Abstract: When allocating CCEs as a radio resource to a plurality of radio terminals within a predetermined sector, the disclosed radio base station (1) acquires an AL for each radio terminal within the predetermined sector, and sets a CCE allocating order for the radio terminals in descending order of corresponding AL size. Furthermore, the radio base station (1) allocates CCEs to predetermined radio terminals to be allocated to in accordance with the set allocating order.

Abstract: Provided is a radio communication method employed in a base station having plural antenna elements. The method includes the steps of: setting an inner zone and an outer zone by dividing a cell formed by the base station into two; determining whether a mobile station is located in the inner zone or the outer zone on the basis of a predetermined criterion; notifying the mobile station located in the inner zone of control information, including information on channel allocation and a communication method, through a broadcast channel; and notifying the mobile station located in the outer zone of control information through a dedicated channel by beamforming using the plural antenna elements.

Abstract: A wireless communication apparatus prevents deterioration of communication characteristics because of a transmission weight of a highest common factor and enhances the communication characteristics of feedback MIMO.

Abstract: A power controller is provided in a consumer having a load equipment and controls an operation of the load equipment. The power controller comprises: an acquisition unit that acquires a plurality of operation modes for determining an operation status of the load equipment, or acquires operation parameters configuring each of the plurality of operation modes and being for controlling the load equipment; a setting unit that sets any of the plurality of operation modes of the load equipment; a provisional operation control unit that provisionally operates the load equipment on the basis of the plurality of operation modes; and a measurement unit that measures, for each of the plurality of operation modes, a provisional power consumption consumed by the load equipment, during the provisional operation of the load equipment.

Abstract: In a power control system provided with a consumer controller that controls an operation of a load equipment provided in a consumer, a system-side controller communicates with the consumer controller. The system-side controller comprises: a storage unit that associates device identification information, an operation parameter, operating environment information, and a power consumption with one another and stores them; a reception unit that receives, from the consumer controller, power consumption request information including the device identification information of the load equipment provided in the consumer and the operating environment information; a control unit that extracts the operation parameter and the power consumption from the storage unit on the basis of the device identification information and the operating environment information included in the power consumption request information; and a transmission unit that transmits an extraction result by the control unit to the consumer controller.

Abstract: A radio base station (100) is provided with a stream determination unit (141) for determining whether communication quality of a radio communication channel between the radio base station (100) and a receiving device is lower than a predetermined threshold, and an antenna selector (142) for selecting, from among transmitting antennas (131-134), transmitting antennas such that the distance between the transmitting antennas (131-134) becomes shorter than that before the communication quality is determined to be lower than the predetermined threshold when the communication quality is determined to be lower than the predetermined threshold.

Abstract: A radio communication system 1 includes a pico-cell base station PeNB in stalled in a communication area of a macro-cell base station MeNB, having lower transmission power than the macro-cell base station MeNB, and expanded in its coverage. The macro-cell base station MeNB determines a degree of expanding the coverage of the pico-cell base station PeNB, according to an amount of usable PDSCH resources of the macro-cell base station MeNB.

Abstract: A radio communication system 1 comprises a picocell base station PeNB placed within a communication area of a macrocell base station MeNB and has transmission output lower than the macrocell base station MeNB. A coverage of the picocell base station PeNB is expanded. A usable resource being a radio resource which a high-power base station is allowed to use as PDSCH is determined on the basis of a degree of expansion of coverage of a low-power base station.

Abstract: A channel estimation unit 18 estimates characteristics of a channel (channel estimation) based on signals received by a plurality of antennas. An SVD unit 19 performs singular value decomposition on each channel estimation value. An orthogonality determination unit 20 determines (recognizes) whether orthogonality of a plurality of eigenpaths is maintained or collapsed based on information indicating quality of a channel between a transmission apparatus and a reception apparatus. A reception scheme estimation unit 22 estimates a reception scheme to separate eigenpaths of a reception unit 2 based on information indicating quality of a channel in each eigenpath. A transmission adaptive control unit 23 performs predetermined control of a transmission apparatus 1 at transmission based on the reception scheme of the reception apparatus estimated by the reception scheme estimation unit 22 and a result of determination (recognition) by the orthogonality determination unit 20.

Abstract: When receiving a signal from the antenna #1 (initially receiving a signal from an omnidirectional antenna), a guard interval correlator 12 calculates correlation of a guard interval portion of the received signal and an output measuring unit 13 measures a peak output of the guard interval correlator 12. A comparator 14 compares the peak output measured by the output measuring unit 13 with a preset threshold, and when the peak output falls below the preset threshold and outputs an antenna switching control signal to an antenna switch 11, and the antenna switch 11 switches to the antenna #2 having a different directivity.

