Patent ID: 7522567
Filing Date: 2009-04-21
Classification: H04W

Abstract:
1. A router supporting network mobility over a nested mobile network environment, comprising: a first interface for data communication with an external node; a second interface for data communication with an internal node; and a controller to control routing through at least one of the first or second interfaces, to obtain 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 to transmit 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, wherein the controller adds to the binding update message a flag indicating a nested state of the mobile network, and wherein the binding update message is not capsulated and not decapsulated in one or more nodes between the end router and the present position on the nested mobile network.