A location-aware layer 7 proxy handoff mechanism over the mobile network environment

In a server-proxy-client 3-tier architecture of the wireless mobile network, proxies should be dynamically assigned to serve mobile hosts according to geographical dependency and the network situation. The goal of proxy handoff is to allow a mobile host still can receive packets from the corresponding server even though its served proxy is switched from the current one to the other one. A 3-tier multimedia mobile transmission platform, called MMTP, is proposed to solve the proxy handoff problem in the IPv6-based wireless mobile network. In MMTP, a proxy handoff scheme, which is based on the application layer anycast technique, is proposed to select from a number of candidate proxies according to the load balance concern and wireless network situation concern.