CAJ | 학술논문

传统的基于测量的Internet性能参数估计要求测量点是端到端路径的起点和终点,这一方面使得测量和估计带有很大盲目性,增加了网络流量;另一方面会导致测量方法难于实施,估计结果不准确.提出了基于分段测量的思想,对ITU-T定义的延迟、延迟变化、丢包率和错误率4个参数进行测量和估计.由于测量是分段进行的,每次测量值都可应用于多条端到端路径的性能参数估计,因此降低了盲目性并大大减少了网络流量.为验证本方法的性能,基于PlanetLab平台设计和实现了生成器、性能参数测量机和结果收集器.通过在全球的100多个节点上的部署和为期一个月的运行证明了该方法便于实施,并且具有较高的准确性.
전통적기우측량적Internet성능삼수고계요구측량점시단도단로경적기점화종점,저일방면사득측량화고계대유흔대맹목성,증가료망락류량;령일방면회도치측량방법난우실시,고계결과불준학.제출료기우분단측량적사상,대ITU-T정의적연지、연지변화、주포솔화착오솔4개삼수진행측량화고계.유우측량시분단진행적,매차측량치도가응용우다조단도단로경적성능삼수고계,인차강저료맹목성병대대감소료망락류량.위험증본방법적성능,기우PlanetLab평태설계화실현료생성기、성능삼수측량궤화결과수집기.통과재전구적100다개절점상적부서화위기일개월적운행증명료해방법편우실시,병차구유교고적준학성.
The traditional measurement based method for estimating Internet performance parameters requires measurement points to be the start and the end of an end-to-end path. Such condition cad make measurement aimless and increase network traffic. Meanwhile the estimation may be hard to implement, and the results may also be less accurate. This paper proposed a novel approach based on segmental measurement to estimate delay, delay variation, loss rate and error rate, which were defined by ITU-T. As each measurement can be used to several end-to-end path performance parameter estimations, the aimless of measurement was avoided and the network traffic was cut down significantly. Three module, including packet and path generator, parameter measurement machine and result collector, were designed and implemented based on PlanetLab. Its feasibility was illustrated by deploying on more than 100 world wide nodes. And the running data collected by result collector proved its accuracy.