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Spatial reuse and fairness of mobile ad-hoc networks with channel-aware CSMA protocols

Yuchul Kim 1 François Baccelli 1, 2, 3 Gustavo Veciana 1
3 DYOGENE - Dynamics of Geometric Networks
DI-ENS - Département d'informatique de l'École normale supérieure, Inria Paris-Rocquencourt, CNRS - Centre National de la Recherche Scientifique : UMR8548
Abstract : We investigate the benefits of channel-aware (opportunistic) scheduling of transmissions in ad-hoc networks. The key challenge in optimizing the performance of such systems is finding a good compromise among three interdependent quantities, the density and channel quality of the scheduled transmitters, and the resulting interference at receivers. We propose two new channel-aware slotted CSMA protocols: opportunistic CSMA (O-CSMA) and quantile-based CSMA (QT-CSMA) and develop stochastic geometric models allowing us to quantify their performance in terms of spatial reuse and spatial fairness. When properly optimized these protocols offer substantial improvements in terms of both of these metrics relative to CSMA - particularly when the density of nodes is moderate to high. Moreover, we show that a simple version of QT-CSMA can achieve robust performance gains without requiring careful parameter optimization. The paper supports the case that the benefits associated with channel-aware scheduling in ad hoc networks, as in centralized base station scenarios, might far outweigh the associated overhead, and this can be done robustly using a QT-CSMA like protocol.
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Submitted on : Saturday, February 1, 2014 - 6:44:59 PM
Last modification on : Tuesday, September 22, 2020 - 3:45:37 AM


  • HAL Id : hal-00940562, version 1


Yuchul Kim, François Baccelli, Gustavo Veciana. Spatial reuse and fairness of mobile ad-hoc networks with channel-aware CSMA protocols. WiOpt 2011 - 9th International Symposium on Modeling and Optimization in Mobile, Ad-Hoc and Wireless Networks, May 2011, Princeton, NJ, United States. pp.360-365. ⟨hal-00940562⟩



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