Patent application number | Description | Published |
20080212696 | Radio-Communication Device and Radio-Communication Method - The disclosed invention determines whether a reception packet is an MM packet or a GF packet with precision and avoids unnecessary decoding operations performed at the GF-packet-reception time and inefficient communications. | 09-04-2008 |
20090196365 | Wireless Communication Apparatus, Antenna Calibration Method and Program - A wireless communication apparatus includes a loopback transfer function acquisition section that, when a first path including all paths from each branch of the first set to each branch of the second set via the antenna is formed, acquires a loopback transfer function of each path included in the first path based on a reception status of a reference signal transmitted from each branch of the first set and received by each branch of the second set, and when a second path opposite to the first path is formed, acquires a loopback transfer function of each path included in the second path based on a reception status of a reference signal transmitted from each branch of the second set and received by each branch of the first set, and a calibration factor calculation section to calculate a calibration factor of each branch based on the acquired loopback transfer functions. | 08-06-2009 |
20090219184 | Signal Processor, Control Method, and Wireless Communication Device - There is provided a signal processor with a plurality of antennas connected for transmitting and receiving wireless signals, including a plurality of analog reception processing units, AD converters, DA converters, and analog transmission processing units, wherein each of the analog reception processing units converts the wireless signal received through the antenna into an analog baseband signal and outputs the signal to the AD converter, each of the DA converters converts the digital baseband signal into analog format and outputs the signal, and each of the analog transmission processing units shifts the frequency band of the analog baseband signal output from the DA converter to the high frequency side. The signal processor further includes a transmission switch which switches among the DA converters respectively connected to the analog transmission processing units and a reception switch which switches among the AD converters respectively connected to the analog reception processing units. | 09-03-2009 |
20090305629 | Receiving Apparatus, Receiving Method and Wireless Communication System - There is provided a receiving apparatus including a plurality of antennas, a phase difference detection unit to detect a phase difference of each of a plurality of received signals received by the plurality of antennas, a phase adjustment unit to align phase of the plurality of received signals based on the phase difference detected by the phase difference detection unit, an adding unit to add the plurality of received signals with the phase aligned by the phase adjustment unit together, and a synchronous detection unit to perform synchronous detection using a signal obtained by addition in the adding unit. | 12-10-2009 |
20090323591 | Receiving Apparatus, Receiving Method and Wireless Communication System - A receiving apparatus is provided which includes a receiving unit to receive a radio signal, a transfer function estimation unit to estimate a transfer function of a communication path of the radio signal, and a cross-correlation calculation unit to calculate cross-correlation between a synchronous signal contained in a radio signal received by the receiving unit and a known synchronous signal multiplied by the transfer function estimated by the transfer function estimation unit. | 12-31-2009 |
20100008406 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - A wireless communication apparatus compensates for phase and amplitude imbalances existing among transmit and receive branches, while also preventing likelihood information and SNR estimation error produced by such imbalance compensation. In an apparatus having a plurality of transmit and receive antennas and respective branches for each antenna, a calibration processor multiplies receive signals in each receive branch by antenna calibration coefficients, in order to correct phase and amplitude imbalances existing among the receive branches. A transmit beamforming matrix estimator then estimates a transmit beamforming matrix by using the multiplied receive signals. An estimator then solves for estimated values such as the noise power, likelihood information, and channel waveform equalization values for each receive branch, and in addition, derives a final estimated value that takes the multiplication by correction coefficients into account when averaging the estimated values for each receive branch or when computing a weighted average according to likelihood. | 01-14-2010 |
20100008407 | COMMUNICATION APPARATUS AND COMMUNICATION CALIBRATION METHOD - There is provided a communication apparatus, including a transmission unit that transmits information by a plurality of systems and a reception unit that receives information by a plurality of systems, wherein the transmission unit includes a calibration information generation unit that generates calibration information transmitted for each the system and a calibration information generation notification generation unit that generates a calibration information generation notification indicating that the calibration information has been generated by the calibration information generation unit for each system, and the reception unit includes a calibration information detection unit that starts measurement of time based on reception of the calibration information generation notification and detecting calibration information turned back by the transmission unit for each system after a fixed time passes after starting measurement of time. | 01-14-2010 |
20100009644 | Receiving Apparatus, Radio Communication System, Position Estimation Method and Program - There is provided a receiving apparatus including a plurality of receiving antennas, each of which receives a radio signal in which sub-carriers of different frequencies are multiplexed, a phase calculation unit that calculates a phase difference of each radio signal received by the plurality of receiving antennas from that of a reference signal for each of the sub-carriers contained in the radio signals, and a path difference calculation unit that calculates a path difference, which is a difference of distances from a transmitting antenna from which the radio signals are transmitted to any two receiving antennas of the plurality of receiving antennas, based on the phase difference calculated by the phase calculation unit. | 01-14-2010 |
