| 摘要 |
PURPOSE:To grasp the accurate present position of a mobile station even after the switching processing of a talking circuit by updating the registered information on the position of the mobile station concurrently with the switching processing of the talking circuit while the mobile station is moving in a busy mode. CONSTITUTION:When the electric field intensity of a radio circuit (a) is continuously deteriorated for a prescribed time, a base station 12 of the highest field intensity is selected for a mobile station 10. Then the switching request information of a talking circuit is sent to the station 12 via a base station 11 and a mobile switchboard 13. Thus the station 12 selects an idle circuit and sends the switching instruction information to the switchboard 13. The switchboard 13 connects a path 19 of an NW 14 to the station 12 to connect a subscriber device 17 to the station 12 and then rewrites the registered information on the position of the station 10 stored in a main memory 16 of the switchboard 13. Then a talking circuit switching instruction is sent to the station 10 via the station 11 and the station 10 switches the circuit (a) to a radio circuit (b). In such a constitution, the present position of the station 10 can be accurately grasped even after the switching processing of the talking circuit.
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