The Research For RSVP Based QoS Of Mobile IPv6

In recent years, the tremendous increase in the number of portable computing devices used raised a pressing need for a mobile computing environment. The Internet is rapidly evolving into a global and ubiquitous communication network infrastructure. The addresses of IPv4 will be exhausted in the near future based on the current developing speed of the Internet. To cater for the Internet's rapid development and huge requirements of wireless computing devices, the standard works for IPv6 has been advanced and perfected.On the Internet, the real-time service such as video-on-demand demanding a more advanced technologies and offer increasing higher bit rates. Thus the quality of service in mobile network has been concerned .In these paper, a concept which requires the mobility support scheme to provide a constant flow identity for the application data flow at the network layer regardless of node mobility is introduced, making node mobility completely transparent to network layer flow handing mechanisms. Based on this concept, we propose a flow transparent IPv6 mobile QoS model combined with the existing RSVP protocol. The problem of the existing Mobile IPv6 and RSVP interworking approach is resolved, that is, an end-to-end RSVP renegotiation is incurred each time the mobile nodes handoff from one subnet to another. FT model achieve the seamless QoS provision during handoff without making the protocol more complex.Performance evaluation comparing FT model with the existing rudimental model are conducted with the Network Simulator (ns2). Simulation results demonstrate the ability of FT model to minimize handoff resource reservation delay, handoff packet delay and loss. The paper also analyzed the feasibility of realizing the performance improvement of mobile IPv6 network by combining the MPLS protocol, which is to be developed in the future.