| 摘要 |
PURPOSE:To realize a reduction of the control quantity at the radio control station, reduce the number of the wire circuits between the main base station and the control station and furthermore facilitate an extension of the radio zone, by distributing the subordinate radio base station under the control of the main radio base station. CONSTITUTION:When the mobile station M shifts to the zone F1 within the radio zone E1 and under the busy state, the main radio base station C1 switches the radio channel to the subordinate radio base station D1 and at the same time switches the wire circuit from the radio control station 1 to the side of the station D1. Then in case the station M shifts to the zone E2 from F1 under the busy state, the station C1 detects this shift from the reduction of the reception field level to then give the circuit switch request to the station 1. At the station 1 a comparison is given to the field levels between the stations C1 and C2, and the station C2 having a larger level is selected to give an indication to the circuit switching. The transmitter/receiver is actuated at the station C2 to set up the channel, and at the same time the new channel number is indicated to the station M from the station 1 for switching the channel. After this, the swiching of the wire circuit is performed through the automobile telephone exchange station 2. |
