Method and apparatus for logical channel selection

1. A user equipment (UE), comprising:

one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and

at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the computer-executable instructions to:

receive, from a base station, a block error rate (BLER) related restriction for each of a plurality of configured logical channels;

receive, from the base station, an uplink (UL) grant;

obtain a BLER related characteristic of the UL grant;

select, among the plurality of configured logical channels, one or more logical channels for the UL grant, according to the BLER related characteristic of the UL grant and the BLER related restriction for each of the plurality of configured logical channels when a first condition is met; and

allocate the UL grant to the selected one or more logical channels;

wherein the BLER related restriction for each of the plurality of configured logical channels is a list of prohibited BLER levels.

2. The UE of claim 1 , wherein the BLER related restriction for each of the plurality of configured logical channels is within a downlink (DL) radio resource control (RRC) message received from the base station.

3. The UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

obtain, by a medium access control (MAC) entity of the UE, a BLER characteristic from a physical (PHY) layer of the UE, wherein the BLER characteristic indicates a BLER level of the UL grant.

4. The UE of claim 3 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

set, by the MAC entity of the UE, the BLER level of the UL grant to a predetermined value when the MAC entity of the UE does not successfully obtain the BLER characteristic from the PHY layer of the UE.

5. The UE of claim 1 , wherein the BLER related restriction for each of the plurality of configured logical channels is a BLER threshold.

6. The UE of claim 1 , wherein the BLER related restriction for each of the plurality of configured logical channels is a list of BLER levels.

7. The UE of claim 1 , wherein:

the BLER related restriction for each of the plurality of configured logical channels is a list of bandwidth parts (BWPs); and

the BLER related characteristic of the UL grant comprises a first BWP indication indicating which BWP the UL grant is in.

8. The UE of claim 1 , wherein:

the BLER related restriction for each of the plurality of configured logical channels is a list of carriers; and

the BLER related characteristic of the UL grant comprises a first carrier which the UL grant uses.

9. The UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

identify a set of candidate logical channels among the plurality of configured logical channels, wherein the set of candidate logical channels is associated to a radio bearer configured with a packet data convergence protocol (PDCP) duplication function;

wherein the selected one or more logical channels are selected from the set of candidate logical channels.

10. The UE of claim 9 , wherein the PDCP duplication function is activated for the set of candidate logical channels.

11. The UE of claim 1 , wherein the first condition is met when the plurality of configured logical channels are associated to a radio bearer configured with a packet data convergence protocol (PDCP) duplication function.

12. The UE of claim 1 , wherein the first condition is met when the UE is connected to the base station by using a supplementary uplink carrier.

13. The UE of claim 1 , wherein the first condition is met when a specific cell or a specific bandwidth part (BWP) is configured by the base station.

14. The UE of claim 1 , wherein:

the first condition is met when the UE is configured with a first medium access control (MAC) entity and a second MAC entity;

the first MAC entity is for a master cell group (MCG); and

the second MAC entity is for a secondary cell group (SCG).

15. A method of logical channel selection performed by a user equipment (UE), the method comprising:

receiving, from a base station, a block error rate (BLER) related restriction for each of a plurality of configured logical channels;

receiving, from the base station, an uplink (UL) grant;

obtaining a BLER related characteristic of the UL grant;

selecting, among the plurality of configured logical channels, one or more logical channels for the UL grant, according to the BLER related characteristic of the UL grant and the BLER related restriction for each of the plurality of configured logical channels when a first condition is met; and

allocating the UL grant to the selected one or more logical channels;

wherein the BLER related restriction for each of the plurality of configured logical channels is a list of prohibited BLER levels.

16. The method of claim 15 , wherein the BLER related restriction for each of the plurality of configured logical channels is within a downlink (DL) radio resource control (RRC) message received from the base station.

17. The method of claim 15 , wherein obtaining the BLER related characteristic of the UL grant comprises:

obtaining, by a medium access control (MAC) entity of the UE, a BLER characteristic from a physical (PHY) layer of the UE, wherein the BLER characteristic indicates a BLER level of the UL grant.

18. The method of claim 17 , wherein obtaining the BLER level of the UL grant further comprises:

setting, by the MAC entity of the UE, the BLER level of the UL grant to a predetermined value when the MAC entity of the UE does not successfully obtain the BLER characteristic from the PHY layer of the UE.

19. The method of claim 15 , wherein the BLER related restriction for each of the plurality of configured logical channels is a BLER threshold.

20. The method of claim 15 , wherein the BLER related restriction for each of the plurality of configured logical channels is a list of BLER levels.

21. The method of claim 15 , wherein:

the BLER related restriction for each of the plurality of configured logical channels is a list of bandwidth parts (BWPs); and

the BLER related characteristic of the UL grant comprises a first BWP indication indicating which BWP the UL grant is in.

22. The method of claim 15 , wherein:

the BLER related restriction for each of the plurality of configured logical channels is a list of carriers; and

the BLER related characteristic of the UL grant comprises a first carrier which the UL grant uses.

23. The method of claim 15 , further comprising:

identifying a set of candidate logical channels among the plurality of configured logical channels, wherein the set of candidate logical channels is associated to a radio bearer configured with a packet data convergence protocol (PDCP) duplication function;

wherein the selected one or more logical channels are selected from the set of candidate logical channels.

24. The method of claim 23 , wherein the PDCP duplication function is activated for the set of candidate logical channels.

25. The method of claim 15 , wherein the first condition is met when the plurality of configured logical channels are associated to a radio bearer configured with a packet data convergence protocol (PDCP) duplication function.

26. The method of claim 15 , wherein the first condition is met when the UE is connected to the base station by using a supplementary uplink carrier.

27. The method of claim 15 , wherein the first condition is met when a specific cell or a specific bandwidth part (BWP) is configured by the base station.

28. The method of claim 15 , wherein:

the first condition is met when the UE is configured with a first medium access control (MAC) entity and a second MAC entity;

the first MAC entity is for a master cell group (MCG); and the second MAC entity is for a secondary cell group (SCG).