Abstract: A wireless communication system includes a primary base station; a plurality of base stations other than the primary base station; and a mobile station. Coordinated communication is executed among the primary base station, the base stations, and the mobile station. When configuring a set of one or more transmission stations and one or more reception stations of the coordinated communication, one of the reception stations of the coordinated communication transmits information about a result of measuring a known signal as a pilot from the transmission stations in response to request signals from the other base stations, respectively, to the primary base station.

Abstract: In a radio communication system a first radio station performs communication by the use of a first radio signal. A second radio station receives a second radio signal which is indistinguishable from the first radio signal. A third radio station is in a radio communication area of the first radio station and a radio communication area of the second radio station. A communication format conversion unit generates a third radio signal by converting a communication format of the second radio signal to a communication format which is distinguishable from the first radio signal, and communicates with the third radio station by the use of the third radio signal.

Abstract: A wireless communication system having a base station communicating with a plurality of terminals using a plurality of frequency bands, the wireless communication system includes a controller configured to perform a transmission assignment for each of the plurality of terminals based on a bandwidth in which each terminal is able to communicate; and a communication device configured to enable the base station to communicate with a terminal according to a result of the transmission assignment.

Abstract: A wireless communication system includes a wireless base station, a mobile station configured to communicate with the wireless base station, and a relay station configured to relay the communication between the wireless base station and the mobile station. When the number of the mobile stations communicating with the wireless base station is judged to have become smaller than or equal to a given number, a power controller in the relay station executes at least one of power control to cut off the power for relaying the communication, power control to perform intermittent operation, and power control to perform power-saving operation.

Abstract: Each of two or more base stations notifies a communication controller of information on a first frequency band that the base station uses for radio communication. Based on the information on the first frequency bands acquired from the two or more base stations, the communication controller selects a second frequency band to be used by the two or more base stations to transmit the data with common content, and notifies the two or more base stations of information on the selected second frequency band. The two or more base stations transmit the data with common content based on the information on the second frequency band acquired from the communication controller.

Abstract: A base station accommodated in a communications system for communicating with a mobile station, the base station includes: a transmitter configured to generate frequency band information indicating which frequency band of frequency bands used in the communications system to communicate with a mobile station, to transmit the frequency band information by using a specific frequency band selected from a plurality of frequency bands available in the system, and to communicate with the mobile station using at least one of the plurality of frequency bands.

Abstract: A communications apparatus includes a first computing circuit and a second computing circuit communicable with the first computing circuit and performing control of wireless communication with a second communications apparatus. The communications apparatus further includes a first storage device that can be written to by the first computing circuit and to which an operation log of the second computing circuit and generated by the second computing circuit is writable via the first computing circuit; a detecting circuit configured to detect a failure in communication between the first computing circuit and the second computing circuit; and a control circuit configured to change a writing destination of the operation log to a second storage device that can be written to by the first computing circuit, when the failure is detected by the detecting circuit.

Abstract: The terminal measures the wireless channel quality of each frequency band, and notifies the base station of the quality. The base station determines the frequency band to be used by the terminal on the basis of the notification from the terminal. Then, the terminal is grouped depending on the difference etc. in frequency band in operating the terminal, and notified which terminal group the terminal belongs. Upon receipt of the notification from the base station, the terminal sets its own available frequency band and terminal group, and measures the notified wireless channel quality of the available frequency band. The measurement result is notified to the base station. The base station perform a scheduling process for each available frequency band on the basis of the wireless channel quality of the available frequency band of the terminal, and starts communicating with the terminal.

Abstract: A terminal configured to perform communication using a base station, includes a communication device that acquires billing information stored on an external storage device via a radio communication link with the external storage device, and a controller that performs a transmission operation to transmit the billing information acquired from the external storage device to a billing device, the billing device being connected to the base station via a network, storing original billing information for use in billing related to the communication that the terminal performs using the base station and temporarily switching from the original billing information to the received billing information when the billing information is received from the external storage device.

Abstract: A wireless communication system, comprising a category designation unit capable of designating a terminal category using at least a transmitting frequency bandwidth and receiving frequency bandwidth available between the system and a wireless terminal device.

Abstract: A base station device comprises a detection unit which obtains the results of detection of the packet lengths of packets which are transmitted by data communications of a mobile station device and a service-quality request control unit which controls a request for service quality for data communication corresponding to the results of detection.

