The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rate. According to various embodiments, a method performed by a serving base station in a wireless communication system may comprise: receiving information about an aggregated slot from an aggregated slot managing device; aggregating, on the basis of the information about the aggregated slot, traffic to be transmitted during a specific interval into the aggregated slot and scheduling same; determining adaptive modulation and coding (AMC) parameters separately for an aggregated slot and a non-aggregated slot; and transmitting the traffic for the aggregated slot using the determined AMC parameters.