Patent application number | Description | Published |
20130094560 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD - A communication apparatus including: a receiver to receive signals including reference signals at each of a plurality of different reception intervals; and a processor to estimate phase differences between the signals based on the reference signals, to determine a plurality of phase difference candidates for each of the reception intervals based on the phase differences, to select, from among a plurality of combinations of the phase difference candidates for the reception intervals, a combination of the phase difference candidates between the signals, and to estimate a frequency deviation of the signals based on the phase difference candidates included in the combination. | 04-18-2013 |
20130188609 | COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND CONTROL DEVICE - A communication system includes: a plurality of mobile stations each of which performs wireless communication with a base station; a plurality of base stations each of which selects, for each transmission timing, a mobile station which performs wireless communication for transmission of a radio signal with the base station, from mobile stations that are coupled to the base station among the plurality of mobile stations; and a control device that calculates, for each transmission timing, a parameter for each of a communication source in the transmission of the radio signal, the parameter being calculated so that a communication quality of each of the mobile stations selected for the transmission timing by each of the plurality of base stations satisfies a certain condition; wherein the each of the communication source transmits the radio signal at each transmission timing, using a parameter for the communication source calculated by the control device. | 07-25-2013 |
20130190034 | BASE STATION, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A base station including: a transmitter configured to transmit a first radio signal to a first mobile station, a receiver configured to receive a second radio signal, a processor configured to detect a second mobile station communicates with a communication device differing from the base station, based on a third radio signal from the second mobile station which is contained in the second radio signal, the first radio signal interfering with a radio communication between the second mobile station and the communication device, and to decrease transmission power of the first radio signal, on detecting the second mobile station or failing to detect the second mobile station over a first given period or longer. | 07-25-2013 |
20130230001 | BASE STATION APPARATUS, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A first base station apparatus that forms a first cell, the first base station apparatus includes an assigning unit that assigns a radio resource for a control channel between a mobile station apparatus and the first base station apparatus, and a first transmitting unit that transmits radio resource information indicating the radio resource assigned for the control channel to the second base station apparatus forming a second cell that is different from the first cell. | 09-05-2013 |
20140004888 | COMMUNICATION CONTROL APPARATUS, COMMUNICATION CONTROL SYSTEM AND COMMUNICATION CONTROL METHOD | 01-02-2014 |
20140057641 | COMMUNICATION CONTROL APPARATUS, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A communication control apparatus including: a processor configured to set each of starting time candidates for each of data communications performed by each of wireless communication apparatuses respectively, to estimate each of finishing time candidates for each of the data communications which corresponds to each of the starting time candidates, and to set each of starting times when each of wireless communication apparatuses is to start each of the data communications to each of the starting time candidates, by performing an optimization of a final finishing time candidate which is the final one of the finishing time candidates. | 02-27-2014 |
20140120933 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus, includes: a processor configured to: perform a first detection to detect another wireless communication apparatus that shares given frequency bands with the wireless communication apparatus and that causes interference with the wireless communication apparatus, perform a second detection to detect a second wireless terminal that has communication quality lower than or equal to a given value from a first wireless terminal that communicates with the wireless communication apparatus, and select a frequency band from the given frequency bands for communication with the first wireless terminal based on a combination of detection result of the first detection and the second detection; and a transmitter coupled to the processor and configured to transmit a signal to the first wireless terminal using the selected frequency band. | 05-01-2014 |
20140287678 | TRANSMISSION POWER MANAGEMENT DEVICE AND TRANSMISSION POWER MANAGEMENT METHOD - A transmission power management device including: a memory, and a processor coupled to the memory and configured to: acquire a first path loss between a first relay station and a second relay station, the first relay station relaying a first signal, the second relay station relaying a second signal, and adjust a first transmission power of the first signal by the first relay station based on the first path loss. | 09-25-2014 |
20140364125 | BASE STATION AND HANDOVER CONTROL METHOD - A base station serving terminals, the base station including: a memory, and a processor coupled to the memory and configured to: select a terminal among the served terminals based on reception powers or reception qualities at the served terminals, when a number of the served terminals exceeds a threshold, determine an amount of change in transmission parameter so that a reception quality at the selected terminal from another base station satisfies a certain condition in case where a handover of the selected terminal to the other base station is performed, the other base station being selected based on the reception powers or the reception qualities, perform the handover of the selected terminal to the other base station, and change the transmission parameter by the determined amount of change. | 12-11-2014 |
20150030006 | RADIO BASE STATION AND CHANNEL ESTIMATION METHOD - A radio base station including: a processor configured to precode a first reference signal based on a first precoding matrix and a second reference signal based on a second precoding matrix, transmit the precoded first reference signal using a first radio resource and the precoded second reference signal using a second radio resource, to a radio terminal, receive first channel state information and second channel state information from the radio terminal, the first channel state information indicating a first channel estimated at the radio terminal based on the precoded first reference signal, the second channel state information indicating a second channel estimated at the radio terminal based on the precoded second reference signal, and estimate a downlink channel between the radio base station and the radio terminal based on the first channel state information, the second channel state information, the first precoding matrix, and the second precoding matrix. | 01-29-2015 |