The present invention relates to a wireless communication system. Particularly, in configuring a location estimation subframe for determining the location of a terminal in a wireless communication system, the present invention involves replacing a portion of repeating patterns of a channel estimation pilot in the location estimation subframe with a location estimation pilot. In this way, the present invention is capable of transmitting a location estimation reference signal for a location-based service to the terminal while minimizing influences on an existing wireless frame structure.