Re: [Openbts-discuss] Openbts-discuss Digest, Vol 90, Issue 14

[Varun K. <var...@ii...>]

Hi Thomas,

Even I was going through the similar problem as yours(Can't register MS on
a fresh OpenBTS 5 install).
In the trailing mail you wrote "Thanks a lot for all your helpful answers.
It's working.", but you didn't mention what was the source of your problem
and how you corrected it.

With me, the problem is that the system is very unpredictable.
For example, if I connect my mobile device to openbts network and it got
connected successfully, I'm able to do echo SMS at 411.
Now if I disconnect the mobile device, I'm not able to connect it again.
Even after restarting the whole setup.
Moreover, it's very rare that the mobile device gets connects to my openbts
network in the first place.

My setup is similar to yours, I'm also using Ubuntu 14.04 64bit, Openbts
5.0. I'm following Getting started with Openbts by Michael Ledema for
installation of Openbts and other softwares, viz. asterisk, sipauthserve
and smqueue.

** noise RSSI is -86 dB wrt full scale
** MS RSSI target is -50 dB wrt full scale
** current downlink power -10dB wrt full scale

I'm using NI USRP2922 with two tri-band antennas that are sufficient enough
for experimental purpose.


Thank you.





On Sun, Feb 14, 2016 at 10:51 PM, <
ope...@li...> wrote:

