting a plurality of beams is reduced in pre-coding to enhance throughput. When notification of a beam number is provided in a feedback signal from a user equipment to a radio base station, a superior beam number, having a high quality rank with small time variation, is bound up and fixed for a predetermined time period and notification of only a inferior beam number is provided within the predetermined time period. For example, to select three beams among six beams, first, notification of the superior two beam numbers (beam numbers ‘b’ and ‘c’) is provided. These beam numbers are fixed for a predetermined time period and then notification of only the inferior one beam number (beam number ‘e’) is provided within the predetermined time period. Thus, the signaling amount for providing beam number notification is reduced. | 05-16-2013 |
20130128856 | BASE STATION, MOBILE STATION, METHOD FOR TRANSMITTING CALCULATION PARAMETERS FOR POWER HEADROOM, AND METHOD FOR TRANSMITTING POWER HEADROOM - Provided are a base station, a mobile station, a method for transmitting calculation parameters for a power headroom and a method for transmitting a power headroom capable of increasing the accuracy of link adaptation by reducing the probability that a power headroom value is out of a reported range. In a base station ( | 05-23-2013 |
20130142160 | TERMINAL DEVICE, BASE STATION DEVICE, RETRANSMISSION METHOD, AND RESOURCE ALLOCATION METHOD - The present invention provides a terminal device that allows constraints on user allocation to be prevented and spread codes to be allocated in a scheduler when non-adaptive HARQ is employed using a PHICH. A codeword generator ( | 06-06-2013 |
20130163507 | RELAY STATION, BASE STATION AND COMMUNICATION METHOD - Provided is a relay station that is capable of improving PDSCH channel estimation accuracy, even in a case where a DL grant is provided that gives instructions for downlink data allocation for R-PDCCH. In this device, a signal separation unit ( | 06-27-2013 |
20130176948 | WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION TERMINAL AND BASE STATION - A wireless communication method, a terminal and a base station are provided. The method includes the step of transmitting a plurality of best companion pre-coding matrix indexs (BCIs) and corresponding delta channel quality indicators (ΔCQIs) from the terminal to the base station, wherein the period of frames for transmitting the plurality of BCIs is larger than the period of frames for transmitting a single BCI. The method, terminal and base station according to the present disclosure can greatly increase scheduling flexibility at base station side and improve MU-MIMO performance without increasing feedback overhead of channels. | 07-11-2013 |
20130223549 | METHOD, MOBILE TERMINAL, BASE STATION, AND SYSTEM FOR REPORTING BEST COMPANION PRECODING MATRIX INDEX IN COMMUNICATION SYSTEM WITH DOUBLE CODEBOOK - A method, mobile terminal, and system for reporting BCI are provided, the method comprises the steps of: obtaining a PMI W | 08-29-2013 |
20130258894 | TRANSMITTER, RECEIVER, TRANSMISSION METHOD, AND RECEPTION METHOD - Provided is a transmitter which improves the flexibility of SRS resource allocation without increasing the amount of signaling for notifying the cyclic shift amount. In the transmitter, with regard to each basic shift amount candidate group having a basic shift amount from 0 to N−1, a transmission control unit ( | 10-03-2013 |
20130272257 | WIRELESS COMNMUNICATION TERMINAL AND POWER CONTROL METHOD - Provided is a wireless communication terminal which, when SRSs are simultaneously transmitted between CCs and between antenna ports, avoids increasing the effect of bit rounding errors of D/A converters when the number of antenna ports set for SRS transmission differs between CCs. This device comprises a transmission power calculation unit ( | 10-17-2013 |
20130287149 | MIMO RECEPTION DEVICE AND MIMO RECEPTION METHOD - Provided are a MIMO transmission device and a MIMO transmission method which can improve reception quality of a response signal. A terminal ( | 10-31-2013 |
20130294251 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing overhead of retransmission control signaling. Where a retransmission control method is employed with adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>⅔, two bits are set. In a case where the encoding rate ⅓11-07-2013 | |
20130301585 | INTEGRATED CIRCUIT FOR SPREADING RESPONSE SIGNAL - A radio communication apparatus receives control information on one or more control channel elements (CCEs) with consecutive CCE number(s). The radio communication apparatus first-spreads a response signal with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of the one or more CCEs, and second-spreads the first-spread response signal with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index. One of cyclic shift values used for an orthogonal sequence is determined from an index of the | 11-14-2013 |
