| 摘要 |
PROBLEM TO BE SOLVED: To obtain a system with high reliability where the effect of line interruption is reduced and a degree of other communication with a mobile station is ensured, even on the occurrence of the line interruption between a base station and a control station. SOLUTION: In the case that a mobile station 1 sends a call signal to a mobile station 2, a base station 10A receives it and the base station is going to transfer the signal to a control station 30, when a line 40 is faulty and interruption of line connection is detected, a position registration circuit 69 in the base station 10A confirms whether or not the mobile station 2 being a called opposite party is registered. When it is confirmed that the mobile station 2 is resident in a zone of the base station 10, changeover circuits 65, 66 are activated to stop the transfer of a call signal received from the mobile station 1 to the control station 30, the base station 10A transmits the signal to the mobile station 2 of its own base station zone, to allow the mobile station 2 to receive the incoming call. In the case that the line 40 is faulty and the line connection is interrupted, the arrival of the incoming call to the mobile station 2 is impossible in a conventional system, but in this embodiment, since the called destination mobile station 2 exists in its own base station zone, the transfer path is automatically switched, and the incoming call is received. |
