An enhanced mobility management approach for wireless IP networks

Mobile IP (MIP) and mobile IP route optimization (MIP-RO) have been proposed to provide mobility management in the Internet. However, the MIP protocol suffers from triangular routing problem. MIP-RO adopts binding cache to avoid the triangular routing problem and provides smoother handoff. It is very difficult to enforce a binding cache upon each node in the entire Internet. Instead, we developed a more efficient handoff scheme, called mobile routing table (MRT) to enable the edge routers to take over the address binding. Nevertheless, we cannot demand all the edge routers to support MRT in the Internet. Therefore, this paper introduces five different schemes which relieve the limitation of the original MRT approach and cut down the triangular routing problem as much as possible. We analyze and compare both the standard MIP and the proposed approaches. The performance results are reported