网络切换对TCP吞吐量和公平性的影响分析  

Influence of Network Handover on TCP Throughput and Fairness

作　　者：李芳[1] 程东年[1] 

机构地区：[1]国家数字交换系统工程技术研究中心,河南郑州450002

出　　处：《通信技术》2008年第9期107-109,共3页Communications Technology

基　　金：国家863计划

摘　　要：无线移动网络的发展日新月异。TCP协议是目前互联网上使用的最为广泛的端到端可靠传输协议,但其应用在无线网络上的时候,TCP性能下降明显。文中详细分析了TCP移动网络的切换对TCP造成影响的几个重要方面。最后通过在NS2上进行实验揭示了对多个TCP流公平性的影响,即切换后RTT越小的TCP流的吞吐量增长的越快,同时静态链路会夺取无线链路的链路资源。The development of wireless and mobile network is changing with each passing day. TCP protocol is the most widely used transport protocol used in Internet nowadays. However, the features of the wireless and mobile network degrade the performance of original TCP protocol. This paper describes some important factors which influences the TCP performance during mobile network handover. Finally, the influence of the handover on TCP performance is verified. The TCP flow which has small RTT can raise its throughput faster than the flow which has larger RTT, and the TCP flow in static link could capture resources belonging to wireless links

关 键 词：移动网络 切换 吞吐量 公平性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]