| 摘要 |
PURPOSE:To increase economically the number of talking circuits, by installing plural directional antennas at a radio station and allotting a circuit to each section of antenna direction. CONSTITUTION:In case the number of radio frequency circuits is increased owing to a traffic increment, etc. at a service zone of a radio station BS1, the directional antennas are set at zones A and B of the station BS1 without installing a new radio station. The different radio frequencies are set between directions of zones A and B of each directional antenna, and at the same time the repeating line between the station BS1 and a mobile exchange station MTSO is controlled as if it were between different radio stations. Then it is supposed that a traveling object MB moves to zone A from zone B under a busy move via an antenna B, for example. Then the station MTSO measures the electric field intensity sent from each radio station, and it is decided that the object MB is moving to zone A from zone B. Then the circuit is switched to a radio talking circuit via an antenna A. |
