中文摘要：

针对FlexRay网络参数设计问题，定性分析了动态段长度等参数和消息 ID分配对网络性能的影响，推导出动态段带宽利用率和消息最坏响应时间计算方法。以消息响应时间为约束，以最大带宽利用率和最小整体响应时间为设计目标，给出了 FlexRay 动态段长度和帧 ID 的优化设计模型及求解算法。以CANoe和DaVinci Network Designer为仿真平台进行实验，结果表明，该设计方法能够保证较高的动态段带宽利用率和较小的消息响应时间。

英文摘要：

In order to design the parameters of FlexRay network,impacts of several parameters such as the length of the dynamic segment and frame identifier assignment on the network perform-ance of automobile FlexRay were analyzed qualitatively,and calculation methods for the utilization of network bandwidth and the worst case response time of messages were deduced.Under the con-straints of message response time,the optimization design model and algorithm for the length of the dynamic segment and frame ID assignment were given,which aimed at the maximum bandwidth utili-zation and the minimum response time of messages.Experiments made in the simulation platform of CANoe and DaVinci Network Designer show that this design method can improve the dynamic band-width utilization effectively and reduce the dynamic message response time.