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IHE / DEV.SDPi

IHE Devices Service-oriented Device Point-of-care Interoperability (SDPi) profiles supplement specification materials and related tooling.
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Time synchronization for real time waveform comparison #205

Open AnnaFeiler opened 1 year ago

AnnaFeiler commented 1 year ago

Our current time synchronization is not sufficient to support real time waveform comparison. Currently, this is not a problem since this is not part of our current use cases. Define a synchronization mechanism for high accuracy time synchronization.

ToddCooper commented 1 year ago

See also the Topic: Precision Time Protocol Option
NTP should be sufficient for these purposes. Issue is related to drifting clocks between the various waveform PROVIDERS, and neither PTP nor NTP address this issue. Topic is under discussion within the SDPi community. Release 1.x is correct.

ToddCooper commented 5 months ago

@PeterKranich -- Any idea of when we should plan on resolving this issue?

PaulMartinsen commented 1 month ago

Issue is related to drifting clocks between the various waveform PROVIDERS, and neither PTP nor NTP address this issue.

My understanding is a complete implementation of NTPv3,4 clock discipline adjusts the tick frequency of the device clock using closed-loop control. This makes me think that NTP may address drifting clocks, at least to some level.