Departmental Papers (CIS)
Date of this Version
March 2005
Document Type
Conference Paper
Recommended Citation
Yun Mao, Björn Knutsson, Honghui Lu, and Jonathan M. Smith, "DHARMA: Distributed Home Agent for Robust Mobile Access", . March 2005.
Abstract
Mobile wireless devices have intermittent connectivity, sometimes intentional. This is a problem for conventional Mobile IP, beyond its well-known routing inefficiencies and deployment issues.
DHARMA selects a location-optimized instance from a distributed set of home agents to minimize routing overheads; set management and optimization are done using the PlanetLab overlay network. DHARMA's session support overcomes both transitions between home agent instances and intermittent connectivity. Cross-layer infomation sharing between the session layer and the overlay network are used to exploit multiple wireless links when available.
The DHARMA prototype supports intermittently connected legacy TCP applications in a variety of scenarios and is largely portable across host operating systems. Experiments with DHARMA deployed on more than 200 PlanetLab nodes demonstrate routing performance consistently better than that for best-case Mobile IP.
Date Posted: 25 February 2006
Comments
Copyright 2005 IEEE. Reprinted from Proceedings of the 24th Annual Joint Conference of the IEEE Computer and Communications Societies 2005 (INFOCOM 2005), Volume 2, pages 1196-1206.
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