OpenBSC July 2019

openbsc@lists.osmocom.org

17 participants
30 discussions

dynamic traffic channels
by Neels Hofmeyr 20 May '25

20 May '25

On Tue, Jun 28, 2016 at 10:05:28AM +0200, Harald Welte wrote: > [translated from german] > is it certain that we switch a channel to PDCH only when > gprs mode != none? A TS can be GSM_PCHAN_TCH_F_PDCH; those are the only ones for which we send a PDCH ACT message. We send a PDCH ACT message - during init (CHANNEL OML's state changed to enabled -> send PDCH ACT), - and upon channel release ack when pchan == GSM_PCHAN_TCH_F_PDCH. So the question is, when we receive a channel release ack, could that be the PDCH release and we switch PDCH right back on by accident? No, because we only receive a chan rel ack when the *TCH/F* is being released. That is because the PDCH release is initiated "internally" from the PDCH DEACT, and thus this condition in common/rsl.c rsl_tx_rf_rel_ack() catches on, which existed before dyn PDCH: if (lchan->rel_act_kind != LCHAN_REL_ACT_RSL) { LOGP(DRSL, LOGL_NOTICE, "%s not sending REL ACK\n", gsm_lchan_name(lchan)); return 0; } In rsl_rx_rf_chan_rel() the rel_act_kind is set to LCHAN_REL_ACT_RSL, but not in the rsl_rx_dyn_pdch(). This is analogous to the ip.access way -- the ip.access nanobts replies to a PDCH DEACT with a PDCH DEACT ACK and doesn't send a separate channel release ack. Maybe we could set rel_act_kind to some new LCHAN_REL_ACT_IPAC_DYN_PDCH for clarity? (But we shouldn't actually send a release ack, to stay compatible.) Even though it works as-is, we should indeed add another flag check: - We do check the flags that no ACT/DEACT is already pending; - And we do send a PDCH DEACT only if ts->flags & TS_F_PDCH_ACTIVE; - But we would send a PDCH ACT despite ts->flags & TS_F_PDCH_ACTIVE. This should never happen, but it would make sense to ensure that. ~Neels

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Problem while running NIB on Open Cellular Base sation
by Brackley Casinga 31 Jan '24

31 Jan '24

Hi, My name is Brackley Cassinga Form DRC, we run a community network called pamoja net where we offer gsm services using osmocom open source software and OC Base station. Recently I have tried to install another base station as the same installed but I could not find any resource guiding through all the steps to take to run NIB on a base station. I'm currently running Ubuntu and I will appreciate if you could guide me on the installation of BSC,hlr,MSC , in order to run a basic gsm network. Thank you. Regards -- *Ir Brackley heshima Casinga **Pacifique* *CEO and Founder of kwanzatechnologie* KwanzaTechnologies ,GlobalElectronics +243977265291 | +243977265291 | Pcassinga(a)gmail.com/ brackley(a)ensemblepourladifference.org www.kwantechnologies.jimdosite.com <http://www.kwantechnologies.com/> | Skype: Brackley cassinga <https://webapp.wisestamp.com/#> Av Semliki N 43

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Sample configs for reproducing osmo-nitb behaviour with the split stack
by Rafael Diniz 23 Aug '19

23 Aug '19

Hi all, Today I'm working on updating my NuRAN unit with the new osmo stack in order to try to reproduce the same behavior of old osmo-nitb we use in production in Rhizomatica (with subscriber_create_on_demand feature on). I'm writing just in case someone already put online a set of config files with the parameters needed by such behavior set? ; ) ps: I have the new splip stack working fine here, I just need to modify my setup with new features to support subscriber_create_on_demand. Best regards, Rafael Diniz

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Osmocom Village at CCC Camp 2019
by Harald Welte 01 Aug '19

01 Aug '19

Dear all, I've been asked by a number of pepole about a possible Osmocom village at the CCC Camp 2019. I personally didn't really have any plans, but given related e-mails and "encouragement" I went ahead and registered an "Osmocom Village", see https://signup.c3assemblies.de/assembly/3b8f7aa2-95d5-4c44-aadc-de8f2680e9c3 I also created a wiki page (as nobody else did, despite earlier discussion on IRC, SCNR) for coordinating related efforts at https://osmocom.org/projects/osmo-dev-con/wiki/CCC_Camp_2019 One of the bigger questions is about having a tent as well as some tables/benches to sit on and work. The Camp orga team nas been negotiating rates with a tent rental company, but to be honest I'm rather surprised by the extremely steep pricing. The smallest possible tent (6m x 3m) would cost 825 EUR. I'm not sure we want to raise that amount of money? Even if we'd be 10 people sharing it, its still 82.50 EUR per person. And that excludes any tables/chairs. I'm attaching the relevant parts of a mail from the assemblies orga team FYI. Please note there also is some kind of fragmentation / overlap with the team planning to run the GSM/3G networks at the camp, see Lynxis' related post at https://lists.osmocom.org/mailman/private/osmocom-event-orga/2019-June/0003… It's questionable whether it makes sense to have tow distinct 'villages', but given that e.g. I don't know anyone of that singularity city, I'm not sure if we'd either be welcome there, nor whether we'd want to associate us with them? Also, while the GSM network operation for sure has good reasons to mingle with the POC and whatever facilities they have, I'm not sure if the wider Osmocom community attendees unrelated to the GSM network operation wouldn't just be a disturbance/nuisance. In the end, to be honest, I personally do not feel I have the time and mental capacity to take on any additional tasks in terms of organizing anything. I just created the entry in c3assemblies as I was asked to, and I similarly created the related mailing list and wiki page. So please, anyone interested in making an Osmocom village happen one way or another, step up [and continue this discussion on the camp2019-village(a)lists.osmocom.org mailing list, without crossposting everywhere else :) Regards, Harald -- - 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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Using trxcon/fake_trx with PDCH for TTCN3 tests
by Oliver Smith 30 Jul '19

