Patent ID: 11496252

Abstract:
A user equipment (UE) configured for operation in a fifth-generation new radio (5G NR) system may be configured for Type-2 Hybrid automatic repeat request (HARQ) acknowledge (ACK) (HARQ-ACK) codebook grouping and HARQ-ACK retransmission. The UE may decode a downlink control information (DCI) format for scheduling a physical downlink shared channel (PDSCH) group of one or more PDSCHs. The DCI format may include a downlink assignment index (DAI) comprising a counter DAI (C-DAI) for the scheduled PDSCH group. The DCI format may also include a total DAI (T-DAI) for at least one of the scheduled PDSCH group and a non-scheduled PDSCH group. When the DCI format includes a new feedback indicator field for at least one of the scheduled PDSCH group and the non-scheduled PDSCH group, the UE may multiplex HARQ-ACK bits only for PDSCH receptions for transmission in a PUCCH transmission occasion scheduled by the DCI format and may refrain from multiplexing HARQ-ACK bits for PDSCH receptions that are not scheduled by the DCI format. For HARQ-ACK retransmission, the UE may retransmit HARQ-ACK bits from more than one PDSCH group in the PUCCH transmission occasion.