Query - Running two ARFCN on UmTRX using OsmoBTS

Alexander Chemeris alexander.chemeris at gmail.com
Mon May 4 16:06:08 UTC 2015


Hi Amber & Sarosh,

UmTRX itself can with with both channels in different bands.

That said, this is not currently implemented in OsmoBTS/OsmoNITB - you can
see that the band is specified for a BTS as a whole. Patches to add this
feature are very welcome.

On Mon, May 4, 2015 at 1:15 AM, Amber and Sarosh <amber_sarosh at hotmail.com>
wrote:

> Hi,
> Thank you for your help Alexander.
>
> We have configured our system to use both the channels of UmTRX on
> different ARFCNs of GSM900 band with OsmoNITB, OsmoTRX and OsmoBTS.We have
> a Fairwaves UmTRX version 2.2 with us. Can you please confirm if the two
> channels of a single UmTRX can be configured to operate on two different
> bands for example one channel on GSM900 and the other one on DCS1800?
>
> Regards,
> Amber & Sarosh
>
> Regards,
> Amber & Sarosh
>
>
> ------------------------------
> From: alexander.chemeris at gmail.com
> Date: Fri, 1 May 2015 23:37:25 -0400
>
> Subject: Re: Query - Running two ARFCN on UmTRX using OsmoBTS
> To: amber_sarosh at hotmail.com
> CC: umtrx at lists.osmocom.org; andy.avtushenko at gmail.com
>
> Amber & Sarosh,
>
> We recommend using the following branches:
> osmo_trx: fairwaves/master
> libosmocore: master
> libosmo-abis: fairwaves/master
> libsmpp34: master
> osmo_bts: fairwaves/debian
> openbsc: fairwaves/master
>
> Let us know if you have any issues using them.
>
> On Tue, Apr 28, 2015 at 1:24 AM, Amber and Sarosh <
> amber_sarosh at hotmail.com> wrote:
>
>
> Hi,
> Thankyou for your response.
> For installation of osmo-bts we are following the instructions at
> http://openbsc.osmocom.org/trac/wiki/network_from_scratch . Kindly inform
> which branch should we use?
>
> Regards,
> Amber & Sarosh
>
>
> > From: alexander.chemeris at gmail.com
> > Date: Mon, 27 Apr 2015 15:25:08 -0400
> > Subject: Re: Query - Running two ARFCN on UmTRX using OsmoBTS
> > To: amber_sarosh at hotmail.com
> > CC: umtrx at lists.osmocom.org; andy.avtushenko at gmail.com
>
> >
> > Amber & Sarosh,
> >
> > It looks like you're using a wrong version of osmo-bts. Whuch branch
> > and commit are you using?
> >
> > On Mon, Apr 27, 2015 at 5:39 AM, Amber and Sarosh
> > <amber_sarosh at hotmail.com> wrote:
> > > Hi
> > > Thanks for your reply. We have tested the configurations that you
> mailed but
> > > our setup still produces the following error message when osmobts is
> run;
> > >
> > > <0006> scheduler.c:212 Init scheduler for trx=0
> > > <000a> trx_if.c:485 Open transceiver for trx=0
> > > <000a> trx_if.c:496 Waiting for transceiver send clock
> > > There is no such command.
> > > Error occurred during reading below line:
> > > rxgain 12
> > >
> > > Unknown TRX 1. Aavialable TRX are: 0..0
> > > Failed to parse the config file: '/root/.osmocom/osmo-bts.cfg'
> > >
> > > Any help in this regard is much appreciated. Thanks.
> > >
> > > Regards,
> > > Amber & Sarosh
> > >
> > >
> > > ________________________________
> > > Date: Fri, 24 Apr 2015 08:54:35 -0800
> > > Subject: Query - Running two ARFCN on UmTRX using OsmoBTS
> > > From: andy.avtushenko at gmail.com
> > > To: amber_sarosh at hotmail.com
> > > CC: fairsupport at fairwaves.co
> > >
> > >
> > > Hello Amber & Sarosh
> > > You have to add these lines below into /etc/osmocom/openbsc.cfg right
> after
> > > trx0 configuration
> > > trx 1
> > > rf_locked 0
> > > arfcn 184 (set the right ARFCN for you here )
> > > nominal power 23
> > > max_power_red 0
> > > rsl e1 tei 0
> > > timeslot 0
> > > phys_chan_config TCH/F
> > > timeslot 1
> > > phys_chan_config TCH/F
> > > timeslot 2
> > > phys_chan_config TCH/F
> > > timeslot 3
> > > phys_chan_config TCH/F
> > > timeslot 4
> > > phys_chan_config TCH/F
> > > timeslot 5
> > > phys_chan_config TCH/F
> > > timeslot 6
> > > phys_chan_config TCH/F
> > > timeslot 7
> > > phys_chan_config TCH/F
> > >
> > > And add into etc/osmocom/osmo-bts.cfg
> > >
> > > trx 1
> > > rxgain 12
> > > power 0
> > >
> > > restart services: sudo sv restart osmo-trx osmo-bts osmo-nitb
> > >
> > > Regarding trx band dividing, theoretically it might possible but we
> haven't
> > > tested that
> > > --
> > > Best regards,
> > > Andy
> >
> >
> >
> > --
> > Regards,
> > Alexander Chemeris.
> > CEO, Fairwaves, Inc.
> > https://fairwaves.co
> >
> > 
>
>
>
>
> --
> Regards,
> Alexander Chemeris.
> CEO, Fairwaves, Inc.
> https://fairwaves.co
>
> 
>



-- 
Regards,
Alexander Chemeris.
CEO, Fairwaves, Inc.
https://fairwaves.co


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