Re: [Openbts-discuss] My cell phone can receive 00101 base station network, but my phone unable to connect to the 00101 network.

[osese <yc...@16...>]

thanks

At 2015-02-04 22:15:39, "Andjas Wahyu Ardiansyah" <and...@gm...> wrote:


I use 10 dB rx gain as recommended in Getting Started with OpenBTS ebook.

“One main difference between the Range Networks and Ettus Research radios is in the

proper value for GSM.Radio.RxGain. Range Networks uses a much higher value for this

parameter and if it is not adjusted, the Ettus Research equipment will not work correctly.

The signal being received will overdrive the demodulator.”, page 22.

 

Indeed, using “devconfig” will not work.

However, using “rawconfig” should do the trick.

It works fine for my B210

 

Best regards,

andjas

 

From: Tom Tsou [mailto:to...@ts...]
Sent: Wednesday, February 04, 2015 12:31 PM
To: osese
Cc:ope...@li...
Subject: Re: [Openbts-discuss] My cell phone can receive 00101 base station network, but my phone unable to connect to the 00101 network.

 

There's a bug in the CLI that won't let you reduce receive gain below 25 dB. Can you try again with the mobile a further distance from the BTS?

  -TT

On Feb 3, 2015 9:26 PM, "osese" <yc...@16...> wrote:

I will use rxgain command, GS M.R adio. Rxgain = 25<br/><br/>Cell phone still can't connect to the network.<br/><br/>I start the OpenBTS and transceiver respectively<br/>I found that when the mobile phone to connect to the Internet<br/><br/>The OPenBTS will prompt:<br/><br/>OpenBTS&gt; Processing signal vector for sig 28<br/>Done processing signal vector for sig 28<br/>Rethrowing signal 28<br/>system call during CLI select loop: Interrupted system call<br/><br/>Transceiver has been prompt:<br/><br/>ALERT 29574:29599 2015-02-04T11:55:41.0 Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH input<br/>ALERT 29574:29599 2015-02-04T11:55:47.6 Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH input<br/>ALERT 29574:29599 2015-02-04T11:55:48.6 Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH input<br/>ALERT 29574:29599 2015-02-04T11:55:49.8 Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH input<br/>......<br/><br/>I use audit command, prompting from the following:<br/><br/>OpenBTS&gt; audit<br/>+---------------------------------------------------------------------+<br/>| ERROR : Invalid Values [key current-value (default)]                |<br/>|   To use the default value again, execute: rmconfig key             |<br/>+---------------------------------------------------------------------+<br/>GSM.CCCH.BS_AG_BLKS_RES "auto" ("auto")<br/>GSM.CCCH.BS_PA_MFRMS "2" ("2")<br/>GSM.CallerID.Source "auto" ("auto")<br/>SMS.MIMEType "application/vnd.3gpp.sms" ("application/vnd.3gpp.sms")<br/><br/>+---------------------------------------------------------------------+<br/>| WARNING : Site Values Which Are Still Default [key current-value]   |<br/>|   These should be set to fit your installation: config key value    |<br/>+---------------------------------------------------------------------+<br/>GSM.Identity.BSIC.BCC "2"<br/>GSM.Identity.BSIC.NCC "0"<br/>GSM.Identity.CI "10"<br/>GSM.Identity.LAC "1000"<br/>GSM.Identity.MCC "001"<br/>GSM.Identity.MNC "01"<br/><br/>Cell phone still can't connect to the network.
At 2015-02-04 02:50:30, "Tom Tsou" <to...@ts...> wrote:
>On Tue, Feb 3, 2015 at 2:58 AM, osese <yc...@16...> wrote:
>> My cell phone can receive 00101 base station network, but my phone unable to
>> connect to the 00101 network?
>>
>> Start the OpenBTS has the following tips:
>> OpenBTS> ALERT 12463:12480 2015-01-30T17:06:29.6
>> Transceiver.cpp:414:pullRadioVector:Clipping detected on RACH input
>> OpenBTS> ALERT 12463:12480 2015-01-30T17:06:30.9
>> Transceiver.cpp:414:pullRadioVector:Clipping detected on RACH input
>> OpenBTS> ALERT 12463:12480 2015-01-30T17:06:37.5
>> Transceiver.cpp:414:pullRadioVector:Clipping detected on RACH input
>
>The handset tries to access the base station - three times - but the
>uplink signal is overpowering the receiver and the access bursts are
>lost. As others have suggested, posting your setup details is helpful.
>In general, though, the receive signal is just too strong.
>
>When you see the clipping detection triggered, you can try one of the following.
>
>1. Reduce the RF receive gain through the 'rxgain' command
>2. Increase the distance between mobile and the BTS
>3. Place an attenuator(s) inline with the receive antenna
>
>  -TT