基于网络演算理论计算车电系统总线的最大时延

Calculation of Maximum Delay for the Bus in Integrated Vetronics System Based on Network Calculus Theory

以车电系统总线为研究对象,以网络演算理论为数学工具,提出一种基于网络演算理论的车电系统总线的最大时延计算模型。通过仿真实验得到了车电系统总线中各个信息帧的到达曲线、高优先级的信息帧集合的到达曲线、服务曲线和最大时延的数值结果。与相关研究相比,所建模型输入参数少,计算量小,可以快速求解车电系统总线的最大时延,具有良好的适应性和通用性,可以作为车电系统总线分析、设计与优化的理论支持工具。

The bus in integrated vetronics system （IVS） is taken as the research object, network calculus theory （NCT） is used as the mathematics tool, and a new maximum delay calculation model of the bus in IVS based on NCT is proposed. The numerical results of the arrival curve, the service curve and the maximum delay of every frame and the arrival curve of frame set with higher priority are obtained by simulation experiment. Compared with related research work, the proposed model has many virtues which include less input parameters, low computational complexity ,solving the maximum delay of the bus in IVS rapidly,good adaptability and generality. It can be used as the theoretical tool for analysis, design and optimization of the bus in IVS.