3GPP Documentation
Table of contents
- 5G Core Network
- Architecture
- Reference Points
- Services
- Network Functions and entities
- AMF (Access and Mobility Management Function)
- AUSF (Authentication Server Function)
- BSF (Binding Support Function)
- CHF (Charging Function)
- NEF (Network Exposure Function)
- NRF (NF Repository Function)
- NWDAF (Network Data Analytics Function)
- PCF (Policy Control Function)
- SMF (Session Management Function)
- UDR (Unified Data Repository)
- Policy and Charging Control
5G Core Network
- TS 23.501 - System Architecture for the 5G System
- TS 23.502 - Procedures for the 5G System (5GS)
- TS 23.503 - Policy and Charging Control Framework for the 5G System
- TS 29.501 - Principles and Guidelines for Services Definition
- TS 29.571 - Common Data Types for Service Based Interfaces
- TS 33.501 - Security architecture and procedures for 5G System
Common APIs
Architecture
5G System architecture
PCF/CHF Interfaces
Reference points
| Interface | Description |
|---|---|
| N1 | Reference point between the UE and the AMF |
| N2 | Reference point between the (R)AN and the AMF |
| N3 | Reference point between the (R)AN and the UPF |
| N4 | Reference point between the SMF and the UPF |
| N5 | Reference point between the PCF and an AF |
| N6 | Reference point between the UPF and a Data Network |
| N7 | Reference point between the SMF and the PCF |
| N8 | Reference point between the UDM and the AMF |
| N9 | Reference point between two UPFs |
| N10 | Reference point between the UDM and the SMF |
| N11 | Reference point between the AMF and the SMF |
| N12 | Reference point between AMF and AUSF |
| N13 | Reference point between the UDM and Authentication Server function the AUSF |
| N14 | Reference point between two AMFs |
| N15 | Reference point between the PCF and the AMF in the case of non-roaming scenario, PCF in the visited network and AMF in the case of roaming scenario |
| N16 | Reference point between two SMFs (in roaming case between SMF in the visited network and the SMF in the home network) |
| N17 | Reference point between AMF and 5G-EIR |
| N18 | Reference point between any NF and UDSF |
| N22 | Reference point between AMF and NSSF |
| N23 | Reference point between PCF and NWDAF |
| N24 | Reference point between the PCF in the visited network and the PCF in the home network |
| N27 | Reference point between NRF in the visited network and the NRF in the home network |
| N28 | Reference point between PCF and OCS |
| N31 | Reference point between the NSSF in the visited network and the NSSF in the home network |
| N32 | Reference point between SEPP in the visited network and the SEPP in the home network |
| N33 | Reference point between NEF and AF |
| N34 | Reference point between NSSF and NWDAF |
| N35 | Reference point between UDM and UDR |
| N36 | Reference point between PCF and UDR |
| N37 | Reference point between NEF and UDR |
| N40 | Reference point between SMF and the CHF |
| N50 | Reference point between AMF and the CBCF |
Services
Network Functions and entities
AMF (Access and Mobility Management Function)
APIs
AUSF (Authentication Server Function)
APIs
BSF (Binding Support Function)
CHF (Charging Function)
- TS 29.594 - Spending Limit Control Service
- TS 32.240 - Telecommunication management; Charging management; Charging architecture and principles
- TS 32.255 - Telecommunication management; Charging management; 5G data connectivity domain charging; Stage 2
- TS 32.290 - Telecommunication management; Charging management; 5G system; Services, operations and procedures of charging using Service Based Interface (SBI)
- TS 32.291 - 5G system, charging service; Stage 3
NEF (Network Exposure Function)
APIs
NRF (NF Repository Function)
NWDAF (Network Data Analytics Function)
PCF (Policy Control Function)
- TS 29.244 - Interface between the Control Plane and the User Plane nodes
- TS 29.507 - Access and Mobility Policy Control Service
- TS 29.512 - Session Management Policy Control Service
- TS 29.513 - Policy and Charging Control signalling flows and QoS parameter mapping
- TS 29.514 - Policy Authorization Service
- TS 29.523 - Policy Control Event Exposure Service
- TS 29.525 - UE Policy Control Service
- TS 29.554 - Background Data Transfer Policy Control Service
- TS 29.594 - Spending Limit Control Service
SMF (Session Management Function)
APIs
UDR (Unified Data Repository)
- TS 29.504 - Unified Data Repository Services
- TS 29.519 - Usage of the Unified Data Repository service for Policy Data, Application Data and Structured Data for Exposure
APIs
- Data Repository
Policy and Charging Control
OCS (Online Charging System)
- TS 29.219 - Policy and charging control: Spending limit reporting over Sy reference point
- TS 32.240 - Telecommunication management; Charging management; Charging architecture and principles
- TS 32.260 - IP Multimedia Subsystem (IMS) charging
- TS 32.270 - Multimedia Messaging Service (MMS) charging
- TS 32.274 - Short Message Service (SMS) charging
- TS 32.276 - Voice Call Service (VCS) charging
- TS 32.296 - Telecommunication management; Charging management; Online Charging System (OCS): Applications and interfaces
- TS 32.299 - Diameter charging applications
PCRF (Policy and Charging Rule Function)
- TS 29.211 - Rx Interface and Rx-Gx signalling flows
- TS 29.213 - Policy and charging control signalling flows and Quality of Service (QoS) parameter mapping
- TS 23.380 - IMS Restoration Procedures