.. SPDX-FileCopyrightText: © 2020 Open Networking Foundation SPDX-License-Identifier: Apache-2.0 Glossary ======== Protocols --------- - NGAP: NG Application Protocol used over N2 interface - S1AP: S1 Application Protocol used over S1-AP interface - Diameter: S6a, Gx interface - NAS: Non-Access-Stratum used between UE & MME/AMF. - PFCP: Packet Forwarding Control Protocol - GTPU: GTP user plane protocol. Used on s1-U, s5-U, N3, N9 interfaces - GTPv2: GTP control plane protocol used on s11 interface between MME & SGW Network Functions ----------------- - AMF: Access and Mobility Management Function - UPF: User Plane Function - SMF: Session Management Function - NRF: Network Repository Function - NSSF: Network Slice Selection Function - PCF: Policy & Charging Function - AUSF: Authentication Server Function - UDM: Unified Data Management - UDR: Unified Data Repository - CHF: Charging Function - NWDAF: Network Data Analytics Function - NEF: Network Exposure Function - MME: Mobility Management Entity - SGW: Serving Gateway - PGW: PDN Gateway - HSS: Home Subscriber Server - PCRF: Policy and Charging Rule Function 3gpp Interfaces --------------- - N2: gNodeB to AMF interface - N4: SMF to UPF interface - SBI interface - S1AP: eNodeB to MME interface Misc ---- SA: Standalone Architecture URLLC : Ultra Reliable Low Latency Communication