Patent ID: 8391242
Filing Date: 2013-03-05
Classification: H04W

Abstract:
1. A method for handover of a mobile node between access networks either supporting network-based mobility or not supporting network-based mobility in a packet-switched communication network comprising at least the mobile node, a mobile access gateway, a correspondent node and a mobile node's home agent, the method comprising the steps of: a) performing proxy route optimisation towards the correspondent node on behalf of the mobile node; b) performing handover from a current access network to a target access network; c) determining whether the proxy route optimisation is needed after the handover; d) in the affirmative, determining whether return-routability-based route optimisation or home agent-based route optimisation is to be carried out; e) if return-routability-based route optimisation is to be carried out, sending information regarding the proxy route optimisation to the mobile node by the mobile node's home agent; or f) if home agent-based route optimisation is to be carried out: generating and managing a route optimisation state in the mobile node by the mobile node's home agent; and updating the correspondent node's routing state with the mobile node's new location.