Method and apparatus for performing channel sensing in a wireless communication system

A first apparatus configured to operate in a wireless communication system, the first apparatus comprising:

• a memory;
• and
• at least one processor coupled with the memory,
• wherein the at least one processor is configured to:
• receive a known signal;
• determine whether a channel available to be used for a plurality of radio technologies is occupied based on remaining power, wherein the remaining power is obtained based on cancelling a first value from power obtained on a time duration;
• and
• transmit a signal on the channel based on the determination,
• wherein the time duration is determined based on the known signal,
• wherein the first value is determined based on reception power of the known signal and a cancellation ratio, and
• wherein the cancellation ratio is equal to or higher than 0 and equal to or less than 1.