1. A method of transmission scheduling implemented by a transmitting node, the method comprising the transmitting node:transmitting a message instructing a radio node that data will be transmitted to the radio node according to the same Downlink Control Information (DCI) each period, the message comprising a duration of the period;
transmitting the DCI to the radio node for the periodic transmission;
only receiving a Hybrid Automatic Repeat Request (HARQ) acknowledgement (ACK) from the radio node in response to transmitting padding data to the radio node according to the DCI in an initial data transmission of the periodic transmission or in response to transmitting a particular Medium Access Control (MAC) Control Element to the radio node according to the DCI in the initial data transmission of the periodic transmission; and
only receiving a HARQ Negative Acknowledgement (NACK) from the radio node in response to retransmitting, to the radio node, a previous transmission for which an expected HARQ ACK was not received and for which a HARQ NACK was not received, wherein the HARQ NACK indicates to the transmitting node that the radio node encountered a decoding error with respect to the retransmitting.