- Termination of RAN CP interface (N2).
- Termination of NAS (N1), NAS ciphering and integrity protection.
- Registration management.
- Connection management.
- Reachability management.
- Mobility Management.
- Lawful intercept (for AMF events and interface to LI System).
- Provide transport for SM messages between UE and SMF.
- Transparent proxy for routing SM messages.
- Access Authentication.
- Access Authorization.
- Provide transport for SMS messages between UE and SMSF.
- Security Anchor Functionality (SEAF) as specified in TS 33.501 [29].
- Location Services management for regulatory services.
- Provide transport for Location Services messages between UE and LMF as well as between RAN and LMF.
- EPS Bearer ID allocation for interworking with EPS.
- UE mobility event notification.
- Support for Control Plane CIoT 5GS Optimisation.
- Support for User Plane CIoT 5GS Optimisation.
- Support for restriction of use of Enhanced Coverage.
- Provisioning of external parameters (Expected UE Behaviour parameters or Network Configuration parameters).
- Support for Network Slice-Specific Authentication and Authorization.
- Charging data collection and support of charging interface.