- baseband-devel - lists.osmocom.org

burst_ind branch
by g.roelant＠telenet.be 15 Dec '12

15 Dec '12

Please correct me if i'm wrong: i'm writing a small c program to process to burst files. run ccch_scan and follow the frames in wireshark. if you see an "inrtresting" frame, note his number get the correct frame out of the burst file and display its bit stream. than this bitstream can be further used for processing add a certain offset to the framecounter and get that frame out of the burst file and display its bit stream. the rest.... i still have to figure that out... can anyone confirm i am doing the write thing? thanks

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Questions about filter replacement and fbsb_req
by Pe 14 Dec '12

14 Dec '12

Hi list! I'm playing with ccch_scan from burst_ind branch. I have some troubles with going SDCCH - FCCH\SCH - TCH After receiving "assignment command" i call fbsb_req to L1 for waiting FCCH\SCH sync bursts. When fbsb_resp is coming, i call dm_est_req_h1 with channel and hopping params. But SNR of incoming tch bursts is less then 10 most of time. What did i wrong? Is it needs to synchronize only timers by SCH without FCCH freq sync? And why we lose sync when goes from SDCCH to TCH? And a question about filter replacement. After filter change on baluns i see -128 dBm on all ARFCNs when mobile app from master branch is started. After that i tried to connect balanced line to the former filter pad and unbalanced line to the ground via cap(on the EGSM channel), as Sylvain wrote. But it didnt help. Photo after filter rework on C115: http://s9.postimage.org/r50qtx73z/lastrep.jpg As i understand, the input tract with 2 caps, 2 inductors and band-pass filter just needs for image frequency disabling? -- View this message in context: http://baseband-devel.722152.n3.nabble.com/Questions-about-filter-replaceme… Sent from the baseband-devel mailing list archive at Nabble.com.

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Re: imm ass packages
by g.roelant＠telenet.be 14 Dec '12

14 Dec '12

sorry, i made a type in wireshark i see 31 06 3f in documentation is see 2d 06 3f now you tell me that only the 3f is responsible for detecting a imm ass packet. if i wanted to detect (grep) for imm ass., shall i look for 31 06 3f or 2d 06 3f? ----- Oorspronkelijk e-mail ----- Van: "oxccoxcc oxccoxcc" <oxccoxcc(a)yandex.ru> Aan: "g roelant" <g.roelant(a)telenet.be>, "osmocomBB" <baseband-devel(a)lists.osmocom.org> Verzonden: Vrijdag 14 december 2012 16:03:34 Onderwerp: Re: imm ass packages wireshark processing of imm ass packets seems normally. Looks like a bug with partial release complete messages. But wireshark has a signature for it: http://anonsvn.wireshark.org/wireshark/trunk/epan/dissectors/packet-gsm_a_r… Try to write in the wireshark forum. 14.12.2012, 14:22, "g.roelant(a)telenet.be" <g.roelant(a)telenet.be>: > In wireshark i see immediate assignment packages... > they are like 31 06 0f > but in the documentation they are like 2d 06 3f > what am i doing wrong? > i'm listening to a belgium operator called proximus. > kind regards

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stupid question
by g.roelant＠telenet.be 14 Dec '12

14 Dec '12

Are the bursts captured with ccch_scan in burst_ind branch the same as the bursts captured with usrp2? do they result in the same file? i guess not... kind regards

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imm ass packages
by g.roelant＠telenet.be 14 Dec '12

14 Dec '12

In wireshark i see immediate assignment packages... they are like 31 06 0f but in the documentation they are like 2d 06 3f what am i doing wrong? i'm listening to a belgium operator called proximus. kind regards

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bursts dat files
by g.roelant＠telenet.be 10 Dec '12

10 Dec '12

Hi, I'm using the sylvain/burst_ind branch and ccch_scan. this produces bursts files. with which application can i view them? what is the format of these dat files? i cannot open them with wireshark... any hints? kind regards

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another newbie question
by g.roelant＠telenet.be 10 Dec '12

10 Dec '12

I want to try to alter the mobile app (in gsm48_rr.c) to listen to all tmsi's. i changed the code and altered all if statements where in the else part was the log 'Not for us' i'm hoping the phone will start following the conversation with the immediate assignment packages... this way i can start logging the beginning of the encryption.... am i doing stupid things? or is there already an app that does this? thanks

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AW: Re: AW: Re: beginners question
by Denis Simonet 08 Dec '12

08 Dec '12

For example. (reply-to doesn't seem to be set correctly in the list, btw?) Von Samsung Mobile gesendetg.roelant(a)telenet.be hat geschrieben:and than write the file with wireshark? i'm already using the mobile app with succes. Van: "Denis Simonet" <denis.simonet(a)bluewin.ch> Aan: "g roelant" <g.roelant(a)telenet.be> Verzonden: Zaterdag 8 december 2012 18:26:19 Onderwerp: AW: Re: beginners question You probably want to use the -i switch with a layer23 app and capture gsmtap with Wireshark. Best regards Denis Von Samsung Mobile gesendet g.roelant(a)telenet.be hat geschrieben: I want to write the raw data to a file. is that possible with a command? tune the gsm to a channel (for inst. 67) and capture all raw data into a file. ----- Oorspronkelijk e-mail ----- Van: "Alexander Huemer" <alexander.huemer(a)xx.vu> Aan: baseband-devel(a)lists.osmocom.org Verzonden: Vrijdag 7 december 2012 22:54:46 Onderwerp: Re: beginners question Hi g, On Fri, Dec 07, 2012 at 10:09:06PM +0100, g.roelant(a)telenet.be wrote: > How can i write the burst frames? Your question is very unspecific and therefore unlikely to be answered. You may want to rethink what exactly you want to know. Then, rephrase your question. Kind regards, -Alexander Huemer

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beginners question
by g.roelant＠telenet.be 08 Dec '12

08 Dec '12

Hi, How can i write the burst frames? thanks

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[PATCH] Add a5/3 support.
by ☎ 08 Dec '12

08 Dec '12

Hello. Attached patch will bring a5/3 support to osmo_a5. The implementatin is done based on spec, results are compared to reference implementation from standard and test vectors. Unfortunately there are several deficiencies: - it doesn't work with real phonein test network yet - no tests included - code is probably suboptimal here and there Anyway I would love to read your comments. It would be especially great if someone will manage to test it against real phones in actual network. -- best regards, Max, http://fairwaves.ru

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