无线网络TCP RENO协议饱和吞吐量建模与分析.doc

文档介绍：
无线网络 TCP RENO 协议饱和吞吐量建模
与分析#
陈楚碧,雷磊,罗诚,朱钢**
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(南京航空航天大学电子信息工程学院,南京 210016)
摘要:本文无线网络环境下对 TCP Reno 协议饱和吞吐量建模展开研究。发现现有的饱和吞
吐量模型未考虑 TCP Reno 快速恢复状态,因而在计算拥塞窗口值时存在误差;同时,现有
模型未考虑 TCP 协议等待应答超时后的慢启动状态。针对上述分析,本文以产生数据分组
丢失的不同标志事件为依据,分析拥塞窗口与丢包概率以及传输往返时间之间的关系,并在
TCP Reno 饱和吞吐量模型中引入快速恢复状态。仿真结果证明,本文提出的模型可以更加
有效地估计拥塞窗口值,从而准确地得出 TCP Reno 协议的饱和吞吐量。
关键词:无线网络;TCP;饱和吞吐量;快速恢复;拥塞窗口
中图分类号:TP393
Modeling and Analyzing the Saturated Throughput of TCP
RENO in works
CHEN Chubi, LEI Lei, LUO Cheng, ZHU Gang
(Nanjing University of Aeronautics and Astronautics, NanJing 210016)
Abstract: In this paper, we propose a model to analyze the saturated throughput of TCP Reno in
works. First, we have found that prior work on TCP Reno steady state throughput
models ignored fast recovery state, thus leading to the deviation of calculating congestion window.
Moreover, prior models did not consider of the slow start state of TCP timeout behavior. We
further develop a model which introduces a characterization of fast recovery algorithm for the
saturated throughput of TCP Reno based on its loss indications and calculate congestion window
values as a function of loss rate and round trip time. Finally, extensive measurements demonstrate
that our model is able to estimate congestion window effectively and predict the saturated
throughput of TCP Reno accurately.
Keywords: