Design for Interworking between High-speed Portable Internet and Wireless LANs using different AAA protocols

With the rapid growth of wireless technologies, there will be coexistent heterogeneous wireless networks environment within a few years. For example, there may be coexistent current wireless LAN systems based on widely available IEEE 802.11 and a wireless system based on proprietary wireless standard with different AAA mechanisms such as RADIUS and Diameter. In case of being coexistent the heterogeneous wireless networks, it is imperative for each wireless system to be backwardly compatible with other wireless systems and to be smoothly roamed. First of all, in order to provide wireless Internet service for users who move to other wireless network, users should be either authenticated or, authorized or, both. Accordingly, we propose a scheme being capable of interworking between heterogeneous wireless networks with different AAA mechanisms in the viewpoint of 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 networks. Key-Words: Wireless Local Area Network (LAN), High-speed Portable Internet (HPi), interworking, authentication, RADIUS, Diameter