编码TCP的建模与性能分析  

Modeling and analyzing for network coded TCP

作　　者：张三峰[1,2] 李爽[1,2] 蓝翔[1,2] 胡永东[1,2] 

机构地区：[1]东南大学计算机科学与工程学院,江苏南京211189 [2]东南大学计算机网络和信息集成教育部重点实验室,江苏南京211189

出　　处：《通信学报》2013年第11期112-120,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(61300200);江苏省自然科学基金资助项目(BK2011335)~~

摘　　要：研究了无线网络端到端分组丢失和编码纠错对TCP协议工作过程的影响机制,基于三维Markov链建模描述TCP拥塞窗口和可用窗口的变迁过程,在忽略慢启动阶段的条件下,以最大窗口尺寸、端到端分组丢失率和编码冗余系数为输入参数,通过数值计算求解编码TCP的吞吐率,据此定量分析影响编码TCP性能的因素。基于NS2的模拟实验结果表明基于Markov链的数值计算结果具有较高的准确度。The evolutionary process of network coded TCP against lossy links and error correcting coding were analyzed. Ignoring the slow start phase, the state transition process of congestion window and available window was described based on a three-dimension Markov chain model. With maximum window size, end-to-end packet loss rate and redun- dancy factor as input parameters, throughput of network coded TCP was calculated to carry quantitative analysis of fac- tors affecting the network coded TCP performance in the numerical analysis model. Simulation results based on the NS2 simulator show that the numerical analysis model aehiev~ F^irh~ h;~h

关 键 词：无线MESH网 传输控制 网络编码 MARKOV链 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]