Integrated AAA System for PLMN-WLAN interworking

In this paper we propose an applicative solution for authentication, authorization and accounting i.e. AAA system for interworking between public land mobile networks (PLMN) and wireless local area networks (WLAN). The developed solution is based on several networks nodes, such as WLAN access controller, WLAN AAA gateway, AAA server, as well as necessary network elements for dynamic allocation of IP addresses and Web-server for user access to the network. WLAN access controller, together with the AAA server, provides access control functionality for WLAN users. WLAN AAA gateway provides charging and billing functionalities for the WLAN service. The integrated AAA system with all network elements gives an efficient solution for PLMN-WLAN internetworking.