🤖 AI Summary
Autonomous Driving Systems (ADS) and Advanced Driver Assistance Systems (ADAS) must comply with stringent end-to-end timing constraints mandated by international standards such as ISO 26262 and UN-R155; however, existing approaches lack transparent, white-box modeling and verifiable analysis of timing behavior across the full perception–planning–control–human–machine interaction pipeline. This paper proposes an event-chain-based white-box timing modeling and analysis framework that, for the first time, tightly couples functional safety requirements with regulatory timing constraints. The method enables architecture-level end-to-end timing constraint derivation, probabilistic timing verification, and timing-aware parameter optimization. Through model-based simulation and case studies, it facilitates early detection of timing violations, significantly improves design efficiency, and generates auditable, quantitative evidence of compliance—establishing a novel paradigm for standards conformance certification.
📝 Abstract
Automated Driving Systems (ADS), including Advanced Driver Assistance Systems (ADAS), must fulfill not only high functional expectations but also stringent timing constraints mandated by international regulations and standards. Regulatory frameworks such as UN regulations, NCAP standards, ISO norms, and NHTSA guidelines impose strict bounds on system reaction times to ensure safe vehicle operation. This paper presents a structured, White-Box methodology based on Event-Chain Modeling to address these timing challenges. Unlike Black-Box approaches, Event-Chain Analysis offers transparent insights into the timing behavior of each functional component - from perception and planning to actuation and human interaction. This perspective is also aligned with multiple regulations, which require that homologation dossiers provide evidence that the chosen system architecture is suitable to ensure compliance with the specified requirements. Our methodology enables the derivation, modeling, and validation of end-to-end timing constraints at the architectural level and facilitates early verification through simulation. Through a detailed case study, we demonstrate how this Event-Chain-centric approach enhances regulatory compliance, optimizes system design, and supports model-based safety analysis techniques, with results showing early identification of compliance issues, systematic parameter optimization, and quantitative evidence generation through probabilistic analysis.