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运用现代控制理论和方法 ,针对计算机高速互联网中最大努力服务交通流即能控交通流的调节问题 ,提出了一种基于速率的具有比例加微分 (PD)控制器结构的拥塞控制理论和方法 .在单个节点的交通流的模型基础上 ,运用控制理论中系统稳定性分析方法 ,讨论如何利用信终端节点缓冲占有量的比例加微分的反馈形式来调节信源节点的能控交通流的输入速率 ,从而使被控网络节点的缓冲占有量趋于稳定 .仿真结果显示 ,在所设计的PD控制方案下 ,网络的有关性能较好 .
Using modern control theory and method, this paper proposes a congestion control theory and method based on rate with proportional-plus-differential (PD) controller based on the adjustment of traffic flow that can be controlled by traffic maximization in computer high speed internet. On the basis of traffic flow model of a single node, this paper uses the method of system stability analysis in control theory to discuss how to adjust the input rate of energy-controlled traffic flow of source node by using the proportional and differential feedback form of buffer share of signaling terminal node So that the buffer share of the controlled network nodes tends to be stable.The simulation results show that the performance of the network is better under the designed PD control scheme.