摘要： 分析EPA微网段中EPA通信调度管理实体的调度原理，讨论EPA通信调度算法的信道使用效率，并给出在一定条件下，周期数据传输阶段的信道利用率和非周期数据传输阶段的信道利用率。通过理论推导得出上限值及下限值。根据OPNET Modeler创建EPA仿真模型，证明EPA调度算法的信道利用率能够达到理论值的最大值与最小值，验证了理论推导结果的正确性。
关键词:
OPNET仿真,
EPA协议,
微网段,
信道利用率,
实时性,
周期调度
Abstract: This paper analyzes the scheduling principles of Ethernet for Plant Automation(EPA) communication schedule management entity in the EPA micro-segment, discusses the channel schedule efficiency of EPA communication schedule algorithm, and gets the range of channel utilization in periodic data transmission stage and non-periodic data transmission stage under certain conditions. It obtains the maximum and minimum values of channel utilization through derivation. A EPA simulation model is designed, experiment shows that the utilization can obtain the extremum value of theoretical value, and verifies the correctness of the theoretical results.
Key words:
OPNET simulation,
Ethernet for Plant Automation(EPA) protocol,
micro-segment,
channel utilization rate,
real-time,
periodic schedule
中图分类号:
蔡晨光, 姜秀柱. EPA调度算法信道利用率分析及仿真[J]. 计算机工程, 2012, 38(9): 76-78,82.
CA Chen-Guang, JIANG Xiu-Zhu. Analysis and Simulation of EPA Schedule Algorithm Channel Utilization Rate[J]. Computer Engineering, 2012, 38(9): 76-78,82.