一种测量流长度分布的近似方法  

An approximate method for measuring flow length distributions

作　　者：刘卫江[1] 龚俭[2] 

机构地区：[1]大连海事大学信息科学技术学院,辽宁大连116026 [2]东南大学计算机科学与工程学院,南京210096

出　　处：《大连海事大学学报》2009年第2期102-105,共4页Journal of Dalian Maritime University

基　　金：国家"九七三"重点基础研究发展规划项目(2009CB320500);国家自然科学基金资助项目(60873054);中国博士后科学基金资助项目(20080430182)

摘　　要：为提高测量精度并减少所需资源,提出一种近似的测量流长度分布的方法.通过分析产生一个定长原始流的概率分布,并考虑流的重尾特性对其产生的影响,给出了近似测量流长度分布的测量模型.理论分析和实验结果均表明,该方法在使用抽样技术条件下,可以准确对流长度分布作出统计,满足实际测量需要.To improve the measurement accuracy while reducing the resource usage, an approximate method for measuring flow length distributions was developed. The probability distribution model of original flow for a sampled flow of fixed length was analyzed, the effects of heavy-tailed feature of flow were investigated, and a measuring model which approximately measured flow length distribution was given. Theoretical analysis and experiment results both indicate that the method can generate the statistics of the flow length distribution accurately under the condition of using packet sampling, which meet the demands of actual measurement.

关 键 词：抽样报文 IP流 概率 重尾分布 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]