20130308488 | METHOD OF FEEDING BACK MU-CQI IN A COMMUNICATION SYSTEM, TRANSMISSION POINT DEVICE, AND USER EQUIPMENT - There are provided a method, user equipment, and transmission point device for feeding back channel quality indicator (MU-CQI) to the transmission point in a communication system including the transmission point and a plurality of user equipments, the method comprising steps: the transmission point sending a message to an intended user equipment of the plurality of user equipments; and the intended user equipment calculating the MU-CQI based on the message, and feeding back the MU-CQI to the transmission point. The present disclosure enables dynamic MU operation, and improves link adaptation performance with marginal downlink overhead. And the accuracy is not limited by codebook size. | 11-21-2013 |
20130329684 | TRANSMISSION DEVICE, RECEIVING DEVICE, TRANSMISSION METHOD, AND RECEIVING METHOD - In a base station ( | 12-12-2013 |
20130336265 | MOBILE STATION AND RECEPTION METHOD - Provided is a radio communication device which can separate propagation paths of antenna ports and improve a channel estimation accuracy even when using virtual antennas. The device includes: a mapping unit which maps a data signal after modulation to a virtual antenna and a virtual antenna; a phase inversion unit which inverts the phase of S0 transmitted from an antenna port in synchronization with a phase inversion unit between the odd-number slot and the even-number slot; the phase inversion unit which inverts the phase of R0 transmitted from the antenna port; a phase inversion unit which inverts the phase of S1 transmitted from an antenna port in synchronization with a phase inversion unit; and the phase inversion unit which inverts the phase of R1 transmitted from an antenna port. | 12-19-2013 |
20140029556 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - To suppress concentration of channel quality information requests and reports in a case of discontinuously transmitting reference signals at specific resources in a time domain, and thereby preventing degradation in throughput. A transmission apparatus transmits an instruction of CSI request distributed for each reception apparatus in a subframe concurrently with or earlier than a reference signal CSI-RS to each of reception apparatuses. Each of the reception apparatuses detects the CSI request from the transmission apparatus and calculates CSI from a channel estimation value of CSI-RS received thereafter. Then, the reception apparatus identifies CSI report subframe of the own apparatus from CSI report interval information of a given time interval notified in advance, the subframe in which the CSI request is detected and transmission timing of CSI-RS, and transmits a feedback signal including CSI report value by using PUSCH at the timing of the CSI report subframe. | 01-30-2014 |
20140036854 | WIRELESS COMMUNICATION METHOD OF CONFIGURING MEASUREMENT RESOURCE, AND WIRELESS COMMUNICATION DEVICE THEREFOR - There are provided a wireless communication method of configuring a measurement resource and a wireless communication device therefor. The method comprises determining a measurement resource to be disregarded when the number of measurement resources configured in one subframe exceeds the maximum number of measurement resources that a user equipment is able to measure in one subframe, wherein the measurement resource with lower priority is determined to be disregarded, and the measurement resource is not disregarded A times within the duration of N subframes, where A is an integer larger than 1, N corresponds to one plus B*periodicity of the measurement resource, and B is an integer equal to or larger than 1. | 02-06-2014 |
20140050182 | TERMINAL APPARATUS, BASE STATION APPARATUS, TRANSMISSION METHOD AND RECEPTION METHOD - Provided is a terminal apparatus in which, a transmission control unit ( | 02-20-2014 |
20140064234 | METHOD FOR DETERMINING CHANNEL QUALITY INDICATOR, BASE STATION AND USER EQUIPMENT THEREFOR - A method for determining Channel Quality Indicators to be reported by User Equipments in base station cooperation, and a base station and a User Equipment therefore are provided. The method comprising: assigning a sequence of adjustment factors to various possible base station cooperations; transmitting the assigned adjustment factors to UEs; calculating an original CQI for each possible base station cooperation in each UE; adjusting the original CQIs based on the received adjustment factors in UEs; and reporting one or multiple original CQI(s) that are the highest after the aforesaid adjustment and knowledge of which CQI(s) are reported to the base station by each UE. | 03-06-2014 |
20140064241 | COMMUNICATION APPARATUS AND A COMMUNICATION METHOD - Provided is a radio communication device which can reduce ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit ( | 03-06-2014 |
20140071936 | METHOD OF SCRAMBLING SIGNALS, TRANSMISSION POINT DEVICE AND USER EQUIPMENT USING THE METHOD - Method of scrambling signals, transmission point device and user equipment using the method are provided. The method is for scrambling signals assigned on predetermined radio resources of at least one layer of resource blocks with the same time and frequency resources, and comprises the steps of: sending an ID table to a user equipment through higher layer signaling, the ID table being a subset of the whole ID space and containing available IDs for the user equipment; notifying the user equipment an ID in the ID table to be used through physical layer signaling or UE specific higher layer signaling; generating a random seed based on the notified ID; initializing a scrambling sequence by the random seed; and scrambling the signals with the initialized scrambling sequence. The method of the disclosure, by combining physical layer signaling and higher layer signaling, may notify the used group ID and the blind detection space to a UE, the blind detection for the UE is enabled and the signaling overhead is reduced. | 03-13-2014 |
