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First draft of Intro slides to WR Workshop 12

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\documentclass[compress, red]{beamer}
\mode<presentation>
\usepackage{etex}
\setbeamertemplate{navigation symbols}{}
%\usepackage{pgfpages}
%\usepackage{listings}
\usetheme{Warsaw}
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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}
\newcommand{\backupbegin}{
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}
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\graphicspath{ {../../figures/} }
\usepackage[font=small,skip=0pt]{caption}
\captionsetup{labelformat=empty,labelsep=none}
%\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}
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