Patent application number | Description | Published |
20100110986 | BASE STATION DEVICE, TERMINAL DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A base station device performs communication with terminal devices, and includes a load information acquisition section which acquires load information which shows a load on the base station device, a reporting method selection section which selects a reporting method for the terminal devices to report reception state information to the base station device based on load information acquired by the load information acquisition section, and a reporting section which reports the reporting method selected by the reporting method selection section to the terminal devices. | 05-06-2010 |
20100195597 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, COMMUNICATION SYSTEM AND TRANSMISSION METHOD - A transmission apparatus which communicates with a reception apparatus is provided. The transmission apparatus includes a transmission parameter control unit which sets a transmission parameter of at least one of the multiplex channels to be different from those of the other channels, and a transmission unit which transmits information indicating a signal detection order for the multiplex channels to the reception apparatus. | 08-05-2010 |
20100246553 | WIRELESS TRANSMISSION DEVICE, WIRELESS COMMUNICATION SYSTEM AND WIRELESS TRANSMISSION METHOD - A wireless transmission device which communicates with a wireless reception device, includes: a reception quality setting unit which sets the reception quality of at least one code channel among a plurality of code channels to be multiplexed to be different from the reception quality of the other code channels; and a transmitting unit which transmits a signal which has the reception quality set by the reception quality setting unit and is generated by multiplexing the plurality of code channels, to the wireless reception device. | 09-30-2010 |
20100325505 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, RECEPTION METHOD, AND COMMUNICATION METHOD - A communication device used in a communication system requesting a retransmission signal when detecting an error in a received initial transmission signal, the communication device including: a reception unit which receives the initial transmission signal and the retransmission signal; a synthesis unit which synthesizes a signal based on a retransmission signal and at least one of a signal based on the retransmission signal or the initial transmission signal, when the reception unit receives the retransmission signal; and an iterative detection and decoding unit which performs signal decoding based on a signal obtained through the synthesis in the synthesis unit, thereby reducing the number of retransmissions and the number of iterations of the iteration process. | 12-23-2010 |
20100325510 | TRANSMISSION DEVICE, RECEPTION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A reception device which communicates with a transmission device, the reception device including: a reception unit which receives a signal in which a plurality of data signals are multiplexed, from the transmission device; a data signal detection unit which detects transmission data included in the plurality of data signals from the reception signal received by the reception unit, and outputs the detected transmission data and success/failure of transmission data detection for each data signal; a selection unit which selects some of data signals for which the transmission data detection is not successful among the plurality of multiplexed data signals; a success/failure information signal generation unit which generates success/failure information in data signals for which the transmission data detection is successful and the selected data signals; and a report transmission unit which reports the success/failure information to the transmission device. | 12-23-2010 |
20100329368 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, RECEPTION METHOD, AND COMMUNICATION METHOD - A second communication device which communicates with a first communication device, the second communication device including: a reception unit which receives an initial transmission signal and at least one retransmission signal; and an iterative detection and decoding unit which performs iterative processes of signal detection and signal decoding for at least one received signal among received signals received by the reception unit, wherein the iterative detection and decoding unit includes: a combining unit which combines a result of signal detection obtained from at least one other received signal in one of the iterative processes. | 12-30-2010 |
20110007729 | RECEPTION DEVICE, TRANSMISSION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A reception device which communicates with a transmission device, the reception device including: a reception unit which receives a signal in which a plurality of data signals are multiplexed, from the transmission device; and a data signal detection unit which determines whether detection of transmission data for each data signal from the reception signal received by the reception unit is successful. The reception unit further receives, from the transmission device, a retransmission data signal corresponding to at least one of data signals for which transmission data detection has failed among the plurality of multiplexed data signals. The data signal detection unit determines whether re-detection of the transmission data included in the data signal corresponding to the retransmission data signal among the plurality of multiplexed data signals and a data signal not corresponding to the at least one retransmission data signal, from the reception signal and the retransmission data signal, is successful. | 01-13-2011 |
20110007784 | RELAY DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - Even when an amplifier has a comparatively narrow linear region in a terminal, it is possible to suppress degradation of the transmission characteristic by using single-carrier transmission between the terminal and a relay device while using multi-carrier transmission between the relay device and a base station on an uplink of a communication system. The relay station ( | 01-13-2011 |
