Digital communication system with multiple application priorities

摘要

A time slot for a connection request sent from a mobile station (102) includes a mobile station ID and an application discrimination word of the application for which the mobile station requests the connection. By referring to a database, a base station 104 assigns a message data channel MDC preferentially to a mobile station issuing a connection request for calling a high priority application. The base station monitors the MDCs used for ongoing communications. If an MDC assigned to a mobile station does not satisfy a predetermined radio communication quality, other MDCs for lower priority applications are freed and reassigned to the mobile station. A plurality of MDCs including the reassigned MDCs into which the same contents are encapsulated are transmitted to the mobile station.