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4315 discussions

eSIM for private networks
by Sipos Csaba 13 Nov '24

13 Nov '24

Dear Harald, I watched your excellent presentation on eSIMs and I have two questions just to make sure I understand the situation correctly. 1. Both the eSIM profile and the SM-DP+ server's certificate has to be signed by the GSMA in order to be able to provide eSIM services to commercial handsets? 2. If the above is the case, that means we effectively lost control of the SIM infra, as we always have to rely on 3rd party SM-DP+ and eSIM profile providers who can provide the necessary signing for both the eSIM profiles and the SM-DP+ server certs signed by GSMA? Based on what you implied during the OsmoDevCall call about getting certified, I am under the impression that Sysmocom will not be able to provide nor eSIM profiles nor SM-DP+ services that can be used for commercial handsets? If this is the case, can you kindly redirect me to a vendor/provider who you have good experience with in this regard? Much appreciate your help! Regards, Csaba

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connect osmo-BTS-trx to any other commercial Network
by Masumeh Sadat Tohidi 12 Nov '24

12 Nov '24

Hi. Is It possible to connect osmo-BTS-trx to any other commercial BSC and MSC?

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I have installed osmo-bts-trx and osmo-trx-uhd on one machine (IP: 192.168.75.174), and on another machine, I installed osmo-bsc, osmo-msc, and osmo-hlr (IP: 192.168.75.185). How should I set the IP addresses in their configuration files? in osmo-bts-trx: osmotrx ip local ? osmotrx ip remote ? oml remote-ip ? in osmo-trx-uhd bind-ip ? remote-ip ? Also in bsc what config should be change?
by Masumeh Sadat Tohidi 12 Nov '24

12 Nov '24

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Expert Help with Statistics Assignment: Boost Your Grades Today
by martinklay09＠gmail.com 09 Nov '24

09 Nov '24

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Expert Help with Statistics Assignment: Boost Your Grades Today
by martinklay09＠gmail.com 09 Nov '24

09 Nov '24

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BladeRF or LimeSDR for running osmo-bts-trx
by Mychaela Falconia 29 Oct '24

29 Oct '24

Hello Osmocom community, (Cc'ing Eric per instructions from Harald) I am looking to acquire an SDR device for the purpose of running osmo-bts-trx. My initial goal is to get to the bottom of some mysteries observed in OS#6579; because it is CSD, getting a non-virtual test setup requires an SDR-based BTS rather than the otherwise wonderful sysmoBTS. And of course there will likely be other fixes and improvements that can be made in osmo-bts-trx. :) Harald recommended that I get a BladeRF 2.0 xA4 for this purpose, plus a Leo Bodnar GPSDO. However, before I commit to buying that hw with an aggregate cost of around $800, I wanted to get some community input to make sure it is the right choice for the job at hand. (There is also the possibility that Sysmocom will sponsor this hw for me, which is wonderful - but still, I don't want to waste money even if it's someone else's!) Harald told me that Eric has worked on BladeRF, and instructed me to ask both Eric and the wider community. My basic question is: how stable and reliable is this BladeRF 2.0 in the BTS application? I presume I will need to run osmo-trx-bladerf, but I find it alarming that there is absolutely no documentation for this variant: the wiki and the user manual cover osmo-trx-uhd and osmo-trx-lms, but not one mention of BladeRF. It is my understanding that BladeRF always runs on 38.4 MHz clock; if the external clock frequency is some other, the PLL inside BladeRF will discipline the local 38.4 MHz VCXO to "follow" the external reference, but the SDR will still run at 38.4 MHz. Thus I see no way to avoid fractional resampling, i.e., configuring the external GPSDO to put out 26 MHz or 52 MHz won't do anything to eliminate that fractional resampling need. Hence the question: does this fractional resampling constitute a real problem, or is it a sufficiently minor defect such that one can live with it in a lab environment? Will there be any gotchas to be aware of, such as MS struggling to connect to the test network? Finally, how does this BladeRF compare to various LimeSDR options? It seems like LimeSDR has always been the popular choice in the "cheap" department, whereas for BladeRF I see not one mention anywhere as I already noted. How do these two options compare? I recall hearing that while LimeSDR was once very popular, people were also having problems with it. Is BladeRF now better in terms of stability, or not really? And if BladeRF really is a better choice than LimeSDR for the purpose of running an SDR BTS on something cheaper than Ettus hw, then how did we get into the peculiar situation of having documentation that covers LimeSDR but not BladeRF? Please help this SDR-ignorant gal figure out which hardware I should buy. Whether I cover the cost on my own or take up Harald's offer of cost reimbursement, either way I need to be sure I buy the right thing... Oh, one more detail: whichever USB-interfaced SDR I get, I plan on using a Raspberry Pi 5 to drive it, running stock Raspbian. Does anyone have any experience with using RPi devices to drive SDRs for use as BTS? Is RPi5 powerful enough to run all of the computationally demanding parts, including that fractional resampling? Is stock Raspbian good enough in terms of sw dependencies? TIA, Mychaela

