Method and apparatus for use in a communications network

摘要

A method and apparatus for use in a communications network in which a Mobile Node accesses the communications network via a proxy node. The proxy node is arranged to handle mobility signalling on behalf of the Mobile Node. At a mobility anchor function, such as a Local Mobility Anchor, a first Care-of-Address associated with the Mobile Node is registered. When the mobility anchor function receives a registration request to register a second Care-of-Address associated with the Mobile Node, it sends a request message to the proxy node acting on behalf of the Mobile Node. The request message instructs the proxy node to check whether the Mobile Node is reachable using the first Care-of-Address.

主权项

1. 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.