1. A method for determining link direction of a resource in a wireless communication system, the method performed by a user equipment (UE) and comprising:receiving frame configuration information from a base station, wherein the frame configuration information informs at least one of a default resource and a flexible resource in a frame, wherein each of the default resource is a downlink resource or an uplink resource, and the flexible resource is a specific resource which is not informed as the default resource by the frame configuration information,
receiving downlink control information (DCI) informing link direction of the flexible resource, from the base station; and
determining the link direction of the flexible resource in the frame based on both the frame configuration information and the DCI,
wherein a time duration of both the default resource and the flexible resource is determined by a transmission time interval (TTI).