Abstract: A wireless base station includes a first receiving section which receives data from a plurality of terminals positioned within a wireless area in which data communication with a processing section on a network is performed by the wireless base station via a core network, a multiplexing controller which shares, with the processing section, first identification information allocated to a group and second identification information allocated to each of a plurality of member terminals constituting the group, and controls to determine whether a terminal serving as a source of the received data is a member terminal belonging to the group, based on the second identification information, and to multiplex, of the received data from the plurality of terminals, data from the terminal determined to be the member terminal belonging to the group, based on the first identification information, and a first sending section sends the multiplexed data to the core network.

Abstract: In a communication terminal that performs bidirectional communication using different frequencies for transmission and reception, a receiving unit receives reception signals transmitted from the base station, a detecting unit detects the timing of DL when the receiving unit receives the reception signals, an adjusting unit adjusts the timing of UL to transmit the transmission signals so as to synchronize the timing of the DL 101 and the timing of the UL, and a transmitting unit transmits transmission signals to the base station based on the timing of UL adjusted.

Abstract: A base station performs wireless communication with a first apparatus, and performs wired communication with a second apparatus. When a first communication speed corresponding to a wireless quality of the wireless communication is higher than a second communication speed of the wired communication, the base station changes a currently set modulation and coding scheme to a modulation and coding scheme corresponding to the second communication speed.

Abstract: A communication method is provided. The communication method includes specifying, by a communication apparatus, a position of a coverage hole which is a region where a terminal does not receive a radio wave with an intensity which allows communication to be performed, the communication apparatus being included in a wired network in which the terminal performs communication via a base station. The communication method also includes determining, by the communication apparatus, a hole proximity terminal which has a possibility of coming close to the coverage hole. The communication method also includes transmitting, by the communication apparatus, to the hole proximity terminal a notification message for notifying of hole information to specify a position of the coverage hole.

Abstract: 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.

Abstract: A user equipment transmits information for a radio base station using either of radio resources associated with individual multi-beams, which may be formed by the radio base station, and the radio base station performs reception processing of the radio resources for the individual multi-beams.

Abstract: 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.

Abstract: A wireless communication system including: a terminal, and a base station including an antenna configured to perform wireless communication with the terminal, and a processor configured to perform, when a difference between a first throughput at a radio layer for the wireless communication and a second throughput at an upper layer to the radio layer for the wireless communication is larger than a given value, a processing to decrease errors at a radio layer for the wireless communication.

Abstract: A relay node includes a processor that determines, based on uplink scheduler information, a target frequency band from plural frequency bands assigned to signals received from plural user equipments and multiplexes the signals received from the plural user equipments and a wireless communication interface that transmits the signals as a single carrier signal to a base station based on the target frequency band.

Abstract: A communication system includes a base station device that includes a setting unit where, when the bandwidth of a signal to be transmitted from the base station device to the wireless terminal is set from a first bandwidth to a second bandwidth, which is narrower than the first bandwidth, the transmission power per unit bandwidth of the signal to be transmitted from the base station device to the wireless terminal is set from a first transmission power to a second transmission power, which is larger than the first transmission power, and when the bandwidth is set from the second bandwidth to the first bandwidth, the transmission power is set from the second transmission power to the first transmission power, and the wireless terminal includes a reception unit that receives a notification of the set bandwidth and uses the set bandwidth to receive a signal.

Abstract: A wireless communication device including: a plurality of antennas configured to perform a plurality of wireless communication protocols simultaneously, and a processor configured to obtain each of a plurality of power consumptions for each of the plurality of the wireless communication protocols, to obtain each of a plurality of communication throughput for each of the plurality of the wireless communication protocols, to calculate an aggregated communication efficiency of the wireless communication using the plurality of wireless communication protocols simultaneously based on the plurality of the power consumptions and the plurality of the communication throughput, and to control the plurality of the antennas, when the aggregated communication efficiency exceeds a given value, as to perform the plurality of wireless communication protocols simultaneously, and, when the aggregated communication efficiency is equal to or less than the given value, as to stop one of the plurality of wireless communication pro

Abstract: A communication system includes a base station and a mobile terminal device. The base station includes a detection information notifying unit. The detection information notifying unit notifies, using a predetermined control channel, the mobile terminal device of detection information that includes a power-saving time that indicates a time that elapses before the base station enters a power-saving state. The mobile terminal device includes a detecting unit and a region information notifying unit. The detecting unit, when being notified of the detection information by the detection information notifying unit, detects a region in which a mobile terminal device is not capable of communicating with any base station based on the power-saving time included in the detection information. The region information notifying unit notifies a given base station of information on the region detected by the detecting unit.

Abstract: 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.

Abstract: A method of detecting a hole area to be generated in a cover area of a communication system which includes a plurality of base station apparatuses and mobile station apparatuses, includes: measuring received powers from the plurality of base station apparatuses at the mobile station apparatuses, and, based on the received power from the other base station apparatus among a plurality of base station apparatuses other than the base station apparatus which covers a cell in which the mobile station apparatuses are positioned, detecting a hole area to be generated when a signal output from the base station apparatus is stopped.

Abstract: A mobile station capable of communication through a plurality of radio interfaces differing in at least one among radio scheme and frequency band, includes a determining unit that determines execution of concurrent communication based on a communication state of the mobile station, the concurrent communication concurrently using the radio interfaces for communication; and a communicating unit that performs the concurrent communication based on a determination result obtained by the determining unit.

Abstract: 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.

Abstract: A wireless base station includes a first receiving section which receives data from a plurality of terminals positioned within a wireless area in which data communication with a processing section on a network is performed by the wireless base station via a core network, a multiplexing controller which shares, with the processing section, first identification information allocated to a group and second identification information allocated to each of a plurality of member terminals constituting the group, and controls to determine whether a terminal serving as a source of the received data is a member terminal belonging to the group, based on the second identification information, and to multiplex, of the received data from the plurality of terminals, data from the terminal determined to be the member terminal belonging to the group, based on the first identification information, and a first sending section sends the multiplexed data to the core network.

Abstract: A communication apparatus includes a receiving unit, an extracting unit, a generating unit and a transmitting unit. The receiving unit receives a signal from a first network using a first communication method. The extracting unit extracts, from a signal received via a control channel of the first network, notification information that is broadcast to be notified to a communication apparatus belonging to the first network and also used by a communication apparatus belonging to a second network. Here, the second network uses a second communication method different from the first communication method. The generating unit generates a notification frame used to notify the communication apparatus belonging to the second network of the notification information. The transmitting unit transmits the notification frame to the communication apparatus belonging to the second network.

Abstract: In a radio system performing scheduled transmission to a plurality of receiving stations from a transmitting station having a plurality of antennas, a transmitting station obtains reception quality information estimated from feedback information obtained from the plurality of receiving stations, determines whether a transmission system performs beamforming, which transmits data of an identical stream by weighting each of the plurality of antennas based on the obtained reception quality information, or performs MIMO multiplexing, which transmits data of different streams respectively from the plurality of antennas, and transmits information to identify the determined transmission system by adding to a scheduler management channel.

Abstract: 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.