gmr

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55 discussions

OsmoDevCon 2022 ?
by Harald Welte 10 Mar '22

10 Mar '22

Dear fellow Osmocom developers, as you all know, we've sadly had to skip OsmoDevCon 2020 and 2021, trying to compensate it at least to some extent with our OsmoDevCall every two weeks. The COVID-19 pandemic is far from over, and we don't know what the upcoming winter season will bring. Nevertheless, I think it would be a good idea to start a discussion of whether we should plan for an OsmoDevCon in 2022. I personally would say let's plan for the usual late April 2022 time frame, and if the pandemic situation deteriorates, we can still cancel it with something like one month lead time. I would also personally suggest to limit attendance to people who are fully vaccinated, and in addition do a self-test for all participants every morning. In terms of venue, we might also consider to move to a venue that allows better ventilation. Irrespective of the above we can also bring the air filters from the sysmocom office. So with that as an input statement, I would like to hear your opinion on the above proposals. Who would want to attend? Any complaints against the "vaccinated only plus daily self-tests in the morning" approach? Regards, Harald -- - Harald Welte <laforge(a)osmocom.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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osmo-live error
by 선경미 26 May '21

26 May '21

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Few questions about Osmo-GMR
by Anton Minchev 25 May '21

25 May '21

Hello , last week i worked with osmo-gmr projest ,but still have some questions: 1. I need some more info about S band GMR - what sat is this , az / el , what trafic etc. 2. About gmr1 ambe decode - i tried about dozens of .dat files from gmr1 rx live , some give me ! codec errors , some not , but all .wav audio files are scrambled ,speesh is not recognized at all .. is there some clear traffic at all, or all is A5/2 coded ? 3. If all is scrambled where i may find offline tables / H n matrix/,any source that may generate them ? And if i have tables how they will be integrated with existing osmo-gmr ? I see gmr1_gen_mat that generates G/g matrix .. some more info about that .. .G and .g files seems so small .. Thanks in advance !

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rach
by Peter Wallereres 27 Dec '20

27 Dec '20

Dear list , i am still trying to compile the gnuradio blocks for the rach. But the building stops after 52%. Could it be that there is something wrong in the source code? Anyone else already succeeded to build the blocks? I am using Ubuntu 18.04.5 LTS, with gnu-radio 3.7, the compiler give me the following error: [ 52%] Building CXX object lib/CMakeFiles/gnuradio-gmr1.dir/gsmtap_sink_impl.cc.o /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/lib/gsmtap_sink_impl.cc: In constructor ‘gr::gmr1::gsmtap_sink_impl::gsmtap_sink_impl(const string&, uint16_t)’: /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/lib/gsmtap_sink_impl.cc:58:27: error: ‘PDU_PORT_ID’ was not declared in this scope message_port_register_in(PDU_PORT_ID); ^~~~~~~~~~~ /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/lib/gsmtap_sink_impl.cc: In member function ‘void gr::gmr1::gsmtap_sink_impl::send_pdu(pmt::pmt_t)’: /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/lib/gsmtap_sink_impl.cc:94:2: error: invalid conversion from ‘const uint8_t* {aka const unsigned char*}’ to ‘uint8_t {aka unsigned char}’ [-fpermissive] )); ^ /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/lib/gsmtap_sink_impl.cc:94:2: error: invalid conversion from ‘size_t {aka long unsigned int}’ to ‘const uint8_t* {aka const unsigned char*}’ [-fpermissive] /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/lib/gsmtap_sink_impl.cc:94:2: error: too few arguments to function ‘msgb* gmr1_gsmtap_makemsg(uint8_t, uint16_t, uint32_t, uint8_t, const uint8_t*, int)’ In file included from /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/lib/gsmtap_sink_impl.cc:34:0: /home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/../include/osmocom/gmr1/gsmtap.h:36:14: note: declared here struct msgb *gmr1_gsmtap_makemsg( ^~~~~~~~~~~~~~~~~~~ lib/CMakeFiles/gnuradio-gmr1.dir/build.make:309: recipe for target 'lib/CMakeFiles/gnuradio-gmr1.dir/gsmtap_sink_impl.cc.o' failed make[2]: *** [lib/CMakeFiles/gnuradio-gmr1.dir/gsmtap_sink_impl.cc.o] Error 1 CMakeFiles/Makefile2:254: recipe for target 'lib/CMakeFiles/gnuradio-gmr1.dir/all' failed make[1]: *** [lib/CMakeFiles/gnuradio-gmr1.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2

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S-Band Base frequency
by Peter Wallereres 09 Dec '20

09 Dec '20

Someone can tell me what the base frequency for s-band is, to calculate the arfcn. I found this info, but i am not sure what is ul/dl, and if the frequencies are correct. 2.170.000.000 - 2.200.000.000 1.980.000.000 - 2.010.000.000

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gmr-1-3g
by Peter Wallereres 09 Dec '20

09 Dec '20

Someone can give me some info how to use the gmr-1-3g branch for GmPRS? Thank you!

