Presentation at 6G Conference 2025, Berlin, Germany, July 3rd, 2025
GNSS is widely used for data transmission and synchronization—particularly in applications, such as vehicles and drones, where merging recorded radar data and coordinating multiple nodes over-the-air is essential. Accurate time-stamping is crucial to ensure data integrity, which requires a reliable and common time source. However, GNSS connectivity can be limited or completely unavailable in challenging environments like tunnels or urban canyons, making precise synchronization difficult.
In this presentation, MLE showcases our approach to synchronize devices using PTP-based application layer time synchronization over 5G sidelink. We walk through the approach and implications of correlating PTP messages with 5G PHY layer frame timing, and briefly touch on a method for further improving the timestamp accuracy. In the end, we present our proof-of-concept demonstrator setup developed in collaboration with Fraunhofer HHI, along with initial experimental results, demonstrating microsecond-level time synchronization accuracy via PTP over 5G sidelink. Notably, this approach relies purely on existing mechanisms and requires no additional modifications to future 6G standards.
To learn more about the details, download the slides below or contact us for more information.