The disclosure relates to a communication technique for convergence between a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system and a technology for Internet of Things (IoT), and a system thereof. The disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail businesses, security and safety related services, etc.) based on the 5G communication technology and the IoT-related technology. Disclosed are a method and an apparatus for determining a time domain resource area allocation. A method of a terminal includes receiving, from a base station, downlink control information (DCI) including information indicating a channel occupancy (CO) duration of the base station; identifying a resource associated with a configured grant for an uplink signal within the CO duration; identifying a configuration for a symbol of the resource, in case that a slot format indicator (SFI) for the resource is not provided in the DCI; and transmitting, to the base station, the uplink signal in the resource based on the identified configuration.