GPRS, EDGE support

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Sipos Csaba dchardware at gmail.com
Fri Jan 24 09:59:51 UTC 2014


Hi Holger,

> Nobody to command you. Naturally we do the development on the sysmoBTS
> and when you have a look at the osmo-pcu git repository you see which
> entity is the most active one. ;)

I want to be commanded :-) or at least guided towards the best
possible choice.

I need to choose a device for educational purposes, that is capable
for packet data with OpenBSC/OpenBTS. This will going to extend our
current 2G setup which currently has 3 Nokia Site family units with
OpenBSC.

So lets see if I get this correctly:

For GPRS/EDGE to work I need to choose from the following HW:

- USRP2 (I also heard that USRP1 has timing problems, but as I know,
these problems are fixed in USRP2 and the networked series?)

- UmTRX

- BladeRF (according to them, they are quite close to running OpenBTS)

- SysmoBTS

- NanoBTS

Correct?

I am more convinced to buy an SDR like device, because we can use that
for other stuff too. But if you are telling me, that for example
SysmoBTS or NanoBTS runs the GRPS stack better, compared to UmTRX or
USRP2, than I can respect that.

I also want to ask one more time, if it is possible to run multiple
TRXes on one SDR like device which has enough processing power and
bandwidth? Did someone already tried this? Or it is not even possible?

Anyway, I thought that the GPRS support is part of the OpenBTS
development, and any hardware that can run OpenBTS is also capable of
doing GPRS, but it is clear, that there are differences in the level
of support, even between SDR like devices.

I still think that it would be nice, to clarify all this packet data
related stuff on the site.

BR,Csaba








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