| 摘要 |
Appropriate AAS control is achieved by a base station having a plurality of antennas for performing a radio communication with the mobile station by employing Time Division Duplex including an assignment unit for assigning a radio resource to the mobile station, a request unit for requesting the mobile station to transmit a reference signal using a reference signal area of an uplink radio resource in the same frequency band as a downlink radio resource, when the uplink radio resource for an uplink communication in the same frequency band as the downlink radio resource for a downlink communication is not assigned to the mobile station by the assignment unit, and a calculation unit for receiving the reference signal and, based on the reference signal, for calculating a weight used for transmitting a radio signal on the downlink communication channel.
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