PACKET TRANSFER METHOD IN HIERARCHICAL PACKET NETWORK, HIERARCHICAL PACKET COMMUNICATION SYSTEM, GATE NODE AND EDGE NODE AND MOBILE TERMINAL USED FOR THE SAME SYSTEM, AND HANDOVER METHOD AND ROUTING NODE IN PACKET NETWORK

摘要

PROBLEM TO BE SOLVED: To realize high speed handover and route optimization free from limitations on a packet transfer route in a packet communication system. SOLUTION: A gate node 21b reports the current position information of a mobile terminal 3a managed by the gate node 21b itself to an edge node (called 'communicating edge node') (EN '3'), which routes a packet destined for the mobile terminal 3a to the gate node as cache information, and the communicating edge node (EN '3') executes routing of the packet destined for the mobile terminal 3 to a resident edge node (EN '4'), based on the reported cache information in place of the gate node 21b.