Optimizing Aggregate Throughput in 802.11 Networks through Balancing Spatial Reuse and Transmission Rate

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference Pub Date : 2009-11-30 DOI:10.1109/GLOCOM.2009.5425931

Junmei Qu, Z. Zhao, Lianfang Zhang, Y. Shu

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引用次数: 1

Abstract

Traditional medium access control (MAC) protocols utilize temporal mechanism to do contention resolution. This paper explores an alternative approach by adapting the space occupied by a transmission to resolve contention. Each successful transmission in a wireless network needs to occupy a certain part of space in which there are no other simultaneous transmissions. The size of the space occupied depends on the transmission rate and it consequently determines the level of spatial reuse. To optimize the aggregate network throughput needs to balance the transmission rate and the level of spatial reuse. This paper firstly derives the optimal transmission rate by analyzing the relationship between the transmission rate and the occupied space size, then a distributed algorithm is proposed to achieve the optimal spatial allocation approximately through tuning the carrier sense threshold and the transmission rate. Simulation results show that, the distributed algorithm works well in balancing the transmission rate and the level of spatial reuse, and the aggregate network throughput can approximate the theoretical one and is higher than that can be gained by other similar algorithms.

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均衡空间复用和传输速率优化802.11网络的总吞吐量

传统的介质访问控制(MAC)协议利用时间机制来解决争用。本文探讨了一种通过调整传输占用的空间来解决争用的替代方法。在无线网络中，每一次成功的传输都需要占用一定的空间，在这个空间中没有其他的同时传输。占用空间的大小取决于传输速率，因此它决定了空间重用的水平。优化网络总吞吐量需要平衡传输速率和空间复用水平。本文首先通过分析传输速率与占用空间大小的关系，推导出最优传输速率，然后提出一种分布式算法，通过调整载波感知阈值和传输速率来近似实现最优空间分配。仿真结果表明，分布式算法能很好地平衡传输速率和空间复用水平，网络总吞吐量接近理论吞吐量，且高于其他类似算法。

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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GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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