UmTRX

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189 discussions

Multi-bts with a single UmTRX
by delec.mobin＠gmail.com 30 May '23

30 May '23

Hi I have an UmTrx -v2.3.2 and I am trying to implement the multi-BTS feature using Osmocom projects and a single umtrx, as outlined here https://umtrx.org/multi-bts-with-osmocom-and-a-single-umtrx/. However, I encountered some issues and couldn't able to get it working. in the spectrum, I only saw two single-tone signals for the two BTS. I am afraid maybe I am using the wrong branches of projects. I am not sure which branches correspond to the master branch from 2015, as the fairwaves' blog is from that year. here are my setup details: ubuntu 20.04 UHD (branch:3.9-LTS) UHD-Fairwaves(branch: master) libosmocore (tag:0.9.6) libosmo-abis (tag:0.4.0) libosmo-netif (tag:0.0.6) libosmo-sccp (tag:0.7.0) openbsc (branch:fairwaves/master) first osmo-bts (branch: fairwaves/0.3.0-fw-4, with ./configure --enable-trx ) second osmo-bts (branch:achemeris/2sector, with ./configure --prefix=/usr/local/special/2sector --enable-trx ) osmo-trx (branch:achemeris/2sector) I was wondering if you could provide more specific guidance on which version of the Osmocom projects I should use. Is there any additional documentation or resources that could be helpful in this regard? Thank you for your assistance, and I look forward to hearing back from you soon. Best Regards, Mobin

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None
by None 03 Jan '22

03 Jan '22

SIP endpoint (IMSI X @ cell Y) to another SIP endpoint (IMSI X @ cell Z). (Here "cell" can be understood as "OpenBTS instance".) The call transfer is managed by the SIP front-end. Assuming for the purpose of discussion that the "SIP front-end" would be FreeSwitch, it could be embeded inside the host that runs OpenBTS (FreeSwitch would only use a tiny part of CPU compared to e.g. the transceiver), so this would appear like a "black box that does SIP" to the outside world even though the functionality are split between two components (FreeSwitch and OpenBTS) internally. # Handover decision process outside of OpenBTS The other aspect we agreed on, was that the decision process of when to do handover should be better left outside of OpenBTS so that it can be implemented by the carrier rather than a static function inside OpenBTS. This allows a carrier to implement the call-control functionality either as a distributed system (e.g. alongside OpenBTS and FreeSwitch inside the "embedded" device) or a centralized system. This also allows them to use different sets of data and policies to decide when to switch a mobile to/from different bands, etc. (Jean-Samuel makes the point that handover is used nowadays to help with frequency management / load-balancing, alongside its historical role for geographical handover.) In turn this makes the requirements for Measurement Report in OpenBTS very simple: OpenBTS only needs to send SIP "UPDATE" messages when receiving Measurement Reports messages. There's no need to process the Measurement Reports inside OpenBTS itself. (I will have to specify the content of the UPDATE message separately based on GSM 04.08 section 10.5.2.20.) Combining this with the previous section leads to a model where the carrier's handover-decision code interfaces on one side with OpenBTS (via UPDATE messages) and on the other side with the SIP call-control element (FreeSwitch), either via a specific interface (e.g. ESL in FreeSwitch) or via regular SIP third-party-call-control. The call-control elements then transfers the call from one OpenBTS instance to another OpenBTS instance (for example by iniatiting a REFER towards the calling SIP element -- but since we split OpenBTS and FreeSwitch, we don't have to add support for REFER in OpenBTS!). In any case this gives a potentially highly-distributed handover mechanism that doesn't have the limitations of inter-MSC handover, the process is entirely peer-to-peer. I'm probably forgetting to mention some other topics, just wanted to put this in writing for discussion as early as possible. S. -- Stéphane Alnet. Telecom Artisan. OpenSource Advocate. Development and integration for FreeSwitch, OpenSIPS, CouchDB, Node.js. Mobile: +33643482771 - http://shimaore.net/ - https://github.com/shimaore/

