Method and system for a low-overhead mobility management protocol in the internet protocol layer

摘要

A network system of Mobile Nodes (MNs) and Access Routers (ARs) for supporting mobile Internet communication is provided. Each AR has a unique IP address and access range in which the ARs communicates data to the MNs. Each MN is associated with a home AR and is identified with an IP address of a current location in a Node Location Table (NLT) associated with the home AR. A Corresponding Node (CN) and a Mobile Node (MN) communicate over the Internet using standard format datagrams. The CN sends a first datagram with a query as to the location of the MN in the data portion of the first datagram. The home AR replies with a second datagram with a query reply containing the current IP address of the MN in the data portion of the second datagram. The CN sends at least a third datagram having a data message protocol as the header protocol type and includes an identification of the MN and communication data for the MN in the data portion of the third datagram. The MN receives the communication data contained in the third datagram via the AR with which the MN is in communication. The method preferably includes the MN sending a datagram, when the MN communicates via an AR which is not its home AR, which includes an identification of the current IP address in its data portion. The home AR receives the MN datagram and uses the data portion thereof to update its NLT.