Methods and devices for configuring HARQ-ACK feedback
The present disclosure describes methods, system, and devices for configuring hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for physical downlink shared channel (PDSCH) transmission. The method includes receiving, by a user equipment (UE), a radio resource control (RRC) parameter to configure a one-shot HARQ-ACK feedback mode; and receiving, by the UE, a first downlink control information (DCI) comprising a first K, the first DCI corresponding to a first PDSCH. The method includes receiving, by the UE, a second DCI comprising a second K with an applicable value and an one-shot request field with a positive value, the second DCI corresponding to a second PDSCH; and transmitting, by the UE, a one-shot HARQ-ACK feedback according to a preset rule.
1 . A method for wireless communication, comprising:
configuring hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for physical downlink shared channel (PDSCH) transmission by:
receiving, by a user equipment (UE), a radio resource control (RRC) parameter to configure a one-shot HARQ-ACK feedback mode;
receiving, by the UE, a first downlink control information (DCI) comprising a first K, the first DCI corresponding to a first PDSCH;
receiving, by the UE, a second DCI comprising a second K with an applicable value and an one-shot request field with a positive value, the second DCI corresponding to a second PDSCH; and
transmitting, by the UE, a one-shot HARQ-ACK feedback according to a preset rule, wherein:
in response to the first DCI and the second DCI scheduling PDSCH with a same priority index, the UE combines a first HARQ-ACK feedback for the first PDSCH in a first one-shot HARQ-ACK codebook with a second HARQ-ACK feedback for the second PDSCH, or
in response to the first DCI and the second DCI scheduling PDSCH with different priority indexes, the UE postpones transmitting the first HARQ-ACK feedback for the first PDSCH until the UE receives another DCI comprising a K with an applicable value, an one-shot request field with a positive value, and scheduling PDSCH with a same priority index as the first DCI.
2 . The method according to claim 1 , wherein:
the UE transmits the first one-shot HARQ-ACK codebook in a slot at the second K after the second PDSCH.
3 . The method according to claim 1 , wherein:
in response to the first DCI and the second DCI scheduling PDSCH with a same priority index:
the UE transmit the first one-shot HARQ-ACK codebook in a first sub-slot or slot; and
in response to the first DCI and the second DCI scheduling PDSCH with different priority indexes:
the UE combines the second HARQ-ACK feedback for the second PDSCH in a the first one-shot HARQ-ACK codebook,
the UE combines the first HARQ-ACK feedback for the first PDSCH in a second one-shot HARQ-ACK codebook, and
the UE transmits the second one-shot HARQ-ACK codebook in a second sub-slot or slot.
4 . The method according to claim 3 , wherein:
the first sub-slot and the second sub-slot are next to each other.
5 . The method according to claim 4 , wherein:
the first sub-slot and the second sub-slot are in a slot at the second K after the second PDSCH.
6 . The method according to claim 4 , wherein:
the first sub-slot is prior to the second sub-slot.
7 . The method according to claim 4 , wherein:
in response to the second DCI comprising the priority index of 1, the first sub-slot is prior to the second sub-slot; and
in response to the first DCI comprising the priority index of 0, the second sub-slot is prior to the first sub-slot.
8 . The method according to claim 3 , wherein:
the second DCI comprises a third K of an applicable value;
the first sub-slot is in a slot at the second K after the second PDSCH; and
the second sub-slot is in a slot at the third K after the second PDSCH.
9 . The method according to claim 8 , wherein:
the third K comprises at least one of: an offset of the second K, or an offset of the first sub-slot.
10 . The method according to claim 3 , wherein:
the second DCI comprises the second K and a first PRI corresponding to a second K, and a third K of an applicable value and a second PRI corresponding to the third K;
the first sub-slot is in a slot at the second K after the second PDSCH and corresponds to the first PRI; and
the second sub-slot is in a slot at the third K after the second PDSCH and corresponds to the second PRI.
11 . The method according to claim 10 , wherein:
the first sub-slot is prior to the second sub-slot.
