NETWORK COMMUNICATION SYSTEM FOR IDENTIFYING IMPERSONATION OF VoIP COMMUNICATION TERMINAL UNDER MANAGEMENT OF WIRELESS LAN

摘要

PROBLEM TO BE SOLVED: To prevent an illegitimate access caused by impersonation in VoIP communication under the management of a wireless LAN. SOLUTION: A caller side wireless VoIP terminal 1 transmits a SIP URL and SS ID as the position information of the terminal to a call agent 3 in the case of executing a call connection procedure to the call agent 3 via an access point 2. A position information registration server 4 registers the SIP URL and the SS ID from the wireless VoIP terminal 1 transferred from the call agent 3 to a position information database 8 by corresponding the SIP URL and the SS ID to each other. When data whose SIP URL is the same as that of data stored in the position information database 8 and whose SS ID differs from that of data stored in the position information database 8 exist in the position information database 8, the server 4 sets check information to ON and updates the SS ID. The position information registration server 4 informs a user terminal 11 possessed by a user of the wireless VoIP terminal 1 about movement of the wireless VoIP terminal 1 by means of voice communication or electronic mail. COPYRIGHT: (C)2004,JPO&NCIPI