20100015928 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - A wireless communication apparatus includes a plurality of antenna branches through which radio signals are transmitted and received; a calibration factor acquiring unit that acquires a calibration factor for compensating an unbalance of phase and amplitude between the antenna branches for every predetermined frequency band; a factor memory storing the calibration factor acquired for every predetermined frequency band; a reliability determining unit that determines a reliability of the calibration factor acquired by the calibration factor acquiring unit; and a calibration factor multiplying unit that reads out the calibration factor from the factor memory to multiply a transmission signal or a reception signal to be calibrated by the readout calibration factor. | 01-21-2010 |
20100020857 | APPARATUS AND METHOD FOR WIRELESS COMMUNICATION, AND COMPUTER PROGRAM - A wireless communication apparatus includes a plurality of antenna branches for transmitting and receiving a wireless communication signal, a calibration coefficient calculator for calculating a calibration coefficient for each frequency band, the calibration coefficient correcting an imbalance in phase and amplitude existing between the antenna branches, a coefficient storage memory for storing the calibration coefficient of each frequency band, a calibration coefficient reader for reading the calibration coefficient of a frequency band of one of a transmission signal and a reception signal as a target to be calibrated, a calibration coefficient interpolator for interpolating a calibration coefficient of the frequency band if the coefficient storage memory stores no corresponding calibration coefficient of the frequency band, and a calibration coefficient multiplier for multiplying one of the transmission signal and the reception signal by one of the read calibration coefficient and the interpolated calibration coefficient. | 01-28-2010 |
20100020891 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD, ENCODING APPARATUS AND ENCODING METHOD, AND COMPUTER PROGRAM - A wireless communication apparatus includes: plural antennas; a channel matrix acquiring unit acquiring a channel matrix for each sub-carrier; a channel matrix encoding unit encoding the acquired channel matrix of each sub-carrier, by decomposition from signals in fixed-point representation into data and amplitude parts with a predetermined bit width; and a channel matrix information delivery unit delivering the encoded channel matrix information to a communication party. The encoding unit retrieves a first maximum value as the maximum of channel matrix elements in all sub-carriers, in plural levels, and determines an amplitude part and a normalization coefficient for normalizing channel matrix elements to a data part having the predetermined bit width, based on a ratio between a second maximum value as the maximum of channel matrix elements with respect to each sub-carrier and the first maximum value, and multiples channel matrix elements by the normalization coefficient to obtain a data part. | 01-28-2010 |
20100026561 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - A wireless commutation device includes: an antenna unit including antennas transmitting and receiving wireless signals; an analog processing unit including transmitting analog circuits and receiving analog circuits processing analog transmitting and received signals; a digital processing unit processing digital transmitting and received signals; an inter-antenna propagation loss determination unit determining propagation losses between the antennas; a loopback transfer function gain acquisition unit acquiring, through loopback of a calibration signal between the antennas, gains of loopback transfer functions between antenna branches; a loopback transfer function gain correction unit correcting the gains by using the propagation losses; a correction coefficient determination unit determining the respective gain ratios among the receiving analog circuits and the transmitting analog circuits by using the corrected gains, and determining correction coefficients by using the gain ratios; and a gain calibration processing unit performing gain calibration on the digital transmitting and received signals by using the correction coefficients. | 02-04-2010 |
20100061357 | COMMUNICATION SYSTEM, A COMMUNICATION METHOD, AND A COMMUNICATION APPARATUS - A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity. | 03-11-2010 |
20100061358 | COMMUNICATION SYSTEM, A COMMUNICATION METHOD, AND A COMMUNICATION APPARATUS - A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity. | 03-11-2010 |
20100061493 | SYNCHRONIZATION CIRCUIT AND SYNCHRONIZATION METHOD, WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM - A synchronizing circuit comprising: a coarse synchronizing circuit which determines temporary reception timing using a preamble consisting of a repetition of known training signals added to a reception packet; a synchronization candidate timing control section which sets up multiple synchronization candidates based on the temporary reception timing and controls synchronization of received signal s in each of the multiple synchronization candidates; a signal quality monitoring section which monitors signal quality of the received signal s synchronized in each of the multiple synchronization candidates; and a synchronization candidate selecting section which selects one of the synchronization candidates as a final reception timing based on a monitoring result of the signal quality in the signal quality monitoring section. | 03-11-2010 |
20100067409 | COMMUNICATION SYSTEM, A COMMUNICATION METHOD, AND A COMMUNICATION APPARATUS - A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity. | 03-18-2010 |
20100067588 | Wireless Communication Apparatus, Antenna Calibration Method, and Computer Program - Reversibility in the directivity in the event of transmission/reception through a multi-antenna system is well suitably compensated for by executing self-calibration. A branch is set to a reference branch, and a forward loopback transfer function and a backward loopback transfer function are acquired, whereby per-branch calibration factors are calculated. Subsequently, an other branch is set to a reference branch, and calibration factors are calculated in a similar manner. Then, the calibration factor for the reference branch is corrected in accordance with the secondly obtained calibration factor so that a calibration condition is satisfied. | 03-18-2010 |