Abstract: A radio base station (eNB1) receives load information indicating the load level of different radio base station (eNB2) and adjusts a base station parameter, which is used for defining coverage, in accordance with a result of comparison between the load level of the radio base station (eNB1) and that of the different radio base station (eNB2). The radio base station (eNB1) corrects at least one of the load level of the radio base station (eNB1) and that of the different radio base station (eNB2), which are compared with each other, in accordance with a number of radio terminals connected to the radio base station (eNB1).

Abstract: Disclosed is a radio base station (eNB1) provided with a storage unit (130) for storing base station information for selecting the destination of a message, a network communication unit (140) for transmitting the message to another radio base station selected according to the base station information, and a control unit (120) for controlling the storage unit (130) to set as base station information the priority level of the radio base station to which the message was sent according to the state of response to the transmitted message.

Abstract: A radio base station eNB10-1 sends a Resource Status Request message for requesting initiation of transmission of a second load information to a radio base station eNB10-2 when a load level thereof is equal to or higher than a first threshold, and omits transmission of the Resource Status Request message for requesting initiation of transmission of the second load information when the load level thereof is lower than the first threshold. The radio base station eNB10-2 sends a Resource Status Update message including the second load information upon receipt of the Resource Status Request message for requesting initiation of transmission of the second load information.

Abstract: A radio base station (eNB10-1) transmits a Resource Status Update message including first load information indicating the load level thereof to a radio base station (eNB10-2) when the load level thereof is less than a first threshold, and omits the transmission of the Resource Status Update message including the first load information when the load level thereof is the first threshold or more.

Abstract: A radio base station (eNB1), which is used in a radio communication system that can autonomously adjust, based on load information transmitted/received between radio base stations, the radio base station parameters used for defining coverage, comprises: a network communication unit (140) that can receive, from another radio base station, first load information indicating the load level of the other radio base station and that can transmit, to the other radio base station, a request for transmission of second load information the information amount of which is greater than that of the first load information; and a control unit (120) that, when the load level of the other radio base station indicated by the received first load information satisfies a given condition, controls such that the request for transmission of the second load information is transmitted to the other radio base station.

Abstract: Upon receipt of an RLF Indication message indicating a failure in a handover where a radio base station eNB10-1 is the handover source from the other radio base station eNB, the radio base station eNB10-1 can recognize that its coverage is not adjusted appropriately by referring to the RLF Indication message. Moreover, the radio base station eNB10-1 can adjust coverage appropriately by expanding the radiation area of the antenna 101 whose radiation area is directed toward the other radio base station eNB being the handover target, among the antennas 101 included in the radio base station eNB10-1.

Abstract: A radio communication system (1) includes a pico-cell base station (PeNB) which is located in the communication area of a macro-cell base station (MeNB) and the transmission power of which is lower than that of the macro-cell base station (MeNB). For radio resources that can be used as PDSCH, a resource division ratio that is a ratio between unusable PDSCH resources, which cannot be used by the macro-cell base station (MeNB), and usable PDSCH resources, which can be used by the macro-cell base station (MeNB), is decided, and a radio resource is allocated, out of the usable PDSCH resources defined in accordance with the decided resource division ratio, to a radio terminal that is to connect to the macro-cell base station (MeNB). The resource division ratio is decided based on the traffic load of each base station.

Abstract: A radio communication method acquires a moving speed of a radio communication terminal located in a cell formed by a first radio base station. A second radio base station is requested to radiate a dynamic directional beam in a direction of the cell formed by the first radio base station when the moving speed is equal to or more than a predetermined threshold prior to entering a cell formed by the second radio base station. The radio communication terminal is accommodated in the second radio base station that has transmitted the directional beam in response to the request.

Abstract: A radio base station includes: a propagation path characteristic acquisition unit which acquires propagation path characteristics between a radio communication terminal and a radio base station; and a channel controller which reports to the radio communication terminal that channel allocation information is transmitted by using a dedicated control channel if the acquired propagation characteristic satisfies a predetermined condition. After the channel control unit has reported to the radio communication terminal that the channel allocation information is transmitted by using an dedicated control channel, the channel control unit and a MAP processing unit transmit the channel allocation information by using an dedicated control channel instead of a broadcast control channel in the downstream frame.

Abstract: The radio commutation terminal (200) receives an AAS-DLFP which is transmitted by using a specific region and is associated with the control information, when the control information transmitted by using a map region is cannot toe received. The radio communication terminal (200) transmits a ranging code to a radio base station (100) to notify the reception of the AAS-DLFP, when the AAS-DLFP is received. The radio base station (100) transmits a private map for the radio communication terminal (200) to the radio communication terminal (200) toy a directional beam, when the ranging code is received from the radio communication terminal (200).