Can an UE get detached or throw RLF because of high UL power transmission?

Specs & Protocol Testing
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1

Hi Experts.

Can an UE get detached or throw RLF because of high UL power transmission?

What happens if gNB receives more than expected power from a UE?

2

Yes, it can, with cause rlcunrecoverableerror or maxrlcretransmissions.

What do you mean here?

Power in Uplink is regulated by alpha and P0onominal 2 values.

3

Let’s say I fix P0 nominal and I disable power control.

4

UE will keep sending PHR reports in Uplink.

So gNnodeB will know if it can be scheduled with more data or with less data.

In Uplink I mean.

5

So there is no way UE can transmit more power than gNB’s expectations?

Or I can’t force UE to do that as well?

6

In fractional power control in Uplink target SINR is not fixed.

7

As per my understanding you can’t.

There are two factors in uplink power control:

  1. Open loop (Calculated based on comparing Target SNR and SNR received by L1 at the gNB side) → You can’t disabled this.
  2. Closed loop (TPC based) → you can disabled this.

So the overall result is 1+2 so even if you disabled TPC based power control, open loop will control everything and it will not reach beyond expected power.

8

I agree!

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9

In open loop case, UE power can be more than gNB expectations, in which case UE will be told to reduce power.

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