OpenBSC January 2012

openbsc@lists.osmocom.org

24 participants
19 discussions

GPRS - local and foreign TLLIs
by Luca Melette 03 Feb '26

03 Feb '26

Hello everybody, after setting up a nanoBTS with OpenBSC/SGSN/GGSN, I had some troubles trying to connect my smartphone to the GPRS cell. Investigating the BTS-to-SGSN traffic, I saw that the frames sent by the SGSN were all marked with the same N(U) value (at LLC layer), the value was 0. With some debug, I found that the there was a mismatch in the TLLI storage, used to keep the status of attached terminals. The mentioned code is contained in gprs_llc.c, involving LL Entity functions and gprs_llc_tx_ui(). /* look-up or create the LL Entity for this (TLLI, SAPI) tuple */ lle = lle_by_tlli_sapi(msgb_tlli(msg), sapi); if (!lle) { struct gprs_llc_llme *llme; LOGP(DLLC, LOGL_ERROR, "LLC TX: unknown TLLI 0x%08x, " "creating LLME on the fly\n", msgb_tlli(msg)); llme = llme_alloc(msgb_tlli(msg)); lle = &llme->lle[sapi]; } The TX function uses the previously received TLLI to lookup for the LLE. The lle_by_tlli_sapi() performs the search, but preliminary it applies a foreign2local TLLI conversion to ensure to have a local one. Since no valid entry for the searched TLLI is found, a new one is created. And the problem is here. The new entry has the foreign TLLI. Next time the lookup fails again, and a new entry is created. This way, the counter N(U) is always reset, and the mobile do not recognize the message sequence and no attach is possible. My question is about foreign and local TLLIs. I patched the lookup, avoiding the conversion, so that the LLE is found and everything works fine... but... What is the sense of the conversion? Should the TLLI be always stored as a local one? Can this problem be solved with another foreign2local while allocating new entries? Actually, my problem has been solved with that workaround. But I'm curious to know what is the right way. Hope somebody can answer :) Thanks. Cheers, LM

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Re: Help with sccp library
by mosbah abdelkader 07 Jul '25

07 Jul '25

> I don't understand. This callback will be called with data you need to write > to the network. In case of MTP Level3 you will need to wrap that around the > msgb you got. I means: is the interaction with mtp3 layer implemented (is sending sccp data by mtp3 implemented by the library?)? Also, what about the reception of data from mtp3 layer. is that implemented in the sccp lib. I am asking these questions because I see the code of mtp3 in the lib but no significant call is present in the sccp part of the lib. Thank you for your help.

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SimpleHLR: A web interface for OpenBSC
by Peter Caprioli 03 Jun '13

03 Jun '13

Hello everyone, I've just finnished writing together a small web interface for the OpenBSC HLR. It allows you to modify various parameters in the database and also provides a set of functions to modify the HLR or sending SMSes in your own scripts. The project is still very alpha but it seems to work reasonably good. Feel free to give any feedback! Screenshots and source code is available on my website: https://stormhub.org/simplehlr/ -- *Best regards, Peter Caprioli*

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Several questions
by jason mercury 06 Dec '12

06 Dec '12

I have some questions: 1) When I start bsc_hack bsc_init.c first establishes OML link and initializes the bts then it establishes RSL link and bts starts broadcasting. However, it takes so much time to start the bts. Instead of this I want to do the following: it establishes OML link at the beginning and only once, then when i want to start broadcasting it establishes just the RSL link and bts will start faster since i don't have to wait for OML link. What should be done for this? 2) If i send one or two word messages from telnet interface it is okay. But if i send a longer message the phone could't receive the end of the message correctly(last words may be incomplete). Did any one encounter with this problem? What is wrong with me? 3) Could I send SMS in which extension of the sender is text not integer. For example, i want to send an information SMS that this is a test network. For this purpose i want to send an SMS from 'OpenBSC'. I set the extension of the first subscriber in database as text and tried to send the SMS but SMS wasn't delivered. What should i do? 4) Can i add SMS externally to SMS table of database? Thanks. Jason

