baseband-devel January 2013

baseband-devel@lists.osmocom.org

40 participants
71 discussions

Some beginner questions and comments
by Klaus Darilion 25 Jan '13

25 Jan '13

Hi! First I do not know if this is the proper mailing lists, as I am not a developer but a user. But I couldn't find a user list. So please advice if there is a better list. I started playing with Osmocom and my "brand new" C118 :-) and meanwhile I made my first open source GSM phone call. Following is my list of questions and suggestions I experienced so far: - Build System: since the "Use the system wide libosmocore for host applications" commit it is required that libosmocore is built separately. But the documentation is still confusing. Thus I think it would be good to: - remove the libosmocore subtree git from osmocom-bb git - remove this line of text from http://bb.osmocom.org/trac/wiki/libosmocore: "When you download and build OsmocomBB, then libosmocore is automatically part of the package, no special action is required." - osmocom: some wiki pages refer to an "osmocom" application. Is there an osmocom binary? (I think most times it is a typo for osmocon) - I use Wireshark to capture the GSMTAP packets of "monitor". How do I find out in the Wireshark trace if a message is sent from the MS or is received by the MS? - I want to study the high layer messages (e.g. not cell selection but call setup, registering to the network) but I am lost in the debug flags: DCS:DNB:DPLMN:DRR:DMM:DSIM:DCC:DMNCC:DSS:DLSMS:DPAG:DSUM. Which ones are needed in my case? Is there somewhere a description of the flags? - Some tools (e.g. cell_log) give 'SAP' log messages, e.g: Failed to connect to '/tmp/osmocom_sap'. Failed during sap_open(), no SIM reader I suspect this is for communcation with SIM cards. How it is supposed to work? - Is this 'SAP' stuff only needed/useful for softSIMs? - Which application should create the /tmp/osmocom_sap socket? (osmocon only creates /tmp/osmocom_l2 and /tmp/osmocom_loader) - Would it be possible to remove the SIM card from my C118 and put it in an external SIM reader, and then let "mobile" use the SIM card in the external reader instead? Thanks Klaus PS: I'm willing to improve the documentation in the wiki with your answers ;-)

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Need instructions
by Akib Sayyed 23 Jan '13

23 Jan '13

Dear All I need instructions for flashing c155 with custom firmware. also i need to build linker script too.what all changes need to be done in flash.lds for e88 hw. will changes in only address and size part will work ?? can any one help me ?? -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

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slow osmocom website
by Klaus Darilion 23 Jan '13

23 Jan '13

Hi! The last days I experienced the website is sometimes very slow. Requests takes up to 30 seconds to be answered by the server. http://bb.osmocom.org/ is fast, but http://bb.osmocom.org/trac/ is slow. Thus I suspect a Trac or database problem. regards Klaus

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strange crashes in current main branch
by Tim Ehlers 22 Jan '13

22 Jan '13

Hi, I already mentioned a strange behavior, sometimes when running osmocom for a few days. I think this is a different issue, because it happens more frequently and the situation is a bit different. This problem does not occur with a binary from june 2012. So it has to be some change between june and now. But now the problem: When running a phone with the main branch (only tested), it sometime come to the situation that the phone says "connection pending" and is not reacting anymore. osmocon only logs periodically this line: TOA AVG is not 16 qbits, correcting (got 15) And mobile says: <0003> gsm322.c:474 Sync to ARFCN=694(DCS) rxlev=-80 (No sysinfo yet, ccch mode NONE) <000e> gsm48_mm.c:353 Periodic location update <0005> gsm48_mm.c:355 timer T3212 (periodic loc. upd. delay) has fired <0005> gsm48_mm.c:4338 (ms 1) Received 'MM_EVENT_TIMEOUT_T3212' event in state MM IDLE, normal service <000e> gsm48_mm.c:2222 Perform location update (MCC 262, MNC 07 LAC 0x27e9) <0005> gsm48_mm.c:2356 LOCATION UPDATING REQUEST <0005> gsm48_mm.c:2378 using LAI (mcc 262 mnc 07 lac 0x27e9) <0005> gsm48_mm.c:2386 using TMSI 0xXXXXXXXX <0005> gsm48_mm.c:917 new state MM IDLE, normal service -> wait for RR connection (location updating) <0001> gsm48_rr.c:5575 (ms 1) Message 'RR_EST_REQ' received in state idle (sapi 0) <000e> gsm48_rr.c:1352 Establish radio link due to mobility management request <0003> gsm322.c:4049 (ms 1) Event 'EVENT_LEAVE_IDLE' for Cell selection in state 'C3 camped normally' <0003> gsm322.c:829 new state 'C3 camped normally' -> 'connected mode 1' <0003> gsm322.c:3665 Going to camping (normal) ARFCN 664(DCS). <0003> gsm322.c:452 Sync to ARFCN=664(DCS), but there is a sync already pending <0001> gsm48_rr.c:355 new state idle -> connection pending <0001> gsm48_rr.c:1504 CHANNEL REQUEST: 00 (Location Update no NECI) Mobile says nothing when shutting the phone off or on: OsmocomBB(ms)#shutdown OsmocomBB(ms)# OsmocomBB(ms)#no shutdown OsmocomBB(ms)# Only logs: <0005> gsm48_mm.c:4342 (ms 1) Received 'MM_EVENT_IMSI_DETACH' event in state wait for RR connection (location updating) <0005> gsm48_mm.c:1992 IMSI detach delayed. Killing and restarting mobile leads to: eeepc:~ # mobile -i 127.0.0.1 Copyright (C) 2008-2010 ... Contributions by ... License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. <000f> sim.c:1223 init SIM client <0006> gsm48_cc.c:63 init Call Control <0007> gsm480_ss.c:231 init SS <0017> gsm411_sms.c:63 init SMS <0001> gsm48_rr.c:5626 init Radio Ressource process <0005> gsm48_mm.c:1327 init Mobility Management process <0005> gsm48_mm.c:1040 Selecting PLMN SEARCH state, because no SIM. <0002> gsm322.c:5037 init PLMN process <0003> gsm322.c:5038 init Cell Selection process <0003> gsm322.c:5095 Read stored BA list (mcc=262 mnc=01 Germany, T-Mobile) <0003> gsm322.c:5095 Read stored BA list (mcc=262 mnc=07 Germany, O2) Mobile '1' initialized, please start phone now! VTY available on port 4247. And layer1 still logs some: TOA AVG is not 16 qbits, correcting (got 15) TOA AVG is not 16 qbits, correcting (got 15) TOA AVG is not 16 qbits, correcting (got 15) Has anybody a clue how this could happen from time to time? Cheers Tim

