baseband-devel

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2022 discussions

CalypsoBTS no sync, ms hang
by Anton Gorbachev 05 May '17

05 May '17

Dear colleagues, I am trying to setup CalypsoBTS with two c113 phones. Don't you know why can't I sync to any commercial cell with transceiver from branch jolly/testing? What I have: Motorola c113 and c113a, tried both. All other apps like, RSSI, mobile, ccch_scan works like a charm. What I am doing: Built jolly/testing according to maual https://osmocom.org/projects/baseband/wiki/CalypsoBTS Load firmware ./osmocon -r 99 -m c123xor -p /dev/ttyUSB0 -c ../../target/firmware/board/compal_e88/trx.highram.bin Found several strongest cells with RSSI and cell_log. Trying to sync: ./transceiver -a 50 -r 99 -e 1 Here is the log: 50 41 1 <000c> l1ctl.c:77 Tx Reset Req (1) <000c> l1ctl_link.c:171 Sending: '0d 00 00 00 01 00 00 00 ' <0012> l1ctl.c:383 Reset received: Starting sync. <000c> l1ctl.c:95 Sync Req <000c> l1ctl_link.c:171 Sending: '01 00 00 00 00 32 00 64 27 10 03 20 03 07 00 00 00 ' After that phone hangs, no reaction in osmocon on key pressures, holding on power off button... The last messages are: L1CTL_RESET_REQ: FULL!L1CTL_FBSB_REQ (arfcn=50, flags=0x7) Starting FCCH RecognitionFB0 (2515:4): TOA= 3552, Power= -64dBm, Angle= 1328Hz FB1 (2525:8): TOA= 8543, Power= -64dBm, Angle= 114Hz fn_offset=2523 (fn=2525 + attempt=8 + ntdma = 6) delay=8 (fn_offset=2523 + 11 - fn=2525 - 1 scheduling next FB/SB detection task with delay 8 =>FB @ FNR 2523 fn_offset=2523 qbits=3988 Synchronize_TDMA LOST 3398! I tried different cells, maybe I need to wait some time to warm the crystal? But can it be so important? Kind regards, Anton

1 1

Re: OsmocomBB full Opensouce?
by Vadim Yanitskiy 04 May '17

04 May '17

Hi Anton, > There are some ideas floating around of doing a new run of this using > OsmoTRX as basis, but I don't know if there is any actual progress yet. > Vadim should be able to say more about it. Yeah, I started to work on SDR based PHY about a year ago, but so far I was busy with libosmocore development. Right now almost everything (including libosmocoding of course) is in master branch, so it's good point to resume this work. If you would like to contribute this direction or something else, we are always open for that, so feel free! The source code is currently on GitHub: https://github.com/axilirator/osmocom-bb/ BTW: Harald, is it possible to create a new branch for that work in the project's repo? If yes, I can send you my public key in PM. Thanks! With best regards, Vadim Yanitskiy.

4 3

Phone not receiving calls
by samir 04 May '17

04 May '17

Hello, I test osmocombb for some time with motorola c115. I can make calls but not always receive calls. I tried 2 sim cards one of them is working fine but the other doesn’t receive anything. I really need some help to solve my problem. thanks in advance.

1 0

CalypsoBTS + GPRS and SDR suggestion
by Maurizio Agazzini 04 May '17

04 May '17

Hi everybody, I'm pretty new to the GSM/UMTS environment and I'm doing some tests. Currently I need to analyze some IoT devices that use 2G network to comunicate via GPRS. I setup CalypsoBTS to work with 2 old motorola c123, I know that isn't the best way to do that, but I would like to have a cheap solution. I got the setup working with a normal phone and the BTS seems to work correctly (using jolly/testing), but from my understanding it support only GSM calls and SMS and GPRS is not implemented into the transceiver. I'm wrong or this part has not been implemented yet? If needed to use a GPRS BTS can you suggest the best cheap SDR to use with OsmoBTS? (I saw BladeRF and LimeSDR but I was unable to understand if they are full supported via OsmoBTS) Thank you in advance. inode

1 0

OsmocomBB full Opensouce?
by Anton Gorbachev 04 May '17

04 May '17

Dear collegues, Could you please help me to understand one thing.. If I understood everything correct, osmocombb project consist of all the code for GSM stack L1-L3 functionality but Calypdo DSP code is not Opensource and layer1.bin ask non-opensource DSP module to do execute L1 tasks from ghis list: https://osmocom.org/projects/baseband/wiki/TSM30Layer1#DSP-Tasks Of cource we can patch DSP and ask it to do whatever we want, like send raw bursts to the host, but now osmocombb uses mostly DSP firmware written by Texas Instruments, not its own opdnsource. Is it correct or not? Thanks in advance!

2 1

osmocombb for qcom
by thayyil09 yil 01 May '17

01 May '17

is it possible to add new project page to osmocom site. as i mentioned earlear sourcecode already available for qcom i think none intrested in it. is it true .why?

1 0

Re: osmocom-bb moved to gerrit
by Vadim Yanitskiy 26 Apr '17

26 Apr '17

Hi, > The osmocom-bb git repository has now moved to gerrit. Great news! > There are no tests in osmocom-bb yet, but I wonder if it would be possible to add > simple jenkins job which checks that arm cross-compilation for osmocom-bb > succeeds as a patch check? I can take this task and try to write a Jenkins script. Also, we need to have cross-compiler installed on the build machines. With best regards, Vadim Yanitskiy.

4 6

osmocom-bb moved to gerrit
by Neels Hofmeyr 25 Apr '17

25 Apr '17

The osmocom-bb git repository has now moved to gerrit. For patch submission to osmocom-bb, see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit ~N

2 1

osmocombb on qualcom android phones
by thayyil09 yil 22 Apr '17

22 Apr '17

2 1

Re: gerrit for osmocom-bb
by Vadim Yanitskiy 20 Apr '17

20 Apr '17

Hi, > I'm not sure if it's just me or if I'm using it wrong but > I'm always annoyed when I have to login to gerrit ... +1 here, Gerrit login is (for now) a bit unfriendly. Even so, there are also some advantages to have OsmocomBB in Gerrit: - Jenkins builder: maintainers / reviewers don't need to manually check whether a new commit fails build or not. - I don't need to copy-paste the source code to leave a contextual comment or ask a question. - Doing 'git push gerrit ...' is simpler and faster for me, than 'git format-patch ...', 'git send-email ...'. So, I would be definitely happy to see OsmocomBB in Gerrit. With best regards, Vadim Yanitskiy.

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