Patent ID: 8774049

Claim:
A method for use in a Proxy Mobile IP network in which a Mobile Node accesses the Proxy Mobile IP network via a plurality of Mobile Access Gateways, the Mobile Access Gateways arranged to handle mobility signalling on behalf of the Mobile Node, the method comprising: at a Local Mobility Anchor function, registering a first Care-of-Address associated with the Mobile Node; receiving a request to register a second Care-of-Address associated with the Mobile Node; registering the second Care-of-Address associated with the Mobile Node; sending a request message to one of the plurality of Mobile Access Gateways acting on behalf of the Mobile Node and associated with the first Care-of-Address, the request message instructing the Mobile Access Gateway associated with the first Care-of-Address to check whether the Mobile Node is reachable through the first Care-of-Address; receiving a response message from the Mobile Access Gateway associated with the first Care-of-Address, the response message being triggered by the request message, wherein the response message includes information informing the Local Mobility Anchor function that the Mobile Node can not be reached using the first Care-of-Address; and clearing a cache and stopping caching copies of incoming packets directed to the first Care-of-Address.