Abstract
Research and/or Engineering Questions/Objective:
New Car2X technology and applications come with new requirements for diagnostics over the entire chain of participants and communication, taking particularly into account that the chain will contain OEM-independent participants. These so-called end-2-end diagnostics involve remote data-exchange initiated by driver, car, or server-side applications. Thus, end-2-end diagnostics will have impact on the functional safety of a car. Concepts for end-2-end diagnostics have to be verified and amended with respect to ISO26262 requirements.
Methodology:
We have developed an overall concept for end-2-end diagnostics consisting of requirements to onboard and offboard diagnostics, Car2X communication, server-side applications, processes and exchange formats. This concept results from a thorough analysis of existing Car2X solutions and the diagnostic support provided for them by their respective manufacturers, plus the application of years of experience in the consulting, design, specification, and development of automotive diagnostic systems and processes, as well as in the development of server-side Car2X systems and applications.
Results:
In the paper we will present the overall concept for end-2-end diagnostics and explain the use-cases that are covered in the concept. We will discuss the aspects of functional safety in this concept for every system and process that involve Car2X communication, like e.g. remote analysis of fault-memory and remote updating of ECU software. Where applicable, we will show options for amendments to systems and processes to make them functionally safe.
Limitations of this study:
While the concept has been carefully designed to encompass existing Car2X diagnostic solutions, and to employ or extend e.g. existing standards for data and information exchange, it has not yet been implemented at any particular automotive manufacturer. We are currently in discussion with some of our customers to start a project for its implementation.
What does the paper offer that is new in the field including in comparison to other work by the authors:
The overall concept end-2-end diagnostics with particular focus on OEM-independency is in itself a new result. While the individual results underlying this presentation have already been presented elsewhere, i.e. concept for end-2-end diagnostics, aspects of functional safety in automotive diagnostics, server-side Car2X applications, the combination and mutual application of the three into one overall analysis is presented for the first time.
Conclusions:
New Car2X technology and applications come with new requirements for diagnostics over the entire chain of participants and communication. A concept is presented for end-2-end diagnostics with particular focus on the aspects of functional safety contained therein.
KEYWORDS – Car2X, Functional Safety, ISO 26262, End-2-end diagnostics