摘要
随着对网络拥塞控制的深入研究,出现了许多有关网络流量的控制理论及网络模型.Misra等人于2000年基于流体流(fluidflow)理论提出的模型被研究人员广为采用.但模型在推导过程中的一些近似却使得模型对网络行为描述不精确.本文对此从理论和实验结果两方面进行了详细分析,并对原模型进行了改进.基于改进的模型,把一种PID(ProportionalIntegralDifferential)及类PID设计方法用于AQM(ActiveQueueManagement)控制器的设计.对比仿真结果表明,该算法具有更好的性能.
With further research on the network congestion control, many flow control theories and network models have appeared. Based on fluid flow theory, Misra developed a dynamic model of the TCP congestion window in 2000, which has been accepted by many researchers. However, some flaws are inevitable due to its approximation in the model evolvement. This paper gives a detailed analysis of its shortcoming from both the theory and experimental results. Then it presents an improved model. Based on this model, a new PID (Proportional Integral Differential) and PID-like controller design method is applied to AQM controller. Experimental results show that this algorithm outperforms other algorithms.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第5期842-846,共5页
Acta Electronica Sinica
基金
中国科学院百人计划(No.BCK35873)
国家自然科学基金(No.60373053)
中国科学院与英国皇家学会联合(No.20030389
No.20032006)
国家863计划软件重大专项项目(No.2003AA1Z2220)
教育部留学回国人员科研启动基金(No.教外司留[2003]406号)
关键词
网络模型
拥塞控制
主动队列管理
咖控制
大时滞
D稳定域
Algorithms
Computer networks
Control equipment
Flow control
Flow of fluids
Internet
Management
Mathematical models
System stability
Three term control systems
