Efficient and fair MAC for wireless networks with self-interference cancellation

Nikhil Singh, Dinan Gunawardena, A. Proutière, B. Radunovic, Horia Vlad Balan, P. Key
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引用次数: 147

Abstract

Recent advances in PHY layer design demonstrated efficient self-interference cancellation and full-duplex in a single band. Building a MAC that exploits self-interference cancellation is a challenging task. Links can be scheduled concurrently, but only if they either (i) don't interfere or (ii) allow for self-interference cancellation. Two issues arise: Firstly, it is difficult to construct a schedule that fully exploits the potentials for self-interference cancellation for arbitrary traffic patterns. Secondly, designing an efficient and fair distributed MAC is a daunting task; the issues become even more pronounced when scheduling under the constraints. We propose ContraFlow, a novel MAC that exploits the benefits of self-interference cancellation and increases spatial reuse. We use full-duplex to eliminate hidden terminals, and we rectify decentralized coordination inefficiencies among nodes, thereby improving fairness. Using measurements and simulations we illustrate the performance gains achieved when ContraFlow is used and we obtain both a throughput increase over current systems, as well as a significant improvement in fairness.
有效和公平的MAC无线网络与自干扰消除
物理层设计的最新进展证明了有效的自干扰消除和单频段的全双工。构建一个利用自干扰消除的MAC是一项具有挑战性的任务。链路可以同时调度,但前提是它们要么(i)不干扰,要么(ii)允许自干扰取消。这就产生了两个问题:首先,很难构建一个充分利用任意交通模式的自干扰取消潜力的调度。其次,设计一个高效、公平的分布式MAC是一项艰巨的任务;在约束条件下进行调度时,问题变得更加明显。我们提出了ContraFlow,一种新的MAC,利用自干扰抵消的好处,增加空间重用。采用全双工技术消除了隐藏终端,纠正了节点间分散协调效率低下的问题,提高了公平性。通过测量和模拟,我们展示了使用ContraFlow时所获得的性能收益,并且我们获得了比当前系统更高的吞吐量,以及显着改善的公平性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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