An in-vehicle fault diagnostics system includes several data logging devices that are distributed across the vehicular network. For an off-board analysis, it is important to know the trigger time of the faults. This paper provides a mechanism to establish a temporal relationship of the logged fault data across the vehicle, thereby enabling offline analysis. To support this, the fault data needs to be timestamped with an accurate system-wide reference time. For the purpose of establishing a global reference time within the vehicular network, the time synchronization mechanism as defined by Automotive Open System Architecture (AUTOSAR) is conceptualized in this paper. A reference implementation of the proposed system is analyzed and validated, where a sample diagnostic event is timestamped with the global time base.
S. Raju, Dr. Jeyakumar G., Mukherji, A., and Thanki, J. K., “Time synchronized diagnostic event data recording based on AUTOSAR”, in 2017 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), Bhubaneswar, India, 2017.