An operation method of a base station in a communication system, comprising: configuring, by a processor, downlink, DL, resources, uplink, UL resources, and sidelink, SL resources; generating, by the processor, time division duplex, TDD,-UL-DL configuration common information, the TDD-UL-DL-configuration common information including information regarding a DL-UL transmission period, a DL pattern indicating the DL resources, a UL pattern indicating the UL resources, and a SL pattern indicating the SL resources, wherein the DL resources, the UL resources, and the SL resources are included in the DL-UL transmission period, and resources other than the DL resources, the UL resources, and the SL resources among all resources included in the DL-UL transmission period are flexible resources; transmitting, by the processor, to a user equipment, UE, system information including the TDD-UL-DL-configuration common information, generating, by the processor, TDD-UL-DL-configuration dedicated information including a slot pattern that indicates resources used for the SL communication among the flexible resources configured by the TDD-UL-DL-configuration common information; and transmitting, by the processor, to the UE a radio resource control, RRC, message including the TDD-UL-DL-configuration dedicated information; wherein one or more flexible resources among the flexible resources configured by the TDD-UL-DL-configuration common information are overwritten by the TDD-UL-DL-configuration dedicated information to be the resources used for the SL communication, and the TDD-UL-DL-configuration common information is used for configuring the DL-UL transmission period. configuring, by a processor, downlink, DL, resources, uplink, UL resources, and sidelink, SL resources; generating, by the processor, time division duplex, TDD,-UL-DL configuration common information, the TDD-UL-DL-configuration common information including information regarding a DL-UL transmission period, a DL pattern indicating the DL resources, a UL pattern indicating the UL resources, and a SL pattern indicating the SL resources, wherein the DL resources, the UL resources, and the SL resources are included in the DL-UL transmission period, and resources other than the DL resources, the UL resources, and the SL resources among all resources included in the DL-UL transmission period are flexible resources; transmitting, by the processor, to a user equipment, UE, system information including the TDD-UL-DL-configuration common information, generating, by the processor, TDD-UL-DL-configuration dedicated information including a slot pattern that indicates resources used for the SL communication among the flexible resources configured by the TDD-UL-DL-configuration common information; and transmitting, by the processor, to the UE a radio resource control, RRC, message including the TDD-UL-DL-configuration dedicated information; wherein one or more flexible resources among the flexible resources configured by the TDD-UL-DL-configuration common information are overwritten by the TDD-UL-DL-configuration dedicated information to be the resources used for the SL communication, and the TDD-UL-DL-configuration common information is used for configuring the DL-UL transmission period.