| 摘要 |
PURPOSE: To provide a method for selecting a mobile station with which correctness can be simultaneously confirmed concerning plural mobile stations by transmitting a certificate request to all the mobile stations transmitting incoming call receiving/ transmitting requests with in specified time difference. CONSTITUTION: When mobile stations 1 and 2 deal with incoming call receptions 5 and 6 within prescribed time difference (t) with respect to a call incoming request 4 transmitted by communication control equipment 3, the communication control equipment 3 temporarily accepts the call incoming receptions 5 and 6 concerning the mobile stations 1 and 2, certificate requests 7 and 7' are successively transmitted from the communication control equipment 3 to the mobile stations 1 and 2, and call connection is continued to the mobile station 1 that performs a correct certificate response 9' to those certificate requests 7 and 7'. Concerning the incoming call receiving/transmitting request from the authenticated mobile station 1, even when the incoming call receiving/transmitting request from the unauthenticated mobile station 2 is previously received by the communication control equipment 3, the authenticated mobile station can finally originates/terminates a call and the communication of the authenticated mobile station can be prevented from being disturbed by the existence of the unauthenticated mobile station. |