4 3

Racal 6113 For Sale
by Caleb Pal 24 Jan '12

24 Jan '12

All, I have a Racal/Aeroflex 6113 for sale. As most of you probably know, this is a GSM test set capable of initializing and running certain BTS over an ABIS link. It has a few handy features such as a power meter, etc. The unit is out of cal. I have used it to run measurements on an Ericsson RBS 2401, which is also available. Comes with power cord and a memory card for storing test sequences and test results. The unit is well loaded with options, as seen below. To my knowledge all functions of this unit work. Asking price is $1500 USD + shipping. I am willing to ship overseas, BUT, it is the buyers responsibility to complete all import/export paperwork needed. Be advised it is a rather heavy unit, so shipping OCONUS will be more expensive. Any questions please feel free to contact me off list at cleb(a)defcon-3.net. Options: Software Options: 003 PCS1900 008 GSM850 220 Ericsson 235 Siemens 250 Nortel 270 Nokia 285 interWAVE 300 AIME 310 BOSS BTS Rx Measurements 315 AMR for AIME 316 AIME AMR DTX output 319 AMR AIME error forcing Hardware Options: 04F Frequency Standard A-bis Half Rate/32K Signalling 051 A-bis T1 Interface 054 BOSS RF Module 016 Extended BBP Board 008 GSM850/PCS1900 RXTX Module 010 Encryption A5/1, A5/2 Regards, Caleb

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openbsc no sound
by admin＠manateeshome.com 23 Jan '12

23 Jan '12

hello, I updated my openbsc to newest git version. and since then I do not get any sounds. The setup was working just fine before. So I presume that the problem is within openbsc <000b> osmo_msc.c:72 Assignment complete should not have been reached. <000b> bsc_api.c:331 Sending ChanModify for speech 0 1 <000b> bsc_api.c:118 Using non speech mode: 0 I think this causes the problem. But I have not changed any configuration files or anything. Can somebody tell me how to fix it? I am using a 1900mhz edge nanobts

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wireshark GSMTAP
by David A. Burgess 20 Jan '12

20 Jan '12

Hello - I have been using Wireshark 1.7 from wireshark.org for GSMTAP analysis. I have seen some discrepancies that might be bugs. So I have two questions. First, is there a better-suited WS with more up-to-date GSMTAP support that I should be using (and hopefully pre-built for Mac OS X)? Second, where should I report these suspected bugs? -- David

2 1

Error building libosmo-abis, ortp missing]
by Peter 20 Jan '12

20 Jan '12

Hello, I'm new around here and started from scratch with a new Ubuntu server. I followed the openBSC build guide on the WIKI page http://openbsc.osmocom.org/trac/wiki/Building_OpenBSC. Building libosmocore went smoothly Building libosmo-abis ended in an error: ===== checking for ORTP... no configure: error: Package requirements (ortp >= 0.13.1) were not met: No package 'ortp' found ===== Where can I find the ortp package? And secondly, is this the right version? I saw version 0.15.0 mentioned in the mail archives aready. Thanks in advance, Peter.

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nanoBTS failure
by Jason Mercury 20 Jan '12

