 has been merged into a single entity, the SMF. This decision is related to the user-plane design in 5GC: as illustrated in Section 3.2.3, 5GC does not have distinct user-plane entities like SGW-U and PGW-U but only a generalized UPF, which can take different roles. In line with this, also the related control-plane functionality (SGW-C and PGW-C) has been generalized and merged into a single architectural entity (the SMF). The Policy Control Function (PCF) is the equivalent of EPC's Policy and Charging Rules Function (PCRF). As in EPC, either based on interactions with applications or based on triggers received from the SMF, the PCF takes policy decisions and provides PCC rules to the SMF. In contrast to the PCRF, the PCF has the additional responsibility to provide policy information to the UE (via SMF and AMF). Policy information that can be provided from PCF to UE includes the following: Access Network Discovery and Selection Policy (ANDSP): this information is used by the UE to select and register to non-3GPP access networks. 3.2 5G Core Network UE Route Selection Policy (URSP): URSP enables UEs to determine how the traffic of a given application should be routed: via a 3GPP or non-3GPP access, using an already established PDU session or using an additional, yet-to-be established PDU session. URSP also conveys to the UE additional parameters to provide to the network in case a new PDU session needs to be established including type of PDU session (e.g. IPv4, IPv6, or Ethernet), network slicing-related information (see also Section 3.2.6), and identifiers for the data network the PDU session should be established to. The Network Exposure Function (NEF) is the counterpart of EPC's SCEF as defined in 3GPP TS 23.682. NEF exposes the capabilities of network functions, that is, enables MNO or third-party applications to access 5GC network functions. External exposure supports: Monitoring capability, which allows applications to receive an indication when a UE becomes reachable; Provisioning capability to enable appl