Section: 4.2.2 Network Functions and entities
Content: The 5G System architecture consists of the following network functions (NF): - Authentication Server Function (AUSF). - Access and Mobility Management Function (AMF). - Data Network (DN), e.g. operator services, Internet access or 3rd party services. - Unstructured Data Storage Function (UDSF). - Network Exposure Function (NEF). - Network Repository Function (NRF). - Network Slice Admission Control Function (NSACF). - Network Slice-specific and SNPN Authentication and Authorization Function (NSSAAF). - Network Slice Selection Function (NSSF). - Policy Control Function (PCF). - Session Management Function (SMF). - Unified Data Management (UDM). - Unified Data Repository (UDR). - User Plane Function (UPF). - UE radio Capability Management Function (UCMF). - Application Function (AF). - User Equipment (UE). - (Radio) Access Network ((R)AN). - 5G-Equipment Identity Register (5G-EIR). - Network Data Analytics Function (NWDAF). - CHarging Function (CHF). - Time Sensitive Networking AF (TSN AF). - Time Sensitive Communication and Time Synchronization Function (TSCTSF). - Data Collection Coordination Function (DCCF). - Analytics Data Repository Function (ADRF). - Messaging Framework Adaptor Function (MFAF). - Non-Seamless WLAN Offload Function (NSWOF). NOTE: The functionalities provided by DCCF and/or ADRF can also be hosted by an NWDAF. - Edge Application Server Discovery Function (EASDF). The 5G System architecture also comprises the following network entities: - Service Communication Proxy (SCP). - Security Edge Protection Proxy (SEPP). The functional descriptions of these Network Functions and entities are specified in clause 6. - Non-3GPP InterWorking Function (N3IWF). - Trusted Non-3GPP Gateway Function (TNGF). - Wireline Access Gateway Function (W-AGF). - Trusted WLAN Interworking Function (TWIF).