带宽非对称网络中TCP性能分析

北京邮电大学学报 ›› 2000, Vol. 23 ›› Issue (4): 30-34.

带宽非对称网络中TCP性能分析

邬海涛¹, 隆克平¹, 吴靖¹, 程时端¹, 马健²

1.北京邮电大学程控交换与通信网国家重点实验室,北京 100876;
2.诺基亚北京研发中心,北京 100013

收稿日期:2000-03-28 出版日期:2000-12-10
作者简介: 邬海涛(1976—),男,江西南昌人,博士生.
基金资助:

Performance Analysis of TCP over Bandwidth Asymmetry Networks

WU Hai-tao¹, LONG Ke-ping¹, WU Jing¹, CHENG Shi-duan¹, MA Jian²

1.National Laboratory of Switcling Technology and Telecommunication Networks,Beijing University of
Posts and Telecommunications, Beijing 100876,China; 2.Nokia China R&D Center, Beijing 100013,China

Received:2000-03-28 Online:2000-12-10
Supported by:

摘要/Abstract

摘要： 考察了带宽非对称对基于端到端的TCP协议性能的影响程度.通过数学建模推导出了带宽大量对称情况下TCP平均吞吐量的计算公式,并仿真验证了推导的有效性.结果表明,在带宽非对称网络中,正向吞吐量的取得不仅依赖于正向的业务特性和链路的性能,而且在很大程度上取决于反向的业务特性和链路的性能.结论是反向带宽和队列容量将使TCP性能成非线性变化.

关键词: 计算机网络, 传输控制协议(TCP), 带宽非对称

Abstract: The performance of TCP over bandwidth asymmetry networks is analyzed.With the definition of normalized bandwidth ratio, the formula to calculate the TCP throughput with asymmetrical bandwidth and infinite reverse buffer is deduced. Effectiveness of deduction is verified by simulation studies. In a network with asymmetry bandwidth, throughput achieved is not only dependent on the traffic and link characteristics of the forward direction, but also significantly determined by those of the backward direction. Through simulations and our deduction, we conclude that the TCP throughput is linear to the reverse bandwidth with infinite reverse buffer and nonlinear to that with finite reverse buffer.

Key words: computer networks, transport control protocol(TCP), bandwidth asymmetry

中图分类号:

TN919.1

邬海涛, 隆克平, 吴靖, 程时端, 马健. 带宽非对称网络中TCP性能分析[J]. 北京邮电大学学报, 2000, 23(4): 30-34.

WU Hai-tao, LONG Ke-ping, WU Jing, CHENG Shi-duan, MA Jian. Performance Analysis of TCP over Bandwidth Asymmetry Networks[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2000, 23(4): 30-34.