Method for use in transmitting URLLC data in NR system

A method for performing control channel link adaptation and early termination of data channel retransmission upon a control channel missed-detection using a system, the system for a gNodeB (gNB) to detect a control channel missed detection at a plurality of User Equipments (UEs), the method comprising:

• at the gNB, determining and allocating Uplink (UL) control resources for sharing among the UEs in transmitting acknowledgement information;
• at the gNB, configuring the plurality of UEs with information on the shared UL control resources for further selection when having the acknowledgement information for transmission;
• at the gNB, upon the arrival of a Ultra-Reliable Low-Latency Communication (URLLC) transport block for Downlink (DL) transmission, scheduling and transmitting a control channel to a UE of the plurality of UEs, and providing the UE with scheduling information including a retransmissions pattern having first slot and one or more second slots;
• at the gNB, following the transmitted control channel, transmitting the associated data channel's retransmissions in the first slot and in the one or more second slots of the retransmissions pattern;
• at the UE, monitoring one or more Control Resource Sets (CORESETs) and associated search spaces per configuration, for intended control channels or intended set of scheduling information for:
• associated data channel's retransmission reception and decoding, and
• UL control channel resource selection in transmitting acknowledgement information;
• at the UE, upon successful detection of an intended set of scheduling information:
• in the first slot of the retransmission pattern, performing the reception and decoding of the scheduled data channel's retransmissions;
• and
• on the UL control resource within the slot that corresponds to the first slot of the retransmission pattern,
• transmitting Acknowledgement (ACK) or Negative Acknowledgement (NACK) as indication to the gNB;
• at the gNB, monitoring a slot of the UL control channel resources that corresponds to the first slot having the transmitted data channel's retransmission, for indication of ACK or NACK from the UE;
• at the UE, upon the unsuccessful reception and decoding of all data channel's retransmissions scheduled within the first slot, in the one or more second slots per indicated retransmission pattern:
• performing the reception and decoding of any remaining scheduled data channel's retransmissions;
• and on the UL control resource within the slot that corresponds to the one or more second slots of the retransmission pattern, transmitting ACK as indication to the gNB upon successful reception and decoding of a data channel's retransmission scheduled in the one or more second slots;
• and
• at the gNB, monitoring the UL control resource slot that corresponds to the one or more second slots having the transmitted data channel's retransmission, for indication of ACK from the UE.