摘要
在网络传输控制策略和算法的设计中 ,性能评价的标准是一个关键问题 .不同的评价标准将导致不同的控制策略和算法设计 .由于网络传输控制策略有着多方面性能的要求 ,如何同时满足多个性能目标是当前的研究难点 .该文基于网络传输控制模型提出了一套对网络传输控制进行综合性能评价的有效标准 ,该标准综合考虑了网络整体性能、用户 Qo S要求和系统公平性等多维目标 ,作者对该标准进行了详细的讨论和分析 .文中的综合性能标准可以广泛用于网络传输控制策略的性能评价和改进 .
This paper studies the network traffic control model,and proposes a set of effectively integrated performance evaluation criteria,and the criteria integrates several objects,such as the network performance,user's and application's QoS requirement and system fairness. First,for evaluating the effectiveness of a network traffic control scheme, authors consider the two principal metrics of networking: throughput and delay,and improve on the original power of the network,and extend it to the multiple,competitive connections. Second,in the relative differentiated service approach, authors propose the proportional fairness principle,and the corresponding integrated evaluation criteria that consider QoS requirements,such as packet delay and loss rate,and system fairness simultaneously. The proportional fairness principle 'spaces' certain class performance metrics proportionally to the differentiation parameters that the network operator chooses. At last,a set of integrated performance evaluation criteria for network traffic control is defined; which could be used in practice to evaluate multiple-object performance. Because the complexity of the research on multiple-object performance,up to now,there is still no effective integrated evaluation criteria for network traffic control strategy. This paper made a useful theoretical pilot study,and the result can be applied to performance evaluation,selection and optimization of this kind of various complex systems.
出处
《计算机学报》
EI
CSCD
北大核心
2002年第8期869-877,共9页
Chinese Journal of Computers
基金
国家自然科学基金 ( 90 10 40 0 2
6 972 5 0 0 3
6 0 1730 12 )
国家"九七三"重点基础研究发展规划项目 ( G19990 32 70 7)
国家"八六三"高技术研究发展计划项目 ( 2 0 0 1AA1112 0 1)资助
