The present invention relates to a wireless communication system. A method for receiving a signal using a network assisted interference cancellation by a terminal in a wireless communication system comprises the steps of: receiving PA information corresponding to a ratio of an energy per resource element (EPRE) of a physical downlink control channel (PDSCH) to an EPRE of a common reference signal (CRS), wherein the PA information comprises first PA information and second PA information which are distinguished according to a modulation order; and removing interference of an adjacent cell using the first PA information or the second PA information corresponding to the modulation order of the signal and receiving a signal.