Provided are a method of operating a node in a wireless communication system and a device using the same. The method includes: connecting to a parent node through an initial access process; receiving, from the parent node, first allocation information related with communication with the parent node and second allocation information related with communication with a child node; and communicating with the parent node or the child node using a specific resource based on the first allocation information and the second allocation information. When the second allocation information indicates the specific resource as a hard resource that is always available for communication with the child node, the specific resource is used for communication with the child node regardless of the first allocation information.