receive a radio resource control (RRC) configuration for a hybrid automatic repeat request (HARQ) transmission, the RRC configuration including a code block group (CBG) configuration and a transport block group (TBG) configuration;

determine, based on the CBG configuration, a number of code blocks (CBs) for each of a plurality of CBGs for HARQ feedback;

determine, based on the TBG configuration, a number of transport blocks (TBs) for each of a plurality of TBGs for the HARQ feedback, wherein at least one TBG in the plurality of TBGs includes multiple TBs;

receive, from a base station, a transmission comprising a plurality of TBs in a transmission time interval (TTI), each of the plurality of TBs comprising a plurality of CBs;

group the plurality of CBs into one or more CBGs based on the determined number of CBs for each of the plurality of CBGs;

group the plurality of TBs into one or more TBGs based on the determined number of TBs for each of the plurality of TBGs;

associate each of the one or more CBGs with each of the one or more TBGs with at least one HARQ feedback bit in the HARQ feedback;

transmit, to the base station, the HARQ feedback, the HARQ feedback being based on the number of CBs for each of the plurality of CBGs and the number of TBs for each of the plurality of TBGs, wherein the at least one processor is configured to indicate an acknowledgement (ACK) for the at least one HARQ feedback bit in the HARQ feedback if CBs in a corresponding CBG and a corresponding TBG are successfully decoded, or indicate a negative acknowledgement (NACK) for the at least one HARQ feedback bit in the HARQ feedback if at least one CB in the corresponding CBG and the corresponding TBG is not decoded; and

receive, from the base station, a retransmission for CBs in the corresponding CBG and the corresponding TBG.