Method and apparatus for timely scheduling
Embodiments of the present application are directed to a method and apparatus for timely scheduling. The method may include: configuring DRX configuration information; and preventing a MAC entity from entering into inactive time in response to that a first MAC PDU is not transmitted in an uplink grant.
1. A method performed by a user equipment (UE), the method comprising:
receiving signaling that indicates an uplink grant for a retransmission, wherein a medium access control (MAC) entity associated with the UE is in an active state during the uplink grant based at least in part on discontinuous reception (DRX) configuration information;
canceling transmission of a MAC protocol data unit (PDU) in the uplink grant based at least in part on a listen before talk (LBT) procedure failure; and
maintaining, responsive to canceling the transmission of the MAC PDU in the uplink grant, the MAC entity associated with the UE in the active state independent of the DRX configuration information.
2. The method of claim 1 , wherein the MAC entity associated with the UE is configured with priorityBasedPrioritization, and wherein the uplink grant is a de-prioritized uplink grant, and the method further comprises:
transmitting an additional MAC PDU in a prioritized uplink grant based at least in part on canceling the transmission of the MAC PDU.
3. The method of claim 2 , wherein the prioritized uplink grant is a configured grant.
4. A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
receive signaling that indicates an uplink grant for a retransmission, wherein a medium access control (MAC) entity associated with the UE is in an active state during the uplink grant based at least in part on discontinuous reception (DRX) configuration information;
cancel transmission of a MAC protocol data unit (PDU) in the uplink grant based at least in part on a listen before talk (LBT) procedure failure; and
maintain, responsive to canceling the transmission of the MAC PDU in the uplink grant, the MAC entity associated with the UE in the active state independent of the DRX configuration information.
5. The UE of claim 4 , wherein the MAC entity associated with the UE is configured with priorityBasedPrioritization, and the uplink grant is a de-prioritized uplink grant, and the at least one processor is configured to cause the UE to:
transmit an additional MAC PDU in a prioritized uplink grant based at least in part on canceling the transmission of the MAC PDU.
6. The UE of claim 5 , wherein the signaling is associated with a physical downlink control channel (PDCCH) addressed with a configured scheduling-radio network temporary identifier (CS-RNTI), and wherein a hybrid automatic repeat request (HARQ) buffer is not empty.
7. The UE of claim 5 , wherein the uplink grant is a configured grant.
8. The UE of claim 5 , wherein the prioritized uplink grant is a configured grant.
9. The UE of claim 5 , wherein the DRX configuration information comprises a retransmission timer, and wherein to maintain the MAC entity associated with the UE in the active state, the at least one processor is configured to cause the UE to:
start the retransmission timer for a hybrid automatic repeat request (HARQ) process of the additional MAC PDU or the MAC PDU.
10. The UE of claim 5 , wherein the DRX configuration information comprises a hybrid automatic repeat request (HARQ) round-trip-time (RTT) timer, and wherein to maintain the MAC entity associated with the UE in the active state, the at least one processor is configured to cause the UE to:
start the HARQ RTT timer for a HARQ process of the additional MAC PDU; or
start the HARQ RTT timer for a HARQ process of the MAC PDU.
11. The UE of claim 10 , wherein the at least one processor is further configured to cause the UE to:
set a value of the HARQ RTT timer for the HARQ process of the additional MAC PDU or the HARQ process of the MAC PDU to less than the HARQ RTT timer in the DRX configuration information or to zero.
12. The UE of claim 10 , wherein the at least one processor is further configured to cause the UE to:
set a value of the HARQ RTT timer for the HARQ process of the additional MAC PDU or the HARQ process of the MAC PDU with a delta value.
13. The UE of claim 12 , wherein the at least one processor is further configured to cause the UE to:
set the value of the HARQ RTT timer for the HARQ process of the additional MAC PDU or the HARQ process of the MAC PDU with a difference between the HARQ RTT timer and the delta value.
14. The UE of claim 4 , wherein the DRX configuration information comprises a new round trip time (RTT) timer, wherein the new RTT timer is configured per HARQ process and indicates a minimum duration before an uplink HARQ retransmission grant is expected by the MAC entity associated with the UE.
15. The UE of claim 4 , wherein the DRX configuration information comprises a new timer, wherein the UE is in the active state when the new timer is running.
16. The UE of claim 4 , wherein at least one of the DRX configuration information, capability signaling, a MAC control element (CE), or downlink control information (DCI) indicates for the UE to maintain the MAC entity associated with the UE in the active state.
17. A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive signaling that indicates an uplink grant for a retransmission, wherein a medium access control (MAC) entity associated with the processor is in an active state during the uplink grant based at least in part on discontinuous reception (DRX) configuration information;
cancel transmission of a MAC protocol data unit (PDU) in the uplink grant based at least in part on a listen before talk (LBT) procedure failure; and
maintain, responsive to canceling the transmission of the MAC PDU in the uplink grant, the MAC entity associated with the processor in the active state independent of the DRX configuration information.
18. The processor of claim 17 , wherein the MAC entity associated with the processor is configured with priorityBasedPrioritization, and wherein the uplink grant is a de-prioritized uplink grant, and the at least one controller is further configured to cause the processor to:
transmit an additional MAC PDU in a prioritized uplink grant based at least in part on canceling the transmission of the MAC PDU.
19. The processor of claim 18 , wherein signaling is associated with a physical downlink control channel (PDCCH) addressed with a configured scheduling-radio network temporary identifier (CS-RNTI), and wherein a hybrid automatic repeat request (HARQ) buffer is not empty.
20. The processor of claim 18 , wherein the prioritized uplink grant is a configured grant.