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2022 discussions

OpenBSC and OsmocomBB
by Testphone Test 11 Sep '17

11 Sep '17

Dear List I am trying to run osmocomBB with motorola c118 with openbsc.I tried to get openbsc network on my phone it works well and I am able to register on openbsc network. But when i try to run osmocomBB with openBSC i am not able to get network. Also when i run rssi firmware on c118 phone i get network and its working fine. I am using default configuration file for OpenBSC and using NanoBTS with 1800Mhz support. Is there any configuration change is needed in openBSC ? <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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help me osmocomBB
by Олег Суворов 11 Sep '17

11 Sep '17

Can you help me? -------- Пересылаемое сообщение -------- От кого: Олег Суворов <olegtsss(a)mail.ru> Кому: baseband-devel <baseband-devel(a)lists.osmocom.org> Дата: Пятница, 1 сентября 2017, 18:28 +06:00 Тема: help me Hello, I am from Russia, can you help me with Filter Replacement! I have to mobile, Motorolla C115 and C118. I was bye all elements to make filter replacement. Motorolla C115 look like your instruction and I was done filter replacement. Motorolla C115 nice work after it. But Motorolla C118 don`t look like in your instruction. I read: "Different circuit Sometimes the input (at the bottom of the balun) is not with caps in series and a resistor in parallel. Instead it might be without the resistors in parallel and resistors in series. Remove the resistors and place 2x the appropriate cap in series (22 pF for GSM90, 15 pF for DCS1800". But I don`t understand what I must do. I do like my picture (С118_2.jpg), but after it Motorolla don`t work: No signal from Network. Can you help me? With Best Regards, Oleg Syvorov ---------------------------------------------------------------------- ----------------------------------------------------------------------

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Osmocombb on Ubuntu 16.04
by ty 08 Sep '17

08 Sep '17

Hi. My name is tyrus and I have been working with OsmocomBB since 2014 but had given it a break. I decided to go back to the project only that this time I am running a machine on Ubuntu 16.04 LTS. I get the following error during the make stage of the installation: libmobile.a(gsm48_rr.o): In function `gsm48_rr_enc_cm3': */home/tyrus/osmocom-bb/src/host/layer23/src/mobile/gsm48_rr.c:1210: undefined reference to `bitvec_fill'* *libmobile.a(vty_interface.o): In function `cfg_ms_rename':* */home/tyrus/osmocom-bb/src/host/layer23/src/mobile/vty_interface.c:1283: undefined reference to `osmo_talloc_replace_string'* collect2: error: ld returned 1 exit status Makefile:377: recipe for target 'mobile' failed make[3]: *** [mobile] Error 1 make[3]: Leaving directory '/home/tyrus/osmocom-bb/src/host/layer23/src/mobile' Makefile:322: recipe for target 'all-recursive' failed make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory '/home/tyrus/osmocom-bb/src/host/layer23/src' Makefile:348: recipe for target 'all-recursive' failed make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory '/home/tyrus/osmocom-bb/src/host/layer23' Makefile:84: recipe for target 'host/layer23/layer23' failed make: *** [host/layer23/layer23] Error 2 Anyone else experienced this? I have *gcc-arm-none-eabi* toolchain installed Much appreciated. -ty

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Re: SDR_PHY question
by Vadim Yanitskiy 07 Sep '17

07 Sep '17

Hi, > I believe I need to keep focusing on osmo-trx support > as the gr-gsm app does not seem to support TX (please > correct me if I'm wrong though). You are right, currently it doesn't. But we together with Piotr Krysik are working on TX support for GR-GSM... > I will keep investigating this and I will provide you > some patches for osmo-trx which enable power > measurement and synchronization. Great! Having both OsmoTRX and GR-GSM TRX support would be good. I am currently busy with TCH implementation for trxcon, so as soon as I finish, I'll put my development power on this too. With best regards, Vadim Yanitskiy.

