针对CAN总线中消息在固定优先级调度（FPS）算法下传输不可预知、低优先级消息容易被阻塞的问题，提出了一种基于时间触发机制的固定优先级调度（TT-FPS）算法，给出了最糟糕响应时间的计算方法。然后以纯电动汽车消息系统为例进行了TT-FPS的性能分析，验证了TT-FPS 较FPS有更好的性能。

Message transmission of CAN bus fixed priority static scheduling algorithm ( FPS) is unpredictable, and low priority message is easily blocked. To solve these problems, a new fixed priority scheduling based on time-triggered architecture (TT - FPS) is presented, and the approach for calculating the worst-case response time of TT - FPS is given. The performance analysis of TT - FPS based on electric vehicle message model is given, and the experiment results prove that the TT - FPS is superior to FPS.