POSITION IDENTIFIER MANAGEMENT UNIT AND MOBILE COMPUTER, AND POSITION IDENTIFIER MANAGEMENT METHOD AND POSITION IDENTIFIER PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a position identifier management method by which the redundancy of a management unit at a current position of a mobile computer can be enhanced so as to reduce a protocol overhead. SOLUTION: A mobile node M1 informs a server BA11 in charge of the mobile node M1 about binding information including a compatible node identifier (= virtual mobile warrant general network identifier + node identifier) and a compatible position identifier (= mobile warrant real network identifier in a mobile destination network + node identifier) when the mobile node M1 moves. A mobile node M2 informs a server BA21 about the information. When the node M1 communicates with the node M2 and an end address of a packet addressed to the node M2 is designated by the compatible node identifier, the node M1 acquires the biding information from a binding server BA21 in charge of the node M2 and uses the end address of the packet for the compatible position identifier and transmits the packet by using the end address for the compatible position identifier of its own node.