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Re: SDR_PHY question
by Vadim Yanitskiy 07 Sep '17

07 Sep '17

Hi Adrian, > I am interested in the sdr_phy work being done currently Great to hear that. > I built osmo-trx from the ms branch and implemented a crude > power measurement command. When running trxcon everything works > fine, I get power indications for channels, and then when the > mobile app is trying to sync to an ARFCN I start having issues. I have never developed / tested trxcon with OsmoTRX so far. Currently I am using GR-GSM as a L1 back-end, and the virtual connection between OsmocomBB and OsmoBTS during development. In general, trxcon should be able to 'speak' with OsmoTRX, because one do use classical transceiver UDP interfaces. But there are some CTRL commands, which aren't implemented in OsmoTRX yet (such as ECHO and MEASURE). > I had to change the code of trxcon in order for SCH to work, > because the bit values were inverted (0 was 1 and viceversa). > I am attaching the changes at the end of the message. Sounds strange. In case of virtual Um-interface (FakeTRX) and GR-GSM TRX all SCH messages are decoded correctly. I will look closer to this issue, thanks anyway! > It appears as if the deinterleaving in gsm0503_xcch_decode > does not work... could be the order of bursts? The order of bursts should be consistent, I mean frame-by-frame. You need to make sure that a frame number from SCH burst is being decoded correctly by OsmoTRX. Every burst coming from OsmoTRX has a header with frame number, which is used by trxcon to determine a current frame position within a multiframe. Probably, the problem is due to incorrect / consistent frame number values. The internal clock counter (sched_clck.c) is only used to schedule the UL bursts transmission. > I'd appreciate any help here. I'm also ready to share the > changes I've made to osmo-trx/ms and trxcon. For now, have a look at: - GR-GSM based transceiver: https://github.com/axilirator/gr-gsm/tree/fixeria/trx - Virtual Um-interface (brief description): http://git.osmocom.org/osmocom-bb/tree/src/target/fake_trx/README?h=fixeria… - The latest version of trxcon (use fixeria/fake_trx branch): http://git.osmocom.org/osmocom-bb/log/?h=fixeria/fake_trx You can also join the development process, feel free to mail me. I will create the wiki page as soon as possible. With best regards, Vadim Yanitskiy.

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SDR_PHY question
by Adrian Musceac 06 Sep '17

06 Sep '17

Hello, I am interested in the sdr_phy work being done currently, and I'm trying to get it set up on my computer. I built osmo-trx from the ms branch and implemented a crude power measurement command. When running trxcon everything works fine, I get power indications for channels, and then when the mobile app is trying to sync to an ARFCN I start having issues. The FCCH bursts are decoded fine, and so are the SCH bursts (which I can also see in the osmo-trx terminal). I had to change the code of trxcon in order for SCH to work, because the bit values were inverted (0 was 1 and viceversa). I am attaching the changes at the end of the message. Unfortunately, the BCCH and CCCH bursts are not decoded: <0006> sched_lchan_sch.c:98 Received SCH: bsic=30, fn=1116799, sched_fn=1116798 <0006> sched_lchan_xcch.c:69 Data received on BCCH: fn=1116800 ts=0 bid=0 <0006> sched_lchan_xcch.c:69 Data received on BCCH: fn=1116801 ts=0 bid=1 <0006> sched_lchan_xcch.c:69 Data received on BCCH: fn=1116802 ts=0 bid=2 <0006> sched_lchan_xcch.c:69 Data received on BCCH: fn=1116803 ts=0 bid=3 <0006> sched_lchan_xcch.c:117 Received bad data frame at fn=1116800 (2/51) for BCCH with 66 errors It appears as if the deinterleaving in gsm0503_xcch_decode does not work... could be the order of bursts? I'd appreciate any help here. I'm also ready to share the changes I've made to osmo-trx/ms and trxcon. Best regards, Adrian diff --git a/src/host/trxcon/trx_if.c b/src/host/trxcon/trx_if.c index 6a84af6..def571c 100644 --- a/src/host/trxcon/trx_if.c +++ b/src/host/trxcon/trx_if.c @@ -325,6 +325,11 @@ int trx_if_cmd_setslot(struct trx_instance *trx, uint8_t tn, uint8_t type) return trx_ctrl_cmd(trx, 1, "SETSLOT", "%d %d", tn, type); } +int trx_if_cmd_sync(struct trx_instance *trx, uint8_t type) +{ + return trx_ctrl_cmd(trx, 1, "SYNC", "%d", type); +} + /* * Tuning Control * @@ -392,7 +397,7 @@ int trx_if_cmd_measure(struct trx_instance *trx, LOGP(DTRX, LOGL_ERROR, "ARFCN %d not defined\n", arfcn_start); return -ENOTSUP; } - + trx_ctrl_cmd(trx, 1, "RXTUNE", "%d", freq10 * 100); return trx_ctrl_cmd(trx, 1, "MEASURE", "%d", freq10 * 100); } @@ -421,6 +426,7 @@ static void trx_if_measure_rsp_cb(struct trx_instance *trx, char *resp) arfcn == trx->pm_arfcn_stop); /* Schedule a next measurement */ + usleep(50000); if (arfcn != trx->pm_arfcn_stop) trx_if_cmd_measure(trx, ++arfcn, trx->pm_arfcn_stop); } @@ -558,9 +564,9 @@ static int trx_data_rx_cb(struct osmo_fd *ofd, unsigned int what) /* Copy and convert bits {254..0} to sbits {-127..127} */ for (i = 0; i < 148; i++) { if (buf[8 + i] == 255) - bits[i] = -127; + bits[i] = 127; else - bits[i] = 127 - buf[8 + i]; + bits[i] = -127 + buf[8 + i]; }

