Hello,
I am using a SDR device (a BladeRF) and there is a nice tool called 'kal' that will show me all of my nearby GSM base stations.
In addition to listing base stations and their frequencies, I could also use that frequency info to monitor the beacon channel with gr-scan/airprobe.
So at this point I know:
- base station exists
- I know its frequency
- based on beacon channel assignments, etc., I *sort of* know how busy it is.
But what else can be learned about a particular base station with simply passive observation and no decryption (and no sim card) ? If all I have is a passive monitor with a SDR, what else can I learn frmo the beacon channel or from the station itself ?
Is it possible to learn things like software version, protocols supported, connectivity to network, or to other base stations ?
My goal is to learn about the GSM networks around me and I wonder how deeply I can understand them with just passive observation of the beacon channel (or other sources of info that can be seen with SDR).
Thank you.
Hi all!
This is an announcement for an "irregular" Berlin Osmocom User Group
event.
David Rupprecht of Ruhr-Uni Bochum has offered to give us a presentation
sharing his experience in Running OpenAirInterface.
OpenAirInterface (http://openairinterface.eurecom.fr/) is a project of
the Eurecom research institute in Sofia Antipoils / France. For many
years they have been working towards an open source SDR LTE
implementation.
The presentation will be held on
Oct 15, 8pm @ IN-Berlin, Lehrter Str. 53, 10557 Berlin
(yes, this is _NOT_ CCC Berlin where regular OSMUG meetings are held!)
The meeting is open to anyone interested in mobile communications. You
do not have to be involved with the Osmocom projects in order to attend.
Anyone interested in mobile communications protocols is welcome.
If you are interested to show up, feel free to do so. The meeting is
"free as in free beer", despite no actual free beer being around ;)
More information about the venue can be found at
http://www.in-berlin.de/space/
The official event announcement website is
http://openbsc.osmocom.org/trac/blog/david-rub-openair-20151015
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org>
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
Hello,
I'm currently trying to use a Pirelli DP-L10 calypso phone as a
rudimentary BTS.
I have followed the instructions on
http://openbsc.osmocom.org/trac/wiki/network_from_scratch,
I'm using the jolly/testing branch of osmocom-bb and I've enabled TX
support in the Makefile.
The software runs on an xubuntu 14.04 x64 machine.
After uploading the firmware to the phones RAM via osmocon, it shows
that it's running osmocom-bb on the display, when I then try to run
transceiver with the following parameters: -e 5 -r 99 (or alternativly
-e 5 -a 958 to sync with german provider O2)
the phone just reboots and goes into a state where the keyboard
backlight is blinking with 0.5 hertz.
The last thing "transceiver" says is:
<0012> l1ctl.c:383 Reset received: Starting sync.
<000c> l1ctl.c:95 Sync Req
<000c> l1ctl_link.c:171 Sending: '01 00 00 00 83 be 00 64 27 10 03 20
03 07 00 00 00 '
and the last log messages from osmocon are:
DSP API Version: 0x3606 0x0000
LOST 7200!
L1CTL_RESET_REQ: FULL!L1CTL_FBSB_REQ (arfcn=33726, flags=0x7)
Dropping sample ':'
I'm not sure if I have configured the correct bands for
synchronization. I think it might have to do something with that.
I copy'd the default configuration from the osmocom-page stating DCS1800.
The only base station I'm seeing here is 958, which is in the GSM900R
range. Could this be the problem?
Have I overseen something simple? Have I provided all necessary
information about my setup? Any ideas?
It's probably not a power issue, I have tested it with a lab power
supply for providing the USB 5V and battery 4.2V, which resulted in
the same behavior.
Thanks,
Tobias
--
This email is encrypted with 2ROT-13.
Tobias Mädel
t.maedel(a)alfeld.de
PGP: 3A69 E9AF 3FA9 3BCF FE50 9694 494E 2F56 C304 60E1
http://tbspace.de
Hi all!
This is the announcement for the re-incarnated Osmocom Berlin meeting:
Oct 7, 8pm @ CCC Berlin, Marienstr. 11, 10117 Berlin
Harald will be presenting about the Iuh protocol stack of UMTS small
cells / femtocells and his work towards implementing it as part of
Osmocom.
Agenda:
20:00h Welcome
20:15h Presentation about Iuh / osmo-iuh
21:00h Informal meeting / chatting
The meeting is open to anyone interested in mobile communications. You
do not have to be involved with the Osmocom projects in order to attend.
Anyone interested in mobile communications protocols is welcome.
If you are interested to show up, feel free to do so. There is no
registration required. The meeting is free as in "free beer", despite
no actual free beer being around.
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org>
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
Harald Welte <laforge(a)gnumonks.org> wrote:
> This is the announcement for the re-incarnated Osmocom Berlin meeting:
>
> Oct 7, 8pm @ CCC Berlin, Marienstr. 11, 10117 Berlin
And for those who happen to be on the other side of the world (Southern
California instead of Germany, San Diego instead of Berlin), there is
this other meeting/presentation on a related topic happening about a
day and a half later in Universal Time:
http://www.meetup.com/kernel-panic/events/225595627/
> If you are interested to show up, feel free to do so. There is no
> registration required. The meeting is free as in "free beer",
Same for ours.
> despite no actual free beer being around.
While we don't serve beer either (for one thing, the venue who
graciously provide us with free meeting space would have a problem
with alcohol on the premises), we do usually have free refreshments as
in soft drinks and cookies.
M~
