RRC_RECFG msg failure reasons

RAN
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1

Hello Experts.

Anyone can help with understanding a 5G NSA case?

  1. UE setup PSCEL/NSA @604/623,
  2. On (74), eNB asked for UE to perform RRC_RECFG, but UE fails and perform REESTAB on another cell.

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I would like to understand the RRC_RECFG msg and the failure cause.

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2

It’s mentioned there → it’s reconfiguration failure.
May be there is something in reconfiguration that UE could not handle.

3

Possibly UE does’nt support the ENDC configuration.
I mean band combo.

4

In my network, I have L18, L26, L8, L21, NR35 (TDD).

The UE should support.

5

I think if UE is not supporting then gNB will not configure anything which is not supported by UE.

6

This is the reconfiguration msg, there is no addition of band.

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7

After NSA PSCell is added, enb sends UE info to perform scell CA-Lte addition but UE fails.

Is there a switch to disable scell lte addition after nsa PSCell is added?

8

Yes, this can be done as LTE CA with 5G is a feature that can be enabled or disabled.

Parameter actCAggrLteNrDualConnectivity.