Patent ID: 7421512
Filing Date: 2008-09-02
Classification: H04L,H04W

Abstract:
1. A communications system comprising: a mobile node capable of mobility relative to a first network having a plurality of correspondent nodes, a first interfacing node and a second interfacing node, the plurality of correspondent nodes being capable of sending data to the mobile node via the first interfacing node, the mobile node being capable of moving from a first location associated with the first interfacing node of the first network to a second location associated with the second interfacing node of the first network, wherein the system uses multicast routing of data when the mobile node moves from the first location to the second location, the mobile node generates binding update information and delivers the binding update information to a multicast address, the binding update information comprises a forwarding address for the mobile node, the forwarding address having been provided to the mobile node by the second interfacing node and the system includes a multicast service unit which delivers the binding update information by multicast routing to correspondent nodes which have joined the multicast group indicated by the multicast address.