The NEF 260 executes authentication processing and the like relating to the AF 300 disposed on an external network. Further, the NEF 260 transmits, to the AF 300, a parameter relating to the UE 200. The NEF 260 is equivalent to an SCEF 110 in
Furthermore, an N 1 is determined as a reference point between the UE 200 and the AMF 240. An N 2 is determined as a reference point between the AN 210 and the AMF 240. An N 3 is determined as a reference point between the AN 210 and the UPF 220. An N 4 is determined as a reference point between the UPF 220 and the SMF 250. An N 6 is determined as a reference point between the UPF 220 and the DN 310.
Additionally, the AUSF 230, the AMF 240, the SMF 250, the NEF 260, the NRF 270, the PCF 280, the UDM 290, and the AF 300 each determine a service-based interface. The service-based interface indicates, for example, a service, a function, or the like provided in each device.