20100201493 | PHOTOELECTRIC CELL DEVICE AND MALFUNCTION DETERMINING METHOD - Provided is a photoelectric-cell device including a power-source unit arranged between a ground line and a power-source line for generating photo-electromotive force and applying state information to the power-source line, and also including an inverter for converting a direct-current power source into a predetermined one and communicating with the unit via the power-source line. A power-source module of the unit includes a photoelectric-cell module, a bypass diode, a state detector, a communication unit, and a communication controller. The photoelectric-cell module includes cells for generating photo-electromotive force, first/second terminals on the ground-line/power-source-line sides, respectively. The anode of the diode is connected to the first terminal, and the cathode to the second terminal. The detector detects a state of each power-source module. The communication unit applies the information to the power-source line. The controller controls the communication unit to apply the information selectively, based on an information request from the inverter. | 08-12-2010 |
20100208633 | COMMUNICATION DEVICE, COMMUNICATION METHOD AND COMMUNICATION SYSTEM - There is provided a communication device including a first communicating unit, a second communicating unit that has a plurality of antennas, a first communication processing unit that processes a signal received by the first communicating unit, allows the first communicating unit to transmit a signal, and a second communication processing unit that processes a signal received by the second communicating unit, allows the second communicating unit to transmit a signal. The second communication processing unit includes an adjusting unit that adjusts a signal to be transmitted from each of the plurality of antennas based on an adjustment factor, a transmission beam pattern candidate setting unit that derives at least one transmission beam pattern based on a first transmission request and a second transmission request, and a beam pattern applying unit that applies any of the set at least one transmission beam pattern candidate based on first requested-beam-pattern identification information. | 08-19-2010 |
20100210221 | COMMUNICATION DEVICE, COMMUNICATION CONTROL METHOD AND COMMUNICATION SYSTEM - There is provided a communication device including: a first radio communication unit capable of radio communication in accordance with a first communication method; and a second radio communication unit capable of radio communication in accordance with a second communication method using a higher frequency band than the first communication method, wherein the first radio communication unit transmits an instruction signal instructing to learn a beam directionality to another communication device, and the second radio communication unit transmits a beam reference signal used for learning a beam directionality to said another communication device after completion of transmission of the instruction signal by the first radio communication unit and before reception of a response signal to the instruction signal. | 08-19-2010 |
20110025543 | OPERATION TERMINAL, PROCESSING METHOD PERFORMED BY THE OPERATION TERMINAL, INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING SYSTEM, AND INFORMATION PROCESSING METHOD PERFORMED BY THE INFORMATION PROCESSING SYSTEM - There is provided an operation terminal including a mouse which has a spherical object, an electric power acquisition section which has a piezoelectric element and also converts energy generated by rotation of the spherical object by a force applied by a user into energy for striking the piezoelectric element, and a capacitor section which acquires and accumulates electric power generated by striking the piezoelectric element. | 02-03-2011 |
20110025921 | INFORMATION PROCESSING APPARATUS, OPERATION TERMINAL, INFORMATION PROCESSING SYSTEM, AND INFORMATION PROCESSING METHOD PERFORMED BY THE INFORMATION PROCESSING SYSTEM - There is provided an information processing apparatus including a reception section for receiving a trigger packet, which is a packet smaller than a command packet including a command for designating processing to be executed by the information processing apparatus, from an operation terminal via a wireless signal, a trigger packet acquisition section for acquiring the trigger packet from the wireless signal received by the reception section, an electric power-supply packet generation section for generating an electric power-supply packet for supplying electric power, when the trigger packet is acquired by the trigger packet acquisition section, and a transmission section for transmitting the electric power-supply packet generated by the electric power-supply packet generation section to the operation terminal via a wireless signal. | 02-03-2011 |
20110065379 | RELAY STATION DEVICE, BASE STATION DEVICE, MOBILE STATION DEVICE, AND RADIO COMMUNICATION SYSTEM - There is provided a relay station including a base station-relay station resource allocation request-transmission section which transmits a base station-relay station resource allocation request indicating that allocation of a base station-relay station resource is requested, the base station-relay station resource being a resource used by a radio signal transmitted/received between a base station and the relay station, to the base station using a radio signal, a base station-relay station resource allocation response-reception section which receives base station-relay station resource information indicating the base station-relay station resource from the base station using a radio signal, as a base station-relay station resource allocation response which is a response with respect to the base station-relay station resource allocation request, and a base station-relay station resource information storage section which stores the base station-relay station resource information received by the base station-relay station resource allocation response-reception section. | 03-17-2011 |
