METHOD AND APPARATUS OF PROXIMITY ESTIMATION USING ROUND TRIP TIME IN A WIRELESS COMMUNICATION SYSTEM

摘要

The present invention relates to a method and an apparatus for proximity estimation for measuring distance of a device in a wireless communications system. The method in the present invention comprises the following processes: a first device transmits a first signal to a second device; the first device receives a second signal from the second device as a response to the first signal; and the first device measures distance between the first device and the second device based on a phase difference between the first signal and the second signal.