White Rabbit

This document (preliminary version) describes the functional requirements that the White Rabbit Switch must accomplish.

Description of White Rabbit protocol which extends IEEE1588-2008 standard.

The files with White Rabbit specification have been moved to the project White Rabbit Standardization

• WR Specification - latest version
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Attached is a movie from Tomek's demo of White Rabbit during presentation at CERN.

Demo highlights that synchronization in WR is completely plug&play.

The movie is available with a bit better quality here: http://www.youtube.com/watch?v=ZZsEr0TTTEk...

Attached is a movie from Tomek's demo of White Rabbit during presentation at CERN.

Demo demonstrates delay tracking in variable conditions.

Of better quality and in one piece, the movie is available here: http://www.youtube.com/watch?v=ZSRQEExbdq8...

T.Włostowski, Precise time and frequency transfer in a White Rabbit network, 2011.
M.Sc thesis describing the exact synchronization algorithm used in WR and the WR Switch.

This documents puts together some preliminary thoughts about White Rabbit's application to control and provide timing for accelerators at CERN (replacing General Machine Timing).

Posters in conferences, workshops and other meetings.

Presentation and demo done in the context of the CERN Fieldbus Working Group on Thursday 26 January 2012.

Informative contribution prepared for ITU-T Q13/Q15 meeting in Boulder

White Rabbit logo in different formats (including vector graphic) can be found here.

The "*-original" files contain the logo which was drawn by hand and scanned (authored by Alexandra Lewis).
The "*-vectorized" files contain the logo which was re-drawn from the original in Corel Draw to provide useful vector graphic (accepted by the original author).
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Here you can find all the figures used on White Rabbit Project wiki pages.
The sources of the figures and more figures can be found in the repository (here)

Document describing calibration procedures for White Rabbit Devices. Measuring Tx,Rx latencies, hardware and fiber asymmetry.

A small White Rabbit system with two WR SPEC nodes connected to two WR switches was
built. All WR components were independently exposed to temperatures ranging between 0 and
50 degrees Celsius to measure the actual synchronization performance.

A great report by Nikhef's Peter Jansweijer and Henk Peek, with lots of interesting material on Xilinx Gb/s transceivers. See the report stored at its original location: http://www.nikhef.nl/pub/services/biblio/technicalreports/ETR2010-01.pdf

Papers in conferences, workshops and other meetings.

Current version of the WR node functional specification

Presentations in conferences, workshops and other meetings.

A list of WR-related presentation can be found here.

NOTE: The idea of packet pre-emption mentioned in the presentations WR_Tomek_ICALEPCS2009.pdf and WR_Loschmidt_ISPCS2009.pdf is not retained....

A proposal for a portable ptp daemon to be used in both WR-PTP and standard PTP

This document is a study of reliability and robustness of a White Rabbit network.

G. Daniluk, White Rabbit PTP Core the sub-nanosecond time synchronization over Ethernet, 2012.
M.Sc thesis describing the development and implementation of the first standalone HDL module handling the sub-nanosecond synchronization over a regular Ethernet - the White Rabbit PTP Core.
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The documentation of the Gateware (Wishbone) interface for the WR Switch Software.