30 Jul '19

Hello Vadim, I'm working on the TTCN3 tests for OsmoPCU. Harald told me, that there are a few tests existing tests (such as TC_ul_tbf), that had been developed with osmo-bts-virtual/virt_phy. He also said that since there is trxcon/fake_trx nowadays, it would be better to use that instead, if it supports PDCH. From a quick "git grep", it looks like PDCH is supported in trxcon. What do you think, should it work well enough to do the switch? Thanks, Oliver -- - Oliver Smith <osmith(a)sysmocom.de> https://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte

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OpenBSC on 3rd party MSC
by wyao＠corrections.com 30 Jul '19

30 Jul '19

Hello All, I am working on get OpenBSC connected to a 3rd party MSC, I read from the Osmo document that I can use the bsc only mode and the osm-bsc instead of the osmo-nitb. Currently I had osmo-trx-uhd, osmo-bts-trx, osmo-bsc, and osmo-stp configured and and running, but I see a lot of below error logs in the osmo-stp console: ``````````````````````````` DLSS7 <000c> osmo_ss7.c:1468 asp-asp-dyn-0: xua_srv_conn_cb(): sctp_recvmsg() returned 56 (flags=0x80) DLM3UA <000f> m3ua.c:722 asp-asp-dyn-0: Received M3UA Message (XFER:DATA) DLM3UA <000f> m3ua.c:541 asp-asp-dyn-0: m3ua_rx_xfer DLM3UA <000f> m3ua.c:580 asp-asp-dyn-0: m3ua_rx_xfer(): M3UA data header: opc=337=0.42.1 dpc=185=0.23.1 DLSS7 <000c> osmo_ss7_hmrt.c:278 m3ua_hmdc_rx_from_l2(): dpc=185=0.23.1 not local, message is for routing DLSS7 <000c> osmo_ss7_hmrt.c:258 MTP-TRANSFER.req for DPC 185: no route! ```````````````````````````` On the BSC console, I am seeing a lot of: ``````````````````````````````` <0007> a_reset.c:106 A-RESET(msc-0)[0xb76ce0]{DISC}: (re)sending BSSMAP RESET message... <0007> osmo_bsc_sigtran.c:93 Sending RESET to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP ``````````````````````````````` Can anyone identify what is the issue here? Appreciates! Regards, Weiqi

3 4

massive regressions in osmo-bts
by Harald Welte 26 Jul '19

26 Jul '19

Hi! Four builds ago, from build 585 onwards, we are seeing massive regressions in the BTS_Tests.ttcn test suite on osmo-bts master: https://jenkins.osmocom.org/jenkins/view/TTCN3/job/ttcn3-bts-test/test_resu… I think this matches roughly when the TRXDv1 protocol changes were merged, it would be great if anyone making changes to osmo-bts or the test suite around July 21/22nd could investigate what's happening here. Tests against osmo-bts-latest are doing fine, so I think we can exclude a bug in the test suite. Thanks + Regards, Harald -- - 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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Unsubscribe
by BT Infinite 26 Jul '19

26 Jul '19

I Want to unsubscribe this email. There is an error on website.

1 0

libosmocore for multi-threaded software
by Rafael Diniz 25 Jul '19

25 Jul '19

Hi all, I'm writing some tools for using with HF radio and SDR modems [1], and I'm using multi-threaded architecture. Do you know the status and/or which branch should I use of libosmocore in a multi-threaded application? Regards, Rafael Diniz [1] https://github.com/DigitalHERMES/rhizo-uuardop

2 1

OpenBSC inquiry
by tyler wood 25 Jul '19

25 Jul '19

Good evening, My name is Tyler Wood, I was wondering how much yall would charge to create a dongle with OpenBSC on it and mail it to me. If I have contacted the wrong emails please let me know who I need to contact. Thank you for your time. Very Respectfully, Tyler Wood

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OpenBSC July 2019