12-14 October 2011
Physics Lecture Hall
Europe/Berlin timezone

White Rabbit: Sub-Nanosecond Timing over Ethernet

13 Oct 2011, 12:00
HE (Physics Lecture Hall)


Physics Lecture Hall

Photodetection and readout Parallel Session 4


Henk Peek (NIKHEF (NL))


On behalf of the White Rabbit consortium The White Rabbit (WR) project is a multi-laboratory, multi-company effort to bring the best of the data transfer and the timing world together in a completely open design. White Rabbit is a fully deterministic Ethernet-based network for general purpose data transfer and synchronization. The aim is to be able to synchronize a large number of nodes with sub-nanosecond accuracy and picosecond jitter over long lengths of fiber. The key technologies used are physical layer syntonization (clock recovery) and the Precision Time Protocol (IEEE 1588). It generates sub-nanosecond synchronous precision timing in all nodes by continuous tracking and compensating the fiber transmission delays. This presentation/paper gives an overview of WR and describes the design goals and specification used for the project. It describes the WR switch and the (user) node which are the central components of the WR system. Finally, it presents real timing measurements of prototypes of WR hardware.

Primary authors

Henk Peek (NIKHEF (NL)) Peter Jansweijer (Nikhef)

Presentation Materials

Peer reviewing