Abstract: A radio communications system includes a radio base station, an intermediate station to receive data from the radio base station and relay the received data; and another radio base station adjacent to the radio base station. The radio base station transmits data that is the same as the data to be relayed by the intermediate station, in synchronization with the relaying by the intermediate station and by using a radio resource that the intermediate station uses in the relaying of the received data.

Abstract: A base station accommodated in a communications system for communicating with a mobile station, the base station includes: a transmitter configured to generate frequency band information indicating which frequency band of used frequency bands available in the communication system is to be used for transmission of data information with a mobile station, to transmit the frequency band information by using a specific frequency band assigned from the used frequency bands, and to transmit data information by using at least one of the frequency bands; wherein the frequency bands except for the specific frequency band, are made variable.

Abstract: A wireless communication system, comprising a category designation unit capable of designating a terminal category using at least a transmitting frequency bandwidth and receiving frequency bandwidth available between the system and a wireless terminal device.

Abstract: A communication system includes: a first base station; one or more second base stations; and a terminal. The first base station includes an acquiring unit that acquires information about reception time, at which the terminal receives information sent from the first base station and the one or more second base stations by using one or more frequency bands or transmission time of each frequency band at the terminal or both, and a first control unit that controls, based on information about the reception time or the transmission time acquired by the acquiring unit, frequency bands that are simultaneously used by the terminal. The terminal includes a second control unit that performs control, in accordance with the control performed by the first base station, such that communication is performed by simultaneously using the frequency bands.

Abstract: A radio communication system, including: a base station apparatus; and a terminal apparatus, wherein the base station apparatus and the terminal apparatus transmits to or receives from the terminal apparatus and the base station apparatus respectively a radio signal by using a plurality of frequency bands as a transmission frequency or a reception frequency, the base station apparatus includes a transmission unit which transmits a synchronization signal or a reference signal in each frequency band of the plurality of frequency bands, and the terminal apparatus includes a synchronization control unit which selects at least one synchronization signal or reference signal from the plurality of synchronization signals or reference signals transmitted from the base station apparatus and performs synchronization control based on the selected synchronization signal or reference signal.

Abstract: Two or more base stations among a plurality of base stations transmit data of the same content at the same timing. A base station notifies a mobile station of two or more base stations which transmit the data of the same content among the plurality of base stations. The mobile station transmits information indicating reception conditions in the mobile station of radio signals from the base stations notified of, to the base station. According to the information indicating the reception conditions, the base station instructs the mobile station to receive the data of the same content from the base stations.

Abstract: A radio communication system including: a first and second base station apparatuses which include one or more of sells or sectors respectively; and a terminal apparatus, wherein the first and second base station apparatuses and the terminal apparatus performs radio communication, the first and second base station apparatuses includes: a process unit which performs a scrambling process to a first and second transmission data respectively by using a common scrambling code when the first and second transmission data differing each of the cells or the sectors are transmitted to the terminal apparatus; and a transmission unit which transmits the scrambling processed first and second transmission data to the terminal apparatus respectively, and the terminal apparatus includes a reception unit which receives the first and the second transmission data and performs descrambling process to the first and the second transmission data by using the common scrambling code.

Abstract: A radio communication system including: a first and second base station apparatuses which include one or more of sells or sectors respectively; and a terminal apparatus, wherein the first and second base station apparatuses and the terminal apparatus performs radio communication, the first and second base station apparatuses includes: a process unit which performs a scrambling process to a first and second transmission data respectively by using a common scrambling code when the first and second transmission data differing each of the cells or the sectors are transmitted to the terminal apparatus; and a transmission unit which transmits the scrambling processed first and second transmission data to the terminal apparatus respectively, and the terminal apparatus includes a reception unit which receives the first and the second transmission data and performs descrambling process to the first and the second transmission data by using the common scrambling code.

Abstract: A wireless communication system including: at least one base station configured to form each of at least one first cell being a cell to which a wireless terminal is able to couple without coupling to another cell and each of at least one second cell being a cell to which a wireless terminal is unable to couple without coupling to another cell, and a specific wireless terminal configured to: identify, when the specific wireless terminal couples to no cell, at least one known signal being at least a part of at least one first known signal based on a first rule, the at least one known signal being received from the at least one first cell, select a cell being one of the at least one first cell based on the identified at least one known signal, and couple to the selected cell.