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...>]

noise RSSI is -65 dB wrt full scale

At 2015-02-04 16:56:38, "Arthur Rabaté" <art...@gm...> wrote:
No, the situation is clearly due to the radio part.
Clipping should not occur. Just unplug the tx antenna and give it a try.
Also can you check for noise ?




Le Wed Feb 04 2015 at 09:38:41, osese <yc...@16...> a écrit :
My situation related to mobile phone SIM card?
I need some special SIM card?

At 2015-02-04 13:30:36, "Tom Tsou" <to...@ts...> wrote:


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



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