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Commit 3f398848 authored by Javier Serrano's avatar Javier Serrano
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Add details on Open Science and WRC members

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presentations/WRC_Javier_Paris_2024_10_02/wrc_paris_2024_10_02.tex
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......@@ -102,97 +102,39 @@
\tableofcontents
\end{frame}
\section[Why]{The need for synchronisation}
\section[Intro to CERN]{Introduction to CERN}
\subsection{}
%=======================
\begin{frame}{Why we need good synchronisation at CERN}
\begin{center}
\includegraphics[width=\textwidth]{misc/synchrotron.jpg}
\end{center}
\begin{frame}{Accelerators}
\begin{center}
\includegraphics[height=0.85\textheight]{misc/accelerator_map.jpg}
\end{center}
\end{frame}
\begin{frame}{Large High Altitude Air Shower Observatory (LHAASO)}
\begin{center}
\includegraphics[height=0.7\textheight]{applications/lhaaso.pdf}
\end{center}
\begin{frame}{Detectors}
\begin{center}
\includegraphics[height=0.85\textheight]{misc/atlas.jpeg}
\end{center}
\end{frame}
\begin{frame}{Dissemination}
\begin{center}
\includegraphics[height=0.8\textheight]{misc/cern_council.jpg}
\end{center}
\end{frame}
\begin{frame}{Cherenkov Telescope Array (CTA)}
\begin{center}
\includegraphics[height=0.8\textheight]{applications/cta.pdf}
\end{center}
\begin{frame}{How to interpret one's dissemination mandate in the 21\textsuperscript{st}
century}
\begin{center}
\includegraphics[height=0.8\textheight]{misc/cern_and_openness.jpg}
\end{center}
\end{frame}
\begin{frame}{Cubic Kilometre Neutrino Telescope (KM3NeT)}
\begin{center}
\includegraphics[height=0.8\textheight]{applications/KM3NeT.pdf}
\end{center}
\end{frame}
\begin{frame}{And of course also outside Physics}
\begin{block}{Some examples}
\begin{itemize}
\item Electric power distribution
\item Finance (time-stamping of transactions)
\begin{itemize}
\item to comply with the law (MiFID II)
\item as a service to customers of e.g. a stock exchange
\end{itemize}
\item Telecom
\end{itemize}
\end{block}
\end{frame}
\section[How]{A quick primer on synchronisation solutions}
\section{White Rabbit}
\subsection{}
\begin{frame}{Global Navigation Satellite Systems (GNSS)}
\begin{center}
\includegraphics[height=0.8\textheight]{misc/GPS_Satellite_NASA_art-iif.jpg}
\end{center}
\end{frame}
\begin{frame}{GNSS jamming and spoofing}
\begin{center}
\includegraphics[height=0.8\textheight]{misc/gps_spoofing.png}
\end{center}
\tiny Courtesy J.M. Friedt
\end{frame}
\begin{frame}{Precision Time Protocol (IEEE 1588)}
\begin{columns}[c]
\column{.4\textwidth}
\begin{center}
\includegraphics<1>[height=5cm]{protocol/ptp_exchange-enhanced.jpg}
\includegraphics<2->[height=4cm]{protocol/ptpNetwork.jpg}
\end{center}
\column{.75\textwidth}
\begin{itemize}
\item Frame-based synchronisation protocol
\item Simple calculations:
\begin{itemize}
\item link delay: $\delta_{ms} = \frac{(t_{4}-t_{1}) - (t_{3}-t_{2})}{2}$
\item offset from master: $OFM = t_{2} - (t_{1} + \delta_{ms})$
\end{itemize}
\item<2-> Hierarchical network
\item<3-> Shortcomings of traditional PTP:
\begin{itemize}
\item devices have free-running oscillators
\item frequency drift compensation traffic can compromise determinism of
other messages
\item assumes symmetry of medium
\item resolution of timestamps
\end{itemize}
\end{itemize}
\end{columns}
\end{frame}
\section{White Rabbit}
\subsection{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{What is White Rabbit?}
......@@ -224,7 +166,7 @@
% \item Number of nodes: $\leq$2000
% \end{itemize}
\item \textbf{Open Source and commercially available}
\item \textbf{Open source and commercially available}
% \item<9-> Many users worldwide, inc. metrology labs...