20110044382 | RECEIVING APPARATUS AND COMMUNICATION SYSTEM - A receiving antenna diversity effect is improved by equalizing the likelihood while exchanging the likelihood among a plurality of equalizers. A receiving apparatus ( | 02-24-2011 |
20110044409 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, RECEPTION METHOD, AND PROGRAM - A communication device including: a reception unit which receives signals including an initial transmission signal and signals including retransmission signals for the same data; a signal detection unit which detects at least two signals among the initial transmission signal and the plurality of retransmission signals for the same data from the received signal using the result of a decoding process; a combining unit which combines at least two signals detected by the signal detection unit; and a decoding unit which obtains the result of the decoding process by decoding the combined signal; wherein the detection by the signal detection unit, the combining by the combining unit, and the decoding by the decoding unit are iteratively performed with respect to the plurality of signals for the same data. | 02-24-2011 |
20110066911 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, RECEPTION METHOD, AND COMMUNICATION METHOD - Provided is a communication device which performs a hybrid automatic repeat request process of requesting a transmission source to perform retransmission when an error is detected from a received signal. The communication device includes: a reception unit that receives a signal into which an initial transmission signal and a retransmission signal are multiplexed among signals including the initial transmission signal and the retransmission signal for any one signal; a detection order decision unit that decides an order of detection of the initial transmission signal and the retransmission signal from the signal received by the reception unit in response to the number of retransmissions of the initial transmission signal and the retransmission signal which are included in the signal received by the reception unit; and a signal detection unit that removes an interference component from the signal received by the reception unit by using a signal detected by the communication device according to the order decided by the detection order decision unit, and that detects the initial transmission signal and the retransmission signal. An increase of delay can be prevented when retransmission is repeated. | 03-17-2011 |
20110097994 | BASE STATION APPARATUS, RELAY STATION APPARATUS, AND COMMUNICATION SYSTEM - Provided is a communication system that can allocate resources on an uplink for a CQI report, and can reduce the overhead of the CQI relay transmission from a relay station apparatus to a base station apparatus. To each mobile station apparatus ( | 04-28-2011 |
20110122807 | BASE STATION APPARATUS, RELAY STATION APPARATUS, AND COMMUNICATION SYSTEM - Provided is a communication system that can allocate resources on an uplink for a CQI report, and can reduce the overhead of the CQI relay transmission from a relay station apparatus to a base station apparatus. To each mobile station apparatus ( | 05-26-2011 |
20110126072 | COMMUNICATION DEVICE, COMMUNICATION SYSTEM, RECEPTION METHOD AND COMMUNICATION METHOD - A communication device includes: a reception unit which receives a signal including an initial transmission signal and a retransmission signal for any one signal; a detection order determination unit which determines an order of detection of the initial transmission signal and the retransmission signal from the signal received by the reception unit, according to retransmission repetition numbers of the initial transmission signal and the retransmission signal; and a signal detection unit which detects signals including detected signals for the initial transmission signal and the retransmission signal from the signal received by the reception unit using signals detected by the communication device according to the order determined by the detection order determination unit. The signal detection unit includes a combining unit which combines the detected retransmission signal and a signal detected from a previously received signal including at least one related signal received earlier than the retransmission signal. | 05-26-2011 |
20110134871 | COMMUNICATION SYSTEM, MOBILE STATION DEVICE, BASE STATION DEVICE, AND COMMUNICATION METHOD - The base station device includes: a signal transmission unit which transmits a signal in which data is assigned in a natural number of resource blocks located in a frequency axis in each of a plurality of bands and a signal including information specifying the plurality of bands to the mobile station device. The mobile station device includes: a signal reception unit which receives the signal including the information specifying the plurality of bands from the signal transmission unit via any of the plurality of bands, and receives the signal in which the data is assigned in the natural number of resource blocks located in the frequency axis in each of the plurality of bands from the signal transmission unit based on the information specifying the plurality of bands; and a data extraction unit which extracts data from the signal in which the data is assigned in the natural number of resource blocks located in the frequency axis received by the signal reception unit. | 06-09-2011 |
20110149792 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION SYSTEM - A CQI control unit | 06-23-2011 |
20110188442 | RELAY APPARATUS, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A relay apparatus compresses an information amount of channel quality information notified from a plurality of terminal apparatuses to notify a control station apparatus, and thereby improves spectral efficiency. The relay apparatus | 08-04-2011 |
20110200071 | WIRELESS COMMUNICATION SYSTEM, CONTROL STATION APPARATUS AND TERMINAL APPARATUS - To switch among access schemes of different systems efficiently, in a wireless communication system for selecting one access scheme from among a plurality of access schemes to perform wireless communications in between a control station apparatus and a terminal apparatus, the control station apparatus notifies the terminal apparatus of an access scheme using information indirectly designating the access scheme, and the terminal apparatus selects one access scheme from among a plurality of access schemes according to the notified information to perform wireless communications with the control station apparatus. | 08-18-2011 |