20140082431 | TERMINAL DEVICE AND RESPONSE SIGNAL SENDING METHOD - Provided is a terminal ( | 03-20-2014 |
20140098764 | BASE STATION AND METHOD FOR RECEIVING CONTROL INFORMATION - Disclosed are an encoding ratio setting method and a radio communication device which can avoid encoding of control information at an encoding ratio lower than necessary and suppress lowering of the transmission efficiency of the control information. In the device, an encoding ratio setting unit ( | 04-10-2014 |
20140098903 | radio communication for reducing the signaling amount in selecting a plurality of beams in pre-coding for enhancing throughput - The signaling amount in selecting a plurality of beams is reduced in pre-coding to enhance throughput. When notification of a beam number is provided in a feedback signal from an user equipment to a radio base station, a superior beam number, having a high quality rank with small time variation, is bound up and fixed for a predetermined time period and notification of only a inferior beam number is provided within the predetermined time period. For example, to select three beams among six beams, first, notification of the superior two beam numbers (beam numbers ‘b’ and ‘c’) is provided. These beam numbers are fixed for a predetermined time period and then notification of only the inferior one beam number (beam number ‘e’) is provided within the predetermined time period. Thus, the signaling amount for providing beam number notification is reduced. | 04-10-2014 |
20140105110 | TERMINAL DEVICE, BASE STATION DEVICE, TRANSMISSION METHOD AND TRANSMIT POWER SETTING METHOD - The objective of the present invention is to provide a terminal device capable of suppressing delay in switching between transmit/receive points, and of reliably switching between the transmit/receive points. In the device, a reception processing unit ( | 04-17-2014 |
20140112313 | BASE STATION APPARATUS AND RESOURCE ALLOCATION METHOD - A wireless communication terminal apparatus wherein even when a SC-FDMA signal is divided into a plurality of clusters and the plurality of clusters are then mapped to respective discontinuous frequency bands (when C-SC-FDMA is used), the improvement effect of system throughput can be maintained, while the user throughput can be improved. In the apparatus, a DFT unit ( | 04-24-2014 |
20140119362 | METHOD OF REPORTING PHASE OFFSETS, USER EQUIPMENT AND TRANSMISSION POINT DEVICE USING THE METHOD - A transmission point device, user equipment, and method of reporting phase offsets between signals received from a serving cell and neighbor cells in a communication system are disclosed. The method comprises steps of: quantizing the phase offsets using a predetermined number of bits; utilizing another bit to indicate constellation of the phase offsets; reporting the quantized phase offsets and the constellation to transmission point. The present disclosure may improve the signal combining gain from multiple transmission points with minimum overhead increasing. | 05-01-2014 |
20140126383 | METHOD OF CSI REPORTING, USER EQUIPMENT AND ENODE B - Provided is reporting one or more long term CSI components to an eNode B, wherein at least one long term CSI component being reported with multiple values; and reporting a transmission scheme assumption indicator (TSAI) together with a set of short term CSI components to the eNode B, wherein the TSAI indicating the eNode B of a value of the multiple values of the at least one long term CSI component to be currently used and of the set of short term CSI components being conditioned on the value indicated by the TSAI, wherein the short term CSI components being reported more frequently. | 05-08-2014 |
20140126479 | TERMINAL APPARATUS AND METHOD FOR TRANSMITTING A REFERENCE SIGNAL - Provided are a radio communication terminal apparatus and a radio transmission method by which intersymbol interference of DM-RS of a CoMP terminal and a Non-CoMP terminal can be reduced. A CoMP set setting unit ( | 05-08-2014 |
20140161093 | TERMINAL, BASE STATION, TRANSMISSION METHOD AND RECEPTION METHOD - The present invention is a terminal capable of suppressing increase in transmit power required for transmitting a CSI report at a terminal while widely securing candidates for motion control. A reception processing unit ( | 06-12-2014 |
20140169260 | TRANSMISSION DEVICE, PREAMBLE TRANSMISSION DEVICE AND TRANSMISSION METHOD - In order to provide a transmission device and transmission method with which a response signal for random access preamble transmitted from a preamble transmission device is efficiently transmitted, setting unit ( | 06-19-2014 |
20140177601 | TERMINAL, TRANSMITTING DEVICE, RECEPTION QUALITY REPORTING METHOD AND RECEPTION METHOD - A terminal which is capable of selecting appropriate transmission points while reducing the overhead for channel state information (CSI) reporting is provided. A measuring unit ( | 06-26-2014 |
