Patent ID: 7328014
Filing Date: 2008-02-05
Classification: H04L,H04W

Abstract:
1. A communication system comprising: a home network installed with a home agent for holding mobile terminal location information of a mobile terminal, the mobile terminal using a first home address in the home network; a visited network installed with a radio communications device for communicating with a mobile terminal; and gateway equipment in said visited network for forming an interface with said home network, wherein said radio communication device contains an access request transfer means for forwarding access requests from said mobile terminal having moved to the visited network to said gateway equipment, wherein said gateway equipment comprises: a prefix request means for requesting a prefix for said mobile terminal having moved to the visited network from said home agent in response to an access request from said mobile terminal having moved to the visited network, and a prefix transfer means for receiving the requested prefix from said home agent and forwarding the received prefix to said mobile terminal having moved to the visited network, and wherein the prefix is used, by said mobile terminal, to generate a second home address of said mobile terminal having moved to the visited network, wherein along with making a prefix acquisition request, said prefix request means also requests acquisition of Domain Name Server (DNS) server information from said home agent, and wherein said prefix transfer means forwards the acquired DNS server information along with said prefix to said mobile terminal having moved to the visited network.