Publication

Abstract : 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.