METHOD FOR CONNECTING EMERGENCY CALL, RADIO BASE STATION AND MOBILE TERMINAL IN MOBILE OBJECT COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To make it possible to connect an emergency call even when there is no free calling slot on a radio line in a mobile object communication system. SOLUTION: It is supposed that an emergency call is originated from a mobile terminal 10d when all calling slots S1 to S3 on a radio line are being used by mobile terminals 101a to 101c. When the emergency call is sent from the terminals 101d to a radio base station 102 in the state, the station 102 allocates a slot S4 being used as a controlling slot to a calling slot for the emergency call of the terminal 101d. Thereby even when an emergency call is originated to a police station/firehouse, the emergency call can be connected. Even when handover to another radio base station is executed due to an unstable radio state during the calling of the terminal 101d by the emergency call, the radio base station receiving the handover can specify the controlling slot as a calling slot for the emergency call.