基于网络演算的无线自组网TCP丢包率上界研究  

TCP Drop Ratio Upper Bound Research About Wireless Ad Hoc Network Based on Network Calculus

作　　者：李庆华[1] 陈果[2] 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 [2]武汉大学电子信息学院,湖北武汉430079

出　　处：《小型微型计算机系统》2010年第9期1742-1745,共4页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60873082)资助;总装预研基金项目(9140A15030308QT4801)资助

摘　　要：精确的TCP丢包率上界对无线环境下TCP协议的性能改进具有指导意义;对进入无线自组网节点的TCP数据流进行漏桶管制,节点为TCP流提供基于速率-延迟(Rate-Latency)模型的服务保障,在已有无线自组网链路吞吐量模型的基础上利用网络演算理论推导了TCP数据流的丢包率上界模型;在网格拓扑的无线自组网环境下,TCP数据流丢包率的仿真结果都在数值计算的上界范围之内,表明基于网络演算的无线自组网TCP丢包率性能上界模型具有较好的性能.Accurate TCP drop ratio upper bound over wireless environment can instruct TCP performance improvement;The data flow entering the node was regulated by Leaky Bucket,and the node provided Rate-Latency service for the flow.We had derived the TCP drop ratio upper bound for Wireless Ad hoc network based on the existing link throughput model using network calculus theory.For grid topology Wireless Ad hoc network,all simulated results for different data flows were bounded by theoretical results,these show the TCP drop ratio upper bound model perform well.

关 键 词：无线自组网 CSMA/CA 网络演算 TCP 丢包率上界 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]