\end{itemize}
......@@ -275,80 +217,6 @@
\end{block}
\end{frame}
\begin{frame}{Layer 1 Syntonisation}
%\begin{block}{Common clock for the entire network}
\begin{itemize}\small
\item Clock is encoded in the Ethernet carrier and recovered by the receiver chip
\item All network devices use the same physical layer clock
\item Clock loopback allows phase detection to enhance precision of timestamps
% \item Phase detection allows sub-ns delay measurement
\end{itemize}
%\end{block}
\vspace{-0.2cm}
\begin{center}
\includegraphics<1>[height=5cm]{misc/synce_v3.pdf}
% \includegraphics[height=4.5cm]<2>{p1588/1588-ha-L1vsPTP-simplified.jpg}
\end{center}
\end{frame}
\begin{frame}{Digital Dual Mixer Time Difference (DDMTD)}
\begin{itemize}
\item Precise phase measurements in FPGA
\item WR parameters:
\begin{itemize}\scriptsize
\item $clk_{in}~~~~~~~~=62.5$~MHz
\item $clk_{DDMTD}=62.496185$~MHz (N=14)
\item $clk_{out}~~~~~~=~~3.814$~kHz
\end{itemize}
\item Theoretical resolution of 0.977~ps
\end{itemize}
\vspace{-0.2cm}
\begin{center}
\includegraphics[width=\textwidth]{misc/ddmtd_3.jpg}
\end{center}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \begin{frame}{SoftPLL}
% \begin{center}
% \includegraphics[width=.9\textwidth]{protocol/dmpll_diagram-slides.pdf}
% \end{center}
% \end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Link delay model}
\begin{columns}
\column{.65\textwidth}
\footnotesize
\begin{itemize}
\item <1->Correction of Round Trip Time (RTT) for asymmetries
\item <2->Asymmetry sources: FPGA, PCB, electrical/optical conversion,
chromatic dispersion
\item <3->Link delay model:
\begin{itemize}\scriptsize
\item \textbf{Fixed delays} -- calibrated/measured
\item \textbf{Variable delays} -- evaluated online with:\vspace{0.1cm} $\alpha = \frac{\nu_g(\lambda_s)}{\nu_g(\lambda_m)} -1 = \frac{\delta_{ms} - \delta_{sm}}{\delta_{sm}}$
\end{itemize}
\item <4-> Accurate offset from master (OFM):\scriptsize \\\vspace{0.2cm}
% $RTT=(t_{4}-t_{1}) - (t_{3}-t_{2})$\\
$\delta_{ms}~ = \frac{1 + \alpha}{2 + \alpha} \, (RTT - \sum \Delta - \sum \epsilon)$\vspace{0.2cm}
$OFM = t_{2} - (t_{1} + \delta_{ms} + \Delta_{txm} + \Delta_{rxs} + \epsilon_S)$
\end{itemize}
\column{.5\textwidth}
\begin{center}
\includegraphics<1>[width=1.0\textwidth]{protocol/link-delay-model-detailed-1.jpg}
\includegraphics<2>[width=1.0\textwidth]{protocol/link-delay-model-detailed-2.jpg}
\includegraphics<3->[width=1.0\textwidth]{protocol/link-delay-model-detailed-3.jpg}\\\pause\pause\pause
%\tiny See: \textit{WR Calibration} [9]
\end{center}
\end{columns}
% \pause\pause\pause\pause
% \scriptsize See: \textit{WR Calibration}, version 1.1, G.Daniluk
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Community}
\subsection{}
......@@ -371,7 +239,7 @@
A technology supported by a friendly community working on a fully open-source
implementation of IEEE 1588-2019 High-Accuracy (HA) profile, with a guaranteed
sub-nanosecond accuracy.
sub-nanosecond accuracy
\end{center}
\end{frame}
......@@ -392,9 +260,9 @@
\begin{frame}{The White Rabbit Collaboration in a nutshell}
\begin{block}{Ensuring sustainability}
\begin{itemize}
\item Members pay a yearly fee and shape the future of the technology.
