Dynamic home agent reassignment in Mobile IP

Under conventional Mobile IP, all traffic to a MN is tunneled to the current foreign agent (FA) from the remote HA, which can result in poor efficiency. A dynamic home agent (HA) reassignment model is proposed in this paper to reduce both the signaling traffic and the data traffic to the home network. Simultaneous bindings with two or more HA are supported in our model to provide seamless HA handover. Furthermore, the whole dynamic home agent/home address reassignment procedure is completed in a single registration signaling cycle. Hence it minimizes the delay of the (regional) foreign agent (FA) handoff. Finally, the network access identifier (NAI) or full qualified domain name (FQDN) is used instead of the home address to uniquely identify a MN since the home address is no longer permanent.