| 摘要 |
A communication bit rate computing unit ( 24 ) computes the cumulative bit rate of downlink communication data, at which a base station communicates with a terminal, and totalizes the bit rates for each sector area. A amplitude/phase control unit ( 23 ) checks whether the cumulative bit rate for each sector area, reported from the communication bit rate computing unit ( 24 ), is higher than a first threshold or lower than a second threshold. If the cumulative bit rate is higher than the first threshold, the amplitude/phase control unit ( 23 ) performs directing characteristic control so as to narrow the area range of the corresponding sector area to a range smaller than a standard area range. If the cumulative bit rate is lower than the second threshold, the amplitude/phase control unit ( 23 ) performs directing characteristic control so as to widen the area range of the corresponding sector area to a range larger than the standard area range.
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