The service-based interface determined in the AUSF 230 is represented as Nausf. The service-based interface determined in the AMF 240 is represented as Namf. The service-based interface determined in the SMF 250 is represented as Nsmf. The service-based interface determined in the NEF 260 is represented as Nnef. The service-based interface determined in the NRF 270 is represented as Nnrf. The service-based interface determined in the PCF 280 is represented as Npcf. The service-based interface determined in the UDM 290 is represented as Nudm. The service-based interface determined in the AF 300 is represented as Naf.
Now, flow of processing of sending information relating to a transmission data amount according to Example Embodiment 4 is described by using