Patent application number | Description | Published |
20130058296 | METHOD FOR WIRELESS COMMUNICATION, WIRELESS STATION, MOBILE TERMINAL, AND WIRELESS COMMUNICATION SYSTEM - There is a provided a wireless communication system in which multiple base station transmit the same data (PDSCH signal) in a coordinated transmission scheme. Each base station controls allocation a wireless resource that one of the remaining base station transmits a signal different from the above same data, such as a control signal or reference signal to a mobile station that is applied the coordinated transmission scheme to a mobile terminal that is different from the mobile station that is applied the coordinated transmission scheme and that is to communicate with the base station. | 03-07-2013 |
20130259022 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION AND WIRELESS COMMUNICATION METHOD - It is an object of the invention to provide a wireless communication system capable of decoding a downlink shared channel of an interfering cell while achieving the reduction of intercell interference to a downlink control channel of an interfered cell. In a wireless communication system that controls transmission timing of each base station so that a control channel transmitted by a first base station and a shared channel transmitted by a second base station temporally overlap, the second base station includes a muting control unit and a muting processing unit that transmit a null symbol in an overlapping time interval of the shared channel with a time interval of the control channel on the basis of the number of code blocks in a data signal component for each mobile station corresponding to the overlapping time interval of the shared channel with the time interval of the control channel. | 10-03-2013 |
20130303178 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION, AND WIRELESS COMMUNICATION METHOD - A wireless communication system controls a transmission timing in each cell so that a control channel of a first cell and a data channel of a second cell temporally overlap each other. The wireless communication system includes a base station of the first cell. The base station of the first cell includes a first control unit and a first communicating unit. The first control unit notifies a base station of the second cell information used to specify a resource of the control channel of the first cell. The first control unit sets a resource of the control channel of the first cell. The first communicating unit notifies the mobile station of the first cell of information for decoding the first resource and transmits a control signal to the mobile station of the first cell by using the first resource. | 11-14-2013 |
20130303179 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, MOBILE STATION, AND WIRELESS COMMUNICATION METHOD - A wireless communication system controls a transmission timing in each cell so that a control channel of a first cell and a data channel of a second cell temporally overlap each other. The wireless communication system includes a base station of the first cell. The base station of the first cell includes a first control unit and a first communicating unit. The first control unit notifies a base station of the second cell of information used to specify a resource of the control channel of the first cell. The first communicating unit transmits a control signal to a mobile station of the first cell by using a first resource of the control channel of the first cell. | 11-14-2013 |
20140204921 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, AND MOBILE STATION - A wireless communication system includes a base station ( | 07-24-2014 |
20140211717 | WIRELESS COMMUNICATION SYSTEM, BASE STATION, AND MOBILE STATION - A wireless communication system | 07-31-2014 |
20140362802 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TERMINAL, WIRELESS BASE STATION, AND WIRELESS COMMUNICATION METHOD - A wireless communication system including: a first wireless base station configured to perform joint transmission with at least a second wireless base station, the joint transmission being transmission for transmitting identical data to a wireless terminal using at least one frequency domain in synchronization with the at least a second wireless base station, and the wireless terminal configured to transmit feedback information to the first wireless base station, the feedback information relating to a reception quality for each of the at least one frequency domain of the performed joint transmission. | 12-11-2014 |
Patent application number | Description | Published |
20090016461 | BASE STATION AND MIMO-OFDM COMMUNICATION METHOD THEREOF - When performing communication with a mobile station using MIMO-OFDM communication, a base station uses multiple input multiple output (MIMO) communication, which is multiple data stream transmission, to transmit data and pilot signals in a case where the communication environment of the mobile station is good, or uses single input multiple output (SIMO) communication, which is single data stream transmission, in a case where the communication environment of the mobile station is poor. When performing that SIMO communication, the base station performs control so that pilot signals from a specified cell that are used in channel estimation in single data stream transmission and pilot signals from adjacent cells that are used in channel estimation in single data stream transmission do not overlap in the frequency direction and/or time axis direction. | 01-15-2009 |
20130251059 | BASE STATION AND MIMO-OFDM COMMUNICATION METHOD THEREOF - When performing communication with a mobile station using MIMO-OFDM communication, a base station uses multiple input multiple output (MIMO) communication, which is multiple data stream transmission, to transmit data and pilot signals in a case where the communication environment of the mobile station is good, or uses single input multiple output (SIMO) communication, which is single data stream transmission, in a case where the communication environment of the mobile station is poor. When performing that SIMO communication, the base station performs control so that pilot signals from a specified cell that are used in channel estimation in single data stream transmission and pilot signals from adjacent cells that are used in channel estimation in single data stream transmission do not overlap in the frequency direction and/or time axis direction. | 09-26-2013 |
Patent application number | Description | Published |
20090103645 | DIGITAL MOBILE COMMUNICATION SYSTEM AND TRANSMISSION/RECEPTION METHOD THEREOF - A radio communication system in which a transmission station performs window function processing on a transmission symbol to which cyclic prefixes have been attached for each specified number of samples, then transmits the signal, and a receiving station extracts and demodulates effective signal portions from the received signal, wherein the transmission station uses a control channel to notify the receiving station of window width N | 04-23-2009 |
