Patent ID: 7545766
Filing Date: 2009-06-09
Classification: H04L,H04W

Abstract:
1. A packet-based wireless communication system, comprising: a home network coupled to a home agent associated with a mobile node, the home network having a communication link to a foreign network coupled to a foreign agent, said mobile node being coupled by a wireless communication link to the foreign agent, said foreign agent supporting routing information packet transmissions between the mobile node and the home network; the foreign agent being adapted to receive a first registration request message transmitted from the mobile node to the foreign agent containing a first identifier code and a first challenge code, which results in the mobile node being placed in a registered state with the foreign agent; and the foreign agent being adapted to receive a second registration request message transmitted from the mobile node to the foreign agent containing a second challenge code and a second identifier code after receiving an interim registration request message from the mobile node containing the second challenge code and an interim identifier code, said foreign agent being adapted to accept the second registration request message if the second identifier code is not equal to the first identifier code or the interim identifier code and the second challenge code is a current or previously valid challenge code.