First draft of Intro slides to WR Workshop 12

presentations/WR_Javier_Intro_WRWS12/Makefile

+all : wr_ws12_intro_2022_10.pdf
+
+.PHONY : all clean
+
+wr_ws12_intro_2022_10.pdf : wr_ws12_intro_2022_10.tex
+	pdflatex $^
+	pdflatex $^
+
+clean :
+	rm -f *.eps *.pdf *.dat *.log *.out *.aux *.dvi *.ps *.nav *.snm *.toc *.vrb *~
+

presentations/WR_Javier_Intro_WRWS12/wr_ws12_intro_2022_10.tex

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+
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+% include packages
+\usepackage{subfigure}
+\usepackage{multicol}
+\usepackage{amsmath}
+\usepackage{epsfig}
+\usepackage{graphicx}
+\usepackage[all]{xy}
+%\xyoption{arc}
+\usepackage{url}
+\usepackage{multimedia}
+\usepackage{hyperref}
+\usepackage{helvet}
+\usepackage[english]{babel}
+\usepackage[utf8]{inputenc}
+\usepackage{changepage}
+\usepackage{textcomp}
+     
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+\usepackage[font=small,skip=0pt]{caption}
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+%\setlength{\abovecaptionskip}{5pt plus 3pt minus 2pt}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Title Page Info %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\title[White
+  Rabbit \hspace{18em}\insertframenumber/\inserttotalframenumber]{Introduction
+  to White Rabbit and to the Workshop}
+% \subtitle{And some notes on GMT and BST}
+% \author[CERN\hspace{17em} Maciej Lipi\'{n}ski]{Maciej Lipi\'{n}ski}
+% \author[European Organization for Nuclear Research $\mid$  Maciej Lipi\'{n}ski]{Maciej Lipi\'{n}ski}
+% \author[Maciej Lipi\'{n}ski $\mid$ European Organization for Nuclear Research]{Maciej Lipi\'{n}ski}
+\author[Javier Serrano $\mid$ CERN BE-CEM-EDL]{Javier Serrano}
+\institute{European Organisation for Nuclear Research\\(CERN)}
+\date[8 October 2022]{12\textsuperscript{th} White Rabbit Workshop \vspace{0.5cm}\\8 October 2022}
+
+\AtBeginSection[]
+{
+  \begin{frame}<beamer>{Outline}
+    \tableofcontents[currentsection]
+  \end{frame}
+}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Begin Your Document %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{document}
+%\setbeamertemplate{caption}{\raggedright\insertcaption\par}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\frame{\titlepage}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}{A few introductory remarks}
+  \begin{itemize}
+    \item Welcome to CERN!
+    \item We would like to record all talks and need your consent
+    \item Dinner tonight: transportation and payment
+  \end{itemize}
+\end{frame}
+
+\begin{frame}<beamer>{Outline}
+  \tableofcontents
+\end{frame}
+
+
+\section[Intro to WR]{Introduction to White Rabbit}
+\subsection{}
+%=======================
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}{What is White Rabbit?}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{columns}[c]
+	\column{0.65\textwidth}
+\footnotesize
+% \textcolor{white}{dddd dsaf asd fasd fdsa fads f dsa fdsa f dsaf dsa fdsa f dsaf dsaf fds}
+	  \begin{itemize}
+		
+		\item Initiated to renovate CERN's and GSI's accelerator
+                  timing systems
+		\item \textbf{Based on well-established standards}
+		\begin{itemize}\scriptsize
+		  \item Ethernet \textcolor{gray}{(IEEE 802.3)}
+		  \item Bridged Local Area Network \textcolor{gray}{(IEEE 802.1Q)}
+		  \item Precision Time Protocol \textcolor{gray}{(IEEE 1588)}
+		\end{itemize}
+		\item \textbf{Extends standards} to meet new requirements and provides
+		\begin{itemize}\scriptsize
+		\item \color{blue}{Sub-ns synchronisation}
+		\item \color{blue}{Deterministic data transfer}
+		\end{itemize}
+                \item Initial specs: links $\leq$10~km \& $\leq$2000 nodes
+		
+%     \item<7-> Initial network specification:  
+% 		\begin{itemize}\scriptsize
+% 		\item Fiber links length: $\leq$10~km
+% 		\item Number of nodes: $\leq$2000 
+% 		\end{itemize}
+
+    \item \textbf{Open Source and commercially available}
+%     \item<9-> Many users worldwide, inc. metrology labs...
+	  \end{itemize}
+
+% \textcolor{white}{dddd dsaf asd fasd fdsa fads f dsa fdsa f dsaf dsa fdsa f dsaf dsaf fds}
+% \textcolor{white}{dddd dsaf asd fasd fdsa fads f dsa fdsa f dsaf dsa fdsa f dsaf dsaf fds}
+\textcolor{white}{dddd dsaf asd fasd fdsa fads f dsa fdsa f dsaf dsa fdsa f dsaf dsaf fds}
+	\column{0.55\textwidth}
+		\begin{center}
+		\includegraphics[height=0.7\textheight]{network/wr_network-enhanced_pro_without_10km.pdf}
+		
+% 		\includegraphics<3>[width=0.85\textwidth]{misc/LAN.jpg}
+% 		\includegraphics<4>[width=0.8\textwidth]{misc/ieee-1588-ptp-example.jpg}
+% 		\includegraphics<5>[width=1.0\textwidth]{network/WR_network-ethernet.pdf}
+% 		\includegraphics<6->[width=1.0\textwidth]{network/wr_network-enhanced_pro-v2.pdf}
+
+		\end{center}
+	\end{columns}%\small\pause\pause\pause\pause\pause\pause\pause\pause
+% 	     \url{https://www.ohwr.org/projects/white-rabbit/}
+\end{frame}
+%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% \begin{frame}{Open \textbf{and} commercially available off-the-shelf}
+%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% \includegraphics[width=1.0\textwidth]{misc/WR-zoo.jpg}\vspace{-1cm}
