Time and Frequency (T&F) services are critical to many civil and industrial sectors, both directly and indirectly, including telecommunications, geo-positioning (autonomous vehicles), energy, finance, and advanced scientific use cases. Access to precise time and frequency signals is, therefore, of major interest to industry, research and the economy worldwide. In the past few years, National Metrology Institutes (NMIs) have successfully developed and tested new T&F techniques using optical fibres which have shown a stability performance of at least three orders of magnitude better than the current best commercial services. Moreover, such techniques offer an alternative to Global Navigation Satellite System (GNSS) for end-users who cannot rely on broadcast signals due to, for example, security concerns such as GPS spoofing attacks or reception issues if they are located in an underground laboratory. Further, new T&F services have the potential to respond effectively to the challenges of tomorrow.
Many NRENs are now either supporting T&F services for their users, such as National Metrology Institutes (NMIs), or considering how they might do so. The work of this subtask is documenting existing practices and discussing best future practices. If you are interested in discussing OTFN further with us, please get in touch.
*** Infoshare ***
Krzysztof Turza, Wojbor Bogacki, Poznan Supercomputing and Networking Center, Poznan, Poland, IEEE IFCS - EFTF 2023, Toyama, Japan, 15-19 May 2023
GÉANT Infoshare March 9, 2021
"Time & Frequency (T&F) transport as an optical service has become a hot topic for the past ten years, mainly boosted by a dramatic improvement in performance. National Metrology Institutes (NMIs) in collaboration with NRENs have demonstrated three orders of magnitude higher stability of time and frequency services than any existing commercial service over distances of at least 1,500 km, offering tremendous potential for new services in a wide range of scientific, societal and economic domains.
The Technology Readiness Level (TRL) for such T&F services is in some cases now approaching 8 (complete and qualified) or 9 (proven in operational environment), while the growth of metrological links all around the world has motivated more and more optical equipment vendors to integrate T&F features into their product portfolios. However, there is no one-fits-all solution for how to deploy T&F services. Rather, there are multiple T&F setups (unidirectional, bidirectional, quasi-bidirectional), parts of the spectrum (S-, C-, L-Band or in between), each dictated by the distinctive needs and requirements of the networks and the end-user applications. Read more...