From: Roland Hieber Date: Mon, 23 Dec 2013 23:24:24 +0000 (+0100) Subject: Example stream between a sensor node and a client, final tweaks X-Git-Tag: final X-Git-Url: https://git.rohieb.name/skm-ma-ws1314.git/commitdiff_plain/94cb4638c0b154bba68386a18eb63dfa12460a25 Example stream between a sensor node and a client, final tweaks --- diff --git a/fig-example-xmpp-stream.tex b/fig-example-xmpp-stream.tex new file mode 100644 index 0000000..15de658 --- /dev/null +++ b/fig-example-xmpp-stream.tex @@ -0,0 +1,63 @@ +\makeatletter \def\verbatim@font{\sffamily\scriptsize} \makeatother + +\begin{figure}[tp] + \small\centering +\begin{tabular}{p{5cm}p{5cm}} +Client to Device $\rightarrow$ & $\leftarrow$ Device to Client\\ + +\begin{verbatim} + +\end{verbatim} & \\ + + & \begin{verbatim} + +\end{verbatim} \\ + +\begin{verbatim} + + + + + + + +\end{verbatim} & \\ + + & \begin{verbatim} + + +\end{verbatim} \\ + + & \begin{verbatim} + + + + + + + + + + +\end{verbatim} \\ + +\begin{verbatim} + +\end{verbatim} & \\ + + & \begin{verbatim} + +\end{verbatim} \\ +\end{tabular} + \caption{Example XMPP stream with sensor data (XEP-0323)} + \label{fig:examplexmpp} +\end{figure} +% vim: set ft=tex et ts=2 sw=2 : diff --git a/sec-chatty-things.tex b/sec-chatty-things.tex index da27fbe..9ac3428 100644 --- a/sec-chatty-things.tex +++ b/sec-chatty-things.tex @@ -46,8 +46,6 @@ The resulting implementation (uXMPP and uBonjour) gets by with 12{.}2\ kBytes of ROM and 0{.}63\ kBytes of RAM, which was about the size of the original, unoptimized uXMPP implementation while also implementing new features. -\todo{figure of example network structure with and without central server} - In order to react to different network infrastructures, their implementation allows both communication with a central XMPP server as well as peer-to-peer communication over XMPP Serverless Messaging. When a central XMPP server is diff --git a/sec-discussion.tex b/sec-discussion.tex index 0f05d0c..2b26283 100644 --- a/sec-discussion.tex +++ b/sec-discussion.tex @@ -24,15 +24,6 @@ interested in specific values then only needs to communicate with a single node in the network. \paragraph{Sensor Data (XEP-0323)~\cite{xep0323}} -%\begin{figure} - %\caption{Example stream between a sensor node and a client} - %\label{fig:streamexample} - %\begin{verbatim} -%Client Device -% - - %\end{verbatim} -%\end{figure} This XEP specifies a way of reading out values from a sensor node. It allows to specify multiple data sources (e.~g. temperature, humidity) as well as multiple types of data (e.~g., momentary values, historical @@ -43,6 +34,14 @@ accepts the request by returning a corresponding IQ stanza. If it has accepted the request, it reads out the requested data and returns it in a subsequent message stanza to the client. +An example of this protocol can be seen in Figure~\ref{fig:examplexmpp}: after +both clients have opened their streams, the client requests the momentary values +for power and energy from the node named \emph{Device04}. The device first +acknowledges this request, and, after retrieving the values, sends them back +to the client. + +\input{fig-example-xmpp-stream.tex} + \paragraph{Control (XEP-0325)~\cite{xep0325}} In this document, a way of controlling sensor nodes is specified, which allows a client to get and set control values on the node over message or IQ stanzas. As an example, in this @@ -75,9 +74,6 @@ it is to be noted that this requires further implementation of compression algorithms as well as additional CPU and memory resources and thus might decrease message throughput and increase power consumption on embedded systems. - -\todo{example XML stream with sensor data} - \subsection{Related Approaches} ``Chatty Things'' is not the only approach to implement communication in diff --git a/sec-dns-extensions.tex b/sec-dns-extensions.tex index dae9770..86bc75c 100644 --- a/sec-dns-extensions.tex +++ b/sec-dns-extensions.tex @@ -47,10 +47,6 @@ SRV~\cite{rfc2782} and PTR in a way that allows hosts to browse for services in a domain. This is a two-step process, consisting of \term{Service Instance Enumeration} and \term{Service Instance Resolution}. -%\todo{XMPP is a probably not the best example here, use IPP instead} -%\begin{subfigure} \end{subfigure} \begin{figure}[top] \centering -%\includegraphics[width=0.9\textwidth]{fig-dnssd-mock.jpg} \caption{DNS-SD: -%Service Instance Enumeration and Resolution} \label{fig:dnssd} \end{figure} \paragraph{1. Service Instance Enumeration} At first, to enumerate the available services in a domain for a given protocol, a DNS-SD-enabled client queries PTR resources of the form \code{\_service.\_proto.domain}. The result of diff --git a/sec-xmpp.tex b/sec-xmpp.tex index 9f1749a..fbc1dbe 100644 --- a/sec-xmpp.tex +++ b/sec-xmpp.tex @@ -84,8 +84,6 @@ other side then has the chance to send all outstanding stanzas and then likewise closes its stream. If both streams are closed, the underlying TCP connection is terminated. -%\todo{see section... for example stream} - \subsubsection{Publish/Subscribe and Presence} Typically, a user wants to chat with a more or less fixed set of other users,