4.2.1 Introduction

29.5143GPP5G SystemPolicy Authorization ServiceRelease 18Stage 3TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

Service operations defined for the Npcf_PolicyAuthorization Service are shown in table 4.2.1-1.

Table 4.2.1-1: Npcf_PolicyAuthorization Service Operations

Service Operation Name	Description	Initiated by
Npcf_PolicyAuthorization_Create	Determines and installs the policy according to the service information provided by an authorized NF service consumer.	NF service consumer (e.g. AF, NEF)
Npcf_PolicyAuthorization_Update	Determines and updates the policy according to the modified service information provided by an authorized NF service consumer.	NF service consumer (e.g. AF, NEF)
Npcf_PolicyAuthorization_Delete	Provides means to delete the application session context of the NF service consumer.	NF service consumer (e.g. AF, NEF)
Npcf_PolicyAuthorization_Notify	Notifies NF service consumers of the subscribed events.	PCF
Npcf_PolicyAuthorization_Subscribe	Allows NF service consumers to subscribe to the notifications of events.	NF service consumer (e.g. AF, NEF, PCF for a UE)
Npcf_PolicyAuthorization_Unsubscribe	Allows NF service consumers to unsubscribe from the notifications of events.	NF service consumer (e.g. AF, NEF, PCF for a UE)

NOTE 1: The NEF and the AF use the Npcf_PolicyAuthorization service in the same way.

NOTE 2: The PCF is the consumer when the PCF for the UE and the PCF for the PDU session are different in the Npcf_PolicyAuthorization_Notify/Subscribe/Unsubscribe operations.

NOTE 3: The NWDAF and the DCCF can be NF service consumers of the Npcf_PolicyAuthorization_Notify/Subscribe/Unsubscribe operations to perform data collection for UEs. However, there is no data collected from the PCF by the NWDAF or the DCCF defined in this Release of the specification.