+%%  \begin{center}
+%%  \small
+%%  \textbf{Companies selling White Rabbit:} \url{www.ohwr.org/projects/white-rabbit/wiki/wrcompanies}
+%%  \end{center}
+
+%% \end{frame}
+
+
+%% \section{Technology}
+%% \subsection{}
+
+\begin{frame}{White Rabbit technology - sub-ns synchronisation}
+  \begin{block}{Based on}
+    \begin{itemize}
+      \item IEEE 1588 Precision Time Protocol on Gigabit Ethernet over fibre
+    \end{itemize}
+  \end{block}
+  \pause
+  \begin{block}{Enhanced with}
+    \begin{itemize}
+      \item Layer 1 syntonisation
+      \item Digital Dual Mixer Time Difference (DDMTD)
+      \item Link delay model
+    \end{itemize}
+  \end{block}
+\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}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\section[WR Community]{The White Rabbit Ecosystem and Community}
+\subsection{}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% Open Source Hardware, Gateware and Software
+% Introduce Public Core: proprietary innovation in the periphery
+% Open and commercial slide
+% The importance of standards: not always easy
+% Communication in forums: what's going on?
+
+\begin{frame}{Redefining \emph{White Rabbit}}
+  \begin{itemize}
+   \item WR has been used to refer to a community, a project, a technology and a protocol.
+   \item The ideas of the WR technology and protocol were generalised and
+     included in the High Accuracy (HA) Profile of IEEE 1588-2019.
+   \item WR gear (Switch and PTP Core) is progressively adopting IEEE 1588-2019
+     HA (while still supporting the original, so-called ``WR'' protocol) through
+     new releases of gateware and software. The original protocol will only be
+     kept for compatibility.
+  \end{itemize}
+\end{frame}
+
+\begin{frame}{Redefining \emph{White Rabbit}}
+  \begin{block}{We are redefining White Rabbit to mean:}
+     A friendly, welcoming community which:
+   \begin{itemize}
+      \item implements IEEE 1588-2019 HA with a guarantee that the accuracy of
+        the resulting synchronisation is better than one nanosecond;
+      \item does so in a fully open-source way, using OSI-approved licences for
+        hardware, gateware, firmware and software.
+   \end{itemize}
+   and the technological ecosystem resulting from that implementation.
+  \end{block}
+\end{frame}
+
+\begin{frame}{Dispelling the commercial vs open myth}
+ \begin{center}
+   \includegraphics[width=\textwidth]{ohwr/commercial_and_open.pdf}
+ \end{center} 
+\end{frame}
+
+\begin{frame}{Public Core}
+  \begin{center}
+    \includegraphics[height=0.8\textheight]{public_core/public_core.pdf}
+  \end{center}
+
+\end{frame}
+
+
+\begin{frame}{The commons as ground to build upon}
+  \begin{center}
+    \includegraphics[width=\textwidth]{public_core/lifting_floor_for_everyone.pdf}
+  \end{center}
+
+\end{frame}
+
+\begin{frame}{The time dimension}
+  \begin{center}
+    \includegraphics[width=\textwidth]{public_core/public_core_time_dimension.pdf}
+  \end{center}
+
+\end{frame}
+
+\begin{frame}{A quick assessment after 13 years}
+  \begin{block}{Things that went (very) well}
+    \begin{itemize}
+      \item WR works!
+      \item Lots of users and many contributors
+      \item Used beyond Big Physics, very versatile standard technology  
+    \end{itemize}
+  \end{block}  
+  \begin{block}{Things we can improve}
+    \begin{itemize}
+      \item Permanent staffing and quick response to merge and support requests
+      \item Model to collaborate with time-providing companies
+      \item Opportunities for even bigger impact  
+    \end{itemize}
+  \end{block}  
+\end{frame}
+
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\section{This Workshop}
+\subsection{}
+
+\begin{frame}{This Workshop}
+  \begin{itemize}
+  \item Very informal event. Online attendees: please mute your mic when not speaking.
+    \item Speakers:
+      \begin{itemize}
+       \item Please upload your slides to \textcolor{blue}{
+         \href{https://ohwr.org/project/white-rabbit/wikis/Oct2022Meeting}{https://ohwr.org/project/white-rabbit/wikis/Oct2022Meeting}}
+         if you have the rights or send them to me so I do it.
+         \item You are in charge of your time slot, please leave a few minutes
+           for questions at the end.
+      \end{itemize}
+     \end{itemize}
+\end{frame}
+
+\begin{frame}{This Workshop}
+  \begin{itemize}
+    \item Talks on basic building blocks (WR Switch and WR PTP Core) and also
+      about current and future applications of WR.
+     \item Special discussion session at 16:30 CEST today, after Amanda's
+       presentation on the WR Collaboration. Shorter discussion session tomorrow
+       at 16:15 CEST.
+     \end{itemize}
+\end{frame}
+
+
+\begin{frame}{Stay in touch}
+
+  You can stay in touch after the event through the white-rabbit-dev forum:
+  \textcolor{blue}{\href{https://forums.ohwr.org/c/white-rabbit-dev}{https://forums.ohwr.org/c/white-rabbit-dev}}.
+  Discourse can be used in mailing list mode (all categories) or you can watch a
+  certain category (e.g. white-rabbit-dev) and get notified every time somebody
+  posts.
+
+\end{frame}
+
+\end{document}