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> Today's Topics:
>
>    1. IPAWS (Neil G)
>    2. Re: Can't register MS on a fresh OpenBTS 5 install
>       (Ralph A. Schmid, dk5ras)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 14 Feb 2016 09:19:40 -0500
> From: Neil G <nag...@gm...>
> Subject: [Openbts-discuss] IPAWS
> To: ope...@li...
> Message-ID:
>         <
> CAL...@ma...>
> Content-Type: text/plain; charset=UTF-8
>
> Has anyone other than myself considered connecting their OpenBTS with
> IPAWS to receive WEA (wireless emergency alerts)? I developed a
> working CMSP Gateway that connects and receives alerts a few years
> ago, and figured that others might be interested.
>
> Neil
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 14 Feb 2016 18:21:21 +0100
> From: "Ralph A. Schmid, dk5ras" <ra...@sc...>
> Subject: Re: [Openbts-discuss] Can't register MS on a fresh OpenBTS 5
>         install
> To: "'Thomas Meghe'" <tho...@gm...>,  "'Neel Pandeya'"
>         <nee...@et...>
> Cc: 'OpenBTS Discuss' <ope...@li...>
> Message-ID: <001801d1674c$2177cd90$646768b0$@schmid.xxx>
> Content-Type: text/plain; charset="utf-8"
>
> Funny, I even did not remember :)
>
>
>
> Ralph.
>
>
>
> From: Thomas Meghe [mailto:tho...@gm...]
> Sent: Friday, February 12, 2016 13:06
> To: Neel Pandeya
> Cc: Ralph A. Schmid, dk5ras; OpenBTS Discuss
> Subject: Re: [Openbts-discuss] Can't register MS on a fresh OpenBTS 5
> install
>
>
>
> Thanks a lot for all your helpful answers. It's working. For your
> information, current config is UHD v3.7.3 & OpenBTS v5 with a B200 rev 4
> under Ubuntu 14.04 LTS.
>
>
>
> @Ralph the problem is now with Asterisk and libsqlite3odbc.so file not
> found, I saw you faced the same problem and tried your solution mentionned
> in this thread
> https://sourceforge.net/p/openbts/mailman/openbts-discuss/thread/000001cfd5b9$95352d70$bf9f8850$@schmid.xxx/
> but it still doesn't find the file.
>
>
>
> Best regards,
>
> Thomas
>
>
>
> 2016-02-11 15:55 GMT+01:00 Neel Pandeya <nee...@et...>:
>
> The new B200 Rev 5 boards (green boards) which use the AD9364 transceiver
> chip require at least UHD 3.8.4, so you should be fine with 3.9.1 or 3.9.2.
>
> I would suggest using a tagged release, such 3.9.1 or 3.9.2, rather than
> using the master branch.
>
> You could use the Live SDR Environment from GNU Radio (see link below) to
> boot from USB drive into a Linux environment with UHD and GR pre-installed,
> and run some tests using "uhd_fft" and Gqrx to verify that your hardware is
> working correctly and that your system can communicate with it.
>
> https://gnuradio.org/redmine/projects/gnuradio/wiki/GNURadioLiveDVD
>
>
>
> --Neel
>
>
>
> On 11 February 2016 at 05:55, Ralph A. Schmid, dk5ras <ra...@sc...>
> wrote:
>
> Maybe the latest revision of the B200 is the problem? I heard that they
> changed something...perhaps this somehow breaks OpenBTS?!
>
>
>
> Ralph.
>
>
>
>
>
> From: Thomas Meghe [mailto:tho...@gm...]
> Sent: Wednesday, February 10, 2016 9:01 PM
> To: Ralph A. Schmid, dk5ras
> Cc: ope...@li...
> Subject: Re: [Openbts-discuss] Can't register MS on a fresh OpenBTS 5
> install
>
>
>
> Thanks for the hint. However, I tried with an older version of UHD driver
> ( UHD_003.010.git-119-g42a3eeb6 and FW Version 8.0 / FPGA Version 14.0)
> with OpenBTS5 and it still doesn't work... I will try with the 3.9.1 which
> seems to work for some users right ?
>
> Thanks again,
>
> Thomas
>
>
>
> 2016-02-10 8:34 GMT+01:00 Ralph A. Schmid, dk5ras <ra...@sc...>:
>
> Then it is some issue earlier in the chain, not an
> authentication/registration problem. I had this when the new UHD with
> different group delay came, and it worked again when openbts got patched
> respectively. For some reason your setup even does not properly decode the
> access bursts.
>
>
>
> Ralph.
>
>
>
> From: Thomas Meghe [mailto:tho...@gm...]
> Sent: Tuesday, February 9, 2016 6:53 PM
> To: Ralph A. Schmid, dk5ras
> Cc: ope...@li...
> Subject: Re: [Openbts-discuss] Can't register MS on a fresh OpenBTS 5
> install
>
>
>
> Apologies for this second email but, I managed to catch access burst on
> uplink frequency (cf https://framapic.org/IL7FgT9V35di/YrzHY5d4014s.png)
> but there is only one or two packet sent.
>
>
>
> 2016-02-09 18:44 GMT+01:00 Thomas Meghe <tho...@gm...>:
>
> Hi Ralph,
>
> Thanks for your answer. rxgain was set to 10 (accordingly to the doc
> regarding USRP hardware), I tried to set it to 0 which is 10db below.
> Nothing is different.
>
>
>
> I also tried without the antenna plugged and it still doesn't work. I
> didn't manage to find some crappy speakers at home, I will try elsewhere.
> However, I can clearly see the downlink of the BTS corresponding to the
> ARFCN 80 (which is 951mhz cf
> https://framapic.org/zBlgtJB20AfI/EuZAcpYj0duQ.png) but nothing on the
> uplink (906mhz) when trying to register MS.
>
>
>
> Regards.
>
>
>
> 2016-02-09 14:35 GMT+01:00 Ralph A. Schmid, dk5ras <ra...@sc...>:
>
> What is your rx gain setting? Try using 10 or 20 dB below the preset. Also
> try disconnecting your RX antenna when you are very close to the B200
> during the tests. Sometimes the access bursts simply are not decoded
> because the signal is too strong.
>
>
>
> Can you monitor what the handheld transmits when trying to register? Only
> access bursts, or a complete SDDCH exchange? You can get an idea if you put
> the phone on EMI sensitive PC speakers or a cheap radio clock, to hear the
> annoying GSM noise when it transmits. Access bursts are very short, barely
> noticeable clicks, only two or three of them in a row, while an established
> SDDCH produces the typical machinegun / drum machine "tack tackatack
> tackatack" sound, like when receiving a short message in a commercial
> network.
>
>
>
> Ralph.
>
>
>
> From: Thomas Meghe [mailto:tho...@gm...]
> Sent: Tuesday, February 9, 2016 12:33 PM
> To: ope...@li...
> Subject: [Openbts-discuss] Can't register MS on a fresh OpenBTS 5 install
>
>
>
> Hello,
>
> I'm currently trying to setup a working OpenBTS 5 testing setup (for
> testing purposes) on a Ubuntu 14.04 64 bit with a B200. What I've done so
> far :
>
> *       Setup OpenBTS 5 following the guide "Getting started with OpenBTS
> guide"
> *       Everything seems to be functionnal (no compile error, no running
> error, radio com with my B200 operational)
> *       Kept MCC and MNC to testing default values (001 01)
> *       Control.LUR.OpenRegistration set to *.
> *       Control.LUR.SendTMSIs set to 1
> *       sipauthserve running
> *       noise RSSI is -79 dB wrt full scale
> *       power downlink is set to -10db
> *       ARFCN is set to 80 (checked before with OsmocomBB scan that the
> associated frequency was not noisy, I can see from my osmophone a nice and
> clear peak)
>
> I think I didn't missed anything for the crash-test but... I tried to
> connect on 3 different phones with 3 different simcards (My current one on
> my Android phone, an old one and a foreign one). All my 3 phones can see
> the network but no one is able to connect to. The connection process is
> long and fall short to a "not available" or something else.
>
> I'm using my B200 with two Vert 400 antennas (it shall be enough to cover
> the living room area)
>
> Thanks for any help and regards,
>
> Tom
>
>
>
>
>
>
>
>
>
>
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-- 
Varun Kumar
B Tech ECE 3rd year
Roll No. 2013169
Student Council 2015-16 | Web Admin | ECE'13 Representative
<http://home.iiitd.edu.in/~varun13169/>http://home.iiitd.edu.in/~varun13169/