Early termination of PUSCH transmission
Aspects are provided allowing a UE to perform early termination of repetitions of an ongoing PUSCH transmission in response to a DCI from a base station indicating whether a prior PUSCH transmission or repetition was successfully decoded. The UE obtains information configuring an uplink data transmission and a repetition of the uplink data transmission. The UE sends the uplink data transmission to a base station. The UE terminates the repetition of the uplink data transmission in response to reception of downlink information in a downlink control channel. Thus, UE power reduction and enhanced resource efficiency may be achieved. Moreover, the repetition is terminated after a time gap following a CORESET where the downlink control channel is received. As a result, a start time for terminating PUSCH repetitions may be configured to accommodate various timing considerations such as dynamic TDD, different numerologies between PDCCH and PUSCH, and multiple PUSCH processing capabilities.
1. A non-transitory computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to:
obtain configuration information configuring an uplink data transmission and a repetition of the uplink data transmission;
send the uplink data transmission to a base station; and
terminate the repetition of the uplink data transmission in response to reception of downlink information in a downlink control channel,
wherein the repetition is terminated after a time gap following a control resource set (CORESET) where the downlink control channel is received,
wherein the downlink information indicates a hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK), and
wherein the downlink information includes a frequency domain resource assignment (FDRA), a modulation and coding scheme (MCS), and other parameters, and the HARQ-ACK is indicated by a first preconfigured bit value of the FDRA or of the MCS and a second preconfigured bit value of the other parameters, the second preconfigured bit value being different than the first preconfigured bit value.
2. The method of claim 1 , wherein the time gap is equal to a length of one or more symbols following a last symbol of the CORESET.
3. The method of claim 1 , wherein the time gap ends during a slot, and the terminating begins in an initial symbol of a subsequent slot.
4. The method of claim 1 , wherein the downlink information schedules a subsequent uplink data transmission after the time gap.
5. The method of claim 4 , wherein the time gap ends during a slot, and the subsequent uplink data transmission begins in an initial symbol of a subsequent slot.
6. The method of claim 1 , wherein the time gap is a function of a first subcarrier spacing (SCS) of a physical downlink control channel (PDCCH) carrying the downlink information and a second SCS of a physical uplink shared channel (PUSCH) carrying the uplink data transmission.
7. The method of claim 1 , wherein the time gap is a function of a first subcarrier spacing (SCS) of a downlink bandwidth part (BWP) including a physical downlink control channel (PDCCH) and a second SCS of an uplink BWP including a physical uplink shared channel (PUSCH).
8. The method of claim 1 , wherein the time gap is a function of a UE physical uplink shared channel (PUSCH) processing capability.
9. The method of claim 1 , wherein the time gap is a function of a configuration indicating whether a first symbol of the uplink data transmission is reserved for a demodulation reference signal (DMRS).
10. The method of claim 1 , wherein the time gap is a function of a physical uplink shared channel (PUSCH) preparation time.
11. The method of claim 1 , wherein the time gap comprises a plurality of separately configurable portions.
12. The method of claim 11 , wherein one of the separately configurable portions is pre-configured, indicated in a physical uplink shared channel (PUSCH) configuration, or dependent on UE capability.
13. The method of claim 11 , wherein one of the separately configurable portions is a function of a first subcarrier spacing (SCS) of a physical downlink control channel (PDCCH) carrying the downlink information and a second SCS of a physical uplink shared channel (PUSCH) carrying the uplink data transmission.
14. An apparatus for wireless communication, comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
obtain configuration information configuring an uplink data transmission and a repetition of the uplink data transmission;
send the uplink data transmission to a base station; and
terminate the repetition of the uplink data transmission in response to reception of downlink information in a downlink control channel,
wherein the repetition is terminated after a time gap following a control resource set (CORESET) where the downlink control channel is received,
wherein the downlink information indicates a hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK), and wherein the downlink information includes a frequency domain resource assignment (FDRA), a modulation and coding scheme (MCS), and other parameters, and the HARQ-ACK is indicated by a first preconfigured bit value of the FDRA or of the MCS and a second preconfigured bit value of the other parameters, the second preconfigured bit value being different than the first preconfigured bit value.
15. The apparatus of claim 14 , wherein the time gap is equal to a length of one or more symbols following a last symbol of the CORESET.
16. The apparatus of claim 14 , wherein the downlink information schedules a subsequent uplink data transmission after the time gap.
17. The apparatus of claim 14 , wherein the time gap is a function of a first subcarrier spacing (SCS) of a physical downlink control channel (PDCCH) carrying the downlink information and a second SCS of a physical uplink shared channel (PUSCH) carrying the uplink data transmission.
18. The apparatus of claim 14 , wherein the time gap is a function of a first subcarrier spacing (SCS) of a downlink bandwidth part (BWP) including a physical downlink control channel (PDCCH) and a second SCS of an uplink BWP including a physical uplink shared channel (PUSCH).
19. The apparatus of claim 14 , wherein the time gap is a function of a UE physical uplink shared channel (PUSCH) processing capability.
20. The apparatus of claim 14 , wherein the time gap is a function of a configuration indicating whether a first symbol of the uplink data transmission is reserved for a demodulation reference signal (DMRS).
21. The apparatus of claim 14 , wherein the time gap is a function of a physical uplink shared channel (PUSCH) preparation time.
22. The apparatus of claim 14 , wherein the time gap comprises a plurality of separately configurable portions.
23. The apparatus of claim 22 , wherein one of the separately configurable portions is a function of a first subcarrier spacing (SCS) of a physical downlink control channel (PDCCH) carrying the downlink information and a second SCS of a physical uplink shared channel (PUSCH) carrying the uplink data transmission.
24. An apparatus for wireless communication, comprising:
means for obtaining configuration information configuring an uplink data transmission and a repetition of the uplink data transmission;
means for sending the uplink data transmission to a base station; and
means for terminating the repetition of the uplink data transmission in response to reception of downlink information in a downlink control channel,
wherein the repetition is terminated after a time gap following a control resource set (CORESET) where the downlink control channel is received,
wherein the downlink information indicates a hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK), and wherein the downlink information includes a frequency domain resource assignment (FDRA), a modulation and coding scheme (MCS), and other parameters, and the HARQ-ACK is indicated by a first preconfigured bit value of the FDRA or of the MCS and a second preconfigured bit value of the other parameters, the second preconfigured bit value being different than the first preconfigured bit value.
25. The apparatus of claim 24 , wherein the downlink information schedules a subsequent uplink data transmission after the time gap.
26. A non-transitory computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to:
obtain configuration information configuring an uplink data transmission and a repetition of the uplink data transmission;
send the uplink data transmission to a base station; and
terminate the repetition of the uplink data transmission in response to reception of downlink information in a downlink control channel,
wherein the repetition is terminated after a time gap following a control resource set (CORESET) where the downlink control channel is received,
wherein the downlink information indicates a hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK), and wherein the downlink information includes a frequency domain resource assignment (FDRA), a modulation and coding scheme (MCS), and other parameters, and the HARQ-ACK is indicated by a first preconfigured bit value of the FDRA or of the MCS and a second preconfigured bit value of the other parameters, the second preconfigured bit value being different than the first preconfigured bit value.