Abstract: To improve the bandwidth utilization of a FlexRay network, it is necessary to gain a deep insight into this performance parameter. Based upon current model for time parameter optimization in a FlexRay network, through reducing a nonlinear operator to a linear one, analytical expressions of the optimal payload length of static frame and the maximum bandwidth utilization in the static segment of a FlexRay network were derived. The numerical experiments verify the validity of the analytical expressions, and demonstrate that the obtained analytical formulae are capable of providing an exact calculation for the bandwidth utilization in a FlexRay network.

Key words: fieldbus, FlexRay network, static segment, bandwidth utilization

摘要： 为提高FlexRay网络的带宽利用率,将基于FlexRay网络的时间参数优化模型中的非线性算符化简为线性算符,推导出了FlexRay网络中最优静态帧净荷段长度和最大带宽利用率的解析表达式。数值实验验证了解析表达式的正确性,证明了所得的解析公式能够对FlexRay网络的带宽利用率进行准确的计算。

关键词: 现场总线, FlexRay网络, 静态段, 带宽利用率