Title :
DHARMA: distributed home agent for robust mobile access
Author :
Mao, Yun ; Knutsson, Björn ; Lu, Honghui ; Smith, Jonathan M.
Author_Institution :
Dept. of Comput. & Inf. Sci., Pennsylvania Univ., Philadelphia, PA, USA
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 information 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.
Keywords :
computer network management; mobile agents; mobile computing; telecommunication network routing; transport protocols; DHARMA; PlanetLab overlay network; TCP application; cross-layer information sharing; distributed home agent; location-optimized instance; mobile IP; mobile wireless devices; multiple wireless link; network management; network routing; robust mobile access; Circuits; DH-HEMTs; Delay; Internet; Personal digital assistants; Portable computers; Robustness; Routing; Space exploration; TCPIP;
Conference_Titel :
INFOCOM 2005. 24th Annual Joint Conference of the IEEE Computer and Communications Societies. Proceedings IEEE
Print_ISBN :
0-7803-8968-9
DOI :
10.1109/INFCOM.2005.1498346