20110310883 | COMMUNICATION APPARATUS AND AUTOMATIC GAIN CONTROL - Provided is a communication apparatus including a first communication unit for performing communication using a carrier having a first frequency, a second communication unit having a plurality of antennas, for performing communication using a carrier having a second frequency, a first communication processing unit for processing a signal received by the first communication unit and causing to transmit a signal, and a second communication processing unit for processing a signal received by the second communication unit and causing to transmit a signal. The second communication processing unit includes a synchronization unit for specifying a start position of a second transmission request in which a plurality of transmission beam patterns are set in one packet based on information indicating reception initiation, and an automatic gain control unit for performing automatic gain control based on a first automatic gain control setting value. | 12-22-2011 |
20110317599 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - Provided is a wireless communication device and a wireless communication method which can maintain compatibility with a plurality of communication schemes and send a response signal back within the allowed time specified by each communication scheme. The wireless communication device includes a radio receiving unit ( | 12-29-2011 |
20120020420 | COMMUNICATION DEVICE AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - Suitable beam pattern control is performed while performing access control based on physical carrier sense. | 01-26-2012 |
20120028588 | Communication Apparatus and Communication Method, Computer Program, and Communication System - To appropriately effect a coordination with a plurality of communication parties that perform a millimeter wave communication. | 02-02-2012 |
20120044900 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - A learning on a weight of an adaptive array antenna which becomes necessary for a space division multiple access is carried out while a backward compatibility with a conventional standard is maintained. | 02-23-2012 |
20120044904 | COMMUNICATION DEVICE AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - A communication operation is suitably performed with application of Space Division Multiple Access in which wireless resources on a space axis are shared by a plurality of users. | 02-23-2012 |
20120082087 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, COMMUNICATION METHOD AND COMPUTER PROGRAM PRODUCT - A relay node (or relay station) operates as an intermediary entity in a transmission between a base station and a mobile station based on its position in a cell and the mobile station's position in the cell. Since the cell is divided into multiple regions and different wireless resources are used in the multiple regions, the relay node employs the relevant wireless resources to be used in the communications based on positions of the relay node and the mobile station. When the relay station and the mobile station are both in the boundary region, it is possible to avoid interference in the relay station by adapting a relay mode that uses a boundary frequency avoiding interference with adjacent cells for both an uplink and a downlink and demultiplexes a relay link and an access link in a time direction for each of the uplink and the downlink Similar adaptations are made when the mobile station and the relay station are in various positions within a center cell region and boundary cell region. | 04-05-2012 |
20120113888 | BASE STATION, COMMUNICATION SYSTEM, MOBILE TERMINAL, AND RELAY DEVICE - A base station is provided with a communication unit for communicating with a mobile terminal via a relay link between the base station and a relay device and an access link between the relay device and the mobile terminal, and a selection unit for selecting an allocation pattern of an uplink of the relay link, a downlink of the relay link, an uplink of the access link, and a downlink of the access link to frequency-time blocks from a plurality of allocation patterns that are different in delay occurring between the base station and the mobile terminal. | 05-10-2012 |
20120122392 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, COMPUTER PROGRAM, AND COMMUNICATION SYSTEM - The directivity of an antenna is efficiently trained between a transmitter and a receiver, and the training results are efficiently fed back from the receiver to the transmitter. | 05-17-2012 |
20120140702 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, COMMUNICATION METHOD AND COMPUTER PROGRAM - By deciding positions of frequencies used via a relay station by a system in advance for assignment of boundary frequencies, frequencies of a central frequency more likely to be affected by the relay station are also mapped by avoiding a signal thereof. Alternatively, an adjacent cell whose central frequency is affected changes depending on a position of the relay station and thus, locations set to be highly likely to interfere with the central frequency of the adjacent cell is reduced by setting a region of the boundary frequencies permitted to the relay station in accordance with the position of the relay station. | 06-07-2012 |
20120163302 | COMMUNICATION SYSTEM, A COMMUNICATION METHOD, AND A COMMUNICATION APPARATUS - A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity. | 06-28-2012 |
20120176927 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, COMMUNICATION METHOD AND COMPUTER PROGRAM PRODUCT - A relay node (or relay station) assists in providing asymmetric communications with a mobile station. When resources are less than ideal for providing a direct uplink or downlink with the mobile station to a first base station, the relay station is employed to provide an uplink or downlink to a second base station. The mobile station may still maintain a direct downlink/uplink to the first base station when adequate resources are present. To assist in resource coordination the first and second base stations share scheduling information for the mobile station. This approach allows a second base station to server as a surrogate base station for a first base station, when inadequate resources are available for a direct uplink or downlink to the mobile station. The relay node makes it possible for the mobile station to maintain the uplink (or downlink) with the second base station, while remaining assigned to the first base station. | 07-12-2012 |
