Feasibility study of mobility between 3GPP-WLAN interworking and 3GPP systems
This TR studies and defines the appropriate solutions 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 solutions should impose minimum changes to the 3GPP PS core network and the terminals as well as the WLAN access.
Within the TR, different mechanisms are described along with their characteristics. A comparison of the pros and cons of the different mechanisms is included.