COMMUNICATION CONTROLLER AND RADIO COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To prevent illegal use due to a clone terminal by detecting the presence of the clone terminal. SOLUTION: A response request signal transmitting means 4a transits by radio a response request signal to which the identification code of a subscriber's terminal equipment 1 is added through a base station 3 equivalent to the position of the presence of the subscriber's terminal equipment 1. The subscriber's terminal equipment 1 adds its own identification code to a response signal, and transmits it to a communication controller 4 when its own identification code is added to the response request signal. A judging means 4b of the communication controller 4 judges that an illegal subscriber's terminal equipment (clone terminal) having the identification code of the subscriber's terminal equipment 1 other than the legal subscriber's terminal equipment 1 is present when a plurality of response signals have been received.