Method for operating HARQ to change dynamic resource of wiress resource in wireless communication system, and apparatus therefor

An apparatus for performing hybrid automatic repeat and request (HARQ) in a wireless communication system, comprising;

• a radio frequency module configured to receive first information indicating that a predetermined first uplink/downlink configuration changes to a second uplink/downlink configuration;
• and
• a processor configured to;
• receive second information about one or more HARQ processes from a lower layer, wherein the second information indicates that the one or more HARQ processes cannot be supported by the second uplink/downlink configuration among HARQ processes linked to the first uplink/downlink configuration, and
• process the one or more HARQ processes based on the second information when changing to the second uplink/downlink configuration, the processing of the one or more HARQ processes comprises:
• terminating the one or more HARQ processes, and
• retransmitting one or more service data units corresponding to the one or more HARQ processes after terminating the one or more HARQ processes.