TCP-BM:一种适用于异构网络的TCP协议改进策略

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。

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

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.