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17 \title{Chatty Things -- Making the Internet of Things Readily Usable for the
19 \author{Roland Hieber
}
20 \date{Seminar Communications and Multimedia, TU~Braunschweig \\
[1em
] \today}
26 \section{Introduction
}
29 short overview, not too long: what do we want, what are we
32 basically: how do we talk to our smart home?
35 \section{Prerequisites
}
37 overview to the techniques used in the paper by Klauk and Kirsche
39 \cite{klauck-kirsche-chattythings
}
41 \input{address-allocation.tex
}
42 \input{dns-extensions.tex
}
45 \section{System Architecture of Chatty Things
}
48 \subsection{Service Provisioning Sublayer
}
49 \subsection{Bootstrapping
}
50 \subsection{Presence Subscription
}
52 \section{Related Approaches
}
55 Middleware, Application protocol gateways:
57 \item Constrained Application Protocol
\cite{draft-ietf-core-coap-
18}
59 \item machine-to-machine
60 \item everything-built-in
61 \item discovery over multicast, service discovery over /.well-known
63 \item maps to HTTP => stateless
64 \item low protocol overhead and parsing complexity (binary messages)
65 \item only draft status
66 \item UDP with Ack and IDs instead of TCP... (limited state machine)
68 \item asynchronous messages
70 \item MQ Telemetry Transport
\cite{mqtt
}
73 \item small overhead:
2 byte header + variable header length
74 \item publish-subscribe with topic names
78 \item Devices Profile for Web Services
\cite{zeeb-moritz-ws4d
}
80 \item TCP/IP -> HTTP -> SOAP -> Web Services. Overhead!
81 \item but very extendable and composable
82 \item discovery as a service
83 \item focused on multiple platforms, deeply embedded and servers
84 \item IPv6 partly experimental
85 \item ROM usage of uDPWS:
45 kByte
92 comparison of mentioned approaches
96 \bibliographystyle{plain
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