Patent ID: 7835324
Filing Date: 2010-11-16
Classification: H04L,H04W,Y02D

Abstract:
1. A method for reducing allocated resource duplication in an Internet Protocol (IP) session by triggering the release of Packet Data Serving Node (PDSN) resources allocated for use with a Mobile Station (MS) when the MS moves to a physical location requiring service by a different PDSN, the method comprising: identifying at a Home Authentication, Authorization and Accounting (HAAA) facility that the MS has moved from a physical location served by a first PDSN to a physical location served by a second PDSN, the MS having transitioned to a dormant state prior to moving to the physical location served by the second PDSN and prior to an expiration of a system metric of the first PDSN; and in response thereto, sending a message to the first PDSN authorizing release of resources in the first PDSN previously used to support the mobile IP session for the MS while in the dormant state, wherein the message to the first PDSN is first sent to the second PDSN which sends, in response thereto, a message to the first PDSN to trigger the release of resources at the first PDSN no longer needed to support the MS.