Research And Implementation Of Mobile IPv6 Testbed

As the fast development of wireless communication technology and enriching functions of mobile terminals, how to enable the mobile terminals to seamlessly and securely roam among heterogeneous and homogeneous networks has become an important research issue. And, Mobile IPv6 (MIPv6) has been widely considered a prominent technology to realize this aim.This paper provides a general test plan and the methods to rapidly establish several kinds of MIPv6 testbed based on the past research on MIPv6 testbed construction methods, performance measurement methods and security issues. Firstly, the design and implementation methods of basic MIPv6 testbed is presented, including the functions of nodes, the topology of network, the protocol stack deamon and the testing software. Also, we have described the hardware design and software tansplantation process of the mobile terminal used as MN in the testbed. Secondly, to solve the issue of large average handover time (AHT) and fluctuation, this paper studies the mechanism of Fast Handover, and realizes a Fast Handover testbed based on the basic one. Thirdly, to optimize the performance of MIPv6 in the scenario of network mobility, this paper also studies the principles and testbed construction method of NEMO (Network Mobility). Fouthly, to address the problems of security introduced by Mobile IPv6, this paper looks into the mechanism of IPsec, and the methods to apply it on the communication between HA and MN in the testbed.Moreover, this paper designs and implements the testing methods for the performance of Mobile IPv6 protocols in the testbedand, including the passive and positive testing methods.It also studies the methods to test the influence of handoff to upper layer applictions.According to the research and experiments above, this paper shows the following results. The AHT in the basic MIPv6 testbed measured by passive method is 3.9s; and that by positive method is 4.4s. By realizing Fast Handover, the AHT has been reduced by 34%, to 2.6s. The AHT of MNN using positive method in the NEMO testbed is 6s. And, the AHT of MN measured by positive method in the basic Mobile IPv6 testbed with IPsec protection between HA and MN increases by 6.8%.