互联网中网络时延与物理距离关联性分析  

Research on the Correlation between Network Delay and Geographic Distance in Internet

作　　者：焦程波[1,2,3] 郑辉[3] 黄宇[3] 

机构地区：[1]信息工程大学信息工程学院,郑州450002 [2]北京信息技术研究所,北京海淀区100093 [3]西南电子电信技术研究所,成都610041

出　　处：《电子科技大学学报》2012年第5期781-786,共6页Journal of University of Electronic Science and Technology of China

摘　　要：结合网络时延的组成部分,对往返时延与物理距离之间的关联性进行了分析,分析结果显示两者之间存在线性关系。比较不同的往返时延估算方法,以较均匀分布于北美和西欧区域的稳定HTTP服务器作为被测量设备,提出通过分析TCP握手过程获取真实的远距离节点之间的往返时延。最后在真实环境下,统计了不同物理距离下理想的往返时延,结果显示不同区域中往返时延与物理距离之间的线性关系存在较大的差异。The correlation between geographic distance and network delay plays an important role in network measurement. The analysis shows that the relation between distance and delay is linear. By comparing different network delay estimation methods, it is concluded that the statistical result of RTT of HTTP servers uniformly distributed in the earth should be calculated by using TCP handshake procedure. Measurement result under real condition reveals the linear relations between graphic distance and round trip delay in different areas show significant differences.

关 键 词：物理距离 互联网 网络测量 往返时延 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]