| 基于TCP被动测量的单播网络丢包层析 |
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| 引用本文： | 陈希,董静,隆克平.基于TCP被动测量的单播网络丢包层析[J].重庆邮电学院学报(自然科学版),2007(2). |
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| 作者姓名： | 陈希 董静 隆克平 |
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| 作者单位： | 电子科技大学通信与信息工程学院 成都610054(陈希，隆克平)，重庆邮电大学光互联网及无线信息网络研究中心 重庆400065(董静) |
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| 摘 要： | 在大规模网络中,网络层析通过端到端测量推测网络内部性能,能有效减少网络内部设备之间的协作,因此被广泛应用于网络性能诊断。大多数网络丢包层析都采用主动发送探针的方法,无法准确反映实际网络的性能。为了避免上述局限性,介绍了一种基于TCP监测的被动测量网络丢包层析方法,通过端到端TCP数据流的采样,采用非因果条件概率构造似然函数,并通过EM算法求解最大似然估计推测网络内部丢包率。理论分析表明该方法具有一定的可行性。
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| 关 键 词： | 端到端测量 被动测量 丢包率 单播网络层析 |
Unicast network loss tomography based on TCP passive measurement |
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| CHEN Xi LONG Ke-ping School of Communication and Information Engineering.University of Electronic Science and Technology of China,Chengdu ,P.R.China DONG Jing Research Center for Optical Internet and Mobile Information Networks.Chongqing University of Posts and Telecommunications,Chongqing ,P.R.China.Unicast network loss tomography based on TCP passive measurement[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2007(2). |
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| Authors: | CHEN Xi LONG Ke-ping School of Communication and Information EngineeringUniversity of Electronic Science and Technology of China Chengdu PRChina DONG Jing Research Center for Optical Internet and Mobile Information NetworksChongqing University of Posts and Telecommunications Chongqing PRChina |
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| Institution: | CHEN Xi LONG Ke-ping School of Communication and Information Engineering.University of Electronic Science and Technology of China,Chengdu 610054,P.R.China DONG Jing Research Center for Optical Internet and Mobile Information Networks.Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China |
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| Abstract: | Network tomography is a new technique for the internal behavior of large-scale networks based on end-to- end measurements.It minimizes the cooperation from network elements and has been widely used in characterizing the performance of a large-scale network.Most network loss tomography methods utilized active probing,but the performance obtained from probes is not equal to the reflection of actual network.In this paper,an alternative net- work loss tomography based on TCP monitoring and anti-causal conditional probability is introduced to avoid these limitations.And EM algorithm is used to compute maximum likelihood estimates of internal loss rates.Theoretical analysis demonstrates the feasibility of this method. |
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| Keywords: | end-to-end measurement passive measurement packet loss rate unicast network tomography |
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