Patent ID: 6862274

Claim:
A system for providing IPv4 and IPv6 inter-networking mobility support, comprising: a mobile node having an address mapper, an IPv4 protocol stack and an IPv6 protocol stack in a network layer thereof; an IPv4 network and an IPv6 network; wherein, when moving from IPv4 to IPv6 networks, the mobile node registered an IPv4 address receives router advertisement packets from an IPv6 router via the IPv6 protocol stack, so as to obtain an IPv6 care-of-address, resolve the IPv6 care-of-address by an IPv4 care-of-address, and obtain an IPv6 address mapping to a home agent of the mobile node, and the address mapper issues an IPv4 message to register the IPv4 care-of-address to the home agent, and makes an association between original registered IPv4 address and the IPv6 care-of-address on the mobile node; and wherein, when moving from IPv6 to IPv4 networks, the mobile node registered an IPv6 address receives agent advertisement messages from a foreign agent via the IPv4 protocol stack, so as to obtain an IPv4 care-of-address, resolve the IPv4 care-of-address by an IPv6 care-of-address, and obtain the new IPv4 address for a home agent of the mobile node, and the address mapper issues an IPv6 message to register and update binding information by the IPv6 care-of-address to the home agent, and makes an association between original registered IPv6 address and the IPv4 care-of-address on the mobile node.