The overall objective of the project is to demonstrate all the metrological steps necessary for the industrial adoption of PTP-WR, including improvement of the devices and the study of an effective implementation in ordinary industrial IT infrastructures without degradation of the performance of the technique compared to the results achieved in controlled research laboratories or using dedicated fibre infrastructures.

The specific objectives of the project are:

  1. To develop improved and scalable calibration techniques for PTP-WR fibre links that are applicable to both existing telecommunication configurations with either a single fibre or with duplex fibres, and enabling the delay asymmetry of the propagation time to be accurately known for a time service competitive with GNSS systems. The target uncertainty for device calibrations is 200 ps, and the target uncertainty for propagation calibration is 1 ns for fibre link lengths up to 1000 km.
  2. To develop validated techniques for redundant and resilient time transfer to industrial end users that meet the recommendations for the timing characteristics of primary reference clocks (ITU T Primary Reference Time Clock (G.8272)) and enhanced Primary Reference Clocks in Telecommunications Networks (PRTC) performance levels during a switch of PTP-WR-GrandMasters and in hold-over situations.
  3. To develop a next generation of PTP-WR devices with improved performance and that interface better with existing industrial protocols and standards such as IEC61850 for Smart Grids. The target frequency instability characterised by an Allan deviation (ADEV) is <1×10-13 over an observation time of 100 s.
  4. To demonstrate the use of PTP-WR to deliver Universal Coordinated Time UTC(k) time scales and frequency in the radio frequency (RF) domain from NMIs to industrial users within a specified market segment, and to evaluate the end-to-end uncertainty of the established time transfer.
  5. To facilitate the take up of the technology and measurement infrastructure developed in the project by the measurement supply chain, in particular to calibration laboratories, standards developing organisations and end users, in particular the telecommunication industry and the National Research and Education Networks.