Now, a configuration example of a communication system according to Example Embodiment 4 is described by using FIG. 8. The communication system in FIG. 8 refers to 3GPP TS 23.501 V 0.5.0 (2017-05) FIG. 4.2.3_1, and mainly illustrates a configuration of 5G core (5GC). The communication system in FIG. 8 includes UE 200, an access network (AN) 210, a user plane function (UPF) entity 220 (hereinafter, referred to as a UPF 220), an authentication server function (AUSF) 230, an access and mobility management function (AMF) entity 240 (hereinafter, referred to as an AMF 240), a session management function (SMF) entity 250 (hereinafter, referred to as an SMF 250), a network exposure function (NEF) entity 260 (hereinafter, referred to as an NEF 260), a network repository function or network functions repository function (NRF) entity 270 (hereinafter, referred to as an NRF 270), a policy control function (PCF) entity 280 (hereinafter, referred to as a PCF 280), a unified data management (UDM) 290, an application function (AF) entity 300 (hereinafter, referred to as an AF 300), and a data network (DN) 310. The AN 210 may be indicated as a (radio (R)) AN 210.

The UE 200 is equivalent to UE 60 in FIG. 2. The AN 210 includes a base station or the like communicating with the UE 200. The AN 210 may perform wireless communication or wired communication with the UE 200. The base station or the like included in the AN 210 is equivalent to an eNB 70 in FIG. 2.