The time delay control of CAN messages for real-time communication

The latest advances in the field of microelectronics and modern control systems demand for more flexible control architectures. As a result of that, the centralized control architectures are replaced by flexible distributed control systems based on intelligent drives and powerful communication networks. CAN network was designed for car networking in order to reduce the complexity of the related wiring harnesses. To achieve the real-time communication constraints the traditional CAN application technique must be updated. This paper presents a new approach of using the dynamically priority allocation technique for a CAN network. Our solution is to increase gradually the message priority until it becomes the message with the highest priority from the network and it is transmitted. This method of message priority allocation allows us to determine its maximum transmission time.