Bandwidth allocation by optimal contention window setting for IEEE 802.11 EDCA

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Bandwidth allocation by optimal contention window setting for IEEE 802.11 EDCA

Received:2008-07-16 Revised:1900-01-01 Online:2009-01-01 Published:2009-01-01
Contact: Jian-Bing MAO

IEEE 802.11 EDCA带宽分配控制的竞争窗口优化

毛建兵毛玉明冷甦鹏

电子科技大学电子科技大学电子科技大学

通讯作者: 毛建兵

Abstract

Abstract: IEEE 802.11 Enhanced Distributed Channel Access (EDCA) provides the QoS enhancement to support priority-based service differentiation for different types of traffic. This paper focus onto the problem how to yield the maximum aggregate throughput while maintaining the weighted proportional bandwidth differentiation among different traffic classes by optimal contention window settings. Two approximate computation methods are proposed to acquire the optimal transmitting probability, which is then used to find optimal contention window settings further. Through validation by numeric evaluation and simulation, the results are proved to be very close to the theoretical value, and the optimal contention window settings can effectively optimize the throughput performance of the whole network.

Key words: IEEE 802.11 EDCA, bandwidth allocation, contention window, maximum throughput

摘要： Two approximate computation methods were proposed to acquire the optimal transmitting probability and further to find the optimal contention window setting by analyzing the influence of the priority-based service differentiation of IEEE 802.11 Enhanced Distributed Channel Access (EDCA) on throughput. The optimal contention window setting can help yield the maximum aggregate throughput while maintaining the weighted proportional bandwidth differentiation among different traffic classes. Through validation by numeric evaluation and simulation, the results are proved to be very close to the theoretical value, and the optimal contention window setting can effectively optimize the throughput performance of the whole network.

关键词: IEEE 802.11 EDCA, 带宽分配, 竞争窗口, 最大吞吐量

Jian-Bing MAO Yu-Ming MAO Su-Peng LENG. Bandwidth allocation by optimal contention window setting for IEEE 802.11 EDCA[J]. Journal of Computer Applications.

毛建兵毛玉明冷甦鹏. IEEE 802.11 EDCA带宽分配控制的竞争窗口优化[J]. 计算机应用.

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