20110216711 | BASE STATION APPARATUS, TERMINAL APPARATUS AND COMMUNICATION SYSTEM - Reception quality measurement results of respective channels which have been outputted from a reception quality measuring section | 09-08-2011 |
20110256868 | BASE STATION DEVICE, MOBILE STATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A communication system which performs communication between a base station device configuring at least one cell and a mobile station device, wherein: the base station device includes: a synchronization signal generation unit which generates a synchronization signal corresponding to a cell identity for identifying a cell; and a transmission unit which generates a first transmission signal including the synchronization signal using a first parameter obtained from the cell identity, generates a second transmission signal excluding the synchronization signal using a second parameter obtained from a virtual cell identity different from the cell identity, transmits the first transmission signal using a first frequency band, and transmits the second transmission signal via a second frequency band different from the first frequency band. The mobile station device includes: a reception unit which receives a first reception signal including the synchronization signal using the first parameter obtained from the cell identity via the first frequency band and receives a second reception signal using the second parameter obtained from the virtual cell identity via the second frequency band. | 10-20-2011 |
20110280189 | BASE STATION APPARATUS, MOBILE STATION APPARATUS, AND MOBILE COMMUNICATION SYSTEM - To keep PAPR low even when the same physical cell ID is used in each component carrier, a base station apparatus | 11-17-2011 |
20110305286 | TRANSMISSION APPARATUS, TRANSMISSION METHOD, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - In a transmission apparatus which multicarrier-modulates and transmits symbols, which are basic units of digital signals, a subcarrier in which a symbol is arranged in a first multicarrier symbol having a first guard interval and a subcarrier in which a symbol is arranged in a second multicarrier symbol having a second guard interval longer than the first guard interval are scattered among a plurality of subcarriers constituting a multicarrier at the same time. Therefore, it is possible to improve the resistance to inter-symbol interference without substantially degrading transmission efficiency. | 12-15-2011 |
20120009959 | COMMUNICATION SYSTEM AND MOBILE STATION APPARATUS - A mobile communication system comprised of one or a plurality of base station apparatuses and a mobile station apparatus; characterized in that the one or plurality of base station apparatuses positions one or a plurality of logical antenna port reference signals, which are inside one or a plurality of logical antenna ports respectively, to different sub-frames; and the mobile station apparatus uses the logical antenna port reference signals of the one or plurality of logical antenna ports to perform channel status measurement. | 01-12-2012 |
20120033571 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION DEVICE, AND WIRELESS COMMUNICATION METHOD - A wireless communication system includes a first channel state measurer and a second channel state measurer. When a second communication device measures a state of a channel between the second communication device and a first communication device using reference signals transmitted from the first communication device, the first channel measurer is configured to measure a state of the channel including an interference due to a signal transmitted from another first communication device. When measuring the state of the channel between the second communication device and the first communication device using the reference signals transmitted from the first communication device, the second channel state measurer measures the state of the channel while suppressing the interference due to the signal transmitted from the another first communication device. Accordingly, the wireless communication system can generate adequate feedback information both when cooperative communication is performed and when cooperative communication is not performed. | 02-09-2012 |
20120033604 | BASE STATION DEVICE, TERMINAL DEVICE, RADIO COMMUNICATION SYSTEM, TRANSMISSION METHOD, RECEPTION METHOD, AND PROGRAM - A base station device, a terminal device to communicate with a base station device, and a transmission method are disclosed. The base station device includes an indicating part that indicates the availability of the coordinated communication. The base station device also includes a determining part that determines, in accordance with the availability of the coordinated communication, the ratio of the power of a data signal with respect to a transmission symbol including a reference signal to the power of a data signal with respect to a transmission symbol not including a reference signal. | 02-09-2012 |
20120088458 | TRANSMISSION DEVICE, RECEIVING DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A transmission device includes: a transmitting unit that transmits a common reference signal and a receiving device-specific reference signal to a receiving device; a selecting unit that selects either a first mode reporting a receiving quality using only the common reference signal or a second mode reporting a receiving quality using at least the receiving device-specific reference signal; and a notifying unit that notifies a mode selected by the selecting unit to the receiving device. | 04-12-2012 |
20120106610 | TRANSMITTER APPARATUS, RECEIVER APPARATUS, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A transmitter apparatus includes a reference signal transmitting unit that transmits a both of a first reference signal and a second reference signal differing from the first reference signal to a first receiver apparatus performing non-cooperative communication and to a second receiver apparatus performing cooperative communication, respectively. In addition, the transmitter apparatus includes a notifying unit that instructs the first receiver apparatus to measure the first reference signal and that instructs the second receiver apparatus to measure the second reference signal. | 05-03-2012 |