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gmr1_rach_scan
by Peter Wallereres 05 Dec '20

05 Dec '20

Hi, I try to use the gmr1_rach_scan flowgraph, but did not succeed. I am always getting this error: Traceback (most recent call last): File "/home/peter/Radio/Thuraya/sylvain-gr/osmo-gmr/gr-gmr1/apps/gmr1_rach_scan.py", line 22, in <module> from gnuradio import gmr1 ImportError: cannot import name gmr1 Anyone can help me how to compile and install correctly the needed blocks for the flowgraph? Thank you.

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Decoding example data with osmo-gmr
by Johann T. 22 Sep '20

22 Sep '20

Hi, I have been looking into the example data provided by Osmocom as shown in the link below. http://osmocom.org/projects/gmr/wiki/Example_Data I could reproduce the first pcap output (up to the Ciphering Mode Command) for the Voice call using the gmr1_rx_live from the live branch. With the provided Kc, I thought I would be able to reproduce the second pcap (including the call setup). I have modified the sa_tch3.c to include the Kc code. However, I am not able to get the results as shown in the second pcap file. I noticed that in the sa_tch3.c code, there is a ciphering part (marked by "Retry with ciphering") which was disabled. This part of code didn't compile as some variables were not defined. Probably my approach was not right. Any pointer here? Which code is needed to produce the second pcap (deciphered) file given the Kc is known? Many thanks in advance. Best regards, Johann

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OsmoDevCon / COVID-19
by Harald Welte 04 Sep '20

04 Sep '20

Dear fellow Osmocom developers, as you all know, we've sadly had to postpone OsmoDevCon 2020 back in April this year. At the time, we discussed to re-visit the situation in October 2020. While legally it is no problem at all to host an event with ~ 20 participants in Berlin/Germany (specific regulations really only start from 50+ participants) - I'm not entirely convinced it would be the smartest move. Legality and public health regulations are only one part of the equation - common sense and profound care for the key members of our community for sure are more relevant considerations to me. I'm not 100% in favour and not 100% against. Hence, I would like to get your input. Should we a) try to get an event organized on-site in Berlin? We'd have to move to a larger venue than IN-Berlin with proper ventilation and sufficient space so we can keep physical distance, but I think that's manageable for sysmocom as organizer. b) simply postpone to 2021? I'm convinced the situation will not change significantly (in a positive way) until late April 2021, so it's not really a "solution" as it will likely mean we have to think of late 2021 or 2022. c) plan some kind of online conference? To be honest, I think this model works fine for events where a single speaker wants to give lectures to hundreds or thousands of participants. But OsmoDevCon is much more interactive. We could record or live-stream some talks or screencasts from home, sure. But that only captures one part of the event. We could also try to set a date for a collaborative mumble, or the like - for the "hallway track". What are your thoughts? Let's avoid cross-posting the discussion to all of the mailing lists and simply have it on openbsc(a)lists.osmocom.org. Regards, Harald -- - Harald Welte <laforge(a)osmocom.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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Osmocom scheduled outage on *2020-07-19 9am CEST*
by Harald Welte 19 Jul '20

19 Jul '20

There is an urgent need to migrate our most important public infrastructure to a new server, and I will be doing that on *Sunday, July 19 2020*, starting about 9am CEST. The migration involves redmine (main osmocom.org website), jenkins, gerrit, git, and cgit. In theory, the migration should be quick. I would expect (significantly) less than one hour of downtime. However, we all know Murphys law. Services not affected are mail (including mailman lists), ftp, dns. So in case of doubt, we can still use mailing lists to communicate. In case anyone urgently needs osmocom source code on Sunday morning during the downtime: There are public mirrors available on github. Regards, Harald -- - Harald Welte <laforge(a)osmocom.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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