| Patent application number | Description | Published |
|---|
| 20080207133 | Method of controlling beam weight detection and receiver - A receiver in a wireless communication system including a transmitter that multiplies a plurality of transmission signals with a plurality of beam weights to transmit the transmission signal through a plurality of antennas. Also included is a receiver that receives the transmission signals, detects a specific beam weight of which reception state is a specific state among a plurality of to-be-detected beam weights, and notifies the transmitter of the detection of the specific beam weight. The receiver preferably includes a monitoring unit that monitors a state of variation in the beam weight by performing a statistics process on history of previously-detected beam weights. Also included is a control unit that controls the number of the-to-be-detected beam weights or a detection timing of the specific beam weight according to a monitoring result. | 08-28-2008 |
| 20090111477 | UPLINK COMMUNICATION METHOD IN A RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION SYSTEM, RADIO TERMINAL AND RADIO BASE STATION - A radio communication system including a radio base station and radio terminals communicating with the radio base station, wherein the system further includes a unit for allocating a first frequency resource which is shared by the radio terminals and which is used when each of the radio terminals transmits a first signal to the radio base station in periodic transmission timing. Also included is a unit for allocating a second frequency resource which is used when each of the radio terminals transmits a second signal to the radio base station. Also included is a unit for controlling the second frequency resource when each of the radio terminals transmits the second signal in transmission timing of the first signal, so that the second frequency resource is changed to a third frequency resource which is smaller than the allocated second frequency resource so as not to overlap the first frequency resource. | 04-30-2009 |
| 20090196272 | MOBILE STATION, BASE STATION AND RADIO COMMUNICATION METHOD - A mobile station that receives multibeam data in preceding Multiple Input Multiple Output (MIMO) from a base station, using a plurality of antennas, includes: a code book that includes contents identical to contents of a code book installed in the base station and that includes information of beam selection for preceding; and a control unit that determines a weight for carrying out optimum beam selection for preceding at time of searching information in the code book, based on a state of a beam in each resource block of received data that is divided into a plurality of resource blocks in a radio communication band, to transmit the weight as feedback information to the base station. | 08-06-2009 |
| 20100046667 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATING METHOD - A wireless communication apparatus of a base station uses antennas for multiple systems, forms a multi-beam, transmits data to a mobile station, and includes a code book configured to store therein beamforming information; a pre-coder that reads the code book and executes a process of forming a given beam for the data; a control unit that, based on feedback information to correct variations in phase occurring at transmitting circuits respectively corresponding to each of the systems, performs control such that the beamforming information to correct the variations in phase is read from the code book; and a phase correcting unit that corrects a phase of the multi-beam formed by the pre-coder, based on the feedback information and such that relations among the phases of the multi-beam become substantially linear. | 02-25-2010 |
| 20100167768 | RADIO RELAY STATION APPARATUS AND RADIO RELAY METHOD - Relaying a radio signal in a radio relay station apparatus that relays the radio signal between a base station apparatus and a mobile station apparatus, including storing an identifier of the mobile station apparatus, specifying a radio resource assigned to the mobile station apparatus, which is a radio resource in which a radio signal that should be amplified is transmitted, the radio resource assigned to the mobile station apparatus being indicated by control channel information sent from the base station apparatus, and receiving the radio signal between the base station apparatus and the mobile station apparatus. Further including amplifying the received signal, the received signal being transmitted on the specified radio resource, and sending the amplified signal in a form of the radio signal. | 07-01-2010 |
| 20100248751 | RELAY METHOD AND RELAY STATION - A relay station that relays radio signals between a base transceiver station and a mobile station includes a downlink amplifier that amplifies a downlink signal from the base transceiver station to the mobile station, an uplink amplifier that amplifies an uplink signal from the mobile station to the base transceiver station, a paging response signal detection unit that detects a paging response signal with which the mobile station responds to a paging signal for paging the mobile station, and an amplification control unit that starts amplification control with respect to the downlink amplifier and the uplink amplifier when the paging response signal has been detected by the paging response signal detection unit. | 09-30-2010 |
| 20100303000 | WIRELESS RELAY DEVICE, WIRELESS RELAY METHOD, AND WIRELESS COMMUNICATION SYSTEM - A wireless relay device that transmits a reception signal from a transmission device to a reception device includes a determination section configured to determine whether or not the reception signal is a retransmission signal retransmitted from the transmission device, and an amplification section configured to amplify the reception signal when the determination section determines that the reception signal is the retransmission signal, and not to amplify the reception signal when the determination section determines that the reception signal is not the retransmission signal. | 12-02-2010 |
| 20110158294 | WIRELESS RELAY APPARATUS AND WIRELESS RELAY METHOD - A wireless relay apparatus relaying wireless communication between a transmission station and a receiving station includes M (M is an integer >1) receiving antennas receiving a radio signal from the transmission station, a signal processing section performing orthogonal transformation and phase rotation on M received signals received by each of the receiving antennas as an input signal so as to obtain M output signals having a same average power level, and M transmission antennas individually transmitting the M output signals obtained by the signal processing section to the receiving station. | 06-30-2011 |
