UMTS-WLAN interworking system and authentication method therefor

摘要

A system and method for enabling fast authentication for a UE when a handoff occurs during a service in a UMTS-WLAN interworking network are provided. When the UE moves from the UMTS network to the WLAN or vice versa, it can advantageously reuse authentication information used in the old network for authentication and data encryption in the new network.