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 communicating with the parent node or the child node using a particular resource based on the first allocation information and the second allocation information. The first allocation information indicates a resource type of the particular resource as one of three resource types, the second allocation information indicates the resource type of the particular resource as one of seven resource types. When the second allocation information indicates the particular resource as a soft downlink, soft uplink, or soft flexible resource and when it is not explicitly indicated that the particular resource is available for the communication with the child node, the particular resource is used for the communication with the parent node.