Patent ID: 7162529

Claim:
A mobile proxy apparatus including a protocol translator interconnecting a network A conforming to a protocol P and a network B conforming to a protocol Q, the protocol translator having: an address translation function to perform a conversion between an address conforming to the communications protocol P and an address conforming to the communications protocol Q; a detection function to detect a communication conforming to a particular protocol; a format translation function to convert a particular protocol between a format identifiable in the network A and a format identifiable in the network B; and a function to process a communication conforming to a mobile communications protocol; wherein, when a terminal M belonging to the network A moves to the network B, a protocol exchanged between a server H which manages location information of the terminal M in the network A and the terminal M is converted between a format valid in one of the networks and a format valid in the other network and relayed between the networks by using the address translation function and the format translation function, and wherein the mobile proxy apparatus registers a virtual home address and a domain name into a DNS server installed in the network B, the virtual home address and the domain name being recognized by a mobile node in the network B.