OpenBSC

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4 participants
4156 discussions

Oct 3, 8pm / Osmocom Berlin User Group meeting?

by Nico Golde

Hi all! I *think* Harald is pretty busy and also unlikely to attend prospective meeting tomorrow. Also there is bank holiday tomorrow in Germany and at least I personally will use that to stay away from technology for a bit, so I won't come. Nevertheless, I thought I'd write this email to remind people that in theory there is a meeting tomorrow and discuss if other people attend. I personally would propose to shift the meeting to next week (for purely selfish reasons ;). As far as I know, there is no formal presentation tomorrow. Anyway, will anyone attend tomorrow or is everyone in favor of shifting a week? In case it takes place, for the people who did not attend so far, the usual snippet from Harald's mails: Oct 3, 8pm @ CCC Berlin, Marienstr. 11, 10113 Berlin 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. Cheers Nico

12 years, 9 months

Erlang command line interface (OTP-version) available

by M. Josenhans

Hello, the Erlang command line interface (OTP version) is available on Github: https://github.com/josemic/Erlang-command-line-interface_otp This is a telnet commandline server written in Erlang using OTP libraries. It provides features such as command-completion, command-abbreviation, command-help, reading/writing commands from/to file and modular command-registration. Its behaviour is kept similar to the well known, C-written, OpenBSC telnet command line server. It is intended for future inclusion into Osmocom's Erlang projects. The installation instructions are found in the github wiki. Cheers, Michael

12 years, 9 months

[PATCH] bsc_init: Forget which SIs are valid for the trx.

by Holger Hans Peter Freyther

The recent commit to improve the SI generation lead to setting the BCCH SIs for all TRX in a multi-trx setup. This is because we create the SIs globally but si_valid appears to be limited to the 'current' trx. Warn if we attempt to set SIs for the BCCH on a trx that does not have a BCCH. --- openbsc/src/libbsc/bsc_init.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/openbsc/src/libbsc/bsc_init.c b/openbsc/src/libbsc/bsc_init.c index e05aec7..7a60e04 100644 --- a/openbsc/src/libbsc/bsc_init.c +++ b/openbsc/src/libbsc/bsc_init.c @@ -129,6 +129,11 @@ static int rsl_si(struct gsm_bts_trx *trx, enum osmo_sysinfo_type i, int si_len) GSM_BTS_SI(bts, i), si_len); break; default: + if (bts->c0 != trx) + LOGP(DRR, LOGL_ERROR, + "Attempting to set BCCH SI%s on wrong BTS/TRX (%d/%d)\n", + get_value_string(osmo_sitype_strs, i), + bts->nr, trx->nr); rc = rsl_bcch_info(trx, osmo_sitype2rsl(i), GSM_BTS_SI(bts, i), si_len); break; @@ -149,6 +154,9 @@ static int set_system_infos(struct gsm_bts_trx *trx) ms_pwr_ctl_lvl(bts->band, bts->ms_max_power); bts->si_common.cell_sel_par.neci = bts->network->neci; + /* Zero, forget the state of the SIs */ + bts->si_valid = 0; + /* First, we determine which of the SI messages we actually need */ if (trx == bts->c0) { -- 1.7.10.4

12 years, 9 months

Analysing the communication between the BSC and the MSC in a sysmoBTS

by Yann R. Moupinda

Hello everybody First of all, let me introduce myself. My name is Yann Moupinda and I'm a student doing his Master thesis in the field of GSM technology. For my thesis, the company for which i'm working now, bought a sysmoBTS from sysmocom. The sysmoBTS is configured as a stand alone GSM network in a box (NITB) running the osmo-nitb and the osmo-bts programs. An important part of my thesis is to understand how the sysmoBTS works and therefore I did some measurements with wireshark to analyse the data flow between the BTS,BSC and MSC/HLR/VLR/EIR. This is also to see the main differences between a sysmoBTS and a conventional GSM Network. I used the " tcpdump " - command on the loopback interface lo0 to capture the data flow between the GSM components and then, the analysis with wireshark shows me only the data flow between BTS and BSC. It's possible to see such messages like LOCATION UPDATING REQUEST and IDENTITY REQUEST wich are normally, transparently exchanged between Mobile Station (MS) and the Network subsystem (MSC/HLR/VLR/EIR). All these messages are always addressed to, or from the same BSC TCP-port 3003. So i can not see what happens behind this port (behind BSC). In order to get the communication between BSC and MSC, i decided to have a deeper look on the logging messages of the sysmoBTS. Even there, i cannot recognize how the data transmission between BSC and MSC works. Does anyone know how to get this information? Any guidance would be appreciated. I have included one .pcap file and a text file of the logging messages taken while i powered on the mobile phone. Best regards, Yann.

