Patent ID: 8189512
Filing Date: 2012-05-29
Classification: H04W

Abstract:
1. A method of routing communications traffic in a Proxy Mobile IP communications network, wherein a Mobile Node is attached to a first Proxy Mobile Agent and an optimized route is established between the Mobile Node and a Corresponding Node via the first Proxy Mobile Agent, and wherein the Mobile Node subsequently detaches from the first Proxy Mobile Agent and attaches to a second Proxy Mobile Agent, the method comprising the steps of: at the first Proxy Mobile Agent, receiving packets sent from the Corresponding Node; forwarding the packets to the Mobile Node and to a Home Agent of the Mobile Node; in the event that the packets are returned to the first Proxy Mobile Agent from the Home Agent, determining that the Mobile Node is attached to the first Proxy Mobile Agent, and in the event that the packets are not returned to the first Proxy Mobile Agent from the Home Agent, determining that the Mobile Node is no longer attached to the first Proxy Mobile Agent; and, as a result of a determination that the Mobile Node is no longer attached to the first Proxy Mobile Agent, sending a request from the first Proxy Mobile Agent to the Corresponding Node to cancel the route optimization.