Tag: Application
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Refimeve et le lapin blanc: French White Rabbit network in the news
The Refimeve network, with its 9000 km of fibre optic cables across the country, connects more than thirty labs, allowing them to synchronise to reference atomic clocks in Paris. Share on Refimeve stands for “Réseau fibre métrologie à vocation européenne” and transmits across its fibre optic network a frequency and time reference from the Observatoire
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CESTime – a White Rabbit nationwide network for Czechia
The academic part of the CESTime network has been launched. In the coming months NIX.CZ, the largest Internet Exchange Point in the country, will enable industry to connect to the CESTime network through its infrastructure.
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Unrepeated White Rabbit Time Synchronisation over a 300 km Optical Fibre Link
Abstract White Rabbit (WR) technology provides a commercially-available off-the-shelf solution for time synchronisation with sub-nanosecond accuracy and picosecond-level precision over optical fibre links typically spanning tens of kilometres. Such high-performance time dissemination can support a variety of applications, including position, navigation and timing (PNT), financial transactions, metrology, as well as entanglement and quantum key distribution
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Synchronization and Coexistence in Quantum Networks
Abstract We investigate the coexistence of clock synchronization protocols with quantum signals in a common single-mode optical fiber. By measuring optical noise between 1500 nm to 1620 nm we demonstrate a potential for up to 100 quantum, 100 GHz wide channels coexisting with the classical synchronization signals. Both “White Rabbit” and pulsed laser-based synchronization protocols were
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High Accuracy Synchronization for Distributed Massive MIMO using White Rabbit
Abstract Accurate synchronization is a crucial prerequisite for wireless communication systems and in particular for spatially distributed massive multiple-input multiple-output (MIMO) systems which is also used in the upcoming 5G mobile communication standard. Many applications based on MIMO transmission, such as communication systems or beamforming methods, require synchronization accuracy in the low sub-nanosecond range which
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White Rabbit Applications and Enhancements
Abstract This article provides a non-exhaustive overview of applications and enhancements to the White Rabbit (WR) extension of the IEEE 1588 Precision Time Protocol (PTP). Initially developed to serve accelerators at the European Or-ganization for Nuclear Research (CERN), WR has become a widely-used synchronization solution in scientific installations. This article classifies WR applications into five
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White Rabbit-Based Time Distribution at NIST
Abstract The National Institute of Standards and Technology (NIST) produces a real-time realization of UTC(NIST) which is used to contribute to Coordinated Universal Time (UTC) and as a source for accurate time in the USA. The atomic clocks contributing to the time scale ensemble, the time transfer systems used to contribute to UTC and the
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White-Rabbit-enabled Data Acquisition System
Abstract This work examines the feasibility of using Ethernet-based time transfer methods based on White Rabbit technology to discipline all the clock domains of a networked data acquisition system (DAQ). Existing systems provide synchronization capabilities, albeit the performance achieved is often not accurate enough for scientific infrastructures and Smart Grid applications requiring frequency coherent and
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White Rabbit Precision Time Protocol on Long-Distance Fiber Links
Abstract The application of White Rabbit precision time protocol (WR-PTP) in long-distance optical fiber links has been investigated. WR-PTP is an implementation of PTP in synchronous Ethernet optical fiber networks, originally intended for synchronization of equipment within a range of 10 km. This paper discusses the results and limitations of two implementations of WR-PTP in