WiMAX网络中自相似呼叫接纳控制算法研究  

Study on self-similar call admission control algorithm in WiMAX

作　　者：胡永东[1,2,3] 吴国新[1,2] 钱宁[1,2] 张三峰[1,2] 

机构地区：[1]东南大学计算机科学与工程学院,江苏南京210096 [2]东南大学计算机网络和信息集成教育部重点实验室,江苏南京210096 [3]南京林业大学信息科学技术学院,江苏南京210037

出　　处：《通信学报》2012年第9期8-14,共7页Journal on Communications

基　　金：江苏省自然科学基金资助项目(BK2011335)~~

摘　　要：针对WiMAX网络业务流的自相似特性,提出用M/Pareto模型来对网络业务流进行建模,通过M/Pareto模型和FBM业务流模型之间统计性质得到2个模型间的参数映射关系,推导出基于M/Pareto模型参数的有效带宽计算公式,据此设计出一个自相似接纳控制算法(SS-CAC)。该算法避免了通过测量的方法来获取FBM业务流模型中参数值,又适应了WiMAX网络流自相似这一特性,使得计算的有效带宽更加精确和方便,提高了系统资源利用率。仿真结果表明,该算法极大地提高网络的带宽利用率,降低了系统的呼叫阻塞率。As to the self-similarity of WiMAX network traffic,M/Pareto model was proposed to model the network traf-fic.Through the statistical nature between the M/Pareto model and FBM traffic model,the parameters of the M/Pareto were mapped to the ones of FBM traffic model.The effective bandwidth formula was derived for M/Pareto model pa-rameters.Whereby,a self-similar call admission control algorithm（SS-CAC） was designed.It avoided getting the pa-rameter values of FBM traffic flow model with the measurement method and adapted to the self-similarity of WiMAX traffic.Since the calculation of the effective bandwidth was accurate and convenient,simulation results show that SS-CAC greatly reduces the call blocking rate and improves the bandwidth utilization.

关 键 词：WIMAX 呼叫接纳控制 自相似 有效带宽 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]