Two part hybrid automatic repeat request acknowledgement (harq-ack) for compressing a harq-ack payload

A user equipment (UE), comprising:

• one or more processors;
• and
• one or more memories coupled with the one or more processors and storing processor-executable code that, when executed by the one or more processors, is configured to cause the UE to:
• receive, from a network node, a group of downlink transmissions;
• form a first hybrid automatic repeat request (HARQ)-acknowledgement (ACK) part and a second HARQ-ACK part associated with a HARQ-ACK payload in accordance with a transformation scheme, the HARQ-ACK payload including HARQ feedback for each one of the group of downlink transmissions, a size of the second HARQ-ACK part being a function of the first HARQ-ACK part;
• separately encode the first HARQ-ACK part and the second HARQ-ACK part;
• and
• transmit, to the network node, the encoded first HARQ-ACK part and the encoded second HARQ-ACK part.