12 . The method according to claim 1 , wherein:
in response to the first DCI and the second DCI scheduling PDSCH with a same priority index:
the UE combines a first HARQ-ACK feedback for the first PDSCH in a first sub-codebook with a second HARQ-ACK feedback for the second PDSCH in a the first one-shot HARQ-ACK codebook; and
in response to the first DCI and the second DCI scheduling PDSCH with different priority indexes:
the UE combines the first HARQ-ACK feedback in the first sub-codebook in the first one-shot HARQ-ACK codebook, and
the UE combines the second HARQ-ACK feedback in the first sub-codebook in the first one-shot HARQ-ACK codebook.
13 . An apparatus comprising:
a memory storing instructions; and
a processor in communication with the memory, wherein, when the processor executes the instructions, the processor is configured to cause the apparatus to perform configuring hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for physical downlink shared channel (PDSCH) transmission by:
receiving a radio resource control (RRC) parameter to configure a one-shot HARQ-ACK feedback mode;
receiving a first downlink control information (DCI) comprising a first K, the first DCI corresponding to a first PDSCH;
receiving a second DCI comprising a second K with an applicable value and an one-shot request field with a positive value, the second DCI corresponding to a second PDSCH; and
transmitting a one-shot HARQ-ACK feedback according to a preset rule, wherein:
in response to the first DCI and the second DCI scheduling PDSCH with a same priority index, the apparatus is configured to combine a first HARQ-ACK feedback for the first PDSCH in a first one-shot HARQ-ACK codebook with a second HARQ-ACK feedback for the second PDSCH, or
in response to the first DCI and the second DCI scheduling PDSCH with different priority indexes, the apparatus postpones transmitting the first HARQ-ACK feedback for the first PDSCH until the apparatus receives another DCI comprising a K with an applicable value, an one-shot request field with a positive value, and scheduling PDSCH with a same priority index as the first DCI.
14 . The apparatus according to claim 13 , wherein:
in response to the first DCI and the second DCI scheduling PDSCH with a same priority index:
the apparatus transmit the first one-shot HARQ-ACK codebook in a first sub-slot or slot; and
in response to the first DCI and the second DCI scheduling PDSCH with different priority indexes:
the apparatus combines the second HARQ-ACK feedback for the second PDSCH in a first one-shot HARQ-ACK codebook,
the apparatus combines the first HARQ-ACK feedback for the first PDSCH in a second one-shot HARQ-ACK codebook, and
the apparatus transmit the second one-shot HARQ-ACK codebook in a second sub-slot or slot.
15 . The apparatus according to claim 13 , wherein:
in response to the first DCI and the second DCI scheduling PDSCH with a same priority index:
the apparatus combines a first HARQ-ACK feedback for the first PDSCH in a first sub-codebook with a second HARQ-ACK feedback for the second PDSCH in the first one-shot HARQ-ACK codebook; and
in response to the first DCI and the second DCI scheduling PDSCH with different priority indexes:
the apparatus combines the first HARQ-ACK feedback in the first sub-codebook in the first one-shot HARQ-ACK codebook, and
the apparatus combines the second HARQ-ACK feedback in the first sub-codebook in the first one-shot HARQ-ACK codebook.
16 . A computer program product comprising a computer-readable program medium storing instructions, wherein, the instructions, when executed by a processor, are configured to cause the processor to perform:
configuring hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for physical downlink shared channel (PDSCH) transmission by:
receiving a radio resource control (RRC) parameter to configure a one-shot HARQ-ACK feedback mode;
receiving a first downlink control information (DCI) comprising a first K, the first DCI corresponding to a first PDSCH;
receiving a second DCI comprising a second K with an applicable value and an one-shot request field with a positive value, the second DCI corresponding to a second PDSCH; and
transmitting a one-shot HARQ-ACK feedback according to a preset rule, wherein:
in response to the first DCI and the second DCI scheduling PDSCH with a same priority index, the processor is configured to combine a first HARQ-ACK feedback for the first PDSCH in a first one-shot HARQ-ACK codebook with a second HARQ-ACK feedback for the second PDSCH, or
in response to the first DCI and the second DCI scheduling PDSCH with different priority indexes, the processor postpones transmitting the first HARQ-ACK feedback for the first PDSCH until the processor receives another DCI comprising a K with an applicable value, an one-shot request field with a positive value, and scheduling PDSCH with a same priority index as the first DCI.