Patent ID: 7561549
Filing Date: 2009-07-14
Classification: G06Q,H04L,H04W,Y10S

Abstract:
1. An infrastructure node in a hierarchical wireless network, comprising: the infrastructure node configured to establish a unique context transfer key for communicating with each ancestor node in the same branch of the hierarchical network as the infrastructure node; wherein the infrastructure node is directly coupled to not more than one ancestor node; wherein the infrastructure node is further configured to establish a unique context transfer key for communicating with each descendant node coupled to the infrastructure node; wherein the infrastructure node is further configured to store a path identification indicative of a path instance for a descendent node; wherein the infrastructure node is the top node of a subnet tree, the infrastructure node is further configured to cache context information for a mobile node attached to a descendant node of the subnet tree; wherein the infrastructure node is configured to receive a new path identification for a descendent node; wherein the infrastructure node is responsive to receiving the new path identification for the descendent node to send a deregistration request to a former ancestor node of the descendant node; and wherein the infrastructure node is further responsive to update the path identification stored at the infrastructure node with the new path identification.