异构混合网络环境下TCP协议性能分析  

Analysis of TCP performance in heterogeneous networks

作　　者：殷齐鹏[1] 吴纯青[1] 虞万荣[1] 赵宝康[1] 马延鹏[1] 

机构地区：[1]国防科学技术大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2013年第12期52-57,共6页Computer Engineering & Science

基　　金：国家863计划资助项目(2010AA7010203);国家973计划资助项目(613118)

摘　　要：目前,有线网络、无线网络、卫星网络、高速网络均已成为承载网络,这种异构混合网络的主要特点是部分链路误码率高、时延长、带宽不对称等。TCP是针对一般有线网络设计的协议,无法在异构混合网络特别是卫星网络中发挥出最佳性能。利用OPNET模拟异构混合网络环境,得到误码率、时延、非对称性对TCP协议性能的影响规律,可以为恶劣环境下的TCP协议性能优化提供借鉴。At present,wired networks,wireless networks,satellite networks and high-speed net-works all can carry the data payload,and the main features of heterogeneous networks are high BER （Bit Error Rate）,long delay,asymmetry of bandwidth in some links,and so on.Since TCP is designed for normal wired networks so as not to work very well in heterogeneous networks.OPNET is used to simulate heterogeneous networks,and obtain the regular of how the BER,delay and asymmetry affect the TCP performance.The obtained regular can provide a reference for experiments on optimization of TCP performance in challenged networks.

关 键 词：异构混合网络 误码率 时延 非对称性 TCP性能 OPNET 

分 类 号：TP331.2[自动化与计算机技术—计算机系统结构]