Optimal tradeoff between exposed and hidden nodes in large wireless networks

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2 Citations (Scopus)

Abstract

Wireless networks equipped with the CSMA protocol are subject to collisions due to interference. For a given interference range we investigate the tradeoff between collisions (hidden nodes) and unused capacity (exposed nodes). We show that the sensing range that maximizes throughput critically depends on the activation rate of nodes. For infinite line networks, we prove the existence of a threshold: When the activation rate is below this threshold the optimal sensing range is small (to maximize spatial reuse). When the activation rate is above the threshold the optimal sensing range is just large enough to preclude all collisions. Simulations suggest that this threshold policy extends to more complex linear and non-linear topologies.
Original languageEnglish
Title of host publicationProceedings of the International Conference on Measurements and Modeling of Computer Systems (SIGMETRICS 2010, New York NY, USA, June 14-18, 2010)
Pages179-190
DOIs
Publication statusPublished - 2010

Publication series

NameACM SIGMETRICS Performance Evaluation Review
Volume38(1)
ISSN (Print)0163-5999

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