提供QoS保障的无线多跳路径可用带宽估计模型与方法  

Available Bandwidth Estimation in Wireless Multihop Path for QoS Provision: Model and Method

作　　者：宋安[1] 赵海涛[1] 王杉[1] 魏急波[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2012年第4期818-824,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61002032);教育部博士点基金资助项目(20094307110004)资助课题

摘　　要：该文对多跳路径的可用带宽估计问题进行了研究,提出了在估计过程中必须将全局QoS保障作为可用带宽的估计原则。对多跳路径的干扰进行了定性分析与定量计算,并利用排队网络理论建立了路径性能分析模型,利用该模型能得出路径中各个业务流的QoS参数。在此基础上设计了能提供QoS保障的可用带宽估计方法。该文所提出的估计方法以QoS需求不被破坏为约束条件,克服了现有工作将无约束的最大可达吞吐量作为可用带宽从而导致业务的QoS可能受到影响这一缺陷。仿真实验证明了分析模型与可用带宽估计方法的准确性。This paper focuses on the issue of available bandwidth estimation in wireless multihop path and takes the overall QoS provision as the principle in estimation.Through analyzing and quantitative calculating the interference on the multihop path,the analytical model for performance analysis is derived based on queueing networks theory and from which the QoS parameters of each flow along the path are obtained.Based on the model a method for available bandwidth estimation for QoS provision is proposed,which takes the flow＇s QoS demands as the constraints and thus overcomes the drawbacks of the existing schemes that only take the maximum achievable throughput as the available bandwidth while the flow＇s other QoS demands may be affected.Both the proposed model and the estimation method are validated through extensive simulations.

关 键 词：无线多跳网络 可用带宽 流内竞争 排队网络 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]