DL BLER can be more then 20% with DL SINR better then 30

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1

Hi Experts.
Anyone knows in 5G NSA Lab environment how DL BLER can be more then 20% even for low DL MCS as 10 and in the same time DL SINR better then 30?

2

Any error in backhaul media?

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3

Hmm why you are suspecting on backaul?
I mean, this should be on MAC level.

4

Check UL RF condition, might be no/wrong ack/nack received in UL.

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5

If SINR is 30, then we can say RF condition is excellent.
For good performance, backhaul should be error and congestion free.

6

Yes @shamshad, but Iā€™m trying to understand the relation between high BLER on MAC layer and the errors on the backhaul which carries higher layer protocols.

7

P0 may be too low so ACK is not recieved

8

Maybe UL interference is high or UE has incompability problem with the cell configuration, it can not decode DL data then bler is high.

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9

PIM was the problem

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10

You mean PMI?

11

PIM (Passive Intermodulation)

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12

If due to PIM, I just wonder why sinr is still good > 30dB.

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