Patent application number | Description | Published |
20090168714 | RADIO COMMUNICATION APPARATUS AND CONTROL METHOD FOR RADIO COMMUNICATION SYSTEM - A control method for a radio communication system, wherein a first apparatus transmits a radio signal used to select a radio resource to a second apparatus and when the second apparatus receives a radio signal for requesting allocation of a radio resource from the first apparatus, the second apparatus selects a radio resource to be allocated to the first apparatus based on a radio signal used to select the radio resource and transmits information of the selected radio resource to the first apparatus Consequently, the first apparatus transmits transmission data by using the radio resource specified by the information. The method includes regulating transmission of the radio signal used to select the radio resource to be allocated when the first apparatus receives a particular signal from the second apparatus. | 07-02-2009 |
20090209276 | COMMUNICATION APPARATUS - Node-B transmits a power profile of each frequency of transmission data as a step function to a UE. Each UE measures the amount of interference of a received signal, evaluates SINR over the entire frequency band with the power of the received signal, and transmits the evaluation result to Node-B. Node-B evaluates the interference profile in Node-B from the information about the SINR transmitted from the UE and the power of the transmission signal, and determines the frequency profile of the power of the signal transmitted to the UE. | 08-20-2009 |
20090232043 | DATA RELAYING APPARATUS, COMMUNICATION APPARATUS, AND DATA RELAYING METHOD - A data relaying apparatus for relaying data bidirectionally transmitted between a first communication apparatus and a second communication apparatus includes a first symbol string generator configured to generate, in accordance with a first modulation method, a first symbol string from first data transmitted from the second communication apparatus; a second symbol string generator configured to generate, in accordance with a second modulation method, a second symbol string from second data transmitted from the first communication apparatus; and a combining unit configured to combine a first symbol of the first symbol string and a second symbol of the second symbol string by calculating an exclusive OR on the first symbol and the second symbol to generate a third symbol string to be multicasted to the first communication apparatus and the second communication apparatus. | 09-17-2009 |
20090307559 | TRANSMITTER, RECEIVER, TRANSMISSION METHOD, AND RECEPTION METHOD - A predetermined logical operation is performed to unsent data which is sent toward the receiver | 12-10-2009 |
20090318088 | Wireless Communication Device and Method for Controlling Beam to be Transmitted - A controller controls the direction of a beam to be transmitted toward a correspondent wireless communication device to transmit a first wireless signal to the correspondent wireless communication device, and controls the direction of the beam within a predetermined shift from the direction of the first wireless signal, thereby transmitting a second wireless signal at a first timing before or a second timing after the timing of the control for the first wireless signal. | 12-24-2009 |
20100100787 | TRANSMISSION DATA GENERATING APPARATUS AND RECEIVER - This invention proposes a transmission data generating apparatus for use in a transmitter of a communication system, which transmission data generating apparatus comprises a redundancy data obtaining unit for obtaining redundancy data of information data which was transmitted to a receiver and was not received successfully by the receiver; a new data obtaining unit, for extracting new data, which has not been transmitted to the receiver; and a combination unit, for combining the redundancy data and the new data to form a transmission data to be subsequently transmitted to the receiver. This invention enhances the success rate of decoding the new data in primarily transmitted data and retransmitted data, and enhances system throughput. | 04-22-2010 |
20100203826 | DATA RELAY APPARATUS, COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A data relay apparatus includes a first demodulating unit, demodulating a modulation signal of a first modulation mode from a first transmission source; a second demodulating unit, demodulating a modulation signal from a second transmission source, having a modulation mode higher than the first modulation mode; a combination controlling unit, providing a mapping rule necessary for performing signal combination in accordance with the modulation mode of the modulation signal from each of the first and second transmission source, the mapping rule to map the demodulated modulation signal from the first transmission source together with the demodulated modulation signal from the second transmission source to a constellation of symbols of the second modulation mode; a data combining unit, performing data combination on the demodulated modulation signal from the first transmission source and the demodulated modulation signal from the second transmission source according to the mapping rule. | 08-12-2010 |
20110064030 | BASE STATION DEVICE AND DATA MAPPING METHOD - A base station device includes a determining unit that determines a combination of a plurality of users having different reception qualities, an allocating unit that generates a plurality of hierarchical modulation channels having different qualities based on channel elements constituting channels corresponding to the respective users in the combination determined by the determining unit, and allocates the hierarchical modulation channels to the respective users such that a hierarchical modulation channel having a higher quality is allocated to a user having a lower reception quality, a mapping unit that maps data for each user to the hierarchical modulation channel allocated to each user by the allocating unit, and a transmitting unit that transmits the data mapped by the mapping unit. | 03-17-2011 |
