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 p t to the legacy protocol. By adjusting p t 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.
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Project supported by the National Mid-and Small-Scale Enterprise Technical Innovation Fund of China (No. 06C26225101730) and the Sichuan Provincial Key Science and Technology Program, China (No. 05GG021-003-2)
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Cheng, Yh., Li, Zs., Xing, Jc. et al. A novel MAC mechanism to resolve 802.11 performance anomaly. J. Zhejiang Univ. - Sci. A 8, 1573–1583 (2007). https://doi.org/10.1631/jzus.2007.A1573
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DOI: https://doi.org/10.1631/jzus.2007.A1573