A novel MAC mechanism to resolve 802.11 performance anomaly

In the 802.11 b 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 contenti...

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Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2007-10, Vol.8 (10), p.1573-1583
Main Authors: Cheng, Yan-hong, Li, Zhi-shu, Xing, Jian-chuan, Zhu, Li
Format: Article
Language:English
Subjects:
WLAN
传输可行性
性能不规则性
无线通信
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Summary:In the 802.11 b 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 probabilitypt to the legacy protocol. By adjustingpt 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.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.2007.A1573