| A novel MAC mechanism to resolve 802.11 performance anomaly |
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| 引用本文： | CHENG Yan-hong LI Zhi-shu XING Jian-chuan ZHU Li. A novel MAC mechanism to resolve 802.11 performance anomaly[J]. 浙江大学学报(A卷英文版), 2007, 8(10): 1573-1583. DOI: 10.1631/jzus.2007.A1573 |
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| 作者姓名： | CHENG Yan-hong LI Zhi-shu XING Jian-chuan ZHU Li |
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| 作者单位： | School of Computer Science，Sichuan University，Chengdu 610065，China |
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| 基金项目： | 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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| 摘 要： | 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 prob- ability 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 im- provement in the aggregate throughput and the fairness.
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| 关 键 词： | WLAN 传输可行性 性能不规则性 无线通信 |
| 收稿时间： | 2007-03-26 |
| 修稿时间： | 2007-06-11 |
A novel MAC mechanism to resolve 802.11 performance anomaly |
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| 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, 2007, 8(10): 1573-1583. DOI: 10.1631/jzus.2007.A1573 |
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| Authors: | Cheng Yan-hong Li Zhi-shu Xing Jian-chuan Zhu Li |
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| Affiliation: | (1) 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 prob- ability 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 im- provement in the aggregate throughput and the fairness. |
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| Keywords: | IEEE 802.11 WLAN Transmission probability Performance anomaly |
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