Nen-Chung Wang
ABSTRACT
Due to coming of the mobile-commerce, a variety of portable electronic equipment has been produced, including PDA, notebook, and cellular phone, etc. Mobile IP has become an important protocol for providing Internet connectivity to roaming mobile hosts. However, several problems have been found in Mobile IP and need to be solved. One of them is the triangle routing problem, in which all datagrams for a mobile host have to be routed first to the mobile host's home agent and then forwarded by the home agent to the mobile host. These conventional paths are often significantly longer than optimal path. IETF (Internet Engineering Task Force) has proposed route optimization extensions in Mobile IP to solve this problem. However the scheme has difficulties and is almost infeasible, because the scheme needs to implement a binding cache for all mobile hosts and correspondent nodes to solve the triangle routing problem. In this paper, we propose a novel and simple route optimization scheme with IP header extension to solve the triangle routing problem in Mobile IP, and to provide a feasible and efficient Mobile IP service. Finally, we will conduct some simulation to prove that the proposed routing scheme outperforms the standard Mobile IP.
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Index Terms
- A route optimization scheme for mobile IP with IP header extension
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