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MobiSys '03 Paper    [MobiSys '03 Tech Program Index]

Pp. 129-144 of the Proceedings
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Host Mobility Using an Internet Indirection Infrastructure

Shelley Zhuang    Kevin Lai    Ion Stoica    Randy Katz    Scott Shenker1
University of California, Berkeley
{shelleyz, laik, istoica, randy}


We propose the Robust Overlay Architecture for Mobility (ROAM) to provide seamless mobility for Internet hosts. ROAM is built on top of the Internet Indirection Infrastructure ($i3$). With $i3$, instead of explicitly sending a packet to a destination, each packet is associated with an identifier. This identifier defines an indirection point in $i3$, and is used by the receiver to obtain the packet.

ROAM takes advantage of end-host ability to control the placement of indirection points in $i3$to provide efficient routing, fast handoff, and preserve location privacy for mobile hosts. In addition, ROAM allows end hosts to move simultaneously, and is as robust as the underlying IP network to node failure. We have developed a user-level prototype system on Linux that provides transparent mobility without modifying applications or the TCP/IP protocol stack. Simulation results show that ROAM's latency can be as low as 0.25-40% of Mobile IP. Experimental results show that with soft handoff the TCP throughput decreases only by 6% when there are as many as 0.25 handoffs per second.

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Next: Introduction
Shelley Zhuang 2003-03-03

This paper was originally published in the Proceedings of the The First International Conference on Mobile Systems, Applications, and Services, May 5 – 8, 2003, San Francisco, CA, USA
Last changed: 01 May 2003 djc
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