Method of control information transmission, method of control information reception in carrier aggregation system and user equipment

PURPOSE: A method for transmitting and receiving control information in a carrier collection system and a terminal thereof are provided to reduce power consumption of the terminal, by reducing the frequency of blind decoding of the terminal. CONSTITUTION: A base station transmits system bandwidth information about a monitoring DL CC to a terminal(S100). The system bandwidth information about the monitoring DL CC is set statically through an RRC message. The base station constitutes a DC format including an information field and an additional indication field to the terminal. The base station maps the DCI format in a specific DCI inclusion unit(S200). The terminal performs blind decoding for a possible DCI inclusion unit in a given system bandwidth(S300).