| Patent application number | Description | Published |
|---|
| 20080267312 | MULTICARRIER COMMUNICATION APPARATUS AND PEAK SUPPRESSING METHOD FOR THE SAME - A multicarrier communication apparatus includes: a scheduler operable to schedule transmission opportunities of the plurality of series of transmission data in accordance with predetermined scheduling information; a peak evaluator to evaluate whether or not the peak of the multicarrier signal exceeds a predetermined threshold value; and a peak suppressing unit operable to halt transmission of at least some of the plurality of series of transmission data based on the scheduling information upon decision by said peak evaluator that the result of the evaluation exceeds the threshold value. This construction makes it possible to accomplish peak suppression with ease without increasing the arithmetic scale, like in the previous art, while maintaining communication of users high in scheduling precedence. | 10-30-2008 |
| 20090190561 | BASE STATION DEVICE AND WIRELESS COMMUNICATION METHOD - A base station device and a mobile terminal for improving frequency-utilization efficiency to realize high-speed communication. The base station device forming a cell and performing radio communication with the mobile terminal being present in the cell includes determining unit configured to determine the application of adaptive demodulation and coding only to the radio communication with the mobile terminal present in a part of a predetermined area in the cell and an estimating unit configured to estimate channel state information on the basis of the pilot signal from the mobile terminal, wherein the determining unit determines whether or not the adaptive demodulation and coding is applied to the radio communication with the mobile terminal on the basis of the channel state information estimated by the estimating unit. | 07-30-2009 |
| 20090196363 | RADIO COMMUNICATIONS APPARATUS AND COMMUNICATION METHOD - A radio communications apparatus transmitting data using multiple antennas is disclosed that includes a data link layer control information generation part configured to generate multiple data link layer control information items from generated data link layer control information; a data unit generation part configured to generate multiple data units to be transmitted through the corresponding antennas, based on the data link layer control information items generated by the data link layer control information generation part, so that the data units include the data link layer control information items; and a physical layer processing part configured to perform adaptive modulation and coding on the data units. | 08-06-2009 |
| 20090219874 | RADIO COMMUNICATION SYSTEM - A radio communication system in which radio communication is carried out between a terminal and a base station through any of the predetermined number of random access slots. The radio communication system includes a base station which subjects a received access signal to CRC error judgment and signal-to-noise ratio judgment. When the CRC error judgment yields a code error, and when the signal-to-noise ratio is greater than a prescribed reference value, the radio communication system judges that there is collision of random access between a plurality of terminals. The communication system avoids a state in which communication cannot be established, and which arises when collision detection and a transmission reset function are not added to RACH in LTE. | 09-03-2009 |
| 20090219877 | COMMUNICATION APPARATUS AND ALLOCATION DETERMINING METHOD - A communication apparatus for communicating via a frame containing a plurality of first type blocks into which pilot information is inserted and a plurality of second type blocks into which control information or data is inserted, the communication apparatus including a channel estimation accuracy predicting unit for predicting channel estimation accuracy of each of the plurality of second type blocks based on channel estimate values of the plurality of first type blocks in the frame. The communication apparatus includes an allocation determining unit for determining an allocation based on priority information containing a priority of each type of the control information and data such that control information or data of a higher-priority type is inserted into a block among the plurality of second type blocks with higher channel estimation accuracy. | 09-03-2009 |
| 20090303965 | RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION APPARATUS - A radio communication method for performing radio communication in a terminal apparatus and a base station apparatus, including: allocating a first access slot to each of the terminal apparatus, and a second access slot to a plurality of the terminal apparatuses, out of access slot to be used when the terminal apparatus is connected to the base station apparatus, in the base station apparatus; transmitting an information of the allocated access slot to the terminal apparatus, in the base station apparatus; an receiving the information of the allocated access slot sent from the base station, and sending a signal to establish connection to the base station apparatus based on the received information of the access slot, in the terminal apparatus. | 12-10-2009 |
| 20090310547 | CHANNEL INSERTING METHOD, TRANSMITTER, AND RECEIVER - A channel inserting method includes calculating, based on a band of an assigned channel, vacant bandwidth that is assignable to a reference signal; and setting an insertion format of the reference signal based on the vacant bandwidth. | 12-17-2009 |
| 20100058137 | DATA RETRANSMISSION METHOD AND RADIO COMMUNICATION SYSTEM USING THE SAME - A data retransmission method for a radio communication system, in which a plurality of data streams are transmitted from a plurality of transmission systems, the method includes when there is a transmission error in transmission data in any of the plurality of data streams, adaptively selecting beamforming or spatial coding for retransmission of the transmission data; and retransmitting the transmission data with transmission errors by using either of selected beamforming or spatial coding, wherein a criterion for adaptively selecting the beamforming or spatial coding is that by comparing a retransmission period with a prescribed fading speed, the beamforming is selected when the retransmission period is smaller than the prescribed fading speed, while the spatial coding is selected when the retransmission period is smaller than the prescribed fading speed. | 03-04-2010 |
| 20100172329 | HANDOVER CONTROL APPARATUS, MOBILE STATION, BASE STATION, HANDOVER CONTROL SERVER, AND HANDOVER CONTROL METHOD - In handover control, a data collection unit collects measurement data that indicates communication quality of uplink and downlink paths between a mobile station and base stations. A candidate evaluation unit evaluates which base station is optimal for uplink, as well as which base station is optimal for downlink, based on the measurement data. A station selection unit determines which link has priority, either uplink or downlink, according to the class of data services that the mobile station uses in radio communication, and selects as a target base station for handover the base station that has been determined as being optimal for the link having priority. | 07-08-2010 |
| 20100317293 | BROADCAST SERVICE SIGNAL TRANSMISSION METHOD AND TRANSMISSION DEVICE - When a transmission device transmits a broadcast service signal using a radio signal, the transmission device determines whether there is a moving body that is moving at high speed toward or away from the transmission device, and calculates the amount of Doppler shift of a radio frequency due to high speed movement based on the movement speed of the moving body when there is such a high-speed moving body. Moreover, the transmission device shifts the frequency of the radio signal for transmitting the broadcast service signal by the Doppler shift amount in the opposite direction of Doppler shift direction. By doing so, it is possible for a moving terminal to receive the broadcast service signal from the original radio frequency regardless of Doppler shifting. | 12-16-2010 |
| 20100323630 | RECEPTION APPARATUS, MOBILE EQUIPMENT, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A reception apparatus includes a receiver having respective antennas for receiving signals of different respective polarized wave surfaces, an estimation unit configured to estimate a propagation characteristic between the reception apparatus and a mobile equipment, a calculation unit configured to calculate at least one of weights of respective beam formings at which the signals received by the receiver are the respective polarized wave surfaces based on an estimation result of the estimation unit, and a transmitter configured to transmit the weight calculated by the calculation unit to the mobile equipment. | 12-23-2010 |
