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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (10): 1573-1583    DOI: 10.1631/jzus.2007.A1573
Electrical & Electronic Engineering     
A novel MAC mechanism to resolve 802.11 performance anomaly
CHENG Yan-hong, LI Zhi-shu, XING Jian-chuan, ZHU Li
School of Computer Science, Sichuan University, Chengdu 610065, China
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Abstract  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.

Key words： IEEE 802.11      WLAN      Transmission probability      Performance anomaly     
Received: 26 March 2007     
CLC:  TN92  
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CHENG Yan-hong
LI Zhi-shu
XING Jian-chuan
ZHU Li
Cite this article:

CHENG Yan-hong, LI Zhi-shu, XING Jian-chuan, ZHU Li. A novel MAC mechanism to resolve 802.11 performance anomaly. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(10): 1573-1583.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A1573     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I10/1573

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