OpenBSC

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4317 discussions

[RFC] Patches for better channel management
by Holger Freyther 08 Apr '09

08 Apr '09

Hey Harald, I didn't know your favorite way of getting patches so for now I simply attached them to this mail. I found some time to continue with channel management and would like to get feedback if this is running into the right direction or if you have something else or other ideas. The reason to not just apply these patches are within the first patch. Currently we don't serialize the struct gsm_bts so after a restart of the bsc_hack we would have to force another location updating request... happy hacking and feedback would be welcomed z.

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Problem with installing OpenBNC on Centos 4
by Nordin 08 Apr '09

08 Apr '09

Hello guys, I'm a bit familiar with Linux, but not heavily experienced. Anyway, I tried to get OpenBNC working but unfortunately with no succes. After running the commands: aclocal autoconf automake --add-missing ./configure make I get after running "make" the following errors: libbsc.a(db.o)(.text+0x90d): In function `db_sms_mark_sent': /home/nordin/Downloads/trunk/openbsc/src/db.c:447: undefined reference to `dbi_conn_queryf' collect2: ld returned 1 exit status make[1]: *** [bsc_hack] Error 1 make[1]: Leaving directory `/home/nordin/Downloads/trunk/openbsc/src' make: *** [all-recursive] Error 1 This is the last part of the make output. Befor this I had the following error running ./configure: libc6-dev libdbi-dev libdbd-sqlite3 Comaplaining that these were missing. I installed "libdbi-dev" with yum (yum showed me: libdbi-devel.i386, so I thought it's the same) I than downloaded libdbd-sqlite3 from sourceforge (libdbi-drivers-0.8.3-1 <http://sourceforge.net/project/showfiles.php?group_id=65979&package_id=6377…>) and installed it too. Finally I downloaded libc6-dev form http://packages.debian.org/search?keywords=libc6-dev, but don't know what to do with it. Also couldn't find any usefull information on the net, except when using Debian. I use Linux distro CentOS 4.4 (server edition). Can you please help me with this? Thank you very much.

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Solved: BS-11 runs, but no Network on my Mobile
by Andreas.Eversberg 08 Apr '09

08 Apr '09

hi, everything works now, even without external (accurat) clock from telephone network. the problem was the driver for some reason. with the latest GIT commit it works every time i startup the base or the software. (until now) now comes the next part. what has to be done in order to terminate calls or make calls between mobiles? here is the exact way on how to bind (open) mISDN time slots or bchannels: the "dev" field in the sockaddr_mISDN must equal the port number. in case of ony one card installed, it must be set to 0. the "channel" fiels must equal the time slot. because the base station uses time slot 2 and 3 for traffic channels, we must set it to 2 or 3. this is done correctly in misdn.c! is there any problem with getting data from BTS? what is the current state? best regards, andreas -----Ursprüngliche Nachricht----- Von: openbsc-bounces(a)lists.gnumonks.org [mailto:openbsc-bounces@lists.gnumonks.org] Im Auftrag von Dieter Spaar Gesendet: Freitag, 3. April 2009 15:08 An: openbsc(a)lists.gnumonks.org Betreff: Re: WG: BS-11 runs, but no Network on my Mobile Hello Andreas, On Fri, 3 Apr 2009 12:27:05 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > > so, if this works, i will try to use an hfc-pci single port card > (cheap) and provide a document on how to link the E1 card to the > single port card. only two clocks are required, a frame clock and a > bit clock. with the right settings, both clocks are compatible. Great idea ! I am definitely interested in the results. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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AW: AW: AW: BS-11 runs, but no Network on my Mobile
by Andreas.Eversberg 08 Apr '09

