Abstract: A relay station capable of communicating with a first base station, a second base station, and a mobile station, includes a relay unit configured to relay communication between the first base station and the mobile station; a receiving unit configured to receive load information concerning the second base station; and a changeover unit configured to change, from the first base station over to the second base station, a communication counterpart of the mobile station, communicating with the mobile station via the relay unit, the communication counterpart being changed based on the received load information.

Abstract: A communication device enables transmitting remaining packets to a terminal during a handover, with reduced inter-cell interference and with improved throughput. The communication device allocates a plurality of frequency bands each to different terminals for wireless communication. A power booster increases transmission power of one of the frequency bands, and a frequency band allocator allocates the frequency band with the increased transmission power to a terminal that is performing a handover. Thus, the communication device can transmit the remaining packets to the terminal with the increased transmission power.

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: A transmitting station in the radio system performing scheduled transmission to a plurality of user terminals including: a plurality of antennas and a reception unit configured to obtain reception quality information estimated from a pilot channel among information fed back from each of the plurality of user terminals, to determine based on the obtained reception quality information, a transmission system for the plurality of antennas and a transmission unit configured to add a specific bit which identifies the determined transmission system to a scheduler management channel, and to vary contents of the other bit area in the scheduler management channel, as corresponding to the specific bit, and further transmit the scheduler management channel to the plurality of user terminals.

Abstract: A communication device that is capable of communicating with a mobile terminal in cooperation with another communication device, and is capable of communicating with the mobile terminal via the other communication device. This communication device characteristically includes: a mode selecting unit configured to select one of a cooperative communication mode and a relayed communication mode, the cooperative communication mode being for transmitting notification information to the mobile terminal, the notification information being for causing the other communication device to perform a cooperative communication, the relayed communication mode being for causing the other communication device to relay notification information to the mobile terminal; and a mode information transmitting unit configured to transmit mode information to the other communication device, the mode information indicating a result from the mode selecting unit.

Abstract: A relay station includes a wireless communication interface configured to receive radio signals transmitted from plural mobile stations; and a processor configured to descramble the radio signals and extract identification information of physical layers of the mobile stations, and to convert the identification information of the physical layers to identification information of MAC layers, which are data link layers, and form a protocol data unit which includes the identification information of the MAC layers in a header and includes service data units of the radio signals.

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 radio communication system that uses multiple antennas to transmit signals to a plurality of mobile terminals, and that measures the reception quality of each signal that is transmitted from each antenna on a transmitting side and received by the mobile terminal, determines a main antenna based on that reception quality for real-time communication, calculates multi-dimension correlation between the main antenna and other antennas, selects resources where the multi-dimension correlation is lower than a set value, feeds back data to the transmitting side indicating the main antenna, low correlation resources and reception qualities, designates antennas having resources of low correlation as diversity antennas, and performs diversity transmission from the transmitting side of signals to the mobile station using those diversity antennas and the main antenna.

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 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.

Abstract: 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.

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 that performs data communication using a plurality of sub carriers, and repeatedly generates frame patterns comprising one combination or more of at least two types of frames in which the number of common pilots in each is different, and transmits data for mobile terminals having poor receiving quality in a frame having a large number of common pilots, and transmits data for mobile terminals having good receiving quality in a frame having a small number of common pilots.

Abstract: There is provided a radio communication device having a high quality and accuracy regardless of fluctuation degree of the transmission path characteristic. The radio communication device estimates the fluctuation speed of the transmission path characteristic from the time correlation of the reception signal, judges the diversity technique used between the communication devices from the estimated value, and feeds back the judgment information so as to switch the diversity between the communication devices, thereby increasing the diversity gain. The feedback information is minimized by defining a correspondence table. Moreover, diversity switching is performed at a timing considering a control delay and a propagation path delay so as to prevent an instantaneous disconnection of the communication.

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.

Abstract: [PROBLEMS] To prevent the generation of deterioration odor caused by the oxidation of a food or beverage containing a highly unsaturated fatty acid (HUFA)-containing fat-and-oil during storage, and provide a HUFA-containing liquid composition having excellent long-term flavor stability. [MEANS FOR SOLVING PROBLEMS] A HUFA-containing food or beverage, characterized in that a HUFA-containing oil-and fat, a ground soy-bean meal and water are blended together and homogenized as raw materials and these raw materials have an acidic property.

Abstract: 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.

Abstract: 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.

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 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.