| 基于改进Markov模型IEEE802.11b性能分析 |
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| 引用本文： | 高峰,高泽华,张兵,文柳. 基于改进Markov模型IEEE802.11b性能分析[J]. 南京邮电大学学报(自然科学版), 2011, 31(1): 58-64 |
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| 作者姓名： | 高峰 高泽华 张兵 文柳 |
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| 作者单位： | 1. 北京邮电大学,泛网无线通信教育部重点实验室,北京,100876;北京邮电大学,光通信与光电子学教育部重点实验室,北京,100876
2. 北京邮电大学,光通信与光电子学教育部重点实验室,北京,100876 |
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| 摘 要： | IEEE 802.11b理论最高传输速率可达11 Mbit/s,但在实际应用中,发现其IP层数据传输速率远低于此。为了准确评估其数据业务支持能力,对已有基于退避窗口机制的二维Markov模型进行改进,从成帧效率和DCF协议效率两个方面对IEEE 802.11b无线局域网的性能进行了分析,得出饱和条件下系统归一化吞吐率和平均分组时延,并使用NS2进行验证。IEEE 802.11RTS/CTS机制可以改善大数据帧长条件下系统性能,但IEEE 802.11b协议并未给出切换门限建议值。基于上述改进模型,通过理论计算,给出了不同节点数下基本接入模式与RTS/CTS模式切换门限值。
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| 关 键 词： | WLAN IEEE802.11b Markov模型 性能分析 RTS/CTS切换门限值 |
Performance Analysis of 802.11b Based on Improved Markov Model |
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| GAO Feng,GAO Ze-hua,ZHANG Bing,WEN Liu. Performance Analysis of 802.11b Based on Improved Markov Model[J]. JJournal of Nanjing University of Posts and Telecommunications, 2011, 31(1): 58-64 |
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| Authors: | GAO Feng GAO Ze-hua ZHANG Bing WEN Liu |
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| Affiliation: | GAO Feng1,2,GAO Ze-hua1,ZHANG Bing2,WEN Liu2 1.Key Laboratory of Universal Wireless Communication,Beijing University of Posts and Telecommunications,Beijing 100876,China 2.Key Laboratory of Information Photonics and Optical Communications,China |
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| Abstract: | The theoretical maximum data rate of wireless LAN based on IEEE 802.11b is up to 11Mbit/s.However,in practical applications,we find that the actual user data rate is much lower than that.By use of two-dimension Markovian analysis on the framing efficiency and the DCF efficiency,we provide an extensive throughput performance evaluation of the basic access and the RTS/CTS access mechanisms of IEEE 802.11b.The accuracy of the proposed new model is validated by comparing it with simulation results,with respect ... |
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| Keywords: | WLAN IEEE 802.11b Markov model performance analysis RTS/CTS threshold |
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