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In this paper we present a highly robust and efficient mobility architecture. ROAM uses an indirection infrastructure ($i3$) that gives end-hosts the ability to control placement of indirection points in the infrastructure. ROAM uses this ability to achieve efficient routing, fast handoff, and preserve location privacy. ROAM is as robust as the underlying IP network, and allows simultaneous mobility while not requiring any changes to the TCP/IP protocol stack.

Simulation results show that ROAM has a low latency stretch and it is highly robust compared to Mobile IP. We evaluate a prototype of ROAM in a small testbed, and preliminary experimental results demonstrate that ROAM provides good support for soft-handoff and frequent mobility. We plan to deploy ROAM on a larger scale with end hosts and $i3$servers spanning the continental US. In addition, we plan to explore using ROAM to compose services [6] such as transcoding and transport protocol optimization for wireless links (e.g., TCP Snoop [36]) that complement mobile routing.

Shelley Zhuang 2003-03-03