Patent ID: 8667182

Claim:
A system for tracking a location of a mobile node when the mobile node moves to a foreign region of a network from a home region of the network, comprising: an address management server in the foreign region, a first locating server in the foreign region and a second locating server in the home region; the address management server in the foreign region configured to receive an address requesting message from the mobile node in the foreign region; allocate a new communication address for the mobile node; generate a binding message containing a user ID of the mobile node and the new communication address of the mobile node in the foreign region; and send the binding message to the first locating server; wherein the new communication address is different from an old communication address allocated to the mobile node for use in the home region; the first locating server configured to receive the binding message; determine based on the user ID of the mobile node that the mobile node belongs to the home region; and send the user ID and the new communication address of the mobile node to the second locating server in the home region; and the second locating server configured to receive the user ID and the new communication address of the mobile node from the first locating server; and store the user ID and the new communication address of the mobile node for responding to inquiries regarding the location of the mobile node.