文档介绍：改进的TCP拥塞控制慢启动策略及仿真
杨喜权1,闫洪森2,王大勇1
(,吉林长春 130024;
,吉林长春 130022)
摘要:针对现有TCP拥塞控制算法的慢启动策略会使拥塞窗口呈指数级增长,导致一个窗口中出现多个包丢失的情况,提出了一种能使拥塞窗口平滑地增长到慢启动阈值的新策略。该策略实现连接的平滑接入并能相对平滑的过渡到拥塞避免阶段。通过NS2仿真,新策略不仅能明显减少丢失包的数量还能有效地管理路由器缓冲区中的队列。
关键词:自相似;TCP拥塞控制;慢启动;NS2
中图分类号:TP39 文献标识码:A 文章编号:1000-436X(2007)8A-0168-04
Improving and simulating of slow-start for TCP
congestion control schemes using NS2
YANG Xi-quan1, YAN Hong-sen2, WANG Da-yong1
( puter Science, Northeast Normal University, Changchun 130024, China;
Information Institute, Changchun University, Changchun 130022, China)
Abstract: The current slow-start of TCP congestion control schemes was presented. A new strategy was presented to improve the old slow-start. It can increase the congestion window gradually. And the simulation results of the NS2 show that modified conventional congestion control algorithm not only reduce packet loss but also will be the good helper for the solution of unfairness to long RTT and burstization of traffic , the stability of the TCP protocol work utility was improved.
Key words: self-similar; TCP congestion control; slow-start algorithm; NS2
1 引言
收稿日期:2007-06-12
基金项目:国家自然科学基金资助项目(60473042)
Foundation Item: The National Natural Science Foundation of China (60473042)
计算机网络是当今社会生活中的一个重要组成部分。稳定发展的重要因素。首次发生崩溃以来[1],这20年的时间里,人们对TCP拥塞控制进行了深入而广泛的研究[2~5],提出了各种TCP