\item Members pay a yearly fee and shape the future of the technology
\item Fees are used to pay the WR Collaboration Bureau, which offers
support (including training) and ensures WRS and WRPC are always in good health.
support (including training) and ensures WRS and WRPC are always in good health
\end{itemize}
\end{block}
\end{frame}
......@@ -427,9 +295,11 @@
\begin{frame}{The White Rabbit Collaboration in a nutshell}
\begin{block}{Projects! Some examples:}
\begin{itemize}
\item Mobile (e.g. TDD on 5G)
\item Quantum: see e.g. CERN's Quantum Tech Initiative at \href{https://quantum.cern/}{https://quantum.cern/}
\item Smart grids
\item Ongoing:
\href{https://www.gmv.com/en/communication/news/gmv-awarded-ps2-million-contract-provide-white-rabbit-switch-suited-protecting}{\color{blue}{collaboration
with GMV and IQD}} on hold-over.
\item Quantum: see e.g. CERN's Quantum Tech Initiative at \href{https://quantum.cern/}{https://quantum.cern}
\item Under discussion: robust, long-distance WR for smart grids
\end{itemize}
\end{block}
\end{frame}
......@@ -441,12 +311,27 @@
\item Impact and sustainability
\end{itemize}
\end{block}
\begin{block}{Economics}
\begin{itemize}
\item Companies can add value of top of WR and monetise products based on
those developments
\item They decide what they contribute as open source and what they keep
proprietary
\end{itemize}
\end{block}
\end{frame}
\begin{frame}{WRC members in 2024}
\begin{center}
\includegraphics[width=\textwidth]{wr-collaboration/wrc_members_2024.pdf}
\end{center}
\end{frame}
\begin{frame}{White Rabbit Collaboration}
\begin{center}
\includegraphics[height=0.5\textheight]{logo/WRC_logo_all_blue_on_white.jpg}
\\For more details, see\\\href{https://www.white-rabbit.tech/}{https://www.white-rabbit.tech/}
\\Join us! For more details, see\\\href{https://www.white-rabbit.tech/}{https://www.white-rabbit.tech}
\end{center}
\end{frame}
......@@ -504,30 +389,154 @@
\end{block}
\end{frame}
\begin{frame}{Possibilities for collaboration}
\begin{block}{For discussion:}
\begin{frame}{Possibilities for collaboration: non-exhaustive list}
%\begin{block}{Non-exhaustive list:}
\begin{itemize}
\item Telecom: support for G.8275.1 PTP profile, higher rate for PTP
frames, improvements in BMCA, ESMC support, live reconfiguration\ldots
See \href{https://indico.cern.ch/event/1379641/contributions/5863218/}{\color{blue}{presentation}} of Marek Brawański at the 13th WR Workshop.
\item Quantum: both QKD and entangled qubits
\item Monitoring and logging of important parameters and events with time stamps
\item Automation of calibration of port delays and fibre asymmetry
\item Robustness: hardware and system-wide (clock ensemble). Redundancy and
seamless switch-over ($<$1ns jump). See
\href{https://www.gmv.com/en/communication/news/gmv-awarded-ps2-million-contract-provide-white-rabbit-switch-suited-protecting}{\color{blue}{work
with GMV and IQD}} on hold-over.
\item Best practices for long-distance WR
seamless switch-over ($<$1ns jump)
\item Best practices for long-distance WR, in combination or not with weak
signals for quantum networking
\item Testing and qualification laboratory
\item Other?
