Patent ID: 7483697

Claim:
A mobile node management system comprising a plurality of subnetworks interconnected with each other in a mobile network which offers a packet communication service for mobile nodes each visiting an arbitrary subnetwork, wherein: at least one of the subnetworks includes an access router having a one-hop relationship with at least one of the mobile nodes, the access router is provided with a node management table for holding a care-of-address of the at least one mobile node in a domain of the access router, a binding update table for holding a care-of-address of each correspondent node of the at least one mobile node in the domain, and a home agent surrogate means for receiving packets sent from the at least one mobile node in the domain to a correspondent node to forward the packets to the correspondent node after replacing their destination address with the care-of-address of the correspondent node and receiving packets sent to the at least one mobile node in the domain to forward the packets to the at least one mobile node, the node management table has a configuration to maintain a combination of a Network Address Identifier (NAI) or Uniform Resource Identifier (URI) and care-of-address of said at least one mobile node in the domain of the access router, the binding update table has a configuration to maintain a combination of the NAI or URI and care-of-address of each correspondent node, and the NAJ or URI of the correspondent node is set as a destination address of the packets sent from the mobile node to the correspondent node.