UE not sending any ACK on MSG4 (RRC setup message)

Hi all 5G Experts.

With Amarisoft I have attach and all fine, but once I use real UE then I don’t see that UE send any ACK on MSG4 (RRC setup message).

I see MSG1, MSG2, MSG3 and on MSG4 UE isn’t sending ACK.

So with real uE stuck on MSG4 / MSG5.

Any idea what could be the reason?

It’s 5G SA deployment.

At UE end see if you are able to check setup - msg4 than it’s stuck on msg4.

That’s why not sending msg5.

Need to check gNB parameters for RRC setup.


But why with Amarisoft it works?

It’s a Simulator., while comercial UE has different implementation.

You need to tune RRC setup parameters.

Which UE are you using?

OnePlus Nord CE 5G.

Check UAC BARRING FACTOR. How much it is…