METHOD AND DEVICE FOR DISCRIMINATING WHETHER OR NOT RADIO STATION IS IN OPERATION WITHIN PRESCRIBED GEOGRAPHICAL RANGE

PROBLEM TO BE SOLVED: To provide a technology that discriminates whether or not a radio station is in operation within a prescribed geographical position especially in radio communication. SOLUTION: This method and system discriminate whether or not a radio station is in operation within a prescribed geographical position. The method consists of a step where pilot signals are received from plural base stations, a step where a mobile station calculates the time delay between an actual reception time and an estimated reception time of the pilot signals from at least two base stations, a step where the calculated time delay is compared with the time delay stored in advance and a step where it is discriminated that the mobile station is in operation within the prescribed geographical range when the calculated time delay is within the prescribed permissible difference of the stored time delay in advance.