Methods and apparatuses for SPS HARQ-ACK transmission
A method by a user equipment (UE) includes receiving a radio resource control (RRC) configuration carrying a configuration for a first downlink (DL) channel and an uplink (UL) channel, receiving the first DL channel and a second DL channel, and canceling the UL channel when a timing condition between the first DL channel and the second DL channel is satisfied.
1. A method performed by a user equipment (UE), the method comprising:
receiving a radio resource control (RRC) configuration carrying a configuration for a first downlink (DL) channel and an uplink (UL) channel;
receiving the first DL channel and a second DL channel; and
canceling the UL channel transmission for a hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback when a timing condition between the first DL channel and the second DL channel is satisfied, wherein:
the first DL channel is a semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) configured by one of one or more SPS configurations,
the UL channel is a physical uplink control channel (PUCCH) for a HARQ-ACK feedback associated with the SPS PDSCH, and
the second DL channel is a physical downlink control channel (PDCCH) carrying an SPS PDSCH release of one or more of the one or more SPS configurations.
2. The method of claim 1 , wherein the timing condition is that the second DL channel is received no later than the first DL channel.
3. The method of claim 1 , wherein the first DL channel overlaps the second DL channel in time domain.
4. The method of claim 1 , wherein the SPS PDSCH release is carried in a downlink control information (DCI) format.
5. The method of claim 1 , wherein the timing condition is that a last symbol of the PDCCH is received not after a last symbol of the SPS PDSCH in a slot.
6. A user equipment (UE), comprising:
one or more non-transitory computer-readable media storing computer-executable instructions for scheduling radio resources for the UE; 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 a radio resource control (RRC) configuration carrying a configuration for a first downlink (DL) channel and an uplink (UL) channel;
receive the first DL channel and a second DL channel; and
cancel the UL channel transmission for a hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback when a timing condition between the first DL channel and the second DL channel is satisfied, wherein:
the first DL channel is a semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) configured by one of one or more SPS configurations,
the UL channel is a physical uplink control channel (PUCCH) for the HARQ-ACK feedback associated with the SPS PDSCH, and
the second DL channel is a physical downlink control channel (PDCCH) carrying an SPS PDSCH release of one or more of the one or more SPS configurations.
7. The UE of claim 6 , wherein the timing condition is that the second DL channel is received no later than the first DL channel.
8. The UE of claim 6 , wherein the first DL channel overlaps the second DL channel in time domain.
9. The UE of claim 6 , wherein the SPS PDSCH release is carried in a downlink control information (DCI) format.
10. The UE of claim 6 , wherein the timing condition is that a last symbol of the PDCCH is received not after a last symbol of the SPS PDSCH in a slot.