RADIO COMMUNICATION ZONE CLOSING CONTROL SYSTEM

PURPOSE:To enable a new calling by a zone present in a specific mobile station, specific channel of adjacent zones, and the same channel, through the release of closing of zones other than a zone present in the specific mobile station at emergency. CONSTITUTION:At zone closing state, a train 202 is present in a zone E and a radio line is constituted with a control station through any specific channel, then the specific channel at zones A-K and the same channel are closed, and the calling of the channel of trains 202, 203 is impossible. At emergency, the train 202 as a specific mobile station is present, and the zone E during constitution of a radio line with the specific channel is excluded and the closing of the zones for other zones is released. The calling with the same channel can be made from the trains 202, 203 and sufficient service to the calling rapidly increasing at emergency can be made.