摘要： 针对基于流体流理论提出的网络模型在推导过程中的一些近似使得该模型对网络行为描述的不精确问题，提出了网络流量的精确模型，并且基于该模型把一种新的PID及类PID设计方法用于主动队列管理(AQM)控制器的设计，利用约束化的数值优化方法寻找控制器参数。理论分析和仿真实验表明，该控制算法的综合性能优于PI算法。

关键词: 网络精确模型, 拥塞控制, 主动队列管理, 类PID控制

Abstract: Some flaws are inevitable due to its approximation in the model evolvement which is based on fluid flow theory. An exact model of network fluid flow is presented. Based on this new model, a novel proportional integral differential (PID) and PID-like controller design method is applied to active queue management(AQM), and a numerical optimization algorithm is used to search the controller parameters. Theoretical analysis and simulation experimental results show that the integrated performance of the proposed algorithm is obviously superior to that of the existing PI algorithm.

Key words: Network exact model, Congestion control, Active queue management(AQM), PID-like controller

中图分类号: 

• TP393