[Openbts-discuss] Any plan to fork OpenBTS and/or merge with Osmocom code?

Alexander Chemeris alexander.chemeris at gmail.com
Mon Apr 11 09:00:00 UTC 2011


Hi Harald,

On Sun, Apr 10, 2011 at 18:52, Harald Welte <laforge at gnumonks.org> wrote:
> Hi Alexander,
>
> On Sun, Apr 10, 2011 at 05:40:42PM +0400, Alexander Chemeris wrote:
>
>> On Sun, Apr 10, 2011 at 12:35, Harald Welte <laforge at gnumonks.org> wrote:
>> > If you use the USRP hardware (or any other SDR hardware), you cannot use
>> > GPRS/EDGE whether you use Osmocom + OpenBTS or OpenBTS standalone.
>>
>> Why do you think that USRP can't support GPRS/EDGE? Is it because of
>> USB latency?
>
> no, that's not the point.  The point is that you need to implement the CCU
> and PCU, both of which are not present in OpenBTS.
>
> So whether or not you combine OpenBTS with OpenBSC or run OpenBSC stand-alone,
> it will always have the same features regarding GPRS (or not).

Ok, I see your point now.
You used words "USRP and other SDR hardware" here and that's what
confused me, because hardware can support this feature. It's OpenBTS
software limitation, not hardware limitation.

>> And definitely there are SDR hardware which support GPRS/EDGE - it's
>> just more advanced and more integrated then USRP.
>>
>> > Multi-ARFCN: This is an aspect of the radio-modem.  So again, on the same
>> > hardware any OpenBTS/OpenBSC integration will not change this.
>>
>> Technically, USRP can support multi-ARFCN, but open-source version of
>> OpenBTS doesn't.
>
> yes. But whether or not you combine OpenBTS with OpenBSC or run OpenBSC
> stand-alone, it will always have the same features regarding multi-arfcn

Same here.

Thanks for clarification.

-- 
Regards,
Alexander Chemeris.
http://www.fairwaves.ru




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