基于端到端的单播层析网络时延分布  

End-to-End Unicast Tomography Inference Network Delay Distribution

作　　者：范献国[1] 黎文伟[1] 

机构地区：[1]湖南大学软件学院,长沙410082

出　　处：《计算机系统应用》2011年第11期181-184,共4页Computer Systems & Applications

基　　金：国家自然基金(60703097)

摘　　要：推断网络内部各链路的特性,已成为管理和评估大型电信网络的重要条件。通过某个特定路径直接监测每个链路是不现实的,所以一般通过发送端到端的探测包,利用网络的终端节点来收集网络链路的特征信息。通过单播探测包方法来推断链路的时延特性。针对网络内部链路时延累积量生成函数(CGF),提出一种基于端到端的单播探测包时延测量的偏差校正估计法。通过仿真,所提出的方法获得的链路延迟特性与直接测量所得的链路延迟特性相比,具有更小的均方误差。Inference of network internal link statistics has become an important condition for operating and evaluating large-scale telecommunication networks. Since it is not realistic to directly monitor each link along some specific path, so end-to-end probes are used to collect the network link statistics at terminal nodes of the network. This paper uses an unicast probing method to infer the link delay statistics. This paper proposes a bias corrected estimator for the internal link delay cumulant generating function （CGF） based on unicast probe end-to-end delay measurements. This paper shows that the proposed estimator obtains the smaller mean square error comparable to link delay CGF estimates obtaines from directly measured link delay statistics.

关 键 词：网络 单播 层析 时延分布 

分 类 号：TP393.06[自动化与计算机技术—计算机应用技术]