Unified billing system solution for interworking of mobile networks and wireless LANs

In this paper we present an applicative solution for a billing system for interworking between public land mobile networks and wireless LANs. The integration between two networks is based on the authentication and accounting mechanisms. We have developed WLAN access controller and WLAN billing system, which provide access control as well as charging and billing functionalities for the WLAN service, respectively. The developed solution gives cost-effective and easy-to-deploy PLMN-WLAN interworking scenario