FIELD: radio engineering, communication.
SUBSTANCE: invention relates to a mobile communication system in which a carrier aggregation scheme is used, and is aimed at facilitating data communication by modifying the connection relationship between component carriers. The invention particularly discloses a method of transmitting data through user equipment, comprising steps of: receiving a message including identifier information for modifying a connection relationship between at least one downlink component carrier and at least one uplink component carrier from a base station; receiving predetermined data through at least one downlink component carrier from the base station; and transmitting feedback data to the base station for data received through the uplink component carrier modified according to the identifier information.
EFFECT: facilitating data communication by modifying the connection relationship between component carriers.
14 cl, 24 dwg