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What's the difference between the hello_world.e88flash.bin and hello_world.compalram.bin
by qiuhan1989 22 Jan '13

22 Jan '13

As said in the topic, I don't know what is the difference between the two .bin file. And when I try the osmocon app, only the hello_world.compalram.bin works, why? Thanks in advance. -- View this message in context: http://baseband-devel.722152.n3.nabble.com/What-s-the-difference-between-th… Sent from the baseband-devel mailing list archive at Nabble.com.

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sylvain/testing: apps/trx/trx.c: inttypes.h:No such file or directory
by Erich Dachleger 21 Jan '13

21 Jan '13

Hi list, Yesterday when I tried to to make a new build of sylvain/testing I encountered following errors when running make(and also when running make HOST_layer23_CONFARGS=--enable-transceiver): -------------------------------------- make -C target/firmware CROSS_COMPILE=arm-elf- make[1]: Entering directory `/root/osmocom-bb/src/target/firmware' apps/trx/trx.c:22:22: inttypes.h: No such file or directory make[1]: Leaving directory `/root/osmocom-bb/src/target/firmware' make[1]: Entering directory `/root/osmocom-bb/src/target/firmware' apps/trx/trx.c:22:22: inttypes.h: No such file or directory make[1]: *** No rule to make target `apps/trx/trx.p', needed by `all'. Stop. make[1]: Leaving directory `/root/osmocom-bb/src/target/firmware' make: *** [firmware] Error 2 ------------------------------------------- Master branch builds fine on backtrack 5 r2 and so did also Sylvain/testing earlier. Searching mailing-list gives some info that removing inttypes.h can be done as that "is taken care of by upstrean libosmocore".However I have read that inntypes.h should exist. I tested and removed inttypes.h in trx/trx.c. Recompiling gives an error message about parse error before debug-message PRIu32 on line 69 in trx/trx.c. Commenting out that line makes it build, but as info obtained earlier I now guess I have also removed some key-functionality and my approach is wrong? Further searching gave some unclear/vague(mostly for other situations) hints that the line #include <inttypes.h> could be replaced by: #ifdef HAVE_STDINT_H #include <stdint.h> #else #include <include <inttypes.h> #endif I tested replacing #include <inttypes.h> by the abovein trx.c also but it didn't work. Any ideas or hints what migh be wrong? Enclosed is the full build-error-log from running without making any changes to inttypes.h. Regards erich

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Jan 23, 8pm / Osmocom Berlin User Group meeting
by Harald Welte 21 Jan '13

21 Jan '13

Hi all! This is the announcement for the latest incarnation of our bi-weekly Osmocom Berlin meeting. January 23, 8pm @ CCC Berlin, Marienstr. 11, 10113 Berlin There is no formal presentation scheduled for this meeting. However, we'll have a progress report + demonstration of current osmo-pcu. If you are interested to show up, feel free to do so. The meeting is free as in "free beer", despite no actual free beer being around ;) 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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gsm450 in belgium
by g.roelant＠telenet.be 21 Jan '13

21 Jan '13

Hi, Does anyone know if gsm450 is encrypted with A5/1? and who is using gsm450 in belgium I can see signals on my ettus + external ant. there... kind regards

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Filter Modification
by Akib Sayyed 19 Jan '13

19 Jan '13

Dear List I tried to modify filter of osmocom c118 but i found that its not getting signals. loosing all signalls and showing all on 115dbm to 120dbm. what could have gone wrong ?? -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

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tranceiver support for osmo-bts
by Andreas Eversberg 19 Jan '13

19 Jan '13

hi, i would like to start implementing the trx manager interface support to osmo-bts. before going to work, i'm writing this mail, because i like to read some pros and cons for my approach. as already stated, thomas a. cooper already implemented an interface between sysmo-bts's dsp device and trx manager interface by using code from openbts, running in an own process [1]. i would like to follow a different approach by writing a scheduler and adding the udp interface for the trx(s). some benefits are in my oppinion: - not having an extra process running with additional latency and overhead - smaller code, because only a small multiframe scheduler + udp interface for the trx is required (coding scheme and forward error correction code can be used from libosmocore.) - no running after dsp's api changes, (caused by newer firmware of sysmobts) - trx specific features and limitations can be considered. (vty options for setting special features, limitations can affect oml ack/nack responses to be considered by bsc) - no use of multithreading, use of talloc. the code is easier to debug and so becomes more stable. - easy to add initial support for BCCH(+SDCCH4), SDCCH8, TCH/F, TCH/H, PDCH (gprs) for a whide range of applications. comments are welcome. regards, andreas [1] http://scholar.lib.vt.edu/theses/available/etd-05082012-141540/unrestricted…

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baseband-devel January 2013