TODO: OsmocomBB to continually iterate over all cells and dump SI

Steve Markgraf steve at steve-m.de
Wed Dec 22 17:23:35 UTC 2010


Hi all,

On 22.12.2010 17:58, Harald Welte wrote:

> A number of people want to do some long-term evaluation of their cellular
> environment and would be interested in an 'app' for OsmocomBB that continuously
> scans the spectrum and dumps the cell parameters such as
>   * ARFCN, Signal Level, SNR
>   * frequency synch offset
>   * SCH info (BCC/NCC)
>   * SI (at least 1-4) from BCCH
> 	* optional logging of GPS coordinates from a GPS receiver

Just to avoid any duplicate of work as well: most of this is already 
done by cell_log (layer23/src/misc). It iterates over the whole spectrum 
and tries to get an Immediate Assignment by sending a RACH to every cell.
It stores SI1-4, GPS position and the TA in a logfile, and using the 
gsmmap utility you can create a *.kml map of the calculated cell 
positions for Google Earth.

So what's missing is really only the PCAP support and a command line 
switch to turn off the "active" scanning by sending no RACHs.

Regards,
Steve




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