Method and apparatus for determining PDCCH monitoring capability in mobile communications

1. A method, comprising:

transmitting, by a processor of an apparatus, a capability report to indicate a first physical downlink control channel (PDCCH) monitoring capability and a second PDCCH monitoring capability;

receiving, by the processor, a configuration configuring a first set of cells using the first PDCCH monitoring capability and a second set of cells using the second PDCCH monitoring capability;

determining, by the processor, a first monitoring budget corresponding to the first set of cells based on the first PDCCH monitoring capability and a second monitoring budget corresponding to the second set of cells based on the second PDCCH monitoring capability; and

performing, by the processor, a PDCCH monitoring according to the first monitoring budget and the second monitoring budget,

wherein the determining comprises determining the second monitoring budget corresponding to the second set of cells based on:

a first formula in an event that spans on the second set of cells are aligned; or

a second formula in an event that spans on the second set of cells are not aligned.

2. The method of claim 1 , wherein the first PDCCH monitoring capability comprises a slot-based PDCCH monitoring capability, and wherein the second PDCCH monitoring capability comprises a span-based PDCCH monitoring capability.

3. The method of claim 1 , wherein the configuration comprises a first number of cells or component carriers (CCs) using the first PDCCH monitoring capability and a second number of cells or CCs using the second PDCCH monitoring capability.

4. The method of claim 1 , wherein the first monitoring budget comprises a first control channel element (CCE) or blind decoding (BD) budget, and wherein the second monitoring budget comprises a second CCE or BD budget.

5. The method of claim 1 , wherein the capability report comprises a plurality of combinations of the first PDCCH monitoring capability and the second PDCCH monitoring capability.

6. The method of claim 1 , wherein the determining comprises determining the first monitoring budget by replacing a PDCCH blind decoding capability with a Release-15 PDCCH blind decoding capability.

7. The method of claim 1 , wherein the determining comprises determining the second monitoring budget by replacing a PDCCH blind decoding capability with a Release-16 PDCCH blind decoding capability.

8. The method of claim 3 , further comprising:

splitting, by the processor, the first monitoring budget between the first number of cells or CCs using the first PDCCH monitoring capability; and

splitting, by the processor, the second monitoring budget between the second number of cells or CCs using the first PDCCH monitoring capability.

9. An apparatus, comprising:

a transceiver which, during operation, wirelessly communicates with network nodes of a wireless network; and

a processor communicatively coupled to the transceiver such that, during operation, the processor performs operations comprising:

transmitting, via the transceiver, a capability report to indicate a first physical downlink control channel (PDCCH) monitoring capability and a second PDCCH monitoring capability;

receiving, via the transceiver, a configuration configuring a first set of cells using the first PDCCH monitoring capability and a second set of cells using the second PDCCH monitoring capability;

determining a first monitoring budget corresponding to the first set of cells based on the first PDCCH monitoring capability and a second monitoring budget corresponding to the second set of cells based on the second PDCCH monitoring capability; and

performing a PDCCH monitoring according to the first monitoring budget and the second monitoring budget,

wherein, in determining the second monitoring budget corresponding to the second set of cells, the processor determines the second monitoring budget corresponding to the second set of cells based on:

a first formula in an event that spans on the second set of cells are aligned; or

a second formula in an event that spans on the second set of cells are not aligned.

10. The apparatus of claim 9 , wherein the first PDCCH monitoring capability comprises a slot-based PDCCH monitoring capability, and wherein the second PDCCH monitoring capability comprises a span-based PDCCH monitoring capability.

11. The apparatus of claim 9 , wherein the configuration comprises a first number of cells or component carriers (CCs) using the first PDCCH monitoring capability and a second number of cells or CCs using the second PDCCH monitoring capability.

12. The apparatus of claim 9 , wherein the first monitoring budget comprises a first control channel element (CCE) or blind decoding (BD) budget, and wherein the second monitoring budget comprises a second CCE or BD budget.

13. The apparatus of claim 9 , wherein the capability report comprises a plurality of combinations of the first PDCCH monitoring capability and the second PDCCH monitoring capability.

14. The apparatus of claim 9 , wherein, in determining the first monitoring budget corresponding to the first set of cells, the processor determines the first monitoring budget by replacing a PDCCH blind decoding capability with a Release-15 PDCCH blind decoding capability.

15. The apparatus of claim 9 , wherein, in determining the second monitoring budget corresponding to the second set of cells, the processor determines the second monitoring budget by replacing a PDCCH blind decoding capability with a Release-16 PDCCH blind decoding capability.

16. The apparatus of claim 11 , wherein, during operation, the processor further performs operations comprising:

splitting the first monitoring budget between the first number of cells or CCs using the first PDCCH monitoring capability; and

splitting the second monitoring budget between the second number of cells or CCs using the first PDCCH monitoring capability.