Priority-based interference control method in wireless communication system and device therefor

A network node including first cell configured to transmit/receive a signal on a specific resource set in a time domain, on which a higher priority is given to a second cell, in a multi-cell communication system, the network node including the first cell comprising:

• a wireless communication module;
• and
• a processor connected to the wireless communication module, the processor configured to determine whether the second cell uses the specific resource set in a prescribed one of a plurality of first Transmit Time Intervals (TTIs) corresponding to the first cell and included in a single second TTI corresponding to the second cell, based on a load of the first cell in a another resource set different in the time domain from the specific resource set, on which a higher priority is given to the first cell, being equal to or greater than a threshold,
• wherein, based on the second cell being determined not to use the specific resource in the prescribed one of the plurality of the first TTIs, the processor is further configured to transmit/receive the signal in the rest of the plurality of the first TTIs except the prescribed one of the plurality of the first TTIs without applying a restriction,
• wherein, based on the second cell being determined to use the specific resource set in the prescribed one of the plurality of the first TTIs, the processor is further configured to transmit/receive the signal in the rest of the plurality of the first TTIs except the prescribed one of the plurality of the first TTIs with applying the restriction, and
• wherein the restriction includes configuring at least one of a same TTI length as the second cell, a same subcarrier spacing as the second cell, a same cyclic prefix length as the second cell, or a same radio access technology as the second cell.