Abstract
The scope of automotive functions has grown from a single vehicle as an entity to multiple vehicles working together as an entity, referred to as cooperative driving. The current automotive safety standard, ISO 26262, is designed for single vehicles. With the increasing number of cooperative driving capable vehicles on the road, it is now imperative to systematically assess the functional safety of architectures of these vehicles. Many methods are proposed to assess architectures with respect to different quality attributes in the software architecture domain, but to the best of our knowledge, functional safety assessment of automotive architectures is not explored in the literature. We present a method, that leverages existing research in software architecture and safety engineering domains, to check whether the functional safety requirements for a cooperative driving scenario are fulfilled in the technical architecture of a vehicle. We apply our method on a real-life academic prototype for a cooperative driving scenario, platooning, and discuss our insights.
Highlights
Traffic congestion was estimated to cost 305 billion dollars in 2017 to traffic participants in the United States of America.1 With continuously increasing urban population (Alvarez et al, 2017), traffic congestion will continue to be an inevitable problem for the foreseeable future
That leverages existing research in software architecture and safety engineering domains, to check whether the functional safety requirements for a cooperative driving scenario are fulfilled in the technical architecture of a vehicle
This paper presents a method to assess the functional safety of existing automotive architecture for cooperative driving, by combining methods from the safety engineering and software architecture domains
Summary
Traffic congestion was estimated to cost 305 billion dollars in 2017 to traffic participants in the United States of America. With continuously increasing urban population (Alvarez et al, 2017), traffic congestion will continue to be an inevitable problem for the foreseeable future. One potential solution to reduce traffic congestion and such operational costs is cooperative driving. Functional safety is defined by two standards: ISO 26262:2018 and ISO 21448 (ISO, 2019), serving complementary purposes. The former focuses on the hazards caused by the malfunctioning of components of a system, while the latter does on the hazards resulting from the functional insufficiency and misuse (ISO, 2018, 2019). ISO 21448 (ISO, 2019), is currently available as ISO/PAS 21448 specifications with a formal release planned in 2021 The predecessor of these standards is the broader IEC 61508 standard (IEC, 2010), which outlines the functional safety guidelines for developing electrical/electronic/programmable electronic systems that are used to carry out safety functions (IEC, 2010)
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