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Routing Optimization (RO) is an important support for Mobile IPv6 while performing handover. It can reduce the overhead of a home agent and make the traffic more fluent between MN and CN; however, NEtwork MObility (NEMO) in Mobile IPv6 lacks the capability of RO. In this paper, the authors propose an enhanced architecture by deploying Home Agents Location Registration Agents (HALRA) on cellular data switch (3G/B3G) network incorporating with Distributed Home Agents (NEMO-DHA) on NEMO for a Mobility Critical Area. Under this architecture, it can provide less handoff latency on the Mobility Critical Area and make a detour to avoid the perplexed NEMO routing optimization problem.
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