Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Arthur R. <art...@gm...>]

Hi Ralph,

That I did understand, with up to 56Mhz of simultaneous bandwidth on both
tx and rx, we can have a lot of arcfns !!
Only processing and usb limitation can occur, but that will not be an issue
with 2 - 3 Mhz of signal.

*Is there an old "proof of concept" version of osmotrx supporting this ?
and if so can we try it out ?*
I have not been coding anything for a while, but I would try to work on it
in order to get something up and running.

B200 is working perfectly now, I have done figuring out what asterisk does,
yet still working on integrating softphones and pstn lines into the mi
(especially softphones, PSTN works well).

So: new aim : 40 usable TCH/F.


Le Sat Feb 21 2015 at 08:09:08, Ralph A. Schmid, dk5ras <ra...@sc...>
a écrit :

Keep in mind that multi ARFCN does not require multiple transceivers. You
> can create different carriers within the bandwidth (sampling rate!) of a
> SDR.
>
>
>
> Ralph.
>
>
>
> *From:* Arthur Rabaté [mailto:art...@gm...]
> *Sent:* Friday, February 20, 2015 23:22
> *To:* Alexander Chemeris; Michael Iedema
> *Cc:* ope...@li...
> *Subject:* Re: [Openbts-discuss] Noob Question about multiple ARFCN
>
>
>
> Hi Alexander,
>
> About the multiple arfcns osmotrx support with UHD.
>
>
>
> So far the only thing I have seen is dual channelling with UmTRX or B210,
> but there does not seem to be any support of multiples arfcns on a single
> trx (can't put more than one trx on a B200).
>
>
>
> Is there a branch of the osmotrx-dev I have not seen ?
>
>
>
> Kind Regards,
>
>
>
> Arthur
>
>
>
> Le Thu Dec 18 2014 at 12:09:32, Alexander Chemeris <
> ale...@gm...> a écrit :
>
> For the sake of conversation, OsmoTRX does support multiple ARFCN with UHD
> and even more features are coming.
>
> Thomas Tsou should be able to comment on how to enable it in OsmoTRX.
>
> Please excuse typos. Written with a touchscreen keyboard.
>
> --
> Regards,
> Alexander Chemeris
> CEO Fairwaves, Inc.
> https://fairwaves.co
>
> On Dec 18, 2014 1:24 PM, "Michael Iedema" <michael.iedema@rangenetworks.
> com> wrote:
>
> (please always use “reply all” so the list is included)
>
> Technically, yes it is possible. There is the question of priorities,
> effort and time as with any software project. :)
>
>
>
> > On Dec 18, 2014, at 11:14 AM, Arthur Rabaté <art...@gm...>
> wrote:
> >
> > It is clearer now !
> >
> > So, this might be feasible in a future version of UHD ?
> >
> > Regards,
> >
> > Arthur
> >
> > Le Thu Dec 18 2014 at 11:10:02, Michael Iedema <
> mic...@ra...> a écrit :
> > Hi Arthur,
> >
> > Not a silly question, I’m not sure it’s explained anywhere prominently.
> >
> > The OpenCell systems have Range Networks SDRs in them. The transceiver
> software for that SDR supports multiple ARFCNs using a single physical
> radio. The transceiver software for UHD based hardware does not yet support
> multiple ARFCNs.
> >
> > Regards,
> > -Michael
> >
> > > On Dec 18, 2014, at 10:37 AM, Arthur Rabaté <art...@gm...>
> wrote:
> > >
> > > Hi,
> > >
> > > I am wondering why we can't have multiple ARFCN (contiguous or not)
> with a single TRX.
> > > OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for
> example is supported but not B200)
> > > I do not know how opencell systems works for multiple arfcns but I can
> only assume that there are multiple trx inside ?
> > >
> > > This question may have been answered before; if so, I will have poorly
> searched.
> > >
> > > Thanks !
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