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Ericsson RBS6000 surplus situation
by Mychaela Falconia 17 Sep '24

17 Sep '24

Hello fellow Osmocomers, I just recently came across and watched Harald's ODC 2018 presentation about Ericsson RBS 6000. The part that intrigued me: Harald said in that year that this hardware was available quite inexpensively and plentifully; he said that a DUG10+RUG pair could be had for around 300 EUR in that year. My question to the community: what is the current situation 6 y later? Is there still any above-zero supply of either DUG10+RUG or DUG20+RUS surplus hardware? If a nonzero supply does exist, what is the typical price these days? In that 2018 presentation Harald also mentioned that the successor to DUG20 was DUS31/DUS41, and that those DUS units (which support GSM, WCDMA and LTE all in one box) have integrated SIU02 equivalent instead of native E1 interfaces. Hence question: has anyone in Osmocom cracked the E1-over-IP protocol spoken by SIU02 and its later incarnations, allowing Osmocom CNI to drive the GSM part of DUS31 etc, or is such operation beyond our current community capabilities? There are rumors going around that T-Mobile USA may be shutting down some Ericsson 2G equipment (though I still never got any clear answers as to what equipment it might be, if any), hence I am trying to brush up on my knowledge of this platform. M~

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USRP1 not wanting to transmit (osmo-trx-usrp1)
by laptop fm 05 Sep '24

05 Sep '24

Hello, I tried using the osmocom stack with the usrp1 and I encountered this error : DMAIN NOTICE Starting the transceiver (Transceiver.cpp:287) DDEV NOTICE Setting TX gain to 0 dB. (USRPDevice.cpp:265) DDEV NOTICE Setting RX gain to 20 dB. (USRPDevice.cpp:292) DDEV NOTICE Setting TX gain to 0 dB. (USRPDevice.cpp:265) DDEV NOTICE Setting TX gain to 0 dB. (USRPDevice.cpp:265) DDEV NOTICE Setting TX gain to 0 dB. (USRPDevice.cpp:265) DMAIN NOTICE Stopping the transceiver (Transceiver.cpp:345) after that the osmo-trx-usrp1 seems to crash. I know it is not supported anymore but any possible fix would be appreciated. here is my system and log files together with a pcap : System : Debian 12 amd64 using osmocom-nightly repo (the stable repo still gives the same error)

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subdivide large .ttcn files for faster dev cycle
by Neels Hofmeyr 31 Aug '24

