Research On Mobile IP Handoff Technology

At present, the basic framework of Mobile IP protocol has been formed, but there are still a lot of problems, mobile switching technology is the main domain in mobile IP researching, this paper mainly researched MIPv4 and MIPv6 handoff delay issue, focusing on mobile IPv6, FMIPv6 optimization scheme, and analyze performance of the simulation.In this paper, the research work includes:(1) Deeply studying low-latency switching for Mobile IPv4. First, analyzes the causes of latency, put forward optimization ideas, analyzing the performance. Then show the specific implementation:pre-switching and after-switching technology.①Pre-registration achieved in the old L2 connection has not yet broken when it began L3 registration.②The registration of mobile node (MN) delays L3 switch, continue to use its original anchor foreign agent (aFA), it is a very good solution to the problem of latency and packet loss. Finally it provides a comprehensive program of joint switching, and the advantages disadvantages of three options for analysis. Focus on hierarchical mobile IPv6 fast-switching optimization solutions.(2) First, analyze the main reason for the standard IPv6 switching problems and the delays, deeply studying FMIPv6 and HMIPv6 solution.①FMIPv6 implements MN launched CoA after the switch, reducing the latency of MN associated with the CoA configuration, meanwhile establishing L2 tunnel lower packet loss that is resulting from' switching.②HMIPv6 proposed mobile anchor node (MAP) concept for micro-mobility, so that when MN is only switching in MAP domain, without registration each time between the home agent (HA) and other kind of communication nodes, which cause a high degree of reduced signaling cost and registration latency.Then this paper proposes F-HMIPv6 (Fast Hierarchical Mobile IPv6 Switching) optimization solution. It includes the advantages of the former two solutions. By replacing the previous access router (PAR) to MAP to quickly switch and establish the tunnel. This method achieves the optimization of the first two programs combination. Then this paper gives analysis for switching delay.(3) Using NS-2 software simulates the optimization solutions for three types of IPv6 switching, giving a detailed implementation process of the simulation, described the data analysis methods of NS-2 software, finally came to the packet loss rate and handoff delay simulation results.