Hybrid automatic repeat request (HARQ) based on codeblock groups in new radio systems

A user equipment device (UE), the UE comprising:

• a radio;
• and
• a processor operably connected to the radio and configured to cause the UE to:
• decode a physical downlink control channel (PDCCH) in a current PDCCH scheduling instance 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 PDCCH scheduling instance to PDCCH 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 PDCCH scheduling instances up to the current PDCCH scheduling instance in which PDSCH transmission(s) or a downlink (DL) semi-persistent scheduling (SPS) release associated with PDCCH is present;
• and
• a counter DAI based on an accumulative number of PDCCH scheduling instances up to the current PDCCH 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.

A method, comprising:

• at a user equipment device (UE):
• decoding a physical downlink control channel (PDCCH) in a current PDCCH scheduling instance 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 PDCCH scheduling instance to PDCCH 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 PDCCH scheduling instances up to the current PDCCH scheduling instance in which PDSCH transmission(s) or a downlink (DL) semi-persistent scheduling (SPS) release associated with PDCCH is present;
• and
• a counter DAI based on an accumulative number of PDCCH scheduling instances up to the current PDCCH scheduling instance in which PDSCH transmission(s) associated with PDCCH or PDCCH indicating that a DL SPS release is present;
• and
• encoding the HARQ-ACK feedback based on the total DAI and the counter DAI.