Radio (NR) channel state information (CSI) capability related signaling enhancement

1. A user equipment (UE) in wireless communication with a source device connecting to a first cell and a second cell, comprising:

radio front end circuitry; and

processor circuitry coupled to the radio front end circuitry, the processor circuitry configured to:

determine a first number of channel state information reference signal (CSI-RS) resources of a first time slot duration corresponding to the first cell;

determine a second number of CSI-RS resources of a second time slot duration corresponding to the second cell;

determine an overall time slot duration based on the first and the second time slot durations;

determine an overall number of CSI-RS resources of the overall time slot duration at least based on the first and the second number of CSI-RS resources;

generate a capability report at least based on the overall number of CSI-RS resources; and

transmit the capability report to the source device,

wherein the capability report corresponds to one or more carrier components in a single band or a single band combination of a carrier aggregation.

2. The UE of claim 1 ,

wherein the radio front end circuitry is configured to:

receive a channel state information (CSI) reporting configuration message from the first cell; and

receive a CSI-RS from the second cell;

wherein the processor circuitry is further configured to:

determine a first duration and a second duration for occupying a CSI processing unit of the UE;

process the CSI reporting configuration message to trigger a CSI-RS measurement using the CSI processing unit in the first duration;

perform the CSI-RS measurement of the CSI-RS using the CSI processing unit in the second duration;

generate a CSI report based on the CSI-RS measurement; and

transmit the CSI report to a third cell via the source device.

3. The UE of claim 1 , wherein the first time slot duration is different from the second time slot duration.

4. The UE of claim 3 , wherein the processor circuitry is further configured to:

compare the first time slot duration and the second time slot duration; and

determine that the first time slot duration is smaller than the second time slot duration.

5. The UE of claim 4 , wherein the processor circuitry is further configured to:

determine that the overall time slot duration is equal to the first time slot duration; and

determine that the overall number of CSI-RS resources of the overall time slot duration is equal to a sum of the first number of CSI-RS resources and the second number of CSI-RS resources.

6. The UE of claim 4 , wherein the processor circuitry is further configured to:

determine that the overall time slot duration is equal to the second time slot duration;

determine that the second time slot duration fully overlaps with a third number of the first time slot duration; and

determine that the overall number of CSI-RS resources of the overall time slot duration is equal to a sum of the third number times the first number of CSI-RS resources and the second number of CSI-RS resources.

7. The UE of claim 2 , wherein the processor circuitry is further configured to:

determine a third duration; and

generate the CSI report based on the CSI-RS measurement using the CSI processing unit in the third duration.

8. The UE of claim 7 , wherein the first cell is a primary cell, and wherein the second cell and the third cell are secondary cells.

9. The UE of claim 1 , wherein the one or more carrier components are in an FR1 frequency range or an FR2 frequency range.

10. The UE of claim 1 , wherein the processor circuitry is further configured to:

determine one or more supported combinations of CSI-RS measurement types;

determine one or more supported combinations of CSI report types; and

generate the capability report based on the one or more supported combinations of CSI-RS measurement types and the one or more supported combinations of CSI report types.

11. The UE of claim 1 , wherein the processor circuitry is further configured to:

determine one or more restricted combinations of CSI-RS measurement types;

determine one or more restricted combinations of CSI report types; and

generate the capability report based on the one or more restricted combinations of CSI-RS measurement types and the one or more restricted combinations of CSI report types.

12. A method performed by a user equipment (UE) in wireless communication with a source device, the method comprising:

determining a first number of channel state information reference signal (CSI-RS) resources of a first time slot duration corresponding to a first cell;

determining a second number of CSI-RS resources of a second time slot duration corresponding to a second cell;

determining an overall time slot duration based on the first and the second time slot duration;

determining an overall number of CSI-RS resources of the overall time slot duration at least based on the first and the second number of CSI-RS resources;

generating a capability report at least based on the overall number of CSI-RS resources; and

transmitting the capability report to the source device,

wherein the capability report corresponds to one or more carrier components in a single band or a single band combination of a carrier aggregation.

13. The method of claim 12 further comprising:

receiving a channel state information (CSI) reporting configuration message from the first cell;

receiving a CSI-RS from the second cell;

determining a first duration and a second duration for occupying a CSI processing unit of the UE;

processing the CSI reporting configuration message to trigger a CSI-RS measurement using the CSI processing unit in the first duration;

performing the CSI-RS measurement of the CSI-RS using the CSI processing unit in the second duration;

generating a CSI report based on the CSI-RS measurement; and

transmitting the CSI report to a third cell via the source device.

14. The method of claim 12 , wherein the first time slot duration is different from the second time slot duration.

15. The method of claim 14 further comprising:

comparing the first time slot duration and the second time slot duration; and

determining that the first time slot duration is smaller than the second time slot duration.

16. The method of claim 15 further comprising:

determining that the overall time slot duration is equal to the first time slot duration; and

determining that the overall number of CSI-RS resources of the overall time slot duration is equal to a sum of the first number of CSI-RS resources and the second number of CSI-RS resources.

17. The method of claim 15 further comprising:

determining that the overall time slot duration is equal to the second time slot duration;

determining that the second time slot duration fully overlaps with a third number of the first time slot duration; and

determining that the overall number of CSI-RS resources of the overall time slot duration is equal to a sum of the third number times the first number of CSI-RS resources and the second number of CSI-RS resources.

18. The method of claim 13 further comprising:

determine a third duration; and

generate the CSI report based on the CSI-RS measurement using the CSI processing unit in the third duration.

19. The method of claim 18 , wherein the first cell is a primary cell, and wherein the second cell and the third cell are secondary cells.

20. The method of claim 12 , wherein the one or more carrier components are in an FR1 frequency range or an FR2 frequency range.