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help me
by Олег Суворов 05 Sep '17

05 Sep '17

Hello, I am from Russia, can you help me with Filter Replacement! I have to mobile, Motorolla C115 and C118. I was bye all elements to make filter replacement. Motorolla C115 look like your instruction and I was done filter replacement. Motorolla C115 nice work after it. But Motorolla C118 don`t look like in your instruction (no network signal or network signal is 1 level from 5). I read: "Different circuit Sometimes the input (at the bottom of the balun) is not with caps in series and a resistor in parallel. Instead it might be without the resistors in parallel and resistors in series. Remove the resistors and place 2x the appropriate cap in series (22 pF for GSM90, 15 pF for DCS1800". But I don`t understand what I must do. I do like my picture (your network email network filter doesn`t allow me to download my photo, but I can send it if you allow this), but after it Motorolla don`t work: No signal from Network (or network signal is 1 level from 5). Can you help me? With Best Regards, Oleg Syvorov

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simple question
by Mohsen Asghari 01 Sep '17

01 Sep '17

Hi My name is Mohsen Asghari, master student in Computer EngineeringI have to create a communication center based on GSM with OpenBTS,everything is OK, I have tested osmocom-bb with SMS in vty and it was perfectbut there is call problem. in both of real and virtual network this problem is bothering me finishing my thesiscan you help me understand whats wrong with my packages and installation? it is five months that I am trying to fix this problem but I cant.in the cm-service command I have a channel release from ms which the comments shows that the problem is about there is no free socket for voice....! _____________ yours sincerely, Mohsen Asghari

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help me
by Олег Суворов 01 Sep '17

01 Sep '17

Hello, I am from Russia, can you help me with Filter Replacement! I have to mobile, Motorolla C115 and C118. I was bye all elements to make filter replacement. Motorolla C115 look like your instruction and I was done filter replacement. Motorolla C115 nice work after it. But Motorolla C118 don`t look like in your instruction. I read: "Different circuit Sometimes the input (at the bottom of the balun) is not with caps in series and a resistor in parallel. Instead it might be without the resistors in parallel and resistors in series. Remove the resistors and place 2x the appropriate cap in series (22 pF for GSM90, 15 pF for DCS1800". But I don`t understand what I must do. I do like my picture (С118_2.jpg), but after it Motorolla don`t work: No signal from Network. Can you help me? With Best Regards, Oleg Syvorov

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redmine e-mails broken from 08/26 through 08/31
by Harald Welte 31 Aug '17

31 Aug '17

Dear Osmocom community, from August 26th 06:54 UTC through August 31st 06:22 UTC our Osmocom.org redmine could not send any e-mails. This was due to a configuration file syntax error introduced by me, my apologies. If you rely on redmine e-mail notifications to the issues you have subscribed to, please double-check as related notifications during that interval were unfortunately lost. Best regards, Harald p.s.: The reason for the config change was to enable e-mail notifications from jenkins.osmocom.org (which it now has, if you want to configure e.g. post-build notification actions). -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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