\subsection{airprobe}

\begin{frame}{Open Source GSM Tools: Airprobe}
\begin{itemize}
	\item {\em airprobe} is a collection of Um protocol analyzer tools using the USRP software defined radio
	\item A number of different Um receiver implementations
	\begin{description}[gsm-receiver]
		\item[gssm] One of the two early Um receiver implementations (M\&M clock recovery)
		\item[gsmsp] The other early Um receiver implementation
		\item[gsm-tvoid] For a long time the Um receiver with best performance
		\item[gsm-receiver] The latest generation of Um receiver
	\end{description}
	\item Today, gsm-receiver seems to be the most popular choice
\end{itemize}
\end{frame}

\begin{frame}{Open Source GSM Tools: Airprobe}
\begin{itemize}
	\item Some other airprobe tools
	\begin{description}[viterbi\_gen]
		\item[gsmdecode] A standalone text-mode Um L2 frame parser
		\item[wireshark] Dissector code for feeding Um frames into wireshark
		\item[gsmstack] An unfinished more modular implementation of a Rx-only L1
		\item[viterbi\_gen] Generate C++ implementations of a viterbi decoder
	\end{description}
	\item Still under development, no user friendly solution
	\begin{itemize}
		\item gsmtap frame format needs to be added as clean wireshark interface
		\item receivers need automatic frequency scanning
		\item full solution needs proper UI
	\end{itemize}
\end{itemize}
\end{frame}