Abstract: A radio base station that forms a cell by transmitting a radio wave and that communicates with a mobile terminal existing in the cell, the radio base station includes a reception unit configured to receive information including cell information relating to a state of a peripheral cell of the radio base station, the information being transmitted from the mobile terminal, and a calculation processing device configured to detect an abnormality relating to another radio base station corresponding to the peripheral cell based on the cell information.

Abstract: A mobile communications terminal is disclosed that includes a determination part configured to determine whether to perform relay control based on a signal received from at least one of a radio base station, a stationary relay station, and another mobile communications terminal performing relay control and a control part configured to control the mobile communications terminal so that the mobile communications terminal performs an operation as a relay station in response to the determination part determining to perform the relay control.

Abstract: A radio communication system includes: a first base station for communicating with a mobile station in a first area; and a second base station for communicating with the mobile station in a second area; the first base station including: a first receiving unit for receiving connection control information from the second station; a first setup unit for generating scheduling information; and a first transmitting unit for transmitting the generated scheduling information to the second base station and for transmitting the data decided to send to the mobile station on the basis of the scheduling information; the second base station including: a second transmitting unit for transmitting the connection control information and for transmitting the data decided to send to the mobile station on the basis of the scheduling information; and a second receiving unit for receiving the scheduling information from the first base station.

Abstract: The MS detects a difference in timing or frequency between a reference signal being any one of the received signals from a plurality of BSs and each of the other received signals, notifies the results of detection to BSs other than the source BS of the reference signal, and the BSs other than the source BS of the reference signal control the timing or frequency of transmission of the signal to be received by other MSs other than the MS on the basis of the results of the detection.

Abstract: A radio base station that forms a cell by transmitting a radio wave and that communicates with a mobile terminal existing in the cell, the radio base station includes a reception unit configured to receive information including cell information relating to a state of a peripheral cell of the radio base station, the information being transmitted from the mobile terminal, and a calculation processing device configured to detect an abnormality relating to another radio base station corresponding to the peripheral cell based on the cell information.

Abstract: A radio communication system includes a plurality of radio base stations, and a control station which controls the plurality of radio base stations, wherein the control station comprises a controller which determines a peripheral base station, from among a plurality of peripheral base stations, and which adjusts a radio parameter for changing a range of a communication area based on each load of the plurality of peripheral base stations which are adjacent or close to a radio base station to be relieved from among the plurality of radio base stations.

Abstract: The present invention utilizes a wireless base station having a first radio transceiver and a second radio transceiver connected to the first radio transceiver with a communication cable, a first baseband unit connected to the first radio transceiver with a communication cable, and a second baseband unit connected to the second radio transceiver with a communication cable.

Abstract: Circuit scale and power consumption of a base station is reduced with a feature of a sector-free configuration in routing processing. The feature is realized in a base station having transmitters corresponding to a plurality of sectors, as there are a switch distributing signals corresponding to a plurality of subcarriers to the plurality of sectors, respectively, and an inverse Fourier transform processor performing inverse Fourier transform processing on the signals for the plurality of sectors distributed by the switch, so as to supply to each corresponding transmitter among transmitters corresponding to the plurality of sectors.

Abstract: A radio communication apparatus for performing radio communicate with other radio communication apparatus, the radio communication apparatus including: a quality measuring unit which measures reception quality of reception signal which is received from the other radio communication apparatus; a first error detecting unit which detects an error of reception data included in the reception signal on the basis of the reception quality and a first threshold value; and a retransmission request signal generating unit which generates a retransmission request signal on the basis of an error detection result of the first error detection unit, and transmits the retransmission request signal to the other radio communication apparatus.

Abstract: A radio communication system includes: a first base station for communicating with a mobile station in a first area; and a second base station for communicating with the mobile station in a second area; the first base station including: a first receiving unit for receiving connection control information from the second station; a first setup unit for generating scheduling information; and a first transmitting unit for transmitting the generated scheduling information to the second base station and for transmitting the data decided to send to the mobile station on the basis of the scheduling information; the second base station including: a second transmitting unit for transmitting the connection control information and for transmitting the data decided to send to the mobile station on the basis of the scheduling information; and a second receiving unit for receiving the scheduling information from the first base station.

Abstract: The MS detects a difference in timing or frequency between a reference signal being any one of the received signals from a plurality of BSs and each of the other received signals, notifies the results of detection to BSs other than the source BS of the reference signal, and the BSs other than the source BS of the reference signal control the timing or frequency of transmission of the signal to be received by other MSs other than the MS on the basis of the results of the detection.

Abstract: A transmission power control method is employed in a communication system, which uses multiple carriers. A plurality of different modulation systems are allocated to a plurality of different frequency subcarriers. A signal amplitude gain corresponding to a predetermined power offset from an average signal power is provided to a corresponding frequency subcarrier for each of the modulation systems allocated to the plurality of different frequency subcarriers. Therefore, service area can be expanded and signal quality can be maintained at a high transmission capacity.

Abstract: A mobile communications terminal is disclosed that includes a determination part configured to determine whether to perform relay control based on a signal received from at least one of a radio base station, a stationary relay station, and another mobile communications terminal performing relay control and a control part configured to control the mobile communications terminal so that the mobile communications terminal performs an operation as a relay station in response to the determination part determining to perform the relay control.

Abstract: The present invention utilizes a wireless base station having a first radio transceiver and a second radio transceiver connected to the first radio transceiver with a communication cable, a first baseband unit connected to the first radio transceiver with a communication cable, and a second baseband unit connected to the second radio transceiver with a communication cable.

Abstract: Circuit scale and power consumption of a base station is reduced with a feature of a sector-free configuration in routing processing. The feature is realized in a base station having transmitters corresponding to a plurality of sectors, as there are a switch distributing signals corresponding to a plurality of subcarriers to the plurality of sectors, respectively, and an inverse Fourier transform processor performing inverse Fourier transform processing on the signals for the plurality of sectors distributed by the switch, so as to supply to each corresponding transmitter among transmitters corresponding to the plurality of sectors.

Abstract: The radio communication apparatus includes: one or more radio units each with one or more antennas; a plurality of baseband processing units which perform baseband signal processing of signals, transceived by said radio units, in a frequency domain; and a connection interface which interfaces between said radio unit and any of said plurality of baseband processing units with signals in a frequency domain. With this arrangement, the transmission capacity of an interface inside the radio communication apparatus and power consumption are reduced, and the radio communication apparatus has superior flexibility and functional expandability for various types of services.

Abstract: A CDMA receiving apparatus has an AD conversion unit (54, 55) for converting a receive signal to digital data and outputting digital data obtained by 2×oversampling; a correlation calculation unit (56b) for calculating correlation between a reference code sequence, which is a code sequence identical with a spreading code sequence, and the digital data sequence; an interpolator (56d) for performing interpolation between correlation values to thereby generate a correlation-value data sequence corresponding to 4×oversampling; and a timing decision unit (56f) for obtaining a peak timing of correlation values as a delay time of a signal that arrives via a prescribed path, and deciding despread-start timing based upon this delay time.

Abstract: A crankcase for a motorcycle is divided into an upper half and a lower half. A crankshaft, a main shaft, a counter shaft, and a pivot portion are arranged substantially on a straight line along a parting plane P of the crankcase. An eccentric cam and a pivot collar are disposed in the pivot portion, and a rear swing arm is connected to the pivot shaft. The upper half and lower half are vertically mated to each other in front of and behind the pivot portion and then vertically fastened to each other. The center of the pivot collar is offset downwardly from the parting plane P.