| 一种改进的TCP连接初始阶段的拥塞控制模型 |
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| 引用本文： | 汪永伟,司彬彬,赵靓,陈越.一种改进的TCP连接初始阶段的拥塞控制模型[J].计算机工程与应用,2004,40(26):152-154. |
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| 作者姓名： | 汪永伟 司彬彬 赵靓 陈越 |
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| 作者单位： | 1. 解放军信息工程大学电子技术学院,郑州,450004
2. 国家数字交换系统工程技术研究中心,郑州,450002 |
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| 基金项目： | 国家863高技术研究发展计划:高性能IPv6路由器基础平台及实验系统(编号:2001AA121011) |
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| 摘 要： | 论文对TCP连接初始阶段的拥塞控制模型加以改进,以避免初始阶段大量丢包现象的发生。在改进模型中,发送方根据最初收到的ACK动态估计网络可用带宽,并以此计算初始的慢启动阈值ssthresh,并将拥塞发生后的ssthresh调整为网络数据包总长度的3/4。该模型包含慢启动、拥塞避免、快速重传和快速恢复四个阶段。最后,测试结果表明了改进的模型获得了更好的性能。
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| 关 键 词： | 拥塞控制 慢启动阈值 带宽估计 确认 |
| 文章编号： | 1002-8331-(2004)26-0152-03 |
A Refined Congestion Control Scheme for Initial TCP Connection |
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| Wang Yongwei,Si Binbin,Zhao Liang,Chen Yue.A Refined Congestion Control Scheme for Initial TCP Connection[J].Computer Engineering and Applications,2004,40(26):152-154. |
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| Authors: | Wang Yongwei Si Binbin Zhao Liang Chen Yue |
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| Affiliation: | Wang Yongwei 1 Si Binbin 1 Zhao Liang 2 Chen Yue 11 |
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| Abstract: | This paper proposes changes to the conges ti on control scheme to avoid lots of lost packets in a window dur-ing the start up period of a TCP connection.In our improved scheme ,the sender dynamically calculates the bandwidth using the acknowledgments originally received.Thus,a more appropriate ssthresh can be got for TCP initial connections.We also adjus t the ssthresh to three quarters of the outstanding segments.This scheme inclu des four phases which are Slow Start,Congestion Avoidance,Fast Retransmit and Fast Recovery.The test results show that the refined scheme achieves better p erformances. |
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| Keywords: | congestion control ssthresh bandwidth estimation ack nowledgment |
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