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None
by None 03 Jan '22

03 Jan '22

about it and demonstrate it operating OpenBTS and OsmoBTS. I could talk about our open-source development of OpenBTS, if there would be any interest. Also I'd love to talk about OsmoBTS/OpenBSC which the new cool. Only few people heard about OsmoBTS, while it provides great capabilities: * it works with off-the-shelf SDR transceivers like UmTRX * it could use VoIP (SIP) soft-switches to connect calls * it connects to MSCs of legacy GSM networks * it supports encryption, handover, FR/HR/AMR codecs and GPRS (in beta) * standards compliant L1/L2 layers, so there are no issues with various phone models I love Osmocom approach to development as well - development is open to all contributors, the code is well structured and tested, even build results for all sub-projects are available through a continuous integration suite: http://jenkins.osmocom.org/jenkins/ On Sat, May 4, 2013 at 9:00 AM, Robin Coxe <coxe(a)close-haul.com> wrote: > (Apologies for cross-posting. We wanted to reach everyone who might be > interested in attending. Please respond responsibly.) > > Anders Brownworth (Switchcoder), Alexander Chemeris (Fairwaves), and Robi= n > Coxe (Close-Haul Communications & Analog Devices) invite those interested= in > open GSM hardware and software development to an informal gathering in > Cambridge, MA on Friday 10 May 2013 from 6-8 pm. Alexander will be visit= ing > the Boston area from Moscow. > > If you are interested in participating in any capacity in the Boston-area > open source GSM development community, we look forward to meeting you. O= ur > goal is to identify like-minded people involved in or interested in learn= ing > more about projects such as OpenBTS, OsmocomBTS, OsmocomBB, and OpenBSC. > If you have a portable, self-contained demo, feel free to bring it with y= ou. > > When: Friday 10 May 2013, 6-8 pm EDT > Where: Cambridge Innovation Center, 1 Broadway, 4th Floor, Cambridge, MA > 02142 USA > Photo ID required for building entry. > > Please RSVP on Eventbrite: http://opengsmboston.eventbrite.com/ > > > > > > > > --=20 Regards, Alexander Chemeris. CEO, Fairwaves LLC / =D0=9E=D0=9E=D0=9E =D0=A3=D0=BC=D0=A0=D0=B0=D0=B4=D0= =B8=D0=BE http://fairwaves.ru

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None
by None 03 Jan '22

03 Jan '22

control scripts have been moved from UHD repository to a separate repository: https://github.com/fairwaves/umtrx_scripts On Fri, Jan 25, 2013 at 1:07 AM, Alexander Chemeris <alexander.chemeris(a)gmail.com> wrote: > Hi all, > > Just to let everyone know - in addition to working on manufacturing > issues we're improving our UmTRX firmware and software support right > now. And today we've got dual-channel finally working. Thanks to > Andrew Karpenkov for his awesome work on implementing the second > channel support in FPGA! > > I plan to push the pre-built FPGA image to the download area in the > during the weekend and Andrew will publish the FPGA code changes soon > too. > > What's ahead of us is to teach OpenBTS to use the second channel of > UmTRX. This includes support of two independent channels and then > implementation of switched diversity receive. > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / =D0=9E=D0=9E=D0=9E =D0=A3=D0=BC=D0=A0=D0=B0=D0=B4=D0= =B8=D0=BE > http://fairwaves.ru --=20 Regards, Alexander Chemeris. CEO, Fairwaves LLC / =D0=9E=D0=9E=D0=9E =D0=A3=D0=BC=D0=A0=D0=B0=D0=B4=D0= =B8=D0=BE http://fairwaves.ru

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None
by None 03 Jan '22

03 Jan '22

protocol added in HS-2), so I'll be getting the HS-2. Any news on when delivery will start for umtrx v2? S.

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OsmoDevCon 2018 schedule planning
by Harald Welte 06 Dec '17

06 Dec '17

Dear Osmocom Community, [please respect the Reply-To and post all follow-up discussion to this to openbsc(a)lists.osmocom.org, so we avoid having long threads cross-posted to several mailing lists.] Like every year in early December, it is time to discuss as schedule for OsmoDevCon in the upcoming year. Note: Ths is about OsmoDevCon, the more private meeting of developers, *NOT* about OsmoCon, the public conference. == When, Who, Where == I propose the following date for OsmoDevCon 2018: April 20 - April 23rd, 2018 * Who: Active developers/contributors of Osmocom projects (as usual) * Where: IN-Berlin, Berlin (as usual) Please let me know ASAP if that proposed date works for everyone who'd want to attend. We can still change it now, but I would want to nail down the date pretty soon. == Format == After the experiment of reducing from 4 to 3 days last year (due to OsmoCon), we will again go for *four days* in 2018. However, we should clearly divide the days in a way that e.g. "GSM/3G" topics are on two days, while SDR+Other topics are on the other days, so people not interested in some topics can skip one or two days, as needed. We could even divide it further like: * 1 day 3GPP RAN (osmo-bts, osmo-bsc, osmo-pcu, virt_phy, fake_trx, ...) * 1 day 3GPP CN (osmo-msc, osmo-hlr, osmo-sip-connector, nextepc, etc.) * 2 days misc Regards, and looking forward to meeting you [again] in 2018, 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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umtrx not booting
by sami 03 May '17

