An evaluation mechanism based route optimization in HMIPv6

HMIPv6(Hierarchical Mobile IPv6) adopts hierarchical architecture to manage the communication between mobile node(MN) and correspondent node(CN) by introducing a mobility anchor point(MAP) so that it may greatly reduce signaling cost during MN movement. However, it also brings about some new problems, one of which is the issue of the route. When a MN moves to some special location, there maybe exists a situation that it communicates with a CN through a long route. In this paper, we propose an evaluation mechanism based route optimization in HMIPv6, which introduces an evaluation function to compare the total overhead between the non-optimization route and optimization route. According to the value of the function, it is determined whether the route optimization is initiated. The simulation result shows that the scheme is feasible and efficient.