Ad Hoc Probe: Path Capacity Probing in Wireless Ad Hoc Networks

Authors:
Ling-Jyh Chen;Tony Sun;Guang Yang;M. Y. Sanadidi;Mario Gerla
Affiliations:
University of California, Los Angeles;University of California, Los Angeles;University of California, Los Angeles;University of California, Los Angeles;University of California, Los Angeles
Venue:
WICON '05 Proceedings of the First International Conference on Wireless Internet
Year:
2005

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Abstract

Knowledge of end-to-end path capacity is useful for video/audiostream adaptation, rate control and overlay design. Capacityestimation in wired and last-hop wireless networks has beenextensively investigated, but an in-depth study of path capacity inad hoc, multihop wireless networks is still lacking. Since the "capacity"of a wireless link can vary dynamically and rapidly due to changes in interference, mobility or energy optimization policy, timely path capacitytracking is the key to efficient routing, traffic management and applicationdeployment. In this paper, we present Ad Hoc Probe, a "packet-pair"based technique, to estimate end-to-end path capacity in ad hocwireless networks. Using analysis and simulation, we show thatAd Hoc Probe converges fast and thus works well in mobile, rapidly changing scenarios. Ad Hoc Probe is simpler, faster and less intrusive than previously proposed schemes.