非饱和条件下802.11无线网络的精确分析模型  

Accurate Analytical Model for IEEE 802.11-based Networks under Nonsaturated Condition

作　　者：宋安[1,2] 赵海涛[1] 王杉[1] 魏急波[1] 谢艳[2] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073 [2]西南电子电信技术研究所,成都610041

出　　处：《系统仿真学报》2013年第4期760-768,共9页Journal of System Simulation

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

摘　　要：对无线网络中节点队列间的耦合性及其带来的影响进行了研究,并首次将其应用于非饱和条件下DCF分析模型的建立。建立了非饱和条件下的服务时间模型并结合M/G/1排队模型分析了网络的时延与吞吐量。仿真实验证明了队列间的耦合性在非饱和条件下给网络带来的影响。通过仿真实验结果与数值分析结果的对比,验证了分析模型的准确性。Queues coupling and its influence to wireless networks performance were studied, and were applied in building the analytical model of DCF mechanism under nonsaturated condition. The nonsaturated analytical model of service time was developed and based on which the delay and throughput of the network were analyzed considering M/G/1 queuing model. Simulation results demonstrate the influence brought by queues coupling under nonsaturated condition. The accuracy of the proposed model was validated through comparing the numerical results and the simulation results.

关 键 词：IEEE 802 11 非饱和 服务时间 队列模型 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]