| IEEE 802.11 DCF性能分析及改进 |
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| 引用本文： | 李云,隆克平,吴诗其,陈前斌.IEEE 802.11 DCF性能分析及改进[J].电子学报,2003,31(10):1446-1451. |
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| 作者姓名： | 李云 隆克平 吴诗其 陈前斌 |
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| 作者单位： | 1. ;2. 重庆邮电学院光互联网及无线信息网络研究中心,重庆市 400065; 2. 电子科技大学信息系统研究所,四川成都 610054 |
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| 基金项目： | 国家 8 63重点项目 (No .2 0 0 1AA1 2 0 30 3)，重庆市科委计划项目 (No .D2 0 0 2 35)，重庆邮电学院青年教师基金 (No .A2 0 0 2 2 0 )，重庆市 /信息
产业部重点实验室开放课题基金 (No .M2 0 0 2 0 6) |
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| 摘 要： | 本文通过对IEEE 802.11 DCF的性能分析,发现其在时隙选择概率分布上具有明显的不均匀性,这导致了很高的包碰撞概率.本文给出了一种简单的改进方案——A-DCF.通过理论与仿真比较,证明了A-DCF能有效改进DCF时隙选择概率分布的不均匀性,同时,在不降低系统饱和吞吐量的情况下,A-DCF能明显降低包的碰撞概率,且对网络负荷具有自适应能力.
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| 关 键 词： | 分布协调功能 性能 时隙选择概率分布 碰撞概率 |
| 文章编号： | 0372-2112(2003)10-1446-06 |
| 收稿时间： | 2002-04-01 |
Performance Analysis and Improvement of the IEEE 802.11 DCF |
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| LI Yun ,LONG Ke ping ,WU Shi qi ,CHEN Qian bin.Performance Analysis and Improvement of the IEEE 802.11 DCF[J].Acta Electronica Sinica,2003,31(10):1446-1451. |
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| Authors: | LI Yun LONG Ke ping WU Shi qi CHEN Qian bin |
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| Affiliation: | 1. ,;2. Special Research Centre for Optical Internet & Wireless Information Networks(COIWIN), ChongQing University of Posts & Telecommunications(CQUPT),Chongqing 400065,China; 2. Institute of Information University of Electronic Science and Technology of China Chengdu Sichuan 610054,China |
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| Abstract: | By analyzing the performance of the IEEE 802.11 DCF(Distributed coordination funclion),this paper discovers that the probability distribution of slot selection of the IEEE 802.11 DCF is obviously not uniform.This gives high packet collision probability.For this reason,this paper provides a simple scheme,named A DCF.Through simulation of IEEE 802.11 DCF and A DCF,it proves that A DCF has more uniform probability distribution of slot selection and lower packet collision probability at almost the same saturation throughput.At the same time,A DCF is adaptive to the network load. |
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| Keywords: | distributed coordination function performance probability distribution of slot selection collision probability |
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