\end{itemize}
\end{block}
%\end{block}
\end{frame}
\appendix
\backupbegin
%% \begin{frame}{Backup slides}
%% \begin{center}
%% Backup slides
%% \end{center}
%% \end{frame}
\begin{frame}{Backup slides}
\begin{center}
Backup slides
\end{center}
\end{frame}
\begin{frame}{Precision Time Protocol (IEEE 1588)}
\begin{columns}[c]
\column{.4\textwidth}
\begin{center}
\includegraphics<1>[height=5cm]{protocol/ptp_exchange-enhanced.jpg}
\includegraphics<2->[height=4cm]{protocol/ptpNetwork.jpg}
\end{center}
\column{.75\textwidth}
\begin{itemize}
\item Frame-based synchronisation protocol
\item Simple calculations:
\begin{itemize}
\item link delay: $\delta_{ms} = \frac{(t_{4}-t_{1}) - (t_{3}-t_{2})}{2}$
\item offset from master: $OFM = t_{2} - (t_{1} + \delta_{ms})$
\end{itemize}
\item<2-> Hierarchical network
\item<3-> Shortcomings of traditional PTP:
\begin{itemize}
\item devices have free-running oscillators
\item frequency drift compensation traffic can compromise determinism of
other messages
\item assumes symmetry of medium
\item resolution of timestamps
\end{itemize}
\end{itemize}
\end{columns}
\end{frame}
\begin{frame}{Layer 1 Syntonisation}
%\begin{block}{Common clock for the entire network}
\begin{itemize}\small
\item Clock is encoded in the Ethernet carrier and recovered by the receiver chip
\item All network devices use the same physical layer clock
\item Clock loopback allows phase detection to enhance precision of timestamps
% \item Phase detection allows sub-ns delay measurement
\end{itemize}
%\end{block}
\vspace{-0.2cm}
\begin{center}
\includegraphics<1>[height=5cm]{misc/synce_v3.pdf}
% \includegraphics[height=4.5cm]<2>{p1588/1588-ha-L1vsPTP-simplified.jpg}
\end{center}
\end{frame}
\begin{frame}{Digital Dual Mixer Time Difference (DDMTD)}
\begin{itemize}
\item Precise phase measurements in FPGA
\item WR parameters:
\begin{itemize}\scriptsize
\item $clk_{in}~~~~~~~~=62.5$~MHz
\item $clk_{DDMTD}=62.496185$~MHz (N=14)
\item $clk_{out}~~~~~~=~~3.814$~kHz
\end{itemize}
\item Theoretical resolution of 0.977~ps
\end{itemize}
\vspace{-0.2cm}
\begin{center}
\includegraphics[width=\textwidth]{misc/ddmtd_3.jpg}
\end{center}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \begin{frame}{SoftPLL}
% \begin{center}
% \includegraphics[width=.9\textwidth]{protocol/dmpll_diagram-slides.pdf}
% \end{center}
% \end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{Link delay model}
\begin{columns}
\column{.65\textwidth}
\footnotesize
\begin{itemize}
\item <1->Correction of Round Trip Time (RTT) for asymmetries
\item <2->Asymmetry sources: FPGA, PCB, electrical/optical conversion,
chromatic dispersion
\item <3->Link delay model:
\begin{itemize}\scriptsize
\item \textbf{Fixed delays} -- calibrated/measured
\item \textbf{Variable delays} -- evaluated online with:\vspace{0.1cm} $\alpha = \frac{\nu_g(\lambda_s)}{\nu_g(\lambda_m)} -1 = \frac{\delta_{ms} - \delta_{sm}}{\delta_{sm}}$
\end{itemize}
\item <4-> Accurate offset from master (OFM):\scriptsize \\\vspace{0.2cm}
% $RTT=(t_{4}-t_{1}) - (t_{3}-t_{2})$\\
$\delta_{ms}~ = \frac{1 + \alpha}{2 + \alpha} \, (RTT - \sum \Delta - \sum \epsilon)$\vspace{0.2cm}
$OFM = t_{2} - (t_{1} + \delta_{ms} + \Delta_{txm} + \Delta_{rxs} + \epsilon_S)$
\end{itemize}
\column{.5\textwidth}
\begin{center}
\includegraphics<1>[width=1.0\textwidth]{protocol/link-delay-model-detailed-1.jpg}
\includegraphics<2>[width=1.0\textwidth]{protocol/link-delay-model-detailed-2.jpg}
\includegraphics<3->[width=1.0\textwidth]{protocol/link-delay-model-detailed-3.jpg}\\\pause\pause\pause
%\tiny See: \textit{WR Calibration} [9]
\end{center}
\end{columns}
% \pause\pause\pause\pause
% \scriptsize See: \textit{WR Calibration}, version 1.1, G.Daniluk
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{WR and open source}
\begin{center}
\includegraphics[width=\textwidth]{ohwr/commercial_and_open.pdf}
\end{center}
\end{frame}
\begin{frame}{Public-private partnerships}
\begin{center}
\includegraphics[width=\textwidth]{public_core/lifting_floor_for_everyone.pdf}
\end{center}
\end{frame}
\begin{frame}{Public-private partnerships}
\begin{center}
\includegraphics[width=\textwidth]{public_core/public_core_time_dimension.pdf}
\end{center}
\end{frame}
\backupend
......
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