针对FlexRay总线静态段调度无法应对系统动态变化的问题,提出一种静态段的动态分配调度方法.引入调度节点,以传输触发消息帧(TM)实现通信周期的分配调度,给出静态消息的周期调度表(PST)的构建方法,并对调度表内容进行动态更新.仿真结果表明,该方法在满足周期消息可调度性的同时,提高了系统的灵活性.
To solve the problem of FlexRay network static segment scheduling unable to cope with the system dynamic change,a dynamic allocation scheduling method for the static segment is presented.The scheduling node is introduced into FlexRay network to implement round-robin scheduling based on basic cycle by transferring trigger message (TM).The method allotting the static messages in period scheduling table (PST) is introduced,and the content of the PST is updated dynamically.The result of the simulation indicates that the method can improve the flexibility performance of the system,at the same time the schedulability of periodic messages is met.