| 摘要 |
PURPOSE:To obtain a wide service area for a mobile station by setting automatically the direction of a directional antenna at a base station by a location designation signal from a terminal station or the mobile station to use effectively the directional antenna. CONSTITUTION:The location designating signal from the terminal station or the mobile station is transmitted on a radio wave, the base station receives this radio wave by a non-directional antenna 1, and the signal is demodulated by a radio equipment 4 through an antenna switching device 3, and its demodulated output is received by an antenna direction controller 5. The kind of the signal from the terminal station or the mobile station is discriminated by the antenna direction controller storing the kinds, the antenna switching device 3 is switched to a directional antenna 2, an antenna turn table 6 is operated so as to set automatically the directivity of the directional antenna 2 to a direction in which the terminal station or the mobile station exists. When the setting is finished, a call start signal is transmitted from the directional antenna 2 via the antenna direction controller 5 and the radio equipment 4. |