20140185590 | RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD - When an Ack/Nack signal is transmitted from a user terminal to a base station in an upstream control channel by using an Ack/Nack resource, the signal is code-multiplexed by using a code sequence containing an orthogonal sequence and a cyclic-shifted sequence and transmitted from a plurality of user terminals to the base station. If an aggregation size indicating the number of control signals of the downstream control channel is greater than one, it is determined that no resource located at the right of the axis of the cyclic-shifted amount of the cyclic-shifted sequence in the same orthogonal code of the orthogonal sequence is used, and the Ack/Nack signal to which CDD is applied from a plurality of antennas is transmitted by using a resource ACK #0 allocated to the own device and an unused resource ACK #1, which have the same orthogonal code, but have different cyclic-shifted amounts. | 07-03-2014 |
20140211715 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A wireless communication base station device, terminal device, and method have reduced signaling while maintaining high scheduling gain. A judgment unit pre-stores a correspondence between the number of code words and the number of clusters to reduce the maximum value for the number of clusters allocated to each terminal as the number of code words increases, and thus determines the maximum value for the number of clusters based on the number of code words acquired. Based on the number of code words for a transmission signal from a terminal, an estimated value for the reception quality, and the maximum value for the number of clusters that is output by the judgment unit, a scheduling unit schedules the allocation of the transmission signal transmitted by each terminal to a transmission band frequency (frequency resource) so as not to exceed the maximum value for the number of clusters. | 07-31-2014 |
20140211878 | MIMO RECEPTION DEVICE AND MIMO RECEPTION METHOD - Provided are a MIMO transmission device and a MIMO transmission method which can improve reception quality of a response signal. A terminal ( | 07-31-2014 |
20140219381 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD - In a MIMO system using a cross-polarized antenna structure, even if no ideal XPD can be obtained, the interference between different polarized waves can be reduced to allow an effective precoding to be executed. When a MIMO communication is performed between a transmitter and a receiver each using a cross-polarized antenna structure, a channel estimating and precoding selection section of the receiver performs a channel estimation of MIMO channels from the transmitter to the receiver, decides a precoding matrix of a projection matrix for mutually orthogonalizing or substantially orthogonalizing the channel response matrixes for respective different polarized waves, and feeds the determined precoding matrix back to the transmitter. In the transmitter, a precoding processing section applies the precoding matrix to the spatial stream corresponding to one of the polarized waves to perform a precoding, thereby allowing the transmitter to transmit the polarized waves with the orthogonality therebetween maintained. | 08-07-2014 |
20140286186 | TRANSMITTING APPARATUS AND METHOD - A communication device which can reduce amount of control information, limit interference with other traffics, and prevent an increase in current consumption. In this device, a separation unit separates radio resource allocation information, specific section information and transmission parameter information from a received signal. A specific section information control unit selects a sub-carrier designated by the specific section information to allocate data to be transmitted to the own unit. A channel quality measuring unit uses a pilot signal to measure the channel quality of the selected sub-carrier. A channel quality information creating unit creates channel quality information indicating the measurement results input from the channel quality measuring unit. A multiplexing unit multiplexes the transmission signal with the channel quality information. | 09-25-2014 |
20140286291 | PRECODING MATRIX SET QUALITY MEASUREMENT AND REPORTING - The invention relates to methods for determining the interference variability of a precoding matrix set, and the use of same for purposes of scheduling and precoding matrix set selection. The precoding matrix set used by an interferer base station is evaluated by the mobile terminal which experiences the intercell interference from the interferer base station. The mobile terminal is informed about the precoding matrices of the precoding matrix set used by the base station. The mobile terminal measures the radio channel to the interferer cell, and then estimates based on the measured radio channel and with the knowledge on the particular precoding matrices of the precoding matrix set, the interference variability of the precoding matrix set. The interference variability may be reported to the serving base station of the mobile terminal, and thus considered for scheduling decisions by the serving base station referring the mobile terminal. | 09-25-2014 |
