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List:       usrp-users
Subject:    [USRP-users] E310 - OpenBTS and OsmoTRX NOHANDOVER
From:       Pablo_Colodrón via USRP-users <usrp-users () lists ! ettus ! com>
Date:       2016-04-27 11:45:36
Message-ID: 5720A660.5000900 () centum-rt ! com
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Hi all,

I have succesfully compiled OpenBTS (git commit 
6f8bd144823b489f991ac3d1120ab12dcff33029) following the steps described 
in http://openbts.org/w/index.php?title=E3x0.

Device configuration consists of a USRP E310 with the following 
connections: GPS antenna connected to sync signal (GPSDO is locked), GSM 
antenna connected to TRX-A and GSM antenna+40dB attenuator connected to 
RX2A (for preventing RF overrange in RX).

Launching OsmoTRX (using -f flag) and OpenBTS, I manage to see the GSM 
network in the mobile phone. Using a GSM spectrum analyzer, I also 
checked that Tx signal has a 700Hz offset, but this enough for the 
mobile phone to see the network. However, when I try to attach the 
phone, I can only see few messages like the following:

WARNING 3042473040 22:26:06.8 Transceiver.cpp:825:driveControl: 
NOHANDOVER at timeslot 0 subslot 0
WARNING 3042473040 22:26:06.8 Transceiver.cpp:825:driveControl: 
NOHANDOVER at timeslot 0 subslot 0

Aparrently, they are RACH messages sent by the phone but not processed 
by the transceiver.

TRX-A led is red and RX2-A led is green when I launch all software. I 
used default configurations for OpenBTS, OsmoTRX and ettus E310. This is 
the output of the OsmoTRX when it starts up:

root@ettus-e300:/usr/local/bin# ./osmo-trx -f
linux; GNU C++ version 4.9.1; Boost_105600; UHD_003.008.004-0-unknown

Config Settings
    Log Level............... NOTICE
    Device args.............
    TRX Base Port........... 5700
    TRX Address............. 127.0.0.1
    Channels................ 1
    Samples-per-Symbol...... 1
    External Reference...... Disabled
    C0 Filler Table......... Dummy bursts
    Diversity............... Disabled
    Tuning offset........... 0
    RSSI to dBm offset...... 0
    Swap channels........... 0

-- Loading FPGA image: /usr/share/uhd/images/usrp_e310_fpga.bit... done
-- Detecting internal GPSDO.... found
-- Initializing core control...
-- Performing register loopback test... pass
-- Performing register loopback test... pass
-- Performing register loopback test... pass
-- Performing CODEC loopback test... pass
-- Performing CODEC loopback test... pass
-- Setting time source to internal
-- Asking for clock rate 32 MHz
-- Actually got clock rate 32 MHz
-- Performing timer loopback test... pass
-- Performing timer loopback test... pass
-- Initializing time to the internal GPSDO
-- Asking for clock rate 26 MHz
-- Actually got clock rate 26 MHz
-- Performing timer loopback test... pass
-- Performing timer loopback test... pass
-- Setting E3XX 1 SPS
-- Transceiver active with 1 channel(s)


Any help will be appreciated.

