A method of transmit apparatus in a wireless communication system supporting ranging capability is provided. The method comprises determining a beacon interval including a ranging management period and a ranging period, wherein the beacon interval is a variable interval, generating a beacon signal including information for a number of channel access slots corresponding to a ranging contention access period (RCAP) and a ranging contention free period (RCFP), transmitting, to a receive apparatus, the beacon signal at the determined beacon interval, and transmitting, to the receive apparatus, at least one channel access slot in the ranging management period.