Research And Simulation On Mobile IP Handover

In recent years, there has been a rapid growth in the need to support moving hosts and moving networks in IPv6-based mobile networks. One of the important challenges in Mobile IPv6 is to provide the better quality of service when mobile nodes move from one domain to another, which is referred to as handover.This article deals with the fast handover problem and the hierarchical handover scheme. In our proposed fast handover scheme, each AR (Access Router) maintains a CoA(Care of Address) pool and generates the new CoA for MN that will move to its domain. At the same time, the binding updates to home agent and correspondent node are to be performed from the time point when the new CoA for MN is known by NAR (New AR). In our proposed hierarchical handover scheme, firstly, we propose a new optimized MD (movement detection) using a cross-layer interaction, it occurs in the link-layer of an AP's protocol stack and is delivered to the network-layer of the AR which has a connection with the AP. Secondly, each AR and each MAP (mobility anchor point) assigns CoA to the MN using a CoA pool. Thirdly, the binding updates to home agent and correspondent node are to be performed from the time point when the new RCoA for MN is known by MAP in the interdomain handover, and the binding update to MAP is to be performed from the time point when the new LCoA for MN is known by AR in the intradomain handover.For the comparison with the existing handover scheme, detailed performance evaluation is performed in the given system architecture. Then, the existing and the proposed handover scheme are implemented on the Network Simulator Version 2. The results indicate that our proposed schemes can lower the handoff latency and packet delay efficiently, and reduce the packet loss greatly. So the handover latency is reduced enough to support the real-time applications and seamless services. Keyword: Mobility IP FHMIPv6 HMIPv6 Time delay...