Re: [Openbts-discuss] Can't register MS on a fresh OpenBTS 5 install

[Thomas M. <tho...@gm...>]

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
>
>
>
>
>