20140293900 | TRANSMITTING DEVICE AND TRANSMITTING METHOD - For use of a second mapping pattern in which a part of a resource on which a DMRS (Demodulation Reference Signal) is to be mapped is replaced with a data resource in a first mapping pattern of the DMRS, control section ( | 10-02-2014 |
20140293935 | WIRELESS COMMUNICATION BASE STATION EQUIPMENT, WIRELESS COMMUNICATION TERMINAL DEVICE AND SEARCH SPACE SETTING METHOD - Disclosed is wireless communication base station equipment in which CCE allocation can be flexibly performed without collision of ACK/NACK signals between a plurality of unit bands, even when wideband transmission is performed exclusively on a downlink circuit. In this equipment, an allocation unit ( | 10-02-2014 |
20140307536 | TERMINAL AND COMMUNICATION METHOD THEREOF - A terminal and a communication method thereof whereby, even in a case of employing the asymmetric carrier aggregation system and further employing the MIMO transmission method for upstream channels, the error characteristic of control information can be prevented from being degraded. In the terminal, a transport signal forming unit forms transport signals by arranging, based on an arrangement rule, ACK/NACK and CQI in a plurality of layers. According to the arrangement rule, an error detection result is arranged, on a priority basis, in a layer that is different from a layer in which the channel quality information is arranged. In this way, the puncturing of CQI using ACK/NACK can be minimized, with the result that the error characteristic of control information can be prevented from being degraded. | 10-16-2014 |
20140307823 | BASE STATION APPARATUS AND TRANSMISSION METHOD - The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal. | 10-16-2014 |
20140334328 | METHOD AND BASE STATION FOR MAPPING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and a system of setting up a reference signal in a radio communication system are disclosed. The radio communication system includes a serving cell and a neighboring cell, and a mobile terminal of the serving cell uses the same temporal frequency resource to receive a serving resource block from the serving cell and an interference resource block from the neighboring cell. The method includes setting up a user-specific reference signal in the interference resource block and puncturing at the same temporal frequency position as the temporal frequency position at which the user-specific reference signal is set up on the interference resource block of the serving resource block to prevent any signal from being transmitted at the punctured temporal frequency position. When the method and the system are used and the interference power between cells is measured, it is possible to effectively reduce feedback overhead in a coordinated beamforming. | 11-13-2014 |
20140347971 | COMMUNICATION METHOD AND COMMUNICATION APPARATUS - The present disclosure provides an orthogonal codes based code division multiplexing method of performing the code division multiplexing of demodulation reference signals in multiple layers of resource blocks by using orthogonal matrices, the method comprising: changing the order of chips in particular rows of a first orthogonal matrix to obtain a second orthogonal matrix with the changed order of chips; and multiplying the chips in respective rows of the second orthogonal matrix by the demodulation reference signals in corresponding layers of resource blocks correspondingly in the time direction to obtain code division multiplexing signals. The technical scheme of the present disclosure can improve the power jitter situation of downlink signals on the time, thereby the usage efficiency of the power amplifier at the base station side can be improved. | 11-27-2014 |
20140348119 | TERMINAL AND METHOD FOR TRANSMITTING A TRANSMISSION SIGNAL - Disclosed are a wireless communication base station device and a division number determination method that improve the frequency diversity effect while maintaining channel estimation accuracy regardless of the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. A determination unit determines the number of divisions in the frequency domain of a transmission signal from a wireless communication terminal device. Here, the determination unit increases the number of divisions in the frequency domain of the transmission signal from the wireless communication terminal device as the number of pilot blocks included in the transmission signal increases. In addition, a scheduling unit schedules allocation to the frequency resources of the divided transmission signal according to the number of divisions determined by the determination unit. | 11-27-2014 |
20140355408 | METHOD OF SCRAMBLING REFERENCE SIGNALS, DEVICE AND USER EQUIPMENT USING THE METHOD - A Method of scrambling reference signals, device and user equipment using the method are provided. In the method, a plurality of layers of reference signals assigned on predetermined radio resource of a plurality of layers of resource blocks with the same time and frequency resources are scrambled, the method comprising: an orthogonalizing step of multiplying each layer of reference signal selectively by one of a plurality of orthogonal cover codes (OCCs) with the same length wherein the OCC multiplied to a first layer of reference signal can be configured as different from those multiplied to other layers of reference signals; and a scrambling step of multiplying all of symbols obtained from the OCC multiplied to each of the other layers of reference signals by a symbol-common scrambling sequence wherein the symbol-common scrambling sequences can be different from each other for reference signals multiplied by the same OCC. | 12-04-2014 |
