Abstract:

To support a subnet moving in the IPv4 environment, a roaming subnet supported mobile IP protocol (MIP-RS) is proposed by avoiding shortcomings of the mobile IP. In MIP-RS, STA/AP works as a gateway instead of as a MAC device. It is implemented by cooperation between the home agent, the foreign agent, and the intra-domain routing agent. Distance of the node in a mobile subnet from the HA-FA tunnel’s exit can be multi-hops, while it is only one-hop in the mobile IP. A demo system including the special STA/AP was developed to verify MIP-RS. Test results show that MIP-RS can provide high speed data transmission during the subnet moving at the vehicle speed.

Key words: mobile communication, roaming, mobile IP protocol, agent, tunnel