一种有效的无线Mesh网络流量整形模型  

Effective Traffic Shaping Framework of Wireless Mesh Networks

作　　者：漆华妹[1] 陈志刚[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《小型微型计算机系统》2009年第2期219-224,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60573127;60773012)资助

摘　　要：流量整形对QoS(quality of service)控制有着重要的影响.研究并分析发现,无线Mesh网络具有自相似性,其自相似性对网路的QoS性能具有较大的影响.总结并优化了最近几年发展起来的能够深刻透视计算机网络业务流控制问题的网络演算技术,分析发现统计网络演算可以用来计算性能的概率或统计边界问题,适合于无线Mesh网络,运用统计网络演算建立了无线Mesh网络自相似业务流的贪婪分形整形器的数学模型;推导了贪婪分形整形器的统计性能模型,包括整形器的输出特性、队列长度与延迟等性能;数据分析证明贪婪分形整形器对无线Mesh网络自相似业务进行整形不会增加网络端到端延迟和缓冲区容量需求.Traffic shaping has an enormous impact on the provision of QoS（quality of service） guarantees. In this paper, we research and analyses Wireless Mesh Networks, and find it has the self-similar characteristic, which has a great effect on the network QoS. The fundamentals of network calculus, a set of recent developments which provide a deep insight into flow problems encountered in computer networks are summarized and refined. We find that statistical network calculus cans calculus the probability of the performance and the statistical bound, so it is must that using statistical network calculus analyses wireless Mesh networks. By using statistical network calculus, which uses in wireless network, a general mathematical model of the greedy fractal shaper for controlling self-similar traffic is proposed. Then the performance model of the greedy fractal shaper is derived, which includes the output characterization of the traffic shaper, queue length and delay. At last, Numerical analyses demonstrate that the shaping on Wireless Mesh Networks self-similar traffic based on greedy fractal shaper will not affect the end-to-end delay and buffer capability.

关 键 词：统计网络演算 无线MESH网络 自相似业务流 流量整形 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]