TCP-BM:一种适用于异构网络的TCP协议改进策略  

TCP-BM:a kind of TCP protocol improvement over heterogeneous network

作　　者：胡飞飞[1] 李云[1] 刘期烈[1] 

机构地区：[1]重庆邮电大学无线信息网络研究中心,重庆400065

出　　处：《电子技术应用》2010年第4期115-118,共4页Application of Electronic Technique

基　　金：国家自然科学基金(60702055);教育部新世纪优秀人才支持计划(NCET070914);重庆市教委项目(KJ070521);华为公司基金合作项目(YBWL2008033)

摘　　要：针对异构网络中的拥塞控制问题进行了研究,以传统的TCP Reno协议为基础提出一种改进算法TCP-BM。利用往返时延值将慢启动阶段分为三个部分;利用往返时延值将拥塞避免阶段分为正增长和负增长两个过程。网络发生丢包后,通过往返时延值与历史记录的比较以及估计的带宽值的比较,区分丢包原因,从而对拥塞窗口和慢启动阈值采取不同调整策略。仿真验证证明,改进后的TCP算法性能优于传统的TCP Reno协议。Researching the congestion control of heterogeneous networks, a new TCP algorithm named TCP based Measurement is proposed based on the traditional TCP Reno Protocol. It uses the RTT to divide the slow start stage into three parts firstly;and then divide the avoiding congestion stage into two processes： positive and negative. After the packet lost in the network, it can distinguish the lose reason by comparing the latest RTT with the historic record and by estimating the bandwith, then it will change the value of the congestion window and the slow start threshold differently. The simulation results prove that the improved that TCP algorithm performs better than the traditional TCP Reno Protocol.

关 键 词：异构网络 TCP 拥塞控制 RTT 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]