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首页> 外文会议>2013 10th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks >Making 802.11 DCF near-optimal: Design, implementation, and evaluation
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Making 802.11 DCF near-optimal: Design, implementation, and evaluation

机译：使802.11 DCF接近最佳：设计，实施和评估

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摘要

This paper proposes a new wireless MAC protocol called Optimal DCF (O-DCF). O-DCF modifies the rule of adapting CSMA parameters, such as backoff time and transmission length, based on a function of the supply-demand differential captured by the local queue length. O-DCF is fully compatible with 802.11 hardware, so that it can be easily implemented only with a simple device driver update. O-DCF is inspired by the recent theoretical studies on queue-based CSMA for high throughput and fairness. O-DCF effectively bridges the gap between theory and practice, implemented and tested in an off-the-shelf 802.11 chipset. Through extensive simulations and real experiments with a 16-node wireless network testbed, we evaluate the performance of O-DCF and show that it outperforms other competitive ones, such as 802.11 DCF, optimal CSMA, and DiffQ for various scenarios.
机译：本文提出了一种称为最优DCF（O-DCF）的新无线MAC协议。 O-DCF根据本地队列长度捕获的供求差异函数，修改适应CSMA参数（例如退避时间和传输长度）的规则。 O-DCF与802.11硬件完全兼容，因此仅通过简单的设备驱动程序更新即可轻松实现。 O-DCF受到最近基于队列的CSMA的理论研究的启发，以实现高吞吐量和公平性。 O-DCF有效地弥合了理论和实践之间的鸿沟，并在现成的802.11芯片组中进行了测试。通过广泛的仿真和16节点无线网络测试平台的实际实验，我们评估了O-DCF的性能，并表明它在各种情况下都优于其他竞争产品，例如802.11 DCF，最佳CSMA和DiffQ。

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