1 Introduction
This document provides information on how to use the Policy Control Function and configure the services.
Overview
The Policy Control Function (PCF) is a functional element for policy control decision and flows based charging control functionalities. The PCF provides the following functions:
-
Policy rules for application and service data flow detection, gating, QoS, and flow based charging to the Session Management Function (SMF)
-
Access and Mobility Management related policies to the Access and Mobility Management Function (AMF)
- Provide UE Route Selection Policies (URSP) rules to UE via AMF
The PCF supports the above functions through the following services:
- Session Management Service
- Access and Mobility Service
- Policy Authorization Service
- User Equipment (UE) Policy Service
Acronyms
Below table provides information about the acronyms used in the document.
Table 1-1 Acronyms
| Acronym | Definition |
|---|---|
| AF | Application Function |
| AMF | Access and Mobility Management Function |
| AS | Access Stratum |
| AUSF | Authentication Server Function |
| BSF | Binding Support Function |
| CP | Control Plane |
| DL | Downlink |
| DN | Data Network |
| DNAI | DN Access Identifier |
| DNN | Data Network Name |
| FQDN | Fully Qualified Domain Name |
| GFBR | Guaranteed Flow Bit Rate |
| GMLC | Gateway Mobile Location Centre |
| GPSI | Generic Public Subscription Identifier |
| NAI | Network Access Identifier |
| NEF | Network Exposure Function |
| NF | Network Function |
| NRF | Network Repository Function |
| NSI ID | Network Slice Instance Identifier |
| NSSAI | Network Slice Selection Assistance Information |
| NSSF | Network Slice Selection Function |
| NSSP | Network Slice Selection Policy |
| NWDAF | Network Data Analytics Function |
| PCF | Policy Control Function |
| QFI | QoS Flow Identifier |
| QoE | Quality of Experience |
| SBA | Service Based Architecture |
| SBI | Service Based Interface |
| SD | Slice Differentiator |
| SEPP | Security Edge Protection Proxy |
| SMF | Session Management Function |
| SMSF | Short Message Service Function |
| S-NSSAI | Single Network Slice Selection Assistance Information |
| SUPI | Subscription Permanent Identifier |
| UDM | Unified Data Management |
| UDR | Unified Data Repository |
| UDSF | Unstructured Data Storage Function |