baseband-devel October 2015

baseband-devel@lists.osmocom.org

6 participants
15 discussions

What can I learn about a GSM base station without doing any decryption ?
by Mm Bsd 13 Oct '15

13 Oct '15

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.

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Oct 15, 8pm / OSMUG: "Running OpenAirInterface"
by Harald Welte 09 Oct '15

09 Oct '15

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)

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OsmoTRX on Pirelli DP-L10 restarts phone
by Tobias Mädel 05 Oct '15

05 Oct '15

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

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Oct 07, 8pm / Osmocom Berlin User Group meeting
by Harald Welte 04 Oct '15

04 Oct '15

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)

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Re: Oct 07, 8pm / Osmocom Berlin User Group meeting
by Mychaela Falconia 03 Oct '15

03 Oct '15

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~

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baseband-devel October 2015