A communication method and system for converging a 5th generation (5G) communication system for supporting higher data rates beyond a 4th generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method performed by a terminal in a wireless communication system is provided. The method includes identifying that sidelink channel state information (SL-CSI) reporting is triggered; identifying whether SL resources are allocated for new transmission; performing a logical channel prioritization for the SL resources; and determining whether to trigger a scheduling request for the SL-CSI reporting based on a result of the logical channel prioritization.