Interworking between High-speed Portable Internet and Existing Wireless LANs using Different AAA Protocols

With the growth of wireless technologies rapidly, there will be coexist heterogeneous wireless LANs environment within a few years. For example, there may be coexist current wireless LAN systems based widely available 802.11 and a wireless LAN system based proprietary wireless LAN standard with different AAA mechanisms such as RADIUS and Diameter. In case of being coexisted the heterogeneous wireless LANs, it is imperative for each wireless LAN system to be backwardly compatible with other wireless LAN systems and to be smoothly roamed. First of all, to provide wireless Internet service for users who move to other wireless LANs, users are to be authenticated only, authorized only or both. Accordingly, we propose a scheme being capable of interworking between heterogeneous wireless LANs with different AAA mechanisms in the viewpoint for user authentication. We design an interworking gateway which performs a role of gateway for the interworking. The scheme presented in this paper makes it easy to develop the interworking gateway for interworking heterogeneous wireless LANs. Key-Words: Wireless LAN, High-speed Portable Internet, Interworking, Authentication, RADIUS, Diameter