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CLC number: TN92

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Received: 2007-03-26

Revision Accepted: 2007-06-11

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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.10 P.1573~1583


A novel MAC mechanism to resolve 802.11 performance anomaly

Author(s):  CHENG Yan-hong, LI Zhi-shu, XING Jian-chuan, ZHU Li

Affiliation(s):  School of Computer Science, Sichuan University, Chengdu 610065, China

Corresponding email(s):   bjcyh@263.net, Lzshu5@yahoo.com.cn

Key Words:  IEEE 802.11, WLAN, Transmission probability, Performance anomaly

CHENG Yan-hong, LI Zhi-shu, XING Jian-chuan, ZHU Li. A novel MAC mechanism to resolve 802.11 performance anomaly[J]. Journal of Zhejiang University Science A, 2007, 8(10): 1573~1583.

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T1 - A novel MAC mechanism to resolve 802.11 performance anomaly
A1 - CHENG Yan-hong
A1 - LI Zhi-shu
A1 - XING Jian-chuan
A1 - ZHU Li
J0 - Journal of Zhejiang University Science A
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DOI - 10.1631/jzus.2007.A1573

In the 802.11b networks, the guarantee of an equal long-run channel access probability causes performance anomaly in a multi-rate wireless cell. Much interest has been involved in this issue and many effective mechanisms have been proposed. The usual MAC layer solutions include the initial contention window adaptation, the maximum transfer unit size adaptation and the packet bursting. In this paper, we propose a novel approach which introduces a new parameter called the transmission probability pt to the legacy protocol. By adjusting pt according to the transmission rate, the proposed scheme can solve the performance anomaly problem cleanly. Throughput analysis and performance evaluation show that our scheme achieves significant improvement in the aggregate throughput and the fairness.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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