Patent ID: 7970356

Claim:
A location estimation method in a wireless communication system in which an access point (AP) provides an access service to a plurality of terminals, the location estimation method comprising: defining, by the AP, a plurality of beam spaces around the AP through space multiplexing; scheduling, by the AP, the beam spaces according to a predetermined pattern; forming, by the AP, a beam in at least one beam space; and detecting, by the AP, an existence and location of a terminal according to whether a response message in response to the formed beam is received from the terminal, wherein the beam contains a unique beam indication according to a beam space, and wherein detecting an existence and location of the terminal comprises: comparing the beam indication to a beam indication previously received if the terminal receives the beam indication through the beam; and transmitting a response message containing a terminal identification (ID) to the AP if the beam indication is different from the previous beam indication.