The disclosure relates to a 5th Generation (5G) or 6th Generation (6G) communication system for supporting a higher data transmission rate. A method performed by a session management function (SMF) entity in a wireless communication system is provided. The method includes transmitting, to a user plane function (UPF) entity, information indicating a list of quality of service (QoS) flows over which access performance measurements are to be performed, receiving, from the UPF entity, information indicating user datagram protocol (UDP) ports allocated for the QoS flows, and transmitting, to a user equipment (UE), information including the list of QoS flows and the UDP ports.