Re: [Openbts-discuss] OpenBTS often can't be found

[Ralph A. S. d. <ra...@sc...>]

Can you ensure that your frequency (your ARFCN) is free in your area? And what about antennae and diplexer, what exactly are you using?

 

Ralph.

 

From: Joe M [mailto:jm...@gm...] 
Sent: Thursday, February 4, 2016 10:10 AM
To: Tom Tsou
Cc: OpenBTS Discuss
Subject: Re: [Openbts-discuss] OpenBTS often can't be found

 

Hi Tom and all,

as a mentioned sometimes my openbts is visible sometimes doesn't. sometimes it can connect.

rarely I was able to sendsms and sendsimple. so it's not so stable.

 

here's my OpenBTS outputs. as you can see I was able to connect one MS but the noise went up in few secs and I can't sendsms or sendsimple to the MS.

 

thanks for any inputs.

 

cheers

 

--------

root@usrp-e1xx:~/src/openbts/openbts/trunk/apps# ./OpenBTS

ALERT 1074962432 OpenBTS.cpp:148:main: OpenBTS starting, ver P2.8TRUNK build date Jan 13 2016

1454576443.787932 1074962432: 

 

OpenBTS

Copyright 2008, 2009, 2010, 2011 Free Software Foundation, Inc.

Copyright 2010 Kestrel Signal Processing, Inc.

Copyright 2011 Range Networks, Inc.

Release P2.8TRUNK formal build date Jan 13 2016

"OpenBTS" is a trademark of Range Networks, Inc.

 

1454576443.807860 1074962432: 

Starting the system...

linux; GNU C++ version 4.5.3 20110311 (prerelease); Boost_104500; UHD_003.004.000-unknown

 

1454576452.274627 1074962432: 

 

Welcome to OpenBTS.  Type "help" to see available commands.

 

OpenBTS> noise

noise RSSI is -57 dB wrt full scale

MS RSSI target is -50 dB wrt full scale

 

OpenBTS> rxgain

current RX gain is 46 dB

 

OpenBTS> tmsis

TMSI       IMSI            age  used

       3 530240106064850   38s   38s

 

OpenBTS>noise

noise RSSI is -67 dB wrt full scale

MS RSSI target is -50 dB wrt full scale

 

--------------

 

I believe im running on 900Mhz here's my uhd_usrp_probe http://pastebin.com/huf4qHgm

 

 

On Fri, Jan 22, 2016 at 8:21 AM, Tom Tsou <tom...@et... <mailto:tom...@et...> > wrote:

On Tue, Jan 19, 2016 at 9:24 PM, Joe M <jm...@gm... <mailto:jm...@gm...> > wrote:
> Oh I want to add also to my previous email,
> When it visible, sometimes I can connect and get the welcome sms along the
> IMSI. I can see the IMSI from OpenBTS> tmsis command. But, when I tried to
> sendsms or sendsimple the message won't get thru even thou OpenBTS didn't
> say any error or problem.

What device are you running on?

Typically if the issue is seeing the network, as opposed to attaching
to the network, then frequency offset may be suspect. The frequency
offset issue is exasperated if there are other networks around versus
operating OpenBTS in isolation.

  -TT