20120202501 | METHOD FOR PERFORMING HANDOVER, USER EQUIPMENT, BASE STATION, AND RADIO COMMUNICATION SYSTEM - Provided is a method for performing a handover from a first base station to a second base station by a user equipment that is performing a radio communication over a communication channel formed by aggregating a plurality of component carriers. The method includes a step of transmitting a handover command for a component carrier for which a handover has been approved by the second base station among the plurality of component carriers from the first base station to the user equipment and a step of trying to make an access from the user equipment to the second base station for each component carrier in response to the handover command. | 08-09-2012 |
20120287911 | BASE STATION, USER EQUIPMENT, COMMUNICATION CONTROL METHOD, AND RADIO COMMUNICATION SYSTEM - A base station includes a radio communication unit that establishes | 11-15-2012 |
20120302281 | BASE STATION, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - Provided is a base station including a plurality of branches, a storage unit that stores a calibration coefficient of each of the plurality of branches for each combination of other base stations, and a multiplying unit that multiplies a transmission signal from each of the plurality of branches by a calibration coefficient corresponding to a combination of one or more other base stations when CoMP transmission with the one or more other base stations is performed through the plurality of branches. | 11-29-2012 |
20120315891 | BASE STATION, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - Provided is a base station including a plurality of branches that perform CoMP transmission with another base station, a multiplying unit that multiplies a transmission signal from each of the plurality of branches by a calibration coefficient of each of the plurality of branches, wherein the calibration coefficient is a coefficient obtained by adjusting an individual calibration coefficient acquired by branch calibration between the plurality of branches in the base station based on a branch calibration result between a branch of the base station and a branch of the other base station. | 12-13-2012 |
20130017776 | RELAY STATION AND COMMUNICATION CONTROL METHODAANM Takano; HiroakiAACI SaitamaAACO JPAAGP Takano; Hiroaki Saitama JPAANM Sawai; RyoAACI TokyoAACO JPAAGP Sawai; Ryo Tokyo JPAANM Guo; XinAACI BeijingAACO CNAAGP Guo; Xin Beijing CN - Provided is a relay station relaying wireless signals between a base station and a mobile station, the relay station including: a communication unit configured to relay the wireless signals; a determination unit configured to determine whether or not it is necessary to change a cell ID of the relay station in order to avoid a collision between a cell ID of the relay station and a cell ID of the base station due to a movement of the relay station; and a control unit configured to cause a cell ID of an access point of the mobile station belonging to the relay station to be changed from a first cell ID of the relay station to a second cell ID of the relay station when the determination unit determines that it is necessary to change the cell ID. | 01-17-2013 |
20130034079 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - Provided is a wireless communication device including, in a resource block assigned from among a plurality of resource blocks arranged in a grid pattern on a time axis and a frequency axis, a wireless communication unit for not performing transmission in a non-transmission region and for performing transmission in another region in the source block, the non-transmission region being set at a boundary with an adjacent resource block in a time direction or a frequency direction. | 02-07-2013 |
20130039253 | BASE STATION, WIRELESS COMMUNICATION METHOD, USER EQUIPMENT, AND WIRELESS COMMUNICATION SYSTEM - There is provided a base station including a communication unit for communicating with a user equipment according to a frame format where subframes for uplink and subframes for downlink are structured in a time division manner, and a scheduler for moving a boundary between a subframe for downlink and a subframe for uplink. The communication unit wirelessly communicates with another base station by using a subframe between the boundary before movement by the scheduler and the boundary after the movement. | 02-14-2013 |
20130065540 | COMMUNICATION DEVICE, COMMUNICATION CONTROL METHOD AND COMMUNICATION SYSTEM - There is provided a communication device including: a first radio communication unit capable of radio communication in accordance with a first communication method; and a second radio communication unit capable of radio communication in accordance with a second communication method using a higher frequency band than the first communication method, wherein the first radio communication unit transmits an instruction signal instructing to learn a beam directionality to another communication device, and the second radio communication unit transmits a beam reference signal used for learning a beam directionality to said another communication device after completion of transmission of the instruction signal by the first radio communication unit and before reception of a response signal to the instruction signal. | 03-14-2013 |
20130084845 | COMMUNICATION DEVICE, AND COMMUNICATION METHOD AS WELL AS COMMUNICATION SYSTEM - A terminal intermittently operates while receiving paging information and other necessary information from a base station. In the terminal cycles of DRX with different lengths are combined in a hierarchy manner to determine an intermittent operation period. Upper DRX in the hierarchy has a longer cycle than lower DRX. A period using a cycle of the immediately lower DRX is determined based on information on the cycle of the upper DRX. An intermittent operation of a communication processing unit is controlled based on information on the cycle of DRX in a period using information on a cycle of the lowermost DRX. | 04-04-2013 |
20130089059 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD, AND PROGRAM - There is provided a wireless communication device including a communication unit that transmits a reference signal, a first multiplication unit that performs multiplication of first transmission weight that is determined based on reception of the reference signal by a communication partner, and a second multiplication unit that performs multiplication of second transmission weight that is determined based on reception of the reference signal by the communication partner. The communication unit transmits a reference signal with weight that is obtained by multiplying the reference signal by the first transmission weight after determination of the first transmission weight. | 04-11-2013 |
