[srsran-users] Getting 5G SA to work with USRP

[Johannes Wegener]

Hello everyone,

I got band 2 to work with ZeroMQ at least. The problem was that the 
tutorial didn't state the dl_nr_arfcn/ssb_nr/arfcn setting of the rat.nr 
section. For example that did work with ZeroMQ:

[rat.nr]
bands = 2
nof_carriers = 1

dl_nr_arfcn = 393980
ssb_nr_arfcn = 393890

It seems the "bands" setting doesn't really have an effect. But still 
struggling to get the USRP to work.

Best regards,
Johannes

On 13.04.23 17:32, Johannes Wegener wrote:
> Hello,
>
> I'm trying to get a 5G SA network working using srsUE and srsENB (with 
> open5gs as CN). It works using ZeroMQ as described here: 
> https://docs.srsran.com/projects/4g/en/latest/app_notes/source/5g_sa_E2E/source/index.html
>
> But this also just works using the provided band/frequency settings. 
> Using something else than band 3 the UE won't connect to ENB.
>
> I my lab setup with X310 USRPs the band 3 is not usable. I have a 
> device config similar to what is described here: 
> https://docs.srsran.com/projects/4g/en/latest/app_notes/source/5g_sa_amari/source/index.html
>
> And trying other frequency settings in empty bands I'm seeing that the 
> ENB is sending but the UE cannot connect. Since other bands than 3 
> also didn't work using ZeroMQ do I need to change anything else in the 
> srsUE configuration than the band setting in the [rat.nr] section? Do 
> I need to set the ARFCN somewhere? Or is the ZeroMQ not supposed to 
> work in anything else than band 3?
>
> Best regards,
> Johannes
>
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