20090175374 | Multiple-Input Multiple-Output Transmission System - In a multiple-input multiple-output transmission system (MIMO system), a receive station detects whether or not there is an error in each data stream, estimates the state of the propagation path of each transmit antenna and reports, to the transmitting side, re-transmission necessary/unnecessary information, for every data stream, created based upon whether or not there is an error, and the state of the propagation path of each transmit antenna. A transmit station decides a transmit antenna that transmits a data stream requiring re-transmission, based upon the reported state of the propagation path of each transmit antenna, and re-transmits the data stream requiring re-transmission from the transmit antenna decided. | 07-09-2009 |
20110013585 | PILOT SIGNAL TRANSMISSION METHOD AND MOBILE COMMUNICATION SYSTEM - A method of transmitting pilot signals for channel compensation in a mobile communication system is disclosed. In the disclosed method, a first pilot signal and a second pilot signal are time-division multiplexed together with a data signal of a user into a time-division multiplexed signal which data signal is assigned a certain bandwidth; the time-division multiplexed signal is frequency-division multiplexed together with time division multiplexed signals of other users when wirelessly transmitted; and the first pilot signal is assigned a bandwidth larger than the bandwidth of the data signal and the second pilot signal is assigned a bandwidth smaller than the bandwidth of the data signal. | 01-20-2011 |
20110078530 | TRANSMITTING APPARATUS, RECEIVING APPARATUS AND INFORMATION COMMUNICATION METHOD - A wireless communication system in which retransmission is performed between a transmitting apparatus and a receiving apparatus, whereby the transmitting apparatus includes, a first transmitting unit to transmit first data to the receiving apparatus and retransmission controlling unit to perform transmission of second data, the data part of which is same as that of the first data, without waiting for a feedback signal from receiving apparatus regarding the first data, and to wait for a feedback signal from the receiving apparatus regarding the second data, and the receiving apparatus includes, a second transmitting unit to transmit the feedback signal regarding the second data to the transmitting apparatus. | 03-31-2011 |
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 | |
20110281605 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - The present invention relates to a wireless communication device performing communications by using a radio frame containing a control channel and a data channel, the wireless communication device comprises of a structuring unit that allocates a first part of the control channel adjacent to the data channel in the radio frame, and allocates a second part of the control channel, which denotes different control information from the first part, to the data channel so as to be inserted between data of the data channel and a transmission unit that transmits the radio frame including the data channel and the control channel. | 11-17-2011 |
20120045986 | WIRELESS COMMUNICATION SYSTEM, RELAY STATION, RECEIVER STATION, AND WIRELESS COMMUNICATION METHOD - A relay station that includes a receiver that receives, from a transmitter station, a signal in which known data used for propagation path estimation is assigned to a first region determined by a combination of a frequency domain and a time domain and predetermined data is assigned to a second region that is different from the first region. The relay station also includes a processor that performs processing for generating a signal in which the known data is assigned to the second region in the signal received by the receiver, and a transmitter that transmits the signal generated by the processor. | 02-23-2012 |
20120046043 | WIRELESS COMMUNICATION SYSTEM, RECEIVER STATION, AND WIRELESS COMMUNICATION METHOD - A wireless communication system includes a transmitter station and a receiver station capable of performing wireless communication via a relay station. The relay station includes a receiver that receives the signals transmitted by the transmitter station. The relay station also includes a signal processor that performs predetermined signal processing on the signals received by the receiver, and eliminates the later one of two same signals received by the receiver. The relay station further includes a transmitter that transmits the earlier one of the two same signals to the receiver station after the signal processing performed by the signal processor. | 02-23-2012 |
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 |
20130182646 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - A wireless communication system including a transmitting and receiving device that performs communications with the transmitting device, using a radio frame containing control information and data, wherein the transmitting device includes: a first generating unit that generates first control information able to be estimated by the receiving device; a second generating unit that generates second control information used for control of communication from the receiving device to the transmitting device and unable to be estimated by the receiving device; a multiplexing unit that multiplexes the control and data information so that the first control information is allocated in the control information and the second control information is allocated in the data in the radio frame; a transmitting unit a signal multiplexed by the multiplexing unit; the receiving device includes a receiving unit that receives the signal wherein the second control information is allocated in the data from the transmitting device. | 07-18-2013 |
Patent application number | Description | Published |
20110061067 | DISC DRIVE APPARATUS AND ELECTRONIC APPARATUS - A disc drive apparatus includes: an outer casing; a disc drive unit that includes a disc table on which a disc-like recording medium is mounted, a spindle motor, an optical pickup, and a pickup base; a slider that includes a main body and a rack gear, is movable in a first direction as an insertion direction and a second direction as an ejection direction, and moves in the second direction during loading and moved in the first direction during ejection; a drive motor functioning as a drive source of the slider; a deceleration gear group that intermeshes with the rack gear; an eject lever that is rotated to press the recording medium during the ejection; and a link member coupled with the eject lever, the slider including a lock plate and a slide plate. | 03-10-2011 |
20140301809 | RECORDING MEDIUM DELIVERY MECHANISM AND RECORDING MEDIUM CHANGER - The recording medium delivery mechanism includes a slider, a holding lever, a biasing portion, a lever-opening operation portion, and a housing and discharging drive unit. The slider is supported on a chassis to be movable in housing and discharging directions of a recording medium. The holding lever is rotatably supported by the slider and configured to hold the recording medium. The biasing portion is configured to bias the holding lever toward the recording medium. The lever-opening operation portion is provided to the holding lever, is engaged with a lever engagement portion provided to the chassis by a movement of the slider in the discharging direction of the recording medium, and configured to rotate the holding lever in a direction away from the recording medium. The housing and discharging drive unit is configured to move the chassis and the slider in the housing and discharging directions of the recording medium. | 10-09-2014 |