Requirements for service continuity between mobile and Wireless Local Area Network (WLAN) networks
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].