| abstract |
Methods, systems, and computer programs for enhancing HARQ-ACK timing procedure. In one aspect, a method can include encoding, by a next generation NodeB (gNB), one or more sets of physical downlink shared channels (PDSCHs) with respect to a listen before talk (LBT) operation on an unlicensed spectrum, transmitting, by the gNB, the encoded one or more sets of PDSCHs to the UE, and determining, by the gNB, scheduling for receiving a HARQ-ACK from the UE corresponding to the one or more sets of PDSCHs based on the LBT operation. |