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如何对网络流量实施有效管理和控制是网络性能评价、网络协议设计和网络规划等考虑的关键因素之一。在对普通ILAN(工业局域网)底端现场总线分析的基础上,提出了一种流量计算的数学模型,据此模型,提出了一个基于PID方法的流量控制机制。实验仿真证明该PID机制具有良好的瞬态和稳态性能,鲁棒性好,网络资源利用率高。最后在工业局域网实际分析的基础上提出了一种改进型的流量控制机制。
How to implement effective management and control of network traffic is one of the key factors to be considered in network performance evaluation, network protocol design and network planning. Based on the analysis of the field bus at the bottom of normal ILAN, a mathematical model of traffic calculation is proposed. Based on this model, a flow control mechanism based on PID method is proposed. The experimental simulation proves that the PID mechanism has good transient and steady-state performance, good robustness and high network resource utilization. Finally, based on the actual analysis of industrial LAN, an improved flow control mechanism is proposed.