| 摘要 |
PURPOSE:To enable the antennas to be replaced while a calling radio channel is being preserved by transmitting/receiving a control signal for stopping or restarting calling monitor between a mobile body terminal equipment and a mobile communication control station in replacing the antennas of the mobile body terminal equipment during calling. CONSTITUTION:In replacing a 1st antenna 2 into a 2nd antenna 3 while the mobile body terminal equipment is busy, when a mobile communication control station 6 receives a calling preservation request signal 7, the station 6 sends a calling preservation request acknowledge signal 8, stops the speech monitoring of a calling radio channel and holds the calling radio channel to await the reception of a calling monitoring restart request signal 9 from the mobile terminal set 1. The removal of the 1st antenna 2 of the mobile terminal equipment 1 receiving the calling preservation request acknowledge signal 8 is made possible while the calling radio channel is reserved and the 1st antenna 2 is replaced into the 2nd antenna 3. |
