gmr

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55 discussions

GMR voice
by fe8769 08 Jul '20

08 Jul '20

hello in /tmp/ I have some .dat files like : /tmp/gmr1_speech_928_1_309814.dat . I think it is voice extract from arfcn 928 I tried ./gmr1_ambe_decode /tmp/gmr1_speech_928_1_309814.dat I have stout garbage I tried to review code in gmr1_ambe_decode.c to understand but I'm too bad is it the way it is working ? Thanks again --

2 1

need some explaination
by fe8769 08 Jul '20

08 Jul '20

hello I need some explanations of the way it is working this line is working fine ./gmr1_rx_sdr.py --args airspy -a 927 -s 6000000 -B L -f 1553968750 -g 19 -b 40 then after ./gmr1_rx 4 /tmp/arfcn_927.cfile wireshark is giving all informations I have "immediate assignment on ARFCN 928 929 930 931 I tried to do the same with 928 929 930 931 ./gmr1_rx_sdr.py --args airspy -a 929 -s 6000000 -B L -f 1554031250 -g 25 -b 40 with 1 Gb of datas, I can retrieve only 2 frames in wireshark I'm sure there is traffic on these 4 channels Is "immediate assignment " means TCH3 and voice ? I tried all branches on git hub with same result What is usage of gmr1_process_recording.py ? and arguments What is usage of gmr1_ambe_decode and gmr1_rach_gen Thanks for help --

3 4

Thuraya ARFCN
by Johann T. 04 May '20

04 May '20

Dear all, In the past weeks, I have been playing with the Osmocom GMR code. The code has been successfully compiled and installed. My intention is to listen to the broadcast channel of Thuraya in the Netherlands. There are two spotbeams for NL namely 288 and 289. As I am located at the border of the two beams, I have tried both options. So far I couldn't see anything decoded in Wireshark. I noted that the translation of ARFCN to frequency is slightly different in the formula by Driessen (Practical cryptanalysis of the real world systems) and in the ETSI standard (TS 101 376-5-5). There is a shift of half of the channel bandwidth (31.25 kHz). For your information, I am using Ubuntu 16.04, USRP B210, a wideband antenna and LNA with about 20 dBi gain on L-band. As mentioned by Sylvain in the mailing list, the gmr_multi_rx.py is obsolete. I am using the gmr1_rx_sdr.py for my tests. I ran the following commands (one each time) and with Wireshark listening to lo interface while applying the gmr1.bcch filter. Is this the right approach as I don't see anything show up so far? Did I overlook something here? Spotbeam 289 (ARFCN 1007) ./gmr1_rx_sdr.py -s 10000000 -B L -f 1556484375 -a 1007 -g 45 (Driessen) ./gmr1_rx_sdr.py -s 10000000 -B L -f 1556468750 -a 1007 -g 45 (ETSI) Spotbeam 288 (ARFCN 267) ./gmr1_rx_sdr.py -s 10000000 -B L -f 1533359375 -a 267 -g 45 (Driessen) ./gmr1_rx_sdr.py -s 10000000 -B L -f 1533343750 -a 267 -g 45 (ETSI) Comments or suggestions are much appreciated. Many thanks in advance. Best regards, Johann

2 3

OsmoDevCon 2020 registration
by Harald Welte 01 Dec '19

01 Dec '19

Dear fellow Osmocom developers, I would like to invite all developers and contributors to Osmocom [sub]projects to register for OsmoDevCon 2020 (held on April 24th-27th, 2020 in Berlin). For details known so far, please check http://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCon2020 Please enter your name at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCon2020#Requested in case you would like to attend. Registering early allows proper planning. Thanks! Looking forward to meeting old and new Osmocom developers in April 2020. 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)

1 0

gr-gmr1
by Ahmed Moudou 17 Oct '19

17 Oct '19

while compiling the gr-gmr1 code i got a problem while compiling it (the make command ). How can I resolve this problem illustrated in the screenshot below? thanks in advance. cheers

1 0

need help
by fe8769 02 Oct '19

02 Oct '19

Hello Thanks to *mohamed yehia* for great help in understanding in osmo-gmr project . In wireshark I saw "immediate assignment" are displaying a different ARFCN than one I was listen too . That means that TCH3 channel is on another ARFCN . What is the way to follow both ARFCN ? I didn't find the ./gmr_multi_rx utility on git (wiki says : ./gmr_multi_rx --gmr1-dl 941 942 -a RX2 -S B:0 -T 10 -is kc extrat the same way as gr-gsm with rainbow tables ? thanks --

2 1

RACH intercepting
by mohamed yehia 11 Sep '19

11 Sep '19

Dear community members, I'm interested in intercepting L band up-link RACH channel I found the BCCH channel of the spot beam I'm currently in then scan the same ARFCN but in uplink I had a cfile and I tried to read it using gr-gmr1 <https://github.com/osmocom/osmo-gmr/tree/sylvain/gr/gr-gmr1> in the branch sylvain/gr <https://github.com/osmocom/osmo-gmr/tree/sylvain/gr> but i have no results , may be I don't know how to use the read utility in sylvain/gr <https://github.com/osmocom/osmo-gmr/tree/sylvain/gr> I also have another question about the file test.pcap in http://people.osmocom.org/tnt/gmr/ how can I have a file like it and is it l band RACH data or C band. -- *Best Regards , * *Mohamed Yehia Mohamed * Mobile : +2 0102 674 5023

2 1

(no subject)
by Ahmed Moudou 30 Apr '19

30 Apr '19

hi I'am new with ubuntu cd osmo-gmr/utils/gmr_multi_rx make TARGET=uhd cd ../../.. You changed the code osmo-gmr and it was integrated in the Jenkins platform You didn't make the neccesary changes to be done in order to get ready to use the project please send me the necessary changes Cordially

1 0

Hardware
by Andi Kita 26 Feb '19

26 Feb '19

Hello what kind of hardware is supported by osmo-gmr? I have an ettus b200 but when I run a script it comes back with device not compatible or smth similar to it. I have a good option to buy a usrp1 with all the doughterboards. Any help is appreciated. Thank you.

1 0

OsmoDevCon 2019 registration
by Harald Welte 31 Dec '18

31 Dec '18

Dear fellow Osmocom developers, I'm a bit surprised to notice that not more people have signed up for OsmoDevCon 2019. I guess it was mostly an oversight when the date was originally announced, and not a lack of interest? ;) All details about the event are available at the related wiki page at: https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCon2019 Please enter your name at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCon2019#Requested in case you would like to attend. Registering early allows proper planning. Thanks! Looking forward to meeting old and new Osmocom developers in April 2019. 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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