Method and device for performing scheduling by using alternative signals in wireless communication system

A method of operating a controlee that performs a ranging with a controller using ultra wideband (UWB) communication in a wireless communication system, the method comprising:

• receiving, from the controller, a first ranging control message (RCM) comprising information of a first ranging interval for a second RCM;
• receiving, from the controller, based on the first ranging interval, an interval update message for the second RCM comprising information for a second ranging interval, wherein a ranging interval for the second RCM is changed from the first ranging interval to the second ranging interval;
• and
• receiving, from the controller, the second RCM based on the second ranging interval.

A controller that performs a ranging with a controlee using ultra wideband (UWB) communication in a wireless communication system, the controller comprising:

• a transceiver;
• a memory;
• and
• a processor configured to:
• transmit, to the controlee, a first ranging control message (RCM) comprising information of a first ranging interval for a second RCM,
• change a ranging interval for the second RCM from the first ranging interval to a second ranging interval,
• transmit, to the controlee, an interval update message for the second RCM comprising information for the changed ranging interval based on the first ranging interval, and
• transmit, to the controlee, the second RCM based on the changed ranging interval.