08 Apr '09

i tried different network and country codes (other than '1'). also i tried different ARFCN, like 120 or so. also note that eary tests showed me the network "01" just once, but at this time i did not get complete provisioning of BS-11 (only 3 channels were configured). does BS-11 need to react on telephone messages in order to show the network to the phone? or does the phone just receive the BS-11 signalling information in order to display the available network? i don't know if the receiver works. also i can create BBSIG1 and PA1, but it will not be used by bsc_hack. what do i need to change in order to use the second transponder? maybe this one works. -----Ursprüngliche Nachricht----- Von: Dieter Spaar [mailto:spaar@mirider.augusta.de] Gesendet: Mittwoch, 1. April 2009 15:09 An: Andreas.Eversberg Cc: openbsc(a)lists.gnumonks.org Betreff: Re: AW: AW: BS-11 runs, but no Network on my Mobile Hello Andreas, On Wed, 1 Apr 2009 12:36:15 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > the load is correct. i get an error pop-up while starting bsc_hack. this > is because the LMT seems not to be 100% compatible with the load. with > an older load i don't get this error pop-up, but it also doesn't work. > also no alarms show on the LMT after syncing database. i will get the > exact error message this weekend. The error message that LMT is not compatible to the firmware version should be no problem, it just complains about unknown attributes. Its strange, because you already know that the transmitter is working, so I wonder why you don't receive something on the phone. Have you tried a different phone, just to be sure ? Maybe also using a different ARFCN might help. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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AW: BS-11 runs, but no Network on my Mobile
by Andreas.Eversberg 06 Apr '09

06 Apr '09

you can set the clock of BS-11 to internal oscillator. then you need to set the E1 card into clock slave. (not pcm slave) modprobe hfcmulti port=0x200 debug=0x40000 # see hfcmulti.h or http://www.linux-call-router.de/download/driver/hfc_multi-dsp-2.0.pdf and watch the system messages. you can see that the card will get the clock from the E1 interface and uses it for internal processing. if you like to get the clock from a different card that is connected to telephone network, you can connect the clocks, and the driver will automatically switch to received clock. i will see, if i can provide instructions on how to connect both clocks. also a small application must keep layer 1 and layer 2 of the isdn line up all the time. -----Ursprüngliche Nachricht----- Von: openbsc-bounces(a)lists.gnumonks.org [mailto:openbsc-bounces@lists.gnumonks.org] Im Auftrag von Dieter Spaar Gesendet: Samstag, 4. April 2009 20:00 An: openbsc(a)lists.gnumonks.org Betreff: Re: BS-11 runs, but no Network on my Mobile Hello, I did a few more tests to check the BS-11 clock accuracy. I took a phone which is registered to an official network and tried if I can see the BS-11 test network doing a manual network search. As long as the BS-11 oscillator is not locked to the E1 clock, I can reliable find the test network. After the BS-11 oscillator has locked to the E1-clock, the test network is only found every now and then. Here with my BS-11 it takes about 5 minutes till the oscillator is locked, the attribute is NM_ATT_BS11_CCLK_ACCURACY, "0" means "high accuracy" (locked), "1" means "medium accuracy" (free running), "2" most certainly "low accuracy" (not yet warmed up, I have not verified this value). Most certainly the BS-11 oscillator is better than the oscillator of the E1-card, however I don't know if the calibration is still OK on all BS-11 units. I have not yet found an easy way to measure the BS-11 clock (without opening the case), the RF signal is always modulated and I don't have the equippment to measure the frequency of the modulated and pulsed RF signal in an accurate way. So this measurement has to wait. What you can try is to disconnect the E1 line for about 30 seconds, this should be enough so that the Abis Link goes down. If you reconnect, I assume it takes a similar time to lock the oscillator like it did here. So you have a few minutes to start OpenBSC and check if you can find the test network. If this works for most units, a possible workaround is to use the RX clock for TX on the HFC-E1 card instead of its own oscillator (this way the BS-11 oscillator determines the E1 clock). I tried that here already (on Windows), and it seems to work. However I don't know if mISDN can be configured this way or if it requires a small patch. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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Re: bs11 now runs
by Dieter Spaar 06 Apr '09

06 Apr '09

Hello Andreas, On Mon, 6 Apr 2009 10:55:14 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > > finally it works. i had allot of trouble, because the BTSM was suddenly > locked. no restart, no object recreation worked. i fixed this by doing a > software download. You have LMT, right ? If this happens again, it would be interesting to know if there is some error message available. LMT has a menu command (sorry, I don't have the exact name available right now) which allows to read the errors (I think OpenBSC also receives those errors when it starts up). Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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bs11 now runs
by Andreas.Eversberg 06 Apr '09

