Ad Hoc中的TCP改进方案——Adaptive ADTCP  

Adaptive ADTCP:Improvement scheme of TCP in Ad Hoc network

作　　者：宋军[1] 李浩[1] 李嫄源[2] 李霖[1] 

机构地区：[1]重庆交通大学信息科学与工程学院,重庆400074 [2]重庆邮电大学计算机科学技术学院,重庆400065

出　　处：《计算机应用》2010年第7期1750-1753,1756,共5页journal of Computer Applications

基　　金：重庆市自然科学基金资助项目(CSTC2008BB2352)

摘　　要：在分析无线自组网特点及其对TCP性能影响的基础上,提出了一种能够自适应无线自组网状态的TCP改进方案(Adaptive ADTCP)。Adaptive ADTCP在明确辨识网络状态的前提下,首先根据前向路径跳数自适应地调整拥塞窗口增长因子,限制源节点TCP拥塞窗口过分增长,避免造成网络拥塞;同时源节点TCP根据当前拥塞窗口自适应改变发送的分组长度,充分利用网络资源。仿真实验表明,在网络重负载和节点高速移动情况下,Adaptive ADTCP对数据传输的吞吐量有较大提升。Based on analyzing the characteristics of Ad Hoc network and its impact on TCP performance,a mechanism named Adaptive ADTCP（Adaptive Ad Hoc TCP） was proposed.On the basis of acquiring a clear identification of network status,this mechanism configured the window increment factor adaptively according to the forward path length.And then,greedy growth of TCP congestion window was limited to avoid congestion.The packet size in light of current congestion window was changed to make full use of network resource.The simulation result shows that Adaptive ADTCP improves the throughput of TCP significantly both in heavy load and high mobility scenario.

关 键 词：无线自组网 传输控制协议 网络状态辨识 拥塞窗口 增长抑制 自适应 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]