Patent ID: 7218634

Claim:
A method for registration of a mobile node on a packet-based communication network comprising the steps of: requesting a care-off address for a mobile node by transmitting a request message to a first node on a first network, said first node capable of assigning a unique care-of addresses to each of a plurality of mobile nodes connecting to said first network; receiving a care-of address for said mobile node at a home network under a first circumstance from the first network, wherein said care-of address is an expanded address identifying the network address location for said mobile node on the first network, and said care-of address is included in an information packet that comprises a source address data field containing the expanded address for the source node transmitting data in the information packet, a destination address data field containing the expanded address for the intended destination node ultimately receiving the data, and a payload data field containing the data transmitted from the source node to the destination node; routing a message acknowledging receiving said care-of address to said first network; allocating a node on the home network to forward information packets to the mobile node at the care-of address using a binding message transmitted on the first network to said node on the home network; and updating a plurality of nodes with the mobile node registration address on the home network with said care-of address.