20110078529 | ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD - A new-part acquiring unit acquires a part of a block generated by a block generating unit, as a new part to be contained in a packet. A retransmission-part acquiring unit acquires a part of a block corresponding to a NAK as a retransmission part to be contained in a packet among blocks held in a retransmission buffer unit. An encoding unit groups a new part acquired by the new-part acquiring unit and a retransmission part acquired by the retransmission-part acquiring unit, and generates a packet. A modulating unit modulates a packet output from the encoding unit. A wireless processing unit performs a predetermined wireless transmission process to a modulated packet, and transmits a processed modulated packet via an antenna. | 03-31-2011 |
20110110284 | NETWORK CODING METHOD AND NETWORK CODING APPARATUS - A base station BS transmits downlink data to a relay station RS. A mobile station MS transmits uplink data to the relay station RS. The relay station RS determines a first modulation scheme for transmitting the uplink data to the base station BS, and determines a second modulation scheme for transmitting the downlink data to the mobile station MS. The relay station RS multiplies a symbol sequence obtained by the first modulation scheme by a symbol sequence obtained by the second modulation scheme for each symbol, and multicasts the multiplication result to the base station BS and the mobile station MS. | 05-12-2011 |
20110142143 | Sending Apparatus, Receiving Apparatus, Sending Method, And Receiving Method - In a sending apparatus, a storage section stores information which associates a first communication quality and a second communication quality with hierarchical modulation methods each using a plurality of channels. On the basis of the information stored in the storage section, a control section selects a hierarchical modulation method corresponding to the first communication quality which is a communication quality for a receiving apparatus and the second communication quality which is a communication quality for a receiving apparatus. A sending section maps data a destination of which is the receiving apparatus and data a destination of which is the receiving apparatus to the plurality of channels according to the hierarchical modulation method selected, and transmits the data. | 06-16-2011 |
20110158349 | RADIO TRANSMISSION DEVICE AND MODULATION METHOD - A radio transmission device includes a modulation unit that maps a transmission bit sequence to a symbol corresponding to any one signal point by using a constellation in which a plurality of congruent equilateral triangles having a signal point as an apex are formed in each of four quadrants of an IQ plane representing an in-phase component and a quadrature component of a signal, two arbitrary neighboring equilateral triangles share one side, and signal points closest to an original point in the four quadrants form two neighboring equilateral triangles that share one side. The radio transmission device also includes a transmission unit that transmits the symbol obtained by mapping performed by the modulation unit. | 06-30-2011 |
20110194518 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, COMMUNICATION SYSTEM AND COMMUNICATION METHOD USING ADAPTIVE HYBRID AUTOMATIC RETRANSMISSION REQUEST METHOD - A transmission apparatus includes a first encoding unit configured to generate a new packet from a new portion obtained from a block generated from information bits, to generate a retransmission packet from a retransmission portion obtained from a block generated from information bits and held for a retransmission, and to assign the new packet and the retransmission packet to a communication channel respectively, a second encoding unit configured to assign, to a communication channel, a packet obtained by mixing the new portion and the retransmission portion, a encoding method switching unit configured to switch between operations of the first and second encoding unit, so that communication channel data output from the first or second encoding unit is transmitted, and a transmission control unit configured to control the encoding method switching unit based on information indicating a communication quality of the communication channel in a reception apparatus. | 08-11-2011 |
20110199956 | RADIO COMMUNICATION METHOD, SYSTEM AND APPARATUS FOR REUSING CHANNEL RESOURCE - A radio communication method includes receiving first data transmitted from a first radio communication apparatus at a second radio communication apparatus and at a third radio communication apparatus | 08-18-2011 |
20110199975 | WIRELESS BASE STATION DEVICE USING COLLABORATIVE HARQ COMMUNICATION SYSTEM, WIRELESS TERMINAL DEVICE, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - In a transmission device on a serving eNB side, a first packet transmission unit performs an operation of transmitting a retransmission data packet. On the other hand, in a transmission device on a collaborative eNB side, a second packet transmission unit performs an operation of transmitting a new data packet corresponding to information transferred from the serving eNB by the packet transfer unit. The control information about a communication to a UE by the serving eNB and the collaborative eNB is communicated by using only a PUCCH from the UE to the serving eNB and a PDCCH from the serving eNB to the UE. The serving eNB and the collaborative eNB perform communications of a new data packet and communication control information etc. through an X2 interface. | 08-18-2011 |
20110255616 | RADIO COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION, AND RADIO COMMUNICATION METHOD - A radio communication system includes a reception apparatus and a transmission apparatus. The reception apparatus includes a first wireless communication interface and a first processor. The transmission apparatus includes a second wireless communication interface configured to transmit a wireless signal to the reception apparatus and a second processor configured for generating a plurality of data blocks and a grouped data block obtained by grouping the plurality of data blocks and controlling the second wireless communication interface to transmit the plurality of data blocks through a first radio transmission path, and to transmit the grouped data block through a second radio transmission path better in radio transmission quality than the first radio transmission path. The first processor is configured for controlling the first wireless communication interface to receive the plurality of data blocks transmitted through the first radio transmission path, the grouped data block transmitted through the second radio transmission path. | 10-20-2011 |
