Transmission by an STA located in an edge of a BSS may act as an interference to a neighbor BSS. Therefore, when the CCA threshold of the STA located in the edge of the BSS is increased to decrease sensitivity of medium sensing of the STA, system capability may deteriorate. Accordingly, the STA located in the edge of the BSS may decrease the interference to the neighbor BSS on the basis of a TPC-based operation.

The AP may increase an STA Tx opportunity (or channel access opportunity) by increasing a CCA threshold of an STA located in the edge of the BSS or located in an overlapping manner with the neighbor BSS. If the CCS threshold of the STA is increased, the sensitivity of the medium sensing of the STA may be decreased, and the STA Tx opportunity (or channel access opportunity) may be increased. According to an embodiment of the present invention, the AP may decrease the interference to the neighbor BSS by controlling transmit power while increasing the CCA threshold for the STA. The AP may decrease an interference range caused by the STA by decreasing the transmit power of the STA.

Further, the AP may allocate different transmission resources to a TPC STA and a non-TPC STA as described above with reference to FIG. 1 to FIG. 10. For example, the AP may configure a time resource for the non-TPC STA and a time resource for the TPC STA in a non-overlapping manner. Alternatively, the AP may configure a channel for the non-TPC STA and a channel for the TPC STA in a non-overlapping manner.