What is it about?

We propose a solution to keep clocks of drones synchronized with the ground control station. The solution provides an integration to common methods based on GPS and Network Time Protocol. If the latter are not available or they are compromised by an attack, it is possibile to trigger a synchronization task sending a reference timestamp to all the drones from the ground control station, using sub-GHz radio technologies (e.g., LoRa radios). Such communication technologies are robust against interference and jammings, providing also longer ranges w.r.t. Wi-Fi.

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Why is it important?

The solution we provide is important because GPS signal may be jammed or not available in some scenarios. Morever NTP can introduce noticeable skews between the clocks of the drones.


We hope this work may be useful to other researchers and people working on drones cooperation, helping them to implement robust clocks synchronization solutions.

Ivan Scagnetto
Universita degli Studi di Udine

Read the Original

This page is a summary of: A broadcast sub-GHz framework for unmanned aerial vehicles clock synchronization, Integrated Computer-Aided Engineering, November 2023, IOS Press,
DOI: 10.3233/ica-230723.
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