What happens if network doesn’t get that ACK/NACK from UE?

When UE is sending ACK/NACK to NW, what happens if NW doesn’t get that ACK/NACK from UE?

retransmissions with MCS 29 30 and 31

yes but then what happens with the previous harq id


  1. let suppose NW send data with HARQ id 1, RV0 to UE
  2. UE decodes the data and sends the ACK

what happens when NW dosen’t receive the ACK from UE ? Will the NW send the same data with same HARQID(i.e 1) and RV0 again to UE?

NW retransmit the data with different RV, use same HARQ process as initial transmission.