Method of signaling control information in wireless communication system with multiple frequency blocks

PURPOSE: A method for signaling control information is provided to efficiently constitute control information in the broadband communications system. CONSTITUTION: The control area including a plurality of control channels is received through a specific frequency block among a plurality of frequency blocks. A first control channel for the terminal is identified in the control area. An operation is operated according to the information loaded to the first control channel. The specific frequency block transmitting the first control channel is changed to a pattern as time passes. A wireless telecommunications system supports a carrier aggregation. The bandwidth of each frequency block is established based on the bandwidth of a system block defined in a legacy system. At least one frequency block among whole frequency blocks is used as a system block defined in the legacy system.