03 May '17

Hi, I have a umtrx v2.1 which is not booting anymore. When I power it, only led F and H turn ON and stay in this state forever. Is there anything that can be done ? best regards,

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Get GPRS using Osmocom and UmTRX
by Родион Гадыршин 25 Dec '16

25 Dec '16

Hello, list. My hardware is Umtrx v2.1 and I have already built GSM components: Osmo-trx (branch fairwaves/master) libosmocore (branch: master) libosmo-abis (branch: master) libosmo-sccp (branch: master) libosmo-netif (branch: master) openBSC (branch: fairwaves/master, I use OsmoNITB) osmoBTS (branch: fairwaves/master. Also did ./configure --enable-trx at the installation process) So now SMS and calls work fine. Then I want to get GPRS up. I use master branch of openggsn and master branch of osmo-pcu (osmo-sgsn is supplied with osmoNITN). But when I start osmo-pcu, it says: "PCU interface version number of BTS (5) is different (7). Please re-compile!". After that osmo-pcu aborts. Could you please tell me what branches to use for correct work of GPRS?

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RFC: OsmoDevCon 2017 planning
by Harald Welte 10 Dec '16

10 Dec '16

Dear Osmocom Community, [please respect the Reply-To and post all follow-up discussion to this to openbsc(a)lists.osmocom.org, so we avoid having long threads cross-posted to several mailing lists.] >From 2012 to 2016 we were running a series of small, invitation-only Osmocom Developer Conferences. Access was intentionally restricted to those community members who have demonstrated an existing track record of contribution to any of the projects under the Osmocom umbrella. This format of a small, tightly knit group of about 20 people has been successful over the years, and I have received a lot of positive feedback from past participants. On the other hand, the Osmocom project has grown in scope and diversity, and some of those projects don't have all that much relationship to each other - except being started by people from within the same group. There's the cellular communications (GSM/GPRS/EDGE/UMTS and hopefully at some point LTE) protocols which is attracting a lot of professional users. And then there's pure community projects like rtl-sdr, OsmocomBB, OsmocomGMR and many other efforts. Particularly the cellular infrastructure projects (OsmoBTS, OsmoPCU, OsmoBTS, OsmoNITB, OsmoSGSN, OpenGGSN, OsmoIuh & co) are somehow "standing out" of the othe projects in the context of having a wider user bsae, and in that user base also primarily commercial users. So I'd like to start a discussion on how to possibly change the event format to accomodate the various interests and parties. I definitely don't want to loose the "annual meeting of old friends" atmosphere, while at the same time also opening up to other interested parties. One idea would be to keep OsmoDevCon as-is and have a separate event where non-contributing/developing users / sysadmins / system integrators could also be attending. Another idea would be to split into a 'user day' and 'developer days' format. This is something the netfilter developer workshops have been using for many years, and from my limited insight quite successfully so. The "user day" is more like a traditional tech conference, with a large auditorium and talks oriented towards users / sysadmins / integrators of the software. The "developer days" are the invitation-only part, for known contributing developers only, similar to what we have at OsmoDevCon. Having both events (or both parts of an event) back-to-back has the advantage that a large number of potential speakers for the 'user day' are already present, and they don't have to travel yet another time. One could even structure it further and say we have one user day, one public 'Osmocom cellular developer day' and then the closed 'OsmoDevCon classic', maybe reduced from 4 days to 3 or even 2 days only? What is the general opinion about this? Are there people lurking on this list who would be interested in attending a public 'user day' or even 'developer day' about the Osmocom cellular projects, with presentations and workshops around topics such as running Osmocom based cellular networks? In terms of when/where, I would suggest to keep the tradition of April in Berlin/Germany. But I'm of course very happy if somebody wants to host it some place else... Regards, and looking forward to meeting you [again] in 2017, 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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UmTRX - Change IP Address
by Osman Özkan 04 Oct '16

04 Oct '16

Hi By default the IP address of the UmTRX board is 192.168.10.2. The problem is that I can't have two boards on the same network, so I would like to change the IP address of my boards to make them unique on the network. How can I do that? Thanks, -Osman

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