Efficient 3G/WLAN Interworking Techniques for Seamless Roaming Services with Location-Aware Authentication [chapter]

Minsoo Lee, Gwanyeon Kim, Sehyun Park, Sungik Jun, Jaehoon Nah, Ohyoung Song
2005 Lecture Notes in Computer Science  
This paper proposes novel concepts and architectures for location-aware seamless authentication and roaming in the new interworking system between third-generation (3G) mobile networks and wireless local area networks (WLANs) where local mobility movements (micromobility) are handled together with global movements (macro-mobility). We introduce location as a key context in secure roaming mechanism for context-aware interworking. The fast secure roaming with locationaware authentication is
more » ... ented at an entity called LBS Broker that utilizes the concepts of direction of user and pre-warming zone. We present the interworking techniques with LBS Broker for seamless secure WLAN/3G integration enabling to meet the requirements of the future location-aware service scenarios. Performance evaluation is also presented to demonstrate the effectiveness of the proposed scheme for fast location-aware secure roaming. Le Location Context Transfer for Interdomain Roaming Wr/Wb: This interface carries AAA signaling between the WLAN and the 3G visited or home PLMN in a secure manner Ws/Wc: This interface provides the same functionality as Wr/Wb but runs between a 3G AAA proxy and a 3G AAA server Wn: This interface is used for transporting tunneled user data between the WLAN and the WAG Wx: This reference point provides communication between AAA infrastructure and HSS Wg: An AAA interface between the 3GPP AAA proxy and the WAG for provisioning of routing enforcement functions for authorized users Wo: This is used by a 3GPP AAA server to communicate with the online charging system (OCS) for charging information Wf: The interface between 3GPP AAA server and charging gateway function (CGF)/charging collection function (CCF) for charging Wi: Reference point between the packet data gateway and a packet data network (external public or private ) D′/Gr′: This optional interface is used for exchanging subscription information between the 3G AAA server and the HLR
doi:10.1007/11422778_30 fatcat:rrfmufr2wjepdbptel4ayfd5ju