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Abstract: Wireless networks equipped with the CSMA protocol are subject to collisionsdue to interference. For a given interference range we investigate the tradeoffbetween collisions hidden nodes and unused capacity exposed nodes. We showthat the sensing range that maximizes throughput critically depends on theactivation rate of nodes. For infinite line networks, we prove the existence ofa threshold: When the activation rate is below this threshold the optimalsensing range is small to maximize spatial reuse. When the activation rate isabove the threshold the optimal sensing range is just large enough to precludeall collisions. Simulations suggest that this threshold policy extends to morecomplex linear and non-linear topologies.



Author: P.M. van de Ven, A.J.E.M. Janssen, J.S.H. van Leeuwaarden

Source: https://arxiv.org/







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