20130130628 | WIRELESS COMMUNICATION DEVICE, BASE STATION, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - Provided is a wireless communication device including a receiving unit for receiving information based on measurement of radio conditions transmitted from a base station in association with identification information; and a control unit for controlling communication by using the information received by the receiving unit when the wireless communication device corresponds to the identification information received by the receiving unit. | 05-23-2013 |
20130148616 | BASE STATION, METHOD FOR RADIO COMMUNICATION, PROGRAM, RADIO COMMUNICATION SYSTEM, AND RADIO TERMINAL - Provided is a base station including a transmitter section that transmits a radio signal in a frame including a control region and a data region, a control signal generating section that generates a control signal which includes reference information identified by a group identifier assigned to a plurality of radio terminals and which is transmitted in the control region, and a data signal generating section that generates a data signal by disposing information for the plurality of radio terminals in a reference region indicated by the reference information in the data region. | 06-13-2013 |
20130150109 | BASE STATION, METHOD FOR RADIO COMMUNICATION, PROGRAM, RADIO COMMUNICATION SYSTEM, AND RADIO TERMINAL - Provided is a base station including a control signal generating section that generates a control signal which includes resource information identified by a group identifier assigned to a plurality of radio terminals, and a transmitter section that transmits the control signal generated by the control signal generating section. | 06-13-2013 |
20130155864 | WIRELESS TERMINAL, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - There is provided a wireless terminal including a storage section that stores information on a plurality of wireless terminals forming a group in which the wireless terminal operates as a representative wireless terminal, a communication control section that controls random access to a base station before another wireless terminal in the group, and a transmitting section that transmits the information on the plurality of wireless terminals stored in the storage section to the base station. | 06-20-2013 |
20130155994 | BASE STATION, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - There is provided a base station including a receiving section that receives information on a plurality of wireless terminals from a representative wireless terminal representing the plurality of wireless terminals, a control information setting section that sets control information for controlling random access by the plurality of wireless terminals based on the information on the plurality of wireless terminals received by the receiving section, and a transmitting section that transmits the control information set by the control information setting section to the plurality of wireless terminals. | 06-20-2013 |
20130201920 | GATEWAY APPARATUS AND COMMUNICATION METHOD - Provided is a gateway apparatus including a first communication unit that communicates with a base station in a first communication method, a second communication unit that communicates with a communication apparatus in a second communication method, an identification information holding unit that holds a correspondence between first identification information in the first communication method and second identification information in the second communication method of the communication apparatus, and a category information holding unit to share category information showing a characteristic of the communication apparatus with the communication apparatus. The first communication unit performs communication of the communication apparatus in accordance with the category information with the base station by using the first identification information of the communication apparatus. | 08-08-2013 |
20130203455 | COMMUNICATION SYSTEM AND COMMUNICATION APPARATUS - Provided is a communication system including a base station, a communication apparatus, and a gateway apparatus including a first communication unit that communicates with the base station in a first communication method, a second communication unit that communicates with the communication apparatus in a second communication method, an identification information holding unit that holds a correspondence between first identification information in the first communication method and second identification information in the second communication method of the communication apparatus, and a category information holding unit to share category information showing a characteristic of the communication apparatus with the communication apparatus. The first communication unit performs communication of the communication apparatus in accordance with the category information with the base station by using the first identification information of the communication apparatus. | 08-08-2013 |
20130279457 | TERMINAL APPARATUS, FEEDBACK CONTROL METHOD, BASE STATION, PAIRING CONTROL METHOD, PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - Provided is a terminal apparatus including an estimation unit that estimates a channel to a base station by using a reference signal transmitted from the base station, a selection unit that selects a transmission weight desirable for second down-link transmission from the base station to another terminal apparatus spatially multiplexed with first down-link transmission on the channel from a plurality of transmission weight candidates in accordance with an estimation result by the estimation unit, and a feedback controller that controls feedback of the transmission weight selected by the selection unit to the base station. | 10-24-2013 |
20130288720 | RADIO COMMUNICATION DEVICE, BASE STATION, METHOD FOR RADIO COMMUNICATION, PROGRAM AND RADIO COMMUNICATION SYSTEM - Provided is a radio communication device including a radio communication section that communicates by radio with a base station that changes a cycle for sending a paging channel to a second cycle in a case where no response is made from the radio communication device responsive to the paging channel sent in accordance with a first cycle, a detecting section that detects a state change of the radio communication device, and a receipt control section that switches a receiving cycle for receiving the paging channel from the first cycle to the second cycle according to a detection result obtained by the detecting section. | 10-31-2013 |
