Communication method and user equipment for operations with bandwidth part switching

1. A communication method for operations with Bandwidth Part (BWP) switching performed by a User Equipment (UE) configured, by a Base Station (BS), with a serving cell and a dormancy group, the serving cell belonging to the dormancy group, the communication method comprising:

activating a dormant BWP as an activated BWP for the serving cell;

receiving, from the BS, one of a first indication for BWP switching for the serving cell and a second indication for BWP switching for the dormancy group;

switching the activated BWP for the serving cell, based on one of the first indication and the second indication, from the dormant BWP to a non-dormant BWP; and

triggering a first Power Headroom Reporting (PHR) upon switching the activated BWP for the serving cell from the dormant BWP to the non-dormant BWP.

2. The communication method of claim 1 , further comprising:

activating the serving cell;

activating a specific BWP for the serving cell upon activating the serving cell, the specific BWP configured by a BWP identity (firstActiveDownlinkBWP-Id); and

triggering a second PHR after activating the serving cell if the specific BWP is not a dormant BWP.

3. The communication method of claim 2 , further comprising:

initializing or reinitializing any suspended configured grant of a specific configured grant on the specific BWP after activating the serving cell if the specific BWP is not a dormant BWP.

4. The communication method of claim 1 , further comprising:

initializing or reinitializing any suspended configured grant of a specific configured grant on the non-dormant BWP upon switching the activated BWP for the serving cell from the dormant BWP to the non-dormant BWP.

5. The communication method of claim 1 , further comprising performing operations on the dormant BWP, the operations comprising:

stopping monitoring a Physical Downlink Control Channel (PDCCH) on the serving cell; and

performing Channel State Information (CSI) measurements for the serving cell.

6. The communication method of claim 1 , wherein:

the second indication includes a bit;

when the bit is set to a first binary value, the UE is indicated to switch the activated BWP for the serving cell from the non-dormant BWP to the dormant BWP; and

when the bit is set to a second binary value, the UE is indicated to switch the activated BWP for the serving cell from the dormant BWP to the non-dormant BWP.

7. The communication method of claim 1 , wherein the second indication is received via a Physical Downlink Control Channel (PDCCH), and the indication is included in one of Downlink Control Information (DCI) scrambled by a Power Saving Radio Network Temporary Identity (PS-RNTI), DCI with format 0_1, and DCI with format 1_1.

8. The communication method of claim 1 , wherein the second indication includes a bitmap associated with at least one dormancy group, each bit of the bitmap corresponding to one of the at least one dormancy group.

9. The communication method of claim 1 , wherein the first indication is received, via a Physical Downlink Control Channel (PDCCH) or via a Radio Resource Control (RRC) reconfiguration message, for BWP switching for the serving cell.

10. The communication method of claim 1 , wherein the dormant BWP and the non-dormant BWP are Downlink (DL) BWPs.

11. A User Equipment (UE) for operations with Bandwidth Part (BWP) switching, the UE configured, by a Base Station (BS), with a serving cell and a dormancy group, the serving cell belonging to the dormancy group, the UE comprising:

a processor; and

a memory coupled to the processor, wherein the memory stores at least one computer-executable program that, when executed by the processor, causes the processor to:

activate a dormant BWP as an activated BWP for the serving cell;

receive, from the BS, one of a first indication for BWP switching for the serving cell and a second indication for BWP switching for the dormancy group;

switch the activated BWP for the serving cell, based on one of the first indication and the second indication, from the dormant BWP to a non-dormant BWP; and

trigger a first Power Headroom Reporting (PHR) upon switching the activated BWP for the serving cell from the dormant BWP to the non-dormant BWP.

12. The UE of claim 11 , wherein when the at least one computer-executable program is executed by the processor, the computer-executable program further causes the processor to:

activate the serving cell;

activate a specific BWP for the serving cell upon activating the serving cell, the specific BWP configured by a BWP identity (firstActiveDownlinkBWP-Id); and

trigger a second PHR after activating the serving cell if the specific BWP is not a dormant BWP.

13. The UE of claim 12 , wherein when the at least one computer-executable program is executed by the processor, the computer-executable program further causes the processor to:

initialize or reinitialize any suspended configured grant of a specific configured grant on the specific BWP after activating the serving cell if the specific BWP is not a dormant BWP.

14. The UE of claim 11 , wherein when the at least one computer-executable program is executed by the processor, the computer-executable program further causes the processor to:

initialize or reinitialize any suspended configured grant of a specific configured grant on the non-dormant BWP upon switching the activated BWP for the serving cell from the dormant BWP to the non-dormant BWP.

15. The UE of claim 11 , wherein when the at least one computer-executable program is executed by the processor, the computer-executable program further causes the processor to perform operations on the dormant BWP, the operations comprising:

stopping monitoring a Physical Downlink Control Channel (PDCCH) on the serving cell; and

performing Channel State Information (CSI) measurements for the serving cell.

16. The UE of claim 11 , wherein:

the second indication includes a bit;

when the bit is set to a first binary value, the UE is indicated to switch the activated BWP for the serving cell from the non-dormant BWP to the dormant BWP; and

when the bit is set to a second binary value, the UE is indicated to switch the activated BWP for the serving cell from the dormant BWP to the non-dormant BWP.

17. The UE of claim 11 , wherein the second indication is received via a Physical Downlink Control Channel (PDCCH), and the indication is included in one of Downlink Control Information (DCI) scrambled by a Power Saving Radio Network Temporary Identity (PS-RNTI), DCI with format 0_1, and DCI with format 1_1.

18. The UE of claim 11 , wherein the second indication includes a bitmap associated with at least one dormancy group, each bit of the bitmap corresponding to one of the at least one dormancy group.

19. The UE of claim 11 , wherein the first indication is received, via a Physical Downlink Control Channel (PDCCH) or via a Radio Resource Control (RRC) reconfiguration message, for BWP switching for the serving cell.

20. The UE of claim 11 , wherein the dormant BWP and the non-dormant BWP are Downlink (DL) BWPs.