非对称网络单向时延的最小范数估计  

One-way Delay Estimation With Minimum Norm in Asymmetric Network

作　　者：贾巧伶[1] 高勇[1] 

机构地区：[1]四川大学电子信息学院,四川成都610064

出　　处：《通信技术》2012年第5期29-32,共4页Communications Technology

摘　　要：通信组网成为近年来的发展趋势,而单向时延(One-way delay)则是衡量通信组网服务质量的一个重要指标,因此对它的估计是一项非常重要的工作。往返时延(RTT,Round TripTime)通常被用作一种估计方法,但是这种对半分的方法并不能精确估计单向时延。该文给出了在不依赖外部时钟同步的情况下,利用Windows平台下提供的微秒级高精度性能计数器构建实验模型,利用最小范数估计法获得单向时延,它具有高精度、可在线测量和可适用于非对称通信网络的优点。Communication network construction becomes a tendency in recent years and one-way delay is an improt-ant standard for estimating communication network state and service quality.RTT（Round Trip Time）is often used as an approximation of the delay,but it could not accurately evaluate the one-way delay.A new scheme is proposed in this paper,which estimates one-way delay with microsecond high-precision performance counter and obtains the delay expression by using Minimum Norm without the clock synchronization.This algorithm is high in accuracy and on-line in measurement,and thus applicable to asymmetric communication network.

关 键 词：单向时延 最小范数法 非对称通信网络 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]