20130301601 | TERMINAL APPARATUS, FEEDBACK CONTROL METHOD, BASE STATION, PAIRING CONTROL METHOD, PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - Provided is a terminal apparatus including an estimation unit that estimates a channel to a base station by using a reference signal transmitted from the base station, a selection unit that selects a transmission weight desirable for down-link transmission on the channel from a plurality of transmission weight candidates in accordance with an estimation result by the estimation unit, and a feedback controller that controls feedback of the transmission weight selected by the selection unit to the base station. When the selection unit selects two transmission weights or more, the feedback controller feeds back the selected two transmission weights or more to the base station. | 11-14-2013 |
20130316745 | RADIO COMMUNICATION DEVICE, BASE STATION, METHOD FOR RADIO COMMUNICATION, PROGRAM, AND RADIO COMMUNICATION SYSTEM - Provided is a radio communication device including a radio communication section that communicates by radio with a base station, a storage section that stores information indicating two or more intervals, and a receipt control section that switches, among the two or more intervals, a receiving cycle for receiving a paging channel sent from the base station in an unconnected state with the base station. | 11-28-2013 |
20140016632 | COMMUNICATION APPARATUS AND AUTOMATIC GAIN CONTROL METHOD - Provided is a communication apparatus including a first communication unit for performing communication using a carrier having a first frequency, a second communication unit having a plurality of antennas, for performing communication using a carrier having a second frequency, a first communication processing unit for processing a signal received by the first communication unit and causing to transmit a signal, and a second communication processing unit for processing a signal received by the second communication unit and causing to transmit a signal. The second communication processing unit includes a synchronization unit for specifying a start position of a second transmission request in which a plurality of transmission beam patterns are set in one packet based on information indicating reception initiation, and an automatic gain control unit for performing automatic gain control based on a first automatic gain control setting value. | 01-16-2014 |
20140050131 | WIRELESS RESOURCE ALLOCATION METHOD AND WIRELESS RESOURCE ALLOCATION DEVICE, AND COMMUNICATION SYSTEM - Inter-cell interference is avoided in a cellular system operated in a TDD scheme. An order of a plurality of configurations are rearranged in the ascending order of the number of downlink sub frames and in the descending order of the number of uplink sub frames, and configurations are switched between neighboring cells according to the rearranged order when different configurations are used in the neighboring cells. Further, an order of at least some configurations is further rearranged so that interference between adjacent configurations is reduced while maintaining the ascending order of the number of downlink sub frames. | 02-20-2014 |
20140050177 | WIRELESS RESOURCE ALLOCATION METHOD, WIRELESS RESOURCE ALLOCATION DEVICE, AND COMMUNICATION SYSTEM - An allocation of wireless resources is performed to avoid interference caused as an uplink and a downlink are mismatched between neighboring cells. When interference at a base station is desired to be reduced, in each portion causing interference at a base station side, an ABS is applied to any one of downlink and uplink sub frames. When interference at a terminal is desired to be reduced, in each portion causing interference at a terminal side, transmission or reception of a terminal is stopped. When both interference at a base station side and interference at a terminal side are desired to be reduced, basically, it is desirable to stop the same portion as when interference between base stations is reduced. | 02-20-2014 |
20140056263 | COMMUNICATION DEVICE, COMMUNICATION CONTROL METHOD AND COMMUNICATION SYSTEM - There is provided a communication device including: a first radio communication unit capable of radio communication in accordance with a first communication method; and a second radio communication unit capable of radio communication in accordance with a second communication method using a higher frequency band than the first communication method, wherein the first radio communication unit transmits an instruction signal instructing to learn a beam directionality to another communication device, and the second radio communication unit transmits a beam reference signal used for learning a beam directionality to said another communication device after completion of transmission of the instruction signal by the first radio communication unit and before reception of a response signal to the instruction signal. | 02-27-2014 |
20140087720 | COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, AND PROGRAM - Provided is a communication control device including a setting unit configured to set a timing at which a predetermined signal is transmitted only from one of a plurality of base stations having an identical cell ID, and a determining unit configured to, based on a reception result of a communication device at the timing, determine a combination of base stations from the plurality of base stations, the combination of the base stations being used for transmitting a signal to the communication device. | 03-27-2014 |
20140092859 | COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND BASE STATION - A communication device, method, and system generate wireless communication signals that include a subframe within a radio frame. The subframe includes an extension control area in a data area of the subframe. The extension control area is set according to a periodic mapping pattern. | 04-03-2014 |
20140094169 | COMMUNICATION DEVICE AND COMMUNICATION METHOD - A communication device and method provide a way for multiple transmitting base stations that share a same cell ID to transmit a predetermined signal to a user equipment that allows the user equipment to subsequently communicate with the most effective subset of said multiple transmitting base stations for that particular user equipment. The user equipment receives the predetermined signal from all of the base stations, and then provides feedback regarding the quality of signal reception. Based on the feedback, a message format is created that informs the user equipment which base stations are included in a subset of base stations that will be used to communicate with the user equipment. | 04-03-2014 |
