Time synchronization for an asynchronous embedded CAN network on a multi-processor system on chip

Breaban, Gabriela; Stuijk, Sander; Goossens, Kees

doi:10.1109/ispcs.2017.8056742

Cited by 2 publications

(1 citation statement)

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“…A different approach is investigated in [21] for a CANlike on-chip network in a multi-processor system on chip (SoC). The synchronization protocol is based on a simple synchronization message and partly implemented in hardware.…”

Section: Related Workmentioning

confidence: 99%

Software-Based AUTOSAR-Compliant Precision Clock Synchronization Over CAN

Luckinger

Sauter

2022

IEEE Trans. Ind. Inf.

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Modern cars are characterized by a growing number of sensors, actuators, and advanced driver assistance systems that require a synchronized view of the time. These devices are typically interconnected by CAN which is still the most important in-vehicle network. Precise clock synchronization over CAN is difficult due to the properties of the bus, and current approaches often use dedicated hardware or proprietary software solutions. A few years ago, however, the AUTOSAR development alliance published a standardized synchronization method.This paper investigates what synchronization precision can be realistically achieved in a real-world automotive hardand software environment. This involves pure software timestamping, standard CAN controllers without hardware modifications, and a typical automotive real-time operating system. We evaluate several approaches to reduce the synchronization jitter using filtering and optimizing the timestamping procedure. Experiments show that ultimately, a precision better than 50 microseconds can be achieved with a fully AUTOSAR-compliant software implementation.

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Section: Related Workmentioning

confidence: 99%