What's the benefit of using MAC-CE based Semi-persistent CSI reporting over the DCI based semi-persistent CSI reporting?

5G NR
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1

Hello all, I’m a just new at 5G NR.

Here is my question.

What’s the benefit of using MAC CE based Semi-persistent CSI reporting on PUCCH over the DCI based semi-persistent CSI reporting on PUSCH?

The reason why I ask this question is that why don’t we just use semi-persistent CSI reporting on PUSCH? Do we really need semi-persistent CSI reporting on PUCCH which is (de)activated by MAC CE?

2

Less control overhead.

UE doesnt have to monitor PDCCH always, power sensitive UEs better.

Also better in coverage limited areas.

3

Oh, I’ve never thought that advantage of MAC CE based SP CSI reporting on PUCCH. Thanks a lot!