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Spatial CSMA: A Distributed Scheduling Algorithm for the SIR Model with Time-varying Channels
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Paper
Spatial CSMA: A Distributed Scheduling Algorithm for the SIR Model with Time-varying Channels
2015
Overview
Recent work has shown that adaptive CSMA algorithms can achieve throughput optimality. However, these adaptive CSMA algorithms assume a rather simplistic model for the wireless medium. Specifically, the interference is typically modelled by a conflict graph, and the channels are assumed to be static. In this work, we propose a distributed and adaptive CSMA algorithm under a more realistic signal-to-interference ratio (SIR) based interference model, with time-varying channels. We prove that our algorithm is throughput optimal under this generalized model. Further, we augment our proposed algorithm by using a parallel update technique. Numerical results show that our algorithm outperforms the conflict graph based algorithms, in terms of supportable throughput and the rate of convergence to steady-state.
Publisher
Cornell University Library, arXiv.org
Subject
