网络瓶颈带宽测量的噪声分析  

A Noise Analysis for Measuring Network Capacity Bottleneck

作　　者：林宇[1] 邬海涛[1] 程时端[1] 王重钢[1] 金跃辉[1] 王文东[1] 

机构地区：[1]北京邮电大学程控交换和通信网国家重点实验室,北京100876

出　　处：《电子学报》2004年第4期552-556,共5页Acta Electronica Sinica

基　　金：国家自然科学基金重大研究计划(No.90204003);国家863项目(No.2003AAl212201;No.2002AA103063)和(No.2001AA121052);高校博士学科点专项科研基金项目(No.20010013003)

摘　　要：包对/串技术通过两个/多个背靠背发送的测量包所经历的散布间隔来估测一条路径的瓶颈带宽.本文分析了瓶颈带宽测量中的噪声特性,解释了在不同测量包长和测量包数情况下测量样点的分布.基于噪声分析的结论,文中提出了一种基于信号模式的滤波算法(MBFA,Model-Based Filtering Algorithm),它利用信号模式/特征来增强信号、过滤噪声.The packet pair/train technique estimates the capacity bottleneck of a path from the dispersion experienced by two/ multiple back-to-back packets. This paper analyzes the measured noise and explains the distributions of measured samples under different probing packet sizes and different packet train lengths. Based on the noise analysis and a ' signal model', a new algorithm called MBFA (Model-Based Filtering Algorithm) is presented,which uses 'signal model' to enlarge the signal and to eliminate the noise.

关 键 词：主动网络测量 带宽检测 容量瓶颈带宽 可用带宽 测量噪声 

分 类 号：TN393.1[电子电信—物理电子学]