When UE sends PUCCH hows does gNB knows this is addressed to it?

Specs & Protocol Testing
1

Hi Experts.

When UE sends PUCCH hows does gNB knows this is addressed to it?

And not to another gNB?

Or yet any other Uplink Transmission?

How does gNB differentiate it from other UL intereference?

2

gNB gives instruction to PHY to decode the PUCCH with resources information.

If PHY able to decode anything or see some energy above a particular threshold then assume intended to this gNB.

Normally it is based on received SINR.

3

Thank you!

Does CRC check differentiate interference from desired signal?

Not sure how CRC comes into play…

4

No, it’s PHY behaviour, based on SINR value, PHY detect as ACK/NACK or DTX.