20 Jan '12

Hi, I am using OpenBSC with nanoBTS 165CU and 165AU models. In normal location update BTS sends CHAN ACT NACK several times for the same ts and ss. After that it sends some failure messages and restart the trx. Here i copy the related logs from openbsc console: Thu Jan 19 15:44:03 2012 <0000> chan_alloc.c:421 (bts=0,trx=0,ts=6,ss=0) starting release sequence Thu Jan 19 15:44:03 2012 <0003> gsm_04_08_utils.c:231 Sending Channel Release: Chan: Number: 0 Type: 2 Thu Jan 19 15:44:03 2012 <0004> abis_rsl.c:579 (bts=0,trx=0,ts=6,ss=0) DEACTivate SACCH CMD Thu Jan 19 15:44:03 2012 <0004> abis_rsl.c:968 (bts=0,trx=0,ts=6,ss=0): MEAS RES for inactive channel Thu Jan 19 15:44:04 2012 <0004> abis_rsl.c:968 (bts=0,trx=0,ts=6,ss=0): MEAS RES for inactive channel Thu Jan 19 15:44:05 2012 <0004> abis_rsl.c:891 (bts=0,trx=0,ts=6,ss=0) CONNECTION FAIL: RELEASING CAUSE=0x01(Radio Link Failure) Thu Jan 19 15:44:05 2012 <0004> abis_rsl.c:621 (bts=0,trx=0,ts=6,ss=0) RF Channel Release CMD due error 1 Thu Jan 19 15:44:05 2012 <0004> abis_rsl.c:968 (bts=0,trx=0,ts=6,ss=0): MEAS RES for inactive channel Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:594 (bts=0,trx=0,ts=6,ss=0) is back in operation. Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:968 (bts=0,trx=0,ts=6,ss=0): MEAS RES for inactive channel Thu Jan 19 15:44:08 2012 <0000> abis_rsl.c:1490 (bts=0,trx=0,ts=6,ss=0) SAPI=0 Thu Jan 19 15:44:08 2012 <0000> abis_rsl.c:1436 (bts=0,trx=0,ts=6,ss=0) ERROR INDICATION cause=Timer T200 expired (N200+1) times Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:621 (bts=0,trx=0,ts=6,ss=0) RF Channel Release CMD due error 1 Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:968 (bts=0,trx=0,ts=6,ss=0): MEAS RES for inactive channel Thu Jan 19 15:44:08 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure Probable cause= 03 00 01 Additional Text=l3_if_dl.c:276Unrecognised signal(1302) Thu Jan 19 15:44:08 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure Probable cause= 03 00 01 Additional Text=l3_if_dl.c:276Unrecognised signal(1302) Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:968 (bts=0,trx=0,ts=6,ss=0): MEAS RES for inactive channel Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:658 (bts=0,trx=0,ts=6,ss=0) RF CHANNEL RELEASE ACK Thu Jan 19 15:44:08 2012 <0000> chan_alloc.c:303 Freeing lchan with state RELEASE DUE ERROR - setting to NONE Thu Jan 19 15:44:08 2012 <0000> abis_rsl.c:1490 (bts=0,trx=0,ts=6,ss=0) SAPI=0 RELEASE INDICATION Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:1322 (bts=0,trx=0,ts=6,ss=0) Activating ARFCN(885) SS(0) lctype TCH/F r=LOCATION_UPDATE ra=0x0f Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:658 (bts=0,trx=0,ts=6,ss=0) RF CHANNEL RELEASE ACK Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:665 (bts=0,trx=0,ts=6,ss=0) CHAN REL ACK but state ACTIVATION REQUESTED Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:1322 (bts=0,trx=0,ts=6,ss=0) Activating ARFCN(523) SS(0) lctype TCH/F r=LOCATION_UPDATE ra=0x0a Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:1060 (bts=0,trx=0,ts=6,ss=0) CHANNEL ACTIVATE ACK Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:856 (bts=0,trx=0,ts=6,ss=0) CHANNEL ACTIVATE NACK CAUSE=0x50(Radio channel already activated) Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:621 (bts=0,trx=0,ts=6,ss=0) RF Channel Release CMD due error 1 Thu Jan 19 15:44:08 2012 <0000> chan_alloc.c:303 Freeing lchan with state RELEASE DUE ERROR - setting to NONE Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:856 (bts=0,trx=0,ts=6,ss=0) CHANNEL ACTIVATE NACK CAUSE=0x50(Radio channel already activated) Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:621 (bts=0,trx=0,ts=6,ss=0) RF Channel Release CMD due error 1 Thu Jan 19 15:44:08 2012 <0000> chan_alloc.c:303 Freeing lchan with state RELEASE DUE ERROR - setting to NONE Thu Jan 19 15:44:08 2012 <0004> abis_rsl.c:1322 (bts=0,trx=0,ts=6,ss=0) Activating ARFCN(523) SS(0) lctype TCH/F r=LOCATION_UPDATE ra=0x0f Thu Jan 19 15:44:08 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure Probable cause= 03 00 01 Additional Text=l3_if_dl.c:276Unrecognised signal(1302) Thu Jan 19 15:44:08 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure Probable cause= 03 00 01 Additional Text=l3_if_dl.c:276Unrecognised signal(1302) Thu Jan 19 15:44:08 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=critical failure Probable cause= 03 00 00 Additional Text=l3_dcm.c:1190 **** ** l3_dcm.c#1190:Cn0x0e: Aborting RF Chan Rel on second attempt ** IPA_SW_FATAL_ERROR ** In task "TRX Proc:L3" @ (37329). **** Thu Jan 19 15:44:09 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=critical failure Probable cause= 03 00 00 Additional Text=TRX Proc:L3:l3_dcm.c#1190 (37329) Thu Jan 19 15:44:09 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure Probable cause= 03 00 01 Additional Text=16395:WARN:OAM_RES:trx_fatal_error_log.c#260:Cn0x0e: Aborting RF Chan Rel on second attempt Thu Jan 19 15:44:09 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=critical failure Probable cause= 03 00 00 Additional Text= [000ad1e8] |000ad230|800d2fe7|800a4144|000ad250| Thu Jan 19 15:44:09 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=critical failure Probable cause= 03 00 00 Additional Text= [000ad278] |00000000|000b91cc|000ad3c4|000ad3c4| Thu Jan 19 15:44:09 2012 <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) Failure Event Report Type=processing failure Severity=warning level failure Probable cause= 03 00 01 Additional Text=16396:WARN:OAM_RES:res_trx_status.c#231:TRX is not responding - reinitialising the unit... I could not realize the reason of the problem but i think there is something wrong about the sequence of channel activation, release, ack and nack messages between openbsc and bts. Could somebody help about the solution of this or at give some idea to realize the problem? Thanks Jason

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nanoBTS failure
by Jason Mercury 20 Jan '12

20 Jan '12

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OpenBSC January 2012