Provided are a node operation method in a wireless communication system and an apparatus using the method. The method includes receiving first allocation information related to communication with a parent node and second allocation information related to communication with a child node and performing communication with the parent node or child node based on the first and the second allocation information. The first allocation information informs of resource type of a specific resource as one of three, and the second allocation information informs of resource type of the specific resource as one of seven. When the second allocation information informs the specific resource as a hard resource which can be always used for communication with the child node, the specific resource is used for communication with the child node irrespective of the first allocation information.