SM Policy Subscription Call Flow

This section describes the SM