Modeling and Verifying the TTCAN Protocol Using Timed CSP

As one of the most practical protocols, Time-Triggered CAN protocol (TTCAN), which is time triggered to ensure the real-time capability required by embedded systems, has been widely used in the automotive electric system development. In this paper, we present a formal model of the TTCAN protocol using Timed Communicating Sequential Processes (Timed CSP). All the components in the protocol are abstracted as CSP processes, thus the basic transmission in TTCAN is converted into the communication between different CSP processes. Besides, an error handling model is also proposed to capture the exception in the protocol. Finally, we use model checker Process Analysis Toolkit (PAT) to verify whether we can achieve model caters for some properties, which are specified using Linear Temporal Logic (LTL) formulas. Based on the verification results, our TTCAN model turns out to match the specification.