Drift Correction for the Software-based Clock Synchronization on Controller Area Network

Synchronizing clocks is crucial for distributed safety-critical in-vehicle applications. Since Controller Area Network (CAN) is the predominant in-vehicle communication bus, it is highly relevant to realize clock synchronization (CS) on CAN. This paper proposes a new software-based CS (SW-CS) algori...

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Bibliographic Details
Main Authors: Akpinar, Murat, Schmidt, Ece Guran, Werner Schmidt, Klaus
Format: Conference Proceeding
Language:English
Subjects:
clock drift
clock synchronization
Clocks
Controller area network
feedback control
Hardware
Nickel
Oscillators
Protocols
Silicon
Synchronization
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Summary:Synchronizing clocks is crucial for distributed safety-critical in-vehicle applications. Since Controller Area Network (CAN) is the predominant in-vehicle communication bus, it is highly relevant to realize clock synchronization (CS) on CAN. This paper proposes a new software-based CS (SW-CS) algorithm based on the periodic transmission of reference messages (RMs) by a Master node and discrete-time feedback control. Different from existing algorithms, that only update clocks after receiving a RM, our algorithm corrects the clock drift between RMs. Measurements on a hardware setup show a decrease of the clock differences by more than one order of magnitude.
ISSN:2642-7389
DOI:10.1109/ISCC50000.2020.9219676