Method and device for allocating resource for downlink control channel in wireless communication system, and apparatus therefor

In a wireless communication system of the present application (Time Division Duplex) TDD system, a method in which a base station transmits a downlink control channel to the mobile station it is disclosed. More specifically, the method comprising: determining the number of the down-link control channel is based on the type of the sub-frame to be transmitted, a resource block pair assigned resources for the downlink control channel per base unit; Mapping the control information for the terminal to transmit the resource by the resource allocation unit of the base unit; And sub-frames comprises the step of transmitting the downlink control channel including the control information to the mobile station, and the type of the downlink control channel is the sub-frame to be transmitted co-exist a DL transmission period and an uplink transmission period the number of the resource blocks in resource allocation per paired main unit when the is characterized in that which is determined by the length of the downlink transmission interval.