12 years, 9 months

OpenBSC and 3G

by John Otten

Hello Everyone, I now have OpenBSC (including GPRS) up and running with a fair amount of stability, using an IP.Access 2G BTS. Now I am looking towards the next stage - getting a 3G system operating. I have the use of an IP.Access NodeB that I would like get running with OpenBSC. In performing my due diligence, I found Harald's 3G road map from December 2010 or so. I am wondering what the current state of development is. I see that IP.Access' URSL protocol was an issue back then, because it is proprietary. Has anyone managed to get far enough in their development that they have implemented the protocol? I also see from Dieter Spaar's blog that he is making some progress, but he states his code is not ready for public release. Since I don't see much about 3G on the OpenBSC wiki, I am assuming that no one has any code that they would want to share at this point. I imagine I may have to forge ahead on my own. I am fairly new to GSM development, and I haven't really delved into the OpenBSC source yet (other than to discern what might have caused some problems I encountered), so if anyone has any suggestions on where to begin, or has some issues where I might be able to assist in order to move development further down the road, please let me know. Thanks! John

12 years, 9 months

Bounce action notification

by mailman＠lists.osmocom.org

This is a Mailman mailing list bounce action notice: List: OpenBSC Member: jledet07(a)student.aau.dk Action: Subscription disabled. Reason: Excessive or fatal bounces. The triggering bounce notice is attached below. Questions? Contact the Mailman site administrator at mailman(a)lists.osmocom.org.

12 years, 9 months

BS-11 to sell

by Harald Welte

Hi! In case anyone on this list is interested in owning a BS-11, I have decided to sell off one more of the units that I still had here for my personal use. I'm also able to sell a compatible HFC-E1 or DAHDI/Digium card along with it. Price is up to negotiation. I don't intend to give it away for free, unless it is somebody with a known track record of osmocom.org contributions. 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)

12 years, 9 months

Help needed with CSD/V.110 decoding

by Tobias Engel

Hi, I have been trying to implement some basic CSD functionality into openbsc. V.110 transparent mode, to be specific, since this should be the most simple to implement. At first I tried with a nanobts, but that didn't seem to work at all. Now I am using a bs-11. The two phones I use establish a connection, but they cannot exchange data and what I see on the Abis link also doesn't really make sense to me. (Needless to say everything works as expected when using the same phones on a production network.) I attached a pcap of a CSD call I made via the bs-11. The second attachment is the raw dump of the traffic frames I received from the BS-11 for _one_ of the phones. (It looks pretty much the same for the other phone.) The first idle data frames received look ok: 00000000 00 00 c5 ff ff ff ff ff fd ff ff ff ff ff ff ff 00000010 ff fd ff ff ff ff ff ff ff ff fd ff ff ff ff ff 00000020 ff ff ff fd ff ff ff ff C bits (Uplink data), D bits (all set to "1" == idle) and E bits (9.6 kbit/s) are all set as expected. But after the synchronisation phase, things start to get strange. The idle frames suddenly look like this: 00000460 00 00 8a ff ff fe fe fe fa fe fe fe fe fe fe fe 00000470 fe fa ff fe fe fe fe fe fe fe fa ff fe fe fe fe 00000480 fe fe fe fa ff fe fe fe The BTS "forgets" to set the first bit of every octet to "1" on most (but not all) octets. Also, the C bits now state that this is a 14.5kbit/s data frame. The E bits say the user rate now is 7.2 kbit/s. There are only four frames with actual payload data in the dump. These frames are at the positions I expect them to be (40600, 60520, 80440, 100400 - they were sent in intervals of 10 seconds). They look like this: 00009e90 00 00 8a ff 2b a2 fa aa 00009ea0 fa 86 02 22 22 6e fe 1a 26 fa d7 4e d6 52 36 56 00009eb0 4e d6 fa 53 36 56 4e d6 52 36 56 fa 4f d6 52 36 What has been sent by the phone is an eight byte timestamp followed by 22 bytes of 0xaa. But I only get one data frame for each of these transmissions (30 bytes of payload don't fit into one data frame), and if I parse it as V.110 data, I get these 20 bytes: 00000000 15 7d 0d 10 d5 ff 33 fb ae f5 ff ae ba ef fd ba 00000010 ef ae ba ff So no 0xaa bytes there... Does anybody have any idea what I might be doing wrong here? Thanks, -Tobias

12 years, 9 months

OpenBSC unsubscribe notification

by mailman-bounces＠lists.osmocom.org

akwonghk(a)gmail.com has been removed from OpenBSC.

12 years, 9 months

Re: OpenBSC Digest, Vol 45, Issue 15

by TAUFIQ WAHYUDI

@peter i have already installed libosmocore,libosmo-aabis,and openBsc,and have been clone and integrated all the items into eclipse via egit. i am a newbie in telco, does anyone in this forum know how to start up openBSC ? i do want to know how does the Box work, and really confuse how to start from.Would you guys send me a technical startup document globally, so then i have an understanding regarding this stuff Best Regards On 9/24/12, openbsc-request(a)lists.osmocom.org <openbsc-request(a)lists.osmocom.org> wrote: > Send OpenBSC mailing list submissions to > openbsc(a)lists.osmocom.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osmocom.org/mailman/listinfo/openbsc > or, via email, send a message with subject or body 'help' to > openbsc-request(a)lists.osmocom.org > > You can reach the person managing the list at > openbsc-owner(a)lists.osmocom.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of OpenBSC digest..." > > > Today's Topics: > > 1. new comer (TAUFIQ WAHYUDI) > 2. Re: new comer (Peter Stuge) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sun, 23 Sep 2012 21:36:30 -0700 > From: TAUFIQ WAHYUDI <taufiq.wahyudi.12(a)gmail.com> > To: openbsc(a)lists.osmocom.org > Subject: new comer > Message-ID: > <CACxKs184Ma=PeW5sPi=HWWJm6xb+sqywmHBEgMs+XKKqiXEy+g(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > hi all, > > i am new comer in this group, i already have installed openbsc until to > this step, i have problems would you mind all giving me a hand in the > future? > > thank you very much > > Best Regards >

12 years, 9 months

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