A Flexible Real-Time Transport Protocol for Controller Area Networks

摘要

Controller Area Network (CAN) is a serial communications protocol for transmitting short control messages in a real-time embedded system. For larger messages, several higher-level transport protocols have been proposed and standardized for a wide range of applications. These protocols generally assign the same fixed priority to all frames in a given message. This paper presents a new transport protocol that allows frames in a message to be assigned up to two different priorities. The feasibility of many message sets can be improved by using this new protocol. This paper also presents an algorithm to test the feasibility of a given message set.