20140112292 | COMMUNICATION SYSTEM, A COMMUNICATION METHOD, AND A COMMUNICATION APPARATUS WITH CLEAR TO SEND SIGNAL FRAME - A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity. | 04-24-2014 |
20140119258 | COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND BASE STATION - A communication device, system and method cooperate to transmit a signal from a base station, where the signal includes a current frame and a target frame. A counting unit counts a frame period and a reception control unit causes the receiving unit to transition to a sleep state. A reception control unit causes the receiving unit to return from the sleep state before a counting result of the counting unit reaches the target frame. The reception control unit also causes the receiving unit to return to the sleep state over a time period based on a difference between a current frame and the target frame. | 05-01-2014 |
20140119349 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD, AND RADIO COMMUNICATION SYSTEM - The invention operates as a base station and preferably suppresses interference between cells in a downlink to a terminal in a range expansion area, under a radio communication environment in which cells in different sizes are layered. PDCCH parts which are respectively used by a Macro eNodeB and a Pico eNodeB are separated by a search space so that all information in the PDCCH can be protected from losing due to interference. Since a user equipment can maintain a control signal in the PDSCH part, a signal in the PDSCH can be output from an eNodeB and this improves the throughput. | 05-01-2014 |
20140301349 | BASE STATION, COMMUNICATION METHOD AND PROGRAM - Some aspects of the present disclosure relate to a base station, a communication method, and a program for supporting a multiple_ABS feature of the 3rd Generation Partnership Project (3GPP). In some embodiments, an interference protection status of a communication frame is determined, based at least in part on configurations of base stations. The configurations may indicate patterns of one of more frames of a first type. The first type of frame may be an Absolute Blank Subframe type. Some of the configurations may differ, at least in part. In some embodiments, the interference protection status of a frame may be determined to be a protected status, an unprotected status, or a partially protected status. | 10-09-2014 |
20140307685 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD, AND RADIO COMMUNICATION SYSTEM - Provided is a radio communication device including an information acquisition unit configured to acquire information of a frequency position at which predetermined indispensable information is allocated in a data area of a downlink subframe transmitted by an adjacent base station, and a virtual carrier transmission control unit configured to transmit a virtual carrier in a data area of a downlink subframe of a current cell in a manner that the virtual carrier does not overlap with the frequency position at which the predetermined indispensable information is allocated, the virtual carrier having a narrower band than a donor band. | 10-16-2014 |
20140328307 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD, AND RADIO COMMUNICATION SYSTEM - In a radio communication, a UE terminal uses a CSI-RS as a reference signal for point selection only in the case of a scenario 4, and uses a CRS as a reference signal for point selection in the cases of scenarios 1 to 3 other than the scenario 4. Through RRC signaling, an eNodeB notifies the UE terminal of the fact that the measurement of a specific cell ID will be performed using a CSI-RS, that is, a cell ID using a CSI-RS as a reference signal for point selection. The operations suppress overhead of reference signals and improve a point selection update frequency. | 11-06-2014 |
20140341058 | COMMUNICATION CONTROL DEVICE, COMMUNICATION METHOD, COMMUNICATION TERMINAL AND PROGRAM - Components and operations of a wireless communication system are disclosed. Components of a wireless communication system may include a base station, a communication control device, and a terminal device. The base station may send configuration information to the communication control device, and the communication control device may send the configuration information to the terminal device. The configuration information may indicate a first protection status associated with frames. The terminal device may obtain measurement results indicating signal quality associated with one or more of the frames. The terminal device may send measurement information to the communication control device. The measurement information may depend on the measurement results. The communication control device may determine, based at least in part on the measurement information, whether to associate one or more of the frames with a second protection status. | 11-20-2014 |
20140376449 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, COMMUNICATION METHOD AND COMPUTER PROGRAM - By deciding positions of frequencies used via a relay station by a system in advance for assignment of boundary frequencies, frequencies of a central frequency more likely to be affected by the relay station are also mapped by avoiding a signal thereof. Alternatively, an adjacent cell whose central frequency is affected changes depending on a position of the relay station and thus, locations set to be highly likely to interfere with the central frequency of the adjacent cell is reduced by setting a region of the boundary frequencies permitted to the relay station in accordance with the position of the relay station. | 12-25-2014 |
20150043375 | BASE STATION, USER EQUIPMENT, COMMUNICATION CONTROL METHOD, AND RADIO COMMUNICATION SYSTEM - A base station includes a radio communication unit that establishes communication with a mobile communication terminal using a plurality of component carriers. The base station further includes a determination unit that determines a handover factor. The base station also includes a control unit allocates to the mobile communication terminal a measurement time interval for at least one component carrier from the plurality of component carriers according to the handover factor. A channel quality of the at least one component carrier of another base station is measured during the measurement time interval. | 02-12-2015 |