The present disclosure relates to: a communication technique combining a 5G communication system, for supporting a higher data transfer rate than 4G systems, with IoT technology; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. According to an embodiment of the present invention, a method of a terminal side link communication is characterized by further comprising: determining a first path attenuation between a second terminal and a first terminal; determining a second path attenuation between a base station and the first terminal; determining the transmission power of the first terminal based on at least one among the first pathloss and the second pathloss; and transmitting a signal based on the transmission power of the first terminal.