06 Apr '09

finally it works. i had allot of trouble, because the BTSM was suddenly locked. no restart, no object recreation worked. i fixed this by doing a software download. also i updated the mISDN driver, so i don't need the patch anymore. now it works with the latest GIT commit. i connected the clock from external isdn line card to the e1 card. but i think it will also work without line clock. after call setup from my mobile, i get disconnected, because the number is not know. this is ok, but i get continuous messages about a time slot (traffic channel) that cannot be .... (next time i write down the exact message). EH09: anyone at easterhegg in hamburg this year? (www.easterhegg.de) i will bring test server and BS-11.

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Re: BS-11 runs, but no Network on my Mobile
by Dieter Spaar 04 Apr '09

04 Apr '09

Hello, I did a few more tests to check the BS-11 clock accuracy. I took a phone which is registered to an official network and tried if I can see the BS-11 test network doing a manual network search. As long as the BS-11 oscillator is not locked to the E1 clock, I can reliable find the test network. After the BS-11 oscillator has locked to the E1-clock, the test network is only found every now and then. Here with my BS-11 it takes about 5 minutes till the oscillator is locked, the attribute is NM_ATT_BS11_CCLK_ACCURACY, "0" means "high accuracy" (locked), "1" means "medium accuracy" (free running), "2" most certainly "low accuracy" (not yet warmed up, I have not verified this value). Most certainly the BS-11 oscillator is better than the oscillator of the E1-card, however I don't know if the calibration is still OK on all BS-11 units. I have not yet found an easy way to measure the BS-11 clock (without opening the case), the RF signal is always modulated and I don't have the equippment to measure the frequency of the modulated and pulsed RF signal in an accurate way. So this measurement has to wait. What you can try is to disconnect the E1 line for about 30 seconds, this should be enough so that the Abis Link goes down. If you reconnect, I assume it takes a similar time to lock the oscillator like it did here. So you have a few minutes to start OpenBSC and check if you can find the test network. If this works for most units, a possible workaround is to use the RX clock for TX on the HFC-E1 card instead of its own oscillator (this way the BS-11 oscillator determines the E1 clock). I tried that here already (on Windows), and it seems to work. However I don't know if mISDN can be configured this way or if it requires a small patch. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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Re: WG: BS-11 runs, but no Network on my Mobile
by Dieter Spaar 03 Apr '09

03 Apr '09

Hello Andreas, On Fri, 3 Apr 2009 12:27:05 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > > so, if this works, i will try to use an hfc-pci single port card (cheap) > and provide a document on how to link the E1 card to the single port > card. only two clocks are required, a frame clock and a bit clock. with > the right settings, both clocks are compatible. Great idea ! I am definitely interested in the results. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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WG: BS-11 runs, but no Network on my Mobile
by Andreas.Eversberg 03 Apr '09

03 Apr '09

i forgot in send it to the list -----Ursprüngliche Nachricht----- Von: Andreas.Eversberg Gesendet: Freitag, 3. April 2009 12:27 An: 'Dieter Spaar' Betreff: AW: BS-11 runs, but no Network on my Mobile this is an issue i understand. here is my idea on testing it: i derrive clock from my t-com isdn line. the line clock is provided by a gps receiver and transferred via telekom's access hardware to my isdn line. because i talk to it PTP, it keeps up layer1. (the line provides coninuous clock signal.) i will connect a 4 port isdn card to it, to get the clock. this card is interlinked to the E1 card, so the clock is provided to that card. by default, the hfc-e1 card will use crystal clock if card is in NT-mode and clock master. in slave configuration, the clock is provided from pcm interface. i will use an oscilloscope to verify the signal with the received clock on the 4 port isdn card and on the e1 card. line ---> card 1 ----> e1-card | +-> card 2 on my line are two card: both are 4-port isdn cards. the second card provides one clock signal to the oscilloscope, the e1 card provide the second clock signal. so i can proove if the card 1 actually synchronize to the line clock. so, if this works, i will try to use an hfc-pci single port card (cheap) and provide a document on how to link the E1 card to the single port card. only two clocks are required, a frame clock and a bit clock. with the right settings, both clocks are compatible.

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