| 摘要 |
PURPOSE:To switch a radio channel without providing in equipment to perform the transfer of radio channel information between fixed stations mutually, by providing a deciding function for channel switching and sending function of using channel information to a mobile station. CONSTITUTION:A radio circuit control signal modulator/demodulator circuit 14 detects a discriminating signal out of each prescribed channel in a time division multiplex signal as a mobile station 5 moves from a radio circuit zone 10 to 11. Then a reduction of the level of the signal concerning a repeating device 8 and an increment of the level of the discriminating signal fed from a repeating device 9 are detected and transmitted to a circuit characteristic control circuit 16 via a transmission line 17. When the level increment exceeds a specific level, the circuit 16 decides the execution of channel switching. Thus the device 9 sets radio circuits to a master fixed station and the station 5, and the circuit 16 switches the using channel of an audio signal modulator/ demodulator circuit 15. As a result, the channel is switched to the zone 11 from the zone 10. |
