Router supporting network mobility over nested mobile network and a method for tunneling thereof

摘要

A router supporting network mobility over a nested mobile network environment, including: a first interface for data communication with an external node; a second interface for data communication with an internal node; and a controller for controlling routing through at least one of the first and second interfaces, obtaining an address of an end router that is the nearest to an Internet from a mobile network when a present position is found in a node on a nested mobile network, and transmitting through the first interface a binding update message including the address of the end router for tunneling between the end router and a home agent.