31 Aug '24

I've raised this some years ago, then had gotten the response that our .ttcn files should grow to any size, and we should fix the tooling instead or buy a faster computer. But I'm still having the annoyance when working with our ttcn that even changing a tiny constant will trigger a longish recompilation. It looks like it is dividing a .ttcn into parts, and keeps recompiling *all* of the parts. (not always all of the parts, but usually it is clumsy about compiling more than would be logically required from my POV.) It looks like this: + make -j 5 Creating dependency file for HNBGW_Tests_part_6.cc Creating dependency file for HNBGW_Tests_part_5.cc Creating dependency file for HNBGW_Tests_part_4.cc Creating dependency file for HNBGW_Tests_part_3.cc Creating dependency file for HNBGW_Tests_part_2.cc Creating dependency file for HNBGW_Tests_part_1.cc Creating dependency file for HNBGW_Tests.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -c -DLINUX -DMAKEDEPEND_RUN -DUSE_SCTP -DLKSCTP_MULTIHOMING_ENABLED -DAS_USE_SSL -I/usr/include/titan -fPIC -o HNBGW_Tests.o HNBGW_Tests.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -c -DLINUX -DMAKEDEPEND_RUN -DUSE_SCTP -DLKSCTP_MULTIHOMING_ENABLED -DAS_USE_SSL -I/usr/include/titan -fPIC -o HNBGW_Tests_part_1.o HNBGW_Tests_part_1.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -c -DLINUX -DMAKEDEPEND_RUN -DUSE_SCTP -DLKSCTP_MULTIHOMING_ENABLED -DAS_USE_SSL -I/usr/include/titan -fPIC -o HNBGW_Tests_part_2.o HNBGW_Tests_part_2.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -c -DLINUX -DMAKEDEPEND_RUN -DUSE_SCTP -DLKSCTP_MULTIHOMING_ENABLED -DAS_USE_SSL -I/usr/include/titan -fPIC -o HNBGW_Tests_part_3.o HNBGW_Tests_part_3.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -c -DLINUX -DMAKEDEPEND_RUN -DUSE_SCTP -DLKSCTP_MULTIHOMING_ENABLED -DAS_USE_SSL -I/usr/include/titan -fPIC -o HNBGW_Tests_part_4.o HNBGW_Tests_part_4.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -c -DLINUX -DMAKEDEPEND_RUN -DUSE_SCTP -DLKSCTP_MULTIHOMING_ENABLED -DAS_USE_SSL -I/usr/include/titan -fPIC -o HNBGW_Tests_part_5.o HNBGW_Tests_part_5.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -c -DLINUX -DMAKEDEPEND_RUN -DUSE_SCTP -DLKSCTP_MULTIHOMING_ENABLED -DAS_USE_SSL -I/usr/include/titan -fPIC -o HNBGW_Tests_part_6.o HNBGW_Tests_part_6.cc env CCACHE_SLOPPINESS=time_macros ccache g++ -shared -o HNBGW_Tests.so HNBGW_Tests.o env CCACHE_SLOPPINESS=time_macros ccache g++ -shared -o HNBGW_Tests_part_3.so HNBGW_Tests_part_3.o env CCACHE_SLOPPINESS=time_macros ccache g++ -shared -o HNBGW_Tests_part_4.so HNBGW_Tests_part_4.o env CCACHE_SLOPPINESS=time_macros ccache g++ -shared -o HNBGW_Tests_part_2.so HNBGW_Tests_part_2.o env CCACHE_SLOPPINESS=time_macros ccache g++ -shared -o HNBGW_Tests_part_1.so HNBGW_Tests_part_1.o HNBGW_Tests_part_5.cc: In function ‘OCTETSTRING HNBGW__Tests::f__gen__one__compl__l3(const Compl3Type&, const MobileL3__CommonIE__Types::MobileIdentityLV_template&, const INTEGER&)’: HNBGW_Tests_part_5.cc:2130:1: warning: control reaches end of non-void function [-Wreturn-type] 2130 | } | ^ env CCACHE_SLOPPINESS=time_macros ccache g++ -shared -o HNBGW_Tests_part_5.so HNBGW_Tests_part_5.o env CCACHE_SLOPPINESS=time_macros ccache g++ -shared -o HNBGW_Tests_part_6.so HNBGW_Tests_part_6.o I want a fast dev cycle, and the ttcn dev cycle is slow: after a tiny edit, the CPU spools up and the fan goes for a whole while, and I get bored and irritated. When I'm on a train ttcn compilation drains the battery... My local workaround was to create a second file, like BSC_Tests_2.ttcn, with only my new test in it. Then compilation cycles are rapid. But that requires modifying all sorts of s/private/friend and even only moving the code is another annoyance. If I want to apply CR, I won't move it back and forth, so usually I end up with two copies and get confused. So my local workaround isn't working out very well. Why am I writing this here? Because I would like to request that we start subdividing our ttcn into smaller compilation units, not as my local workaround but permanently in our upstream. Please? ~N -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> https://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Siemensstr. 26a * 10551 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte

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Planning to tag a new libosmocore release
by Oliver Smith 17 Jul '24

17 Jul '24

Hi all, we're planning to tag a new libosmocore release. If anyone has concerns about some APIs not being stable in master, then please speak up :) Best regards, Oliver -- - Oliver Smith <osmith(a)sysmocom.de> https://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Siemensstr. 26a * 10551 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte

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