Timetriggered implementations of mixed-criticality automotive software

Abstract—We present an automatic schedule synthesis frame-work for applications that are mapped onto distributed time-triggered automotive platforms where multiple Electronic Con-trol Units (ECUs) are synchronized over a FlexRay bus. We classify applications into two categories (i) safety-critical control applications with stability and performance constraints, and (ii) time-critical applications with only deadline constraints. Our proposed framework can handle such mixed constraints arising from timing, control stability, and performance requirements. In particular, we synthesize schedules that optimize control per-formance and respects the timing requirements of the real-time applications. An Integer Linear Programming (ILP) problem is formulated by modeling the ECU and bus schedules as a set of constraints for optimizing both linear or quadratic control performance functions. I