20140369307 | INTEGRATED CIRCUIT FOR SPREADING RESPONSE SIGNAL - A radio communication apparatus receives control information on one or more control channel elements (CCEs) with consecutive CCE number(s). The radio communication apparatus first-spreads a response signal with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of the one or more CCEs, and second-spreads the first-spread response signal with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index. One of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is associated with an odd CCE number, and another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is associated with an even CCE number. | 12-18-2014 |
20140369391 | INTEGRATED CIRCUIT FOR SPREADING RESPONSE SIGNAL - A radio communication apparatus receives control information on one or more control channel elements (CCEs) with consecutive CCE number(s). The radio communication apparatus first-spreads a response signal with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of the one or more CCEs, and second-spreads the first-spread response signal with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index. One of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is associated with an odd CCE number, and another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is associated with an even CCE number. | 12-18-2014 |
20140369437 | RECEIVER DEVICE, TRANSMITTER DEVICE, RECEPTION METHOD, AND TRANSMISSION METHOD - Provided is a receiver device that can switch between transmission methods, while minimizing increase in the number of blind decryption iterations and the amount of signaling needed for acknowledgement. In this device, a receiver part ( | 12-18-2014 |
20140376487 | TRANSMISSION DEVICE, RECEPTION DEVICE, AND METHOD FOR CONTROLLING TRANSMISSION POWER - This transmission device can notify of a control value pertaining to transmission power without causing an increase in the amount of signaling. A control unit ( | 12-25-2014 |
20150043497 | COMMUNICATION APPARATUS AND RETRANSMISSION CONTROL METHOD - Provided are a communication apparatus and a method for receiving a response signal transmitted from a terminal configured with one or more downlink component carriers. The communication apparatus includes a transmitting section and a receiving section. The transmitting section is configured to transmit, to the terminal, downlink assignment information indicating one or more resources for downlink data, each of the one or more resources being assigned to one of the one or more downlink component carrier(s), and configured to transmit the downlink data to the terminal. The receiving section is configured to receive one or more response signals for the downlink data, which are transmitted from the terminal. The terminal makes the phase points of the response signals different in accordance with a number of downlink data which has been successively received. | 02-12-2015 |
20150074482 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing overhead of retransmission control signaling. Where a retransmission control method is employed with adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>2/3, two bits are set. In a case where the encoding rate 1/303-12-2015 | |
20150078195 | RADIO RECEPTION APPARATUS, RADIO TRANSMISSION APPARATUS, AND RADIO COMMUNICATION METHOD - Where first and second reference signals for a first and second communication system, respectively, are transmitted, resources that affect a reception apparatus compatible only with the first communication system can be minimized, and the throughput can be prevented from being deteriorated. As resources for a reference signal CSI-RS for LTE-A, last half symbols in a time direction of a resource unit RB/Sub-frame defined in a frequency-time domain are used, and the CSI-RS is allocated in a position up to the last two symbols or in the last symbol, or the like, of a particular RB/Sub-frame and transmitted when a reference signal 4RS for LTE is transmitted to a reception apparatus in addition to transmitting CSI-RS for LTE-A. The reception apparatus receives CSI-RS allocated in the last half symbol of RB/Sub-frame based on CSI-RS allocation information, measures channel quality by using this CSI-RS, and transmits and reports feedback information. | 03-19-2015 |
20150085809 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A data alignment method capable of preventing degradation in demodulation performance due to variation in signal qualities when a data signal to which a Turbo code is applied is transmitted simultaneously from a plurality of cells. The method divides signal components to be used for data alignment into resources common to all the cells and resources dependent on the cells and transmits encoded and rate-matched data with the first half thereof aligned to the resources common to all the cells and the second half thereof aligned to the resources dependent on the cells. | 03-26-2015 |