Hi,
We are developing an application that requires synchronization between two or more nRF9160-based devices. We have the following requirements and constraints:
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Required time synchronization accuracy: < 1 ms
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GNSS is not available — devices are deployed underground without access to an external antenna
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Both devices connect via LTE-M / NB-IoT
We have the following questions:
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What is the expected accuracy of SNTP time synchronization over LTE on the nRF9160?
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What is the expected accuracy of LTE network time received via NITZ or SIB16 (configurable via
AT%XNETTIME)? -
Are either of these solutions capable of meeting our < 1 ms accuracy requirement?
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Are there any other Nordic-supported time synchronization solutions that could meet our accuracy requirement given our constraints?
Any guidance or alternative approaches would be greatly appreciated.
Thank you.