The present invention relates to a wireless communication system. A method for a terminal for receiving a signal by means of NAICS (Network Assisted Interference Cancellation and Suppression) in a wireless communication system supporting a carrier aggregation according to one embodiment of the present invention comprises the steps of: transmitting terminal capability information comprising band combination information indicating the band combination supported by the terminal on the carrier aggregation; and receiving the signal on the basis of the terminal capability information, wherein the band combination information may comprise a number for the maximum number of component carriers (CC) supporting the NAICS for the band combination.