ISO 11898-4:2004规定了控制器局域网（CAN）中的时间触发通信:一种支持分布式实时控制和多路复用的串行通信协议，用于道路车辆。它适用于在配备CAN的道路车辆的电子控制单元（ECU）之间建立时间触发的数字信息交换，并指定帧同步实体，该实体根据ISO 11898-1协调逻辑链路和媒体访问控制的操作，以提供时间触发的通信计划。

ISO 11898-4:2004 specifies time-triggered communication in the controller area network (CAN): a serial communication protocol that supports distributed real-time control and multiplexing for use within road vehicles. It is applicable to setting up a time-triggered interchange of digital information between electronic control units (ECU) of road vehicles equipped with CAN, and specifies the frame synchronisation entity that coordinates the operation of both logical link and media access controls in accordance with ISO 11898-1, to provide the time-triggered communication schedule.