20110263198 | RADIO COMMUNICATION SYSTEM, BASE STATION, RELAY STATION, AND MOBILE STATION - A radio communication system includes a base station, a mobile station, and a relay station which is provided for each sector, and divides an assigned band into a plurality of sub-bands for use. A different sub-band is used for each sector for a first communication link. A sub-band different from the sub-band in the first communication link is used for each sector for a second communication link. When a mobile station is located in a first zone, substantially the same sub-band as the second communication link is used in each sector for a third communication link. When a mobile station is located in a second zone farther from the base station than the first zone, a sub-band different from those of the first communication link and the second communication link is used for a fourth communication link. Thus, the interference among the communication links can be suppressed. | 10-27-2011 |
20110271162 | TRANSMITTER DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - In a communication system, a transmitter device transmits data to a receiver device for performing error-correcting decoding processing by combining received data and retransmitted data. The transmitter device selects one of a first set of schemes of an M number of modulation and coding schemes as a modulation and coding scheme (MCS) of first data according to communication quality information obtained from the receiver device when the first data is initially transmitted, and selects one of a second set of schemes of an N number of MCSs (N11-03-2011 | |
20110281607 | RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, TERMINAL APPARATUS, AND RADIO COMMUNICATION METHOD IN RADIO COMMUNICATION SYSTEM - A radio communication system including: a base station apparatus; and a terminal apparatus, wherein the base station apparatus includes: five or more transmission antennas; and a processor configure for holdings first scheduling information including a data channel region and a control channel region, and in which each of resources of a common reference signal transmitted from each of the fifth and subsequent transmission antennas is allocated respectively, to be different region from first region to that each of resources of a common reference signal transmitted from each of the transmission antennas up to an m-th antenna (m being an integer that satisfies 1≦m<5) is allocated, to overlap the data channel region to that a data is allocated or the control channel region to that a control signal is allocated, and to be a different region each other. | 11-17-2011 |
20110281608 | CHANNEL ESTIMATING APPARATUS, CHANNEL ESTIMATING METHOD, BASE STATION, AND COMMUNICATION SYSTEM - A channel estimating apparatus includes a receiver that receives reference signal groups that are respectively transmitted from wireless communications units and that each include a reference signal that is allocated a common channel resource allocated to a reference signal in another reference signal group; a first estimating unit that based on a reference signal that is in a first reference signal group among the received reference signal groups and that is allocated a unique channel resource not allocated to a reference signal in another reference signal group, estimates a reference signal that is in the first reference signal group and allocated the common channel resource; and a second estimating unit that based on the reference signal estimated by the first estimating unit, estimates a reference signal that is in a second reference signal group among the received reference signal groups and that is allocated the common channel resource. | 11-17-2011 |
20120014475 | MULTI-ANTENNA COMMUNICATION APPARATUS AND METHOD OF MULTI-ANTENNA COMMUNICATION - To reduce an error rate of received data, a MIMO processing unit receives data transmitted from a transmitter via antennas and separates packets of layers | 01-19-2012 |
20120020236 | TRANSMISSION APPARATUS, RECEIVING APPARATUS, AND RADIO COMMUNICATION METHOD - A transmission apparatus includes (N+1) or more transmission antennas. A first receiving apparatus detects N or fewer transmission antennas from a received signal. A second receiving apparatus detects more than N transmission antennas from a received signal. The transmission apparatus uses a first radio resource for outputting a known signal from each of transmission antennas and uses a second radio resource for outputting a known signal from at least one of the transmission antennas. A timing difference between the first and second radio resources is smaller than or equal to a first determined difference and a frequency difference therebetween is smaller than or equal to a second determined difference. The first receiving apparatus estimates a channel state based on the known signal outputted on the first radio resource. The second receiving apparatus estimates a channel state based on the known signals outputted on the first and second radio resources. | 01-26-2012 |
20120058730 | MODULATION SWITCHING METHOD, TRANSMISSION STATION, AND RECEIVING STATION - A modulation switching method performed in a radio communication system is disclosed. In the method, difference information between the first channel quality information fed back from the receiving station and second channel quality information used to determine a modulation method is generated and is sent as control information is sent to the receiving station, with the transmission station. Switch information from the difference information received as the control information and third channel quality information being previous information in the receiving station are acquired, and data signal is demodulated based on the switch information, with the receiving station. | 03-08-2012 |
