MOBILE IP COMMUNICATION SYSTEM, MOBILE IP COMMUNICATION APPARATUS, AND MOBILE IP COMMUNICATION METHOD

摘要

For a plurality of mobile IP communication apparatuses (access service network gateways) existing in an access service network, it is arranged that their DHCP proxy function parts have a common IP address, thereby enabling all of the DHCP proxy function parts to receive address update messages of all of mobile stations. When a handover of a mobile station causes a relocation of a foreign agent/anchor data path function part to occur, DHCP proxy information of release time and the like of IP address is notified from a mobile IP communication apparatus before the relocation to the DHCP proxy function part of a mobile IP communication apparatus of the relocation destination, thereby enabling the DHCP proxy function part of the relocation destination to continue updating the IP address of the mobile station.;COPYRIGHT KIPO & WIPO 2010