Regards,


-- 
131010-CRT-#P-Firma html-V1.00

*Pablo Colodrón*
SW Development Leader
CENTUM R&T -www.centum-rt.com <http://www.centum-rt.com/>
*//**/T /*+34 986 120 460
*/F/*+34 986 120 461*/
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    Hi all,<br>
    <br>
    I have succesfully compiled OpenBTS (git commit
    6f8bd144823b489f991ac3d1120ab12dcff33029) following the steps
    described in <a class="moz-txt-link-freetext" \
href="http://openbts.org/w/index.php?title=E3x0">http://openbts.org/w/index.php?title=E3x0</a>.<br>
  <br>
    Device configuration consists of a USRP E310 with the following
    connections: GPS antenna connected to sync signal (GPSDO is locked),
    GSM antenna connected to TRX-A and GSM antenna+40dB attenuator
    connected to RX2A (for preventing RF overrange in RX).<br>
    <br>
    Launching OsmoTRX (using -f flag) and OpenBTS, I manage to see the
    GSM network in the mobile phone. Using a GSM spectrum analyzer, I
    also checked that Tx signal has a 700Hz offset, but this enough for
    the mobile phone to see the network. However, when I try to attach
    the phone, I can only see few messages like the following:<br>
    <br>
    WARNING 3042473040 22:26:06.8 Transceiver.cpp:825:driveControl:
    NOHANDOVER at timeslot 0 subslot 0<br>
    WARNING 3042473040 22:26:06.8 Transceiver.cpp:825:driveControl:
    NOHANDOVER at timeslot 0 subslot 0<br>
    <br>
    Aparrently, they are RACH messages sent by the phone but not
    processed by the transceiver.<br>
    <br>
    TRX-A led is red and RX2-A led is green when I launch all software.
    I used default configurations for OpenBTS, OsmoTRX and ettus E310.
    This is the output of the OsmoTRX when it starts up:<br>
    <br>
    root@ettus-e300:/usr/local/bin# ./osmo-trx -f<br>
    linux; GNU C++ version 4.9.1; Boost_105600;
    UHD_003.008.004-0-unknown<br>
    <br>
    Config Settings<br>
       Log Level............... NOTICE<br>
       Device args............. <br>
       TRX Base Port........... 5700<br>
       TRX Address............. 127.0.0.1<br>
       Channels................ 1<br>
       Samples-per-Symbol...... 1<br>
       External Reference...... Disabled<br>
       C0 Filler Table......... Dummy bursts<br>
       Diversity............... Disabled<br>
       Tuning offset........... 0<br>
       RSSI to dBm offset...... 0<br>
       Swap channels........... 0<br>
    <br>
    -- Loading FPGA image: /usr/share/uhd/images/usrp_e310_fpga.bit...
    done<br>
    -- Detecting internal GPSDO.... found<br>
    -- Initializing core control...<br>
    -- Performing register loopback test... pass<br>
    -- Performing register loopback test... pass<br>
    -- Performing register loopback test... pass<br>
    -- Performing CODEC loopback test... pass<br>
    -- Performing CODEC loopback test... pass<br>
    -- Setting time source to internal<br>
    -- Asking for clock rate 32 MHz<br>
    -- Actually got clock rate 32 MHz<br>
    -- Performing timer loopback test... pass<br>
    -- Performing timer loopback test... pass<br>
    -- Initializing time to the internal GPSDO<br>
    -- Asking for clock rate 26 MHz<br>
    -- Actually got clock rate 26 MHz<br>
    -- Performing timer loopback test... pass<br>
    -- Performing timer loopback test... pass<br>
    -- Setting E3XX 1 SPS<br>
    -- Transceiver active with 1 channel(s)<br>
    <br>
    <br>
    Any help will be appreciated.<br>
    <br>
    Regards,<br>
    <br>
    <br>
    <div class="moz-signature">-- <br>
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              style="font-family:
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          </span></span><span style="font-size: 10pt; font-family:
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        <span style=""><span style="font-size: 10pt; font-family:
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            don’t print this e-mail unless you really need to!</span></span></p>
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            correo electrónico y los documentos que, en su caso, lo
            acompañan pueden contener información reservada y/o
            confidencial
            dirigida
            exclusivamente al uso del destinatario. Si Ud. no es el
            destinatario,
            le
            rogamos que nos lo notifique inmediatamente, por esta misma
            vía, no
            estando
            autorizado para su exhibición, copia ni distribución a otras
            personas o
            entidades. Si ha recibido este correo electrónico por error,
            le rogamos
            que lo
            destruya o elimine de su sistema. El correo electrónico vía
            Internet no
            permite
            asegurar ni la confidencialidad de los mensajes que se
            transmiten ni la
            correcta recepción de los mismos. En caso de que el
            destinatario de
            este
            mensaje no consienta la utilización del correo electrónico
            vía
            Internet,
            rogamos lo ponga en nuestro conocimiento de manera
            inmediata. <br>
            <br>
          </span></span><span style=""><span style="font-size: 8pt;
            color: rgb(79, 129, 189);" lang="EN-US">**************
            <br>
            The information in this e-mail and, if applicable, in any of
            the files
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            please contact
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            forthwith via e-mail. Please note that you are not
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            entity. If
            you have
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            it from your
            computer
            system. Neither confidentiality nor correct receipt of
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            e-mail
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            this message
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