Hybrid automatic repeat request (HARQ) based on codeblock groups in new radio systems
Embodiments of a User Equipment (UE), Generation Node-B (gNB) and methods of communication are disclosed herein. The UE may receive a physical downlink control channel (PDCCH) that schedules a physical downlink shared channel (PDSCH) in a slot, and on a component carrier (CC) of a plurality of CCs. The PDCCH may include a total downlink assignment index (DAI) and a counter DAI for hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback of the PDSCH. The total DAI may indicate a total number of pairs of CCs and slots for the HARQ-ACK feedback. The UE may encode the HARQ-ACK feedback to include a bit that indicates whether the PDSCH is successfully decoded. A size of the HARQ-ACK feedback may be based on the total DAI, and a position of the bit may be based on the counter DAI.
1. A baseband processor, comprising a hardware processor configured to, when executing instructions stored in a memory, perform operations comprising:
decode a physical downlink control channel (PDCCH) that schedules a physical downlink shared channel (PDSCH) in a scheduled slot of a plurality of slots, the PDSCH further scheduled on a scheduled current component carrier (CC) of a plurality of CCs, wherein the plurality of CCs comprises different sub-carrier spacings, wherein the PDCCH comprises a downlink control information (DCI) that comprises:
a total downlink assignment index (DAI) for hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback, wherein the total DAI is updated from scheduling instance to scheduling instance, wherein a first CC of the plurality of CCs has additional scheduling instances in comparison to a second CC of the plurality of CCs and the total DAI indicates a number of scheduling instances up to a current scheduling instance in which PDSCH transmission(s) associated with PDCCH or PDCCH indicating that a downlink (DL) semi-persistent scheduling (SPS) release is present; and
a counter DAI based on an accumulative number of scheduling instances up to the current scheduling instance in which PDSCH transmission(s) associated with PDCCH or PDCCH indicating that a DL SPS release is present; and
encode the HARQ-ACK feedback based on the total DAI and the counter DAI.
2. The baseband processor of claim 1 , wherein the HARQ-ACK feedback includes per transport block (TB) HARQ-ACK information.
3. The baseband processor of claim 1 , wherein the HARQ-ACK feedback includes per transport block (TB) HARQ-ACK information and per code block group (CBG) HARQ-ACK information.
4. The baseband processor of claim 3 , wherein the per TB HARQ-ACK information is included in a per TB sub-codebook and the per CBG HARQ-ACK information is included in a per CBG sub-codebook.
5. The baseband processor of claim 4 , wherein the HARQ-ACK feedback includes a concatenation of the per TB sub-codebook and per CBG sub-codebook.
6. The baseband processor of claim 5 , wherein separate counter DAIs and total DAIs apply to each of the per TB sub-codebook and per CBG sub-codebook.
7. The baseband processor of claim 1 , wherein separate counter DAIs and total DAIs apply to each HARQ-ACK sub-codebook.
8. A non-transitory computer readable memory medium (NTCRM), comprising program instructions, the program instructions configured to cause a user equipment device (UE) to:
decode a physical downlink control channel (PDCCH) that schedules a physical downlink shared channel (PDSCH) in a scheduled slot of a plurality of slots, the PDSCH further scheduled on a scheduled current component carrier (CC) of a plurality of CCs, wherein the plurality of CCs comprises different sub-carrier spacings, wherein the PDCCH comprises a downlink control information (DCI) that comprises:
a total downlink assignment index (DAI) for hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback, wherein the total DAI is updated from scheduling instance to scheduling instance, wherein a first CC of the plurality of CCs has additional scheduling instances in comparison to a second CC of the plurality of CCs and the total DAI indicates a number of scheduling instances up to a current scheduling instance in which PDSCH transmission(s) associated with PDCCH or PDCCH indicating that a downlink (DL) semi-persistent scheduling (SPS) release is present; and
a counter DAI based on an accumulative number of scheduling instances up to the current scheduling instance in which PDSCH transmission(s) associated with PDCCH or PDCCH indicating that a DL SPS release is present; and
encode the HARQ-ACK feedback based on the total DAI and the counter DAI.
9. The NTCRM of claim 8 , wherein the HARQ-ACK feedback includes per transport block (TB) HARQ-ACK information.
10. The NTCRM of claim 8 , wherein the HARQ-ACK feedback includes per transport block (TB) HARQ-ACK information and per code block group (CBG) HARQ-ACK information.
11. The NTCRM of claim 10 , wherein the per TB HARQ-ACK information is included in a per TB sub-codebook and the per CBG HARQ-ACK information is included in a per CBG sub-codebook.
12. The NTCRM of claim 11 , wherein the HARQ-ACK feedback includes a concatenation of the per TB sub-codebook and per CBG sub-codebook.
13. The NTCRM of claim 12 , wherein separate counter DAIs and total DAIs apply to each of the per TB sub-codebook and per CBG sub-codebook.
14. The NTCRM of claim 8 , wherein separate counter DAIs and total DAIs apply to each HARQ-ACK sub-codebook.
15. An apparatus, comprising means to:
decode a physical downlink control channel (PDCCH) that schedules a physical downlink shared channel (PDSCH) in a scheduled slot of a plurality of slots, the PDSCH further scheduled on a scheduled current component carrier (CC) of a plurality of CCs, wherein the plurality of CCs comprises different sub-carrier spacings, wherein the PDCCH comprises a downlink control information (DCI) that comprises:
a total downlink assignment index (DAI) for hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback, wherein the total DAI is updated from scheduling instance to scheduling instance, wherein a first CC of the plurality of CCs has additional scheduling instances in comparison to a second CC of the plurality of CCs and the total DAI indicates a number of scheduling instances up to a current scheduling instance in which PDSCH transmission(s) associated with PDCCH or PDCCH indicating that a downlink (DL) semi-persistent scheduling (SPS) release is present; and
a counter DAI based on an accumulative number of scheduling instances up to the current scheduling instance in which PDSCH transmission(s) associated with PDCCH or PDCCH indicating that a DL SPS release is present; and
encode the HARQ-ACK feedback based on the total DAI and the counter DAI.
16. The apparatus of claim 15 , wherein the HARQ-ACK feedback includes per transport block (TB) HARQ-ACK information.
17. The apparatus of claim 15 , wherein the HARQ-ACK feedback includes per transport block (TB) HARQ-ACK information and per code block group (CBG) HARQ-ACK information.
18. The apparatus of claim 17 , wherein the per TB HARQ-ACK information is included in a per TB sub-codebook and the per CBG HARQ-ACK information is included in a per CBG sub-codebook.
19. The apparatus of claim 18 , wherein the HARQ-ACK feedback includes a concatenation of the per TB sub-codebook and per CBG sub-codebook.
20. The apparatus of claim 15 , wherein separate counter DAIs and total DAIs apply to each HARQ-ACK sub-codebook.