What is the minimum value of csi-rs resources per resource set the UE can support?

Specs & Protocol Testing
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1

Hi Experts.

What is the minimum value of csi-rs resources per resource set the UE can support?

In some of UEs capability I see always is 4.

Any restriction spec defined on UE side on the minimum csi rs resource that can support?

2

This is at ENB antenna ports

Port -0 /1-8 Port 2/3-4

3

The minimum value of CSI-RS resources per resource set that the UE can support depends on the frequency range of the operating band.
For Frequency Range 1, the UE must support at least 8 CSI-RS resources per resource set.
For Frequency Range 2, the UE must support at least 16 CSI-RS resources per resource set.