20130250863 | BASE STATION DEVICE, MOBILE STATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A communication system which performs communication between a base station device configuring at least one cell and a mobile station device, wherein: the base station device includes: a synchronization signal generation unit which generates a synchronization signal corresponding to a cell identity for identifying a cell; and a transmission unit which generates a first transmission signal including the synchronization signal using a first parameter obtained from the cell identity, generates a second transmission signal excluding the synchronization signal using a second parameter obtained from a virtual cell identity different from the cell identity, transmits the first transmission signal using a first frequency band, and transmits the second transmission signal via a second frequency band different from the first frequency band. The mobile station device includes: a reception unit which receives a first reception signal including the synchronization signal using the first parameter obtained from the cell identity via the first frequency band and receives a second reception signal using the second parameter obtained from the virtual cell identity via the second frequency band. | 09-26-2013 |
20140219318 | WIRELESS COMMUNICATION SYSTEM, CONTROL STATION APPARATUS AND TERMINAL APPARATUS - A control station apparatus comprising a transmitter that is configured to transmit, to a terminal apparatus, information indicating an allocation method for allocating frequency signals to a plurality of subcarriers, where the information indicates a communication scheme which is one of Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme and Clustered Discrete Fourier Transform-spread-OFDM (Clustered DFT-S-OFDM) scheme. | 08-07-2014 |
20140233504 | COMMUNICATION SYSTEM, MOBILE STATION DEVICE, AND COMMUNICATION METHOD - A mobile station device includes an information acquisition unit that is configured to and/or programmed to acquire information, which specifies a system bandwidth and a carrier frequency of a second downlink carrier component different from a first downlink carrier component, transmitted using RRC signaling via a physical downlink shared channel within the first downlink carrier component and a communication unit that is configured to communicate with the base station device by aggregate use of both the first downlink carrier component and the second downlink carrier component, where the first downlink carrier component and the second downlink carrier component have different carrier frequencies and each of the first downlink carrier component and the second downlink carrier component has its own downlink system bandwidth. | 08-21-2014 |
20140269576 | TRANSMITTER APPARATUS, RECEIVER APPARATUS, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A terminal apparatus, that communicates with a base station apparatus, includes an acquiring unit that acquires first information and second information, where the first information specifies a first subframe and the second information specifies a second subframe and a reception quality information transmitting unit that transmits a first channel quality indicator and a second channel quality indicator, where the first channel quality indicator based on or being associated with the first subframe and the second channel quality indicator based on or being associated with the second subframe, and where the first information and the first subframe are different from the second information and the second subframe, respectively. | 09-18-2014 |
20140321394 | COMMUNICATION SYSTEM, MOBILE STATION DEVICE, BASE STATION DEVICE, AND COMMUNICATION METHOD - A mobile station device transmits channel quality indicators for a plurality of system bands, wherein each of the plurality of system bands includes a plurality of subbands comprising a set of contiguous resource blocks, and wherein each of the channel quality indicators is derived to satisfy a condition assuming a subband of the plurality of subbands, and wherein the number of the resource blocks within the subband is based on a frequency bandwidth of a system band of the plurality of system bands and the system band includes the subband. | 10-30-2014 |
20140334412 | WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE STATION APPARATUS, WIRELESS COMMUNICATION METHOD AND INTEGRATED CIRCUIT - A terminal apparatus that is set to monitor physical downlink control channel candidates in a common search space and a user equipment-specific search space on a downlink component carrier, which are with cyclic redundancy check scrambled by C-RNTI (Cell Radio Network Temporary Identifier), with a same first control channel element index, and with downlink control information of a common payload size and different downlink control information field sets. The terminal apparatus also assumes that, for the physical downlink control channel candidates with the cyclic redundancy check scrambled by the C-RNTI, only either a physical downlink control channel in the common search space or a physical downlink control channel in the user equipment-specific search space is transmitted on the downlink component carrier. | 11-13-2014 |
20140334454 | TRANSMISSION DEVICE, RECEPTION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A transmission device that generates control information including 3-bit information and transmits a physical downlink shared channel, a reference signal for demodulation of the physical downlink shared channel, and the control information, wherein, in a case that all codewords which are mapped to the physical downlink shared channel are enabled, among a first value to an eighth value indicated by the 3-bit information, the third value to the eighth value indicate that the number of layers is from 3 to 8 respectively, and the first value and the second value indicate that the number of layers is equal to 2, and the first value indicates that the scrambling identity for the reference signal is equal to 0 and the second value indicates that the scrambling identity is equal to 1. | 11-13-2014 |