20120063523 | COMMUNICATION SYSTEM, INFORMATION TRANSMISSION METHOD, CODE SETTING METHOD, BASE STATION, AND MOBILE STATION - A communication system includes a communication station that converts a value information into a code value based on a corresponding relationship in which a difference between a first value information and a second value information is set to any value equal to or greater than two, where the second value information corresponds to a code value where an error occurs in one bit of the code value corresponding to the first value information. | 03-15-2012 |
20120077530 | WIRELESS COMMUNICATION DEVICE AND METHOD FOR CONTROLLING BEAM TO BE TRANSMITTED - A controller controls the direction of a beam to be transmitted toward a correspondent wireless communication device to transmit a first wireless signal to the correspondent wireless communication device, and controls the direction of the beam within a predetermined shift from the direction of the first wireless signal, thereby transmitting a second wireless signal at a first timing before or a second timing after the timing of the control for the first wireless signal. | 03-29-2012 |
20130019137 | ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD - A decoder that includes a receiving unit that receives a packet containing a new part corresponding to an information bit not yet received and a retransmission part corresponding to an information bit received in past; a combining unit that combines a part of a previously received packet corresponding to the retransmission part with the packet received by the receiving unit; and a new-part decoding unit that decodes the combined packet combined and obtained by the combining unit, and obtains a decoded result of the new part. | 01-17-2013 |
20140071926 | WIRELESS BASE STATION DEVICE USING COORDINATED HARQ COMMUNICATION SYSTEM, WIRELESS TERMINAL DEVICE, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A first base station and a second base station perform a coordinated transmission process to a wireless terminal. The first base station includes a transmission unit that transmits to the wireless terminal a first control channel which indicates new data or retransmission data. The wireless terminal includes: a control channel reception unit; a data reception unit for receiving data from the first base station and data coordinately transmitted from the second base station using a resource which is indicated by the first control channel; a control channel transmission unit that transmits a second control channel related to a retransmission of the data received by the data reception unit to at least the first base station; and a reception control unit that controls Hybrid Automatic Repeat reQuest (HARQ) process for data coordinately transmitted by at least the first base station and the second base station based on the first control channel. | 03-13-2014 |
20140079006 | WIRELESS BASE STATION DEVICE USING COORDINATED HARQ COMMUNICATION SYSTEM, WIRELESS TERMINAL DEVICE, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A wireless communication system in which a plurality of base station devices perform a coordinated transmission to a wireless terminal device. Including transmitting a first control channel indicating new data or retransmission data from a first base station device; receiving the first control channel, by a wireless terminal device, and receiving at least one of data transmitted by the first base station device using a resource indicated by the received first control channel and data coordinately transmitted by a second base station device using a resource indicated by the received first control channel; transmitting, by the wireless terminal device, a second control channel related to a retransmission of the received data; controlling, by the wireless terminal device, Hybrid Automatic Repeat reQuest (HARQ) process for data coordinately transmitted by at least the first base station device and the second base station device based on the first control channel. | 03-20-2014 |
20140098765 | WIRELESS BASE STATION DEVICE USING COORDINATED HARQ COMMUNICATION SYSTEM, WIRELESS TERMINAL DEVICE, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A wireless communication system, includes a first wireless base station; a second wireless base station that performs a coordinated transmission; and a wireless terminal, wherein the wireless terminal includes a reception control unit that identifies a physical downlink channel transmitted from any of the first and second wireless base station according to one or more reference signals; a data reception unit that is capable of receiving data transmitted by the first wireless base station using a resource indicated by a first control channel and receiving data coordinately transmitted by the second wireless base station using a resource indicated by the received first control channel, a control channel transmission unit that transmits a second control channel and the reception control unit further controls Hybrid Automatic Repeat reQuest (HARQ) process for data coordinately transmitted by the first wireless base station and the second wireless base station based on the first control channel. | 04-10-2014 |
20140105171 | CHANNEL ESTIMATING APPARATUS, CHANNEL ESTIMATING METHOD, BASE STATION, AND COMMUNICATION SYSTEM - A channel estimating apparatus includes a receiver that receives reference signal groups that are respectively transmitted from wireless communications units and that each include a reference signal that is allocated a common channel resource allocated to a reference signal in another reference signal group; a first estimating unit that based on a reference signal that is in a first reference signal group among the received reference signal groups and that is allocated a unique channel resource not allocated to a reference signal in another reference signal group, estimates a reference signal that is in the first reference signal group and allocated the common channel resource; and a second estimating unit that based on the reference signal estimated by the first estimating unit, estimates a reference signal that is in a second reference signal group among the received reference signal groups and that is allocated the common channel resource. | 04-17-2014 |