Wireless Internet access of the visited mobile ISP subscriber on GPRS/UMTS network

In this paper we illustrate how the visited mobile ISP subscriber can access home ISP via Gateway GPRS Support Node (GGSN) on GPRS/UMTS network. We showed wireless Internet access model for visited ISP subscriber using dynamic IP in home ISP based on GPRS network, and there were core network testbed and protocol stack, information flow, operation, and parameters of signaling messages for wireless Internet access of visiting ISP subscriber. We implemented SGSN, GGSN, and ISP servers such as RADIUS, Web server, DHCP for simulation and simulated GPRS functions, Internet services, and performance of IP-in-IP between GGSN and ISP web server using our core network testbed with RAN simulator. We also propose some implementation ideas for wireless Internet access of visited ISP subscriber using dynamic IP in home ISP based on GPRS/UMTS network. Index Terms--Wireless Internet Access, GGSN (Gateway GPRS Support Node), GPRS (General Packet Radio Service), UMTS (Universal Mobile Telecommunications Systems), ISP (Internet Service Provider).