Patent ID: 8223725
Filing Date: 2012-07-17
Classification: H04W

Abstract:
1. A method of operating a network entity at an intermediate node between a mobile node in a foreign network and a correspondent node, the method comprising: allocating to the mobile node a care-of address within the foreign network; allocating a secondary care-of address to the network entity; sending a packet, addressed to the correspondent node, wherein the correspondent node has a unique address, from the network entity, wherein the packet has the secondary care-of address as a source address, wherein the packet comprises a binding update, and wherein the binding update comprises an indication of the secondary care-of address; tunnelling, in a session between the correspondent node and the mobile node, one or more session packets from the correspondent node to the network entity, wherein the session packets have the unique correspondent node address as the source address and the secondary care-of address as the destination address; receiving the session packets; decapsulating the session packets; and forwarding the decapsulated session packets to the mobile node.