基于包对采样的IP网络时延变化测量方法  

An IPDV Measurement Method Based-on Packet-Pair Sampling

作　　者：黎文伟[1] 王俊峰[2] 谢高岗[3] 张大方[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082 [2]电子科学技术大学计算机科学与工程学院,成都610054 [3]中国科学院计算技术研究所信息网络研究室,北京100080

出　　处：《计算机研究与发展》2004年第8期1352-1360,共9页Journal of Computer Research and Development

基　　金：国家自然科学基金项目 ( 60 2 73 0 70 ) ;国家"八六三"高技术研究发展计划基金项目 ( 2 0 0 2AA12 10 3 2 ) ;中国科学院计算技术研究所青年基金项目 ( 2 0 0 2 6180 14 )

摘　　要：时延变化是反映网络路径负载特征的IP网络性能指标 基于路径排队模型 ,发现时延变化对负载的反映受探测包发送时间间隔影响 因参考时延选取不当及采样方式限制 ,现有方法所测时延变化只粗略反映路径负载 提出了包对采样方法选取恰当参考时延 ,避免采样方式限制 ,增强了时延变化反映路径负载的能力 ;同时确定了探测包发送时间间隔的下界IPDV is an important performance metric of IP network which reflects network path's workload characteristics. Based on a path queueing model, it is found that the reflection IPDV has on path workload is influenced by the interval of probes' sending time; the IPDV measured by the existing method just reflects path workload superficially for inappropriately selected reference delay and the limitations of the sampling method. The packet-pair sampling measurement method proposed can improve the reflection capability by selecting the proper reference delay and avoiding the limitations of the sampling method; What is also determined is the minimum interval between the two packets in a packet pair. Experiments on an Internet path validate the improved reflection capability of the packet-pair sampling method and the interval time's influence on it.

关 键 词：网络测量 网络性能 时延变化 包对采样 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]