针对汽车控制系统中实时通信的高性能需求,文中采用以CAN总线作为网络底层协议,以SAE J1939协议和TTCAN协议作为网络的上层协议的分层网络结构。TTCAN是一种基于时间触发机制的协议,因此这种网络结构不仅可以实现系统各节点之间高速数据共享,同时能够提高网络带宽的利用率,而且在消息的实时性能方面得到很好的改善。在测试当中,取得了良好的效果,充分证明了方案的可行性。 Aimed at the high-performance demand of real-time communication in automotive control system, this paper adopts CAN bus as the underlying protocol of the network and SAE J1939 protocol and TTCAN protocol as the hierarchical network structure of the upper layer protocol of the network. TTCAN is a protocol based on time-triggered mechanism. Therefore, this network architecture can not only achieve high-speed data sharing between nodes in the system, but also improve the utilization of network bandwidth and improve the real-time performance of the message. In the test, achieved good results, fully proved the feasibility of the program.