Universal Mobile Telecommunications System (UMTS); LTE; Requirements for service continuity between mobile and Wireless Local Area Network (WLAN) networks (V13.0.0; 3GPP TR 22.937 version 13.0.0 Release 13)
The present document develops the use cases and requirements for service continuity between a 3GPP network and another network@ which can be: - a TISPAN NGN with an IMS@ accessed by a WLAN. - an ISP accessed via a WLAN Each access network has its own separate security system and the NOs have a commercial agreement for roaming and handover. The present document considers use cases whereby: Editors Note: Text to be added when use cases are agreed The present document also examines the requirements and implications of: - service aspects: maintaining service quality and service continuity@ while roaming between a 3GPP PLMN and an independently-owned WLAN; - security aspects: while roaming between a 3GPP PLMN and a WLAN@ in particular when networks may be independently authenticated. - UICC aspects@ including NAA types@ personalisation and ownership. The present document is related to ongoing standardisation efforts in the following areas: - where the WLAN is an I-WLAN @ requirements for which are described in [3]; - methods for selecting the 3GPP or the non-3GPP access network@ requirements for which are described in [2].