Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Mobility between 3GPP-Wireless Local Area Network (WLAN) interworking and 3GPP systems (V13.0.0; 3GPP TS 23.327 version 13.0.0 Release 13)
This document specifies the stage 2 system description for providing mobility between 3GPP Wireless Local Area Network Interworking (I-WLAN) and 3GPP Systems. It is to define a technical solution based on the working principles of DSMIPv6 (see RFC 5555 [7]) with necessary enhancement of the I-WLAN architecture for supporting mobility and roaming between 3GPP-WLAN Interworking system and 3GPP Systems so that ongoing 3GPP PS based services can be maintained with minimal impact on the end-user's perceived quality on the services at a change of the access network (between I-WLAN and 3GPP Access Systems. The specification includes both non-roaming and roaming scenarios and covers all aspects@ including mobility between 3GPP Systems and I-WLAN with access authentication and charging.