认知网络下TCP协议性能分析  

TCP Performance Analysis in Cognitive Radio Networks

作　　者：王精华[1] 徐昌彪[1] 鲜永菊[1] 袁伟[1] 张坤[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电视技术》2011年第19期72-75,共4页Video Engineering

基　　金：国家自然科学基金项目(60972068);重庆教委科学技术研究项目(KJ090502KJ100517);重庆邮电大学青年教师基金项目(A2008-28)

摘　　要：首先在无线环境下的基础上搭建认知平台,当主用户想要占次用户信道时,通过基站的频谱监测,频谱分配,分配次用户到其他空闲信道继续通信。其次,在此平台下分析TCP Reno,TCP Newreno,TCP Sack1和TCP vegas协议的性能,包括拥塞窗口、吞吐量。最后定量分析主用户活跃程度、切换后信道带宽和信道误比特率对TCP吞吐量的影响。In this paper, a Cognitive Radio（CR）platform under wireless circumstances is established, when the Primary User（PU） attempts to occupy the channel, the CR switch secondary user to another idle channel through spectrum sensing and spectrum allocation, so that the communication of secondary user can be continued, this is where the innovation lies. Performance of TCP Reno, TCP Newreno, TCP Sackl and TCP vegas are all analyzed, incuding congestion window and throughput. Finally, the PU activity level, channel bandwidth after switch and the effect on TCP throughput by channel bit error rate are quantitatively analyzed.

关 键 词：认知无线电网络 传输控制协议 吞吐量 

分 类 号：TN915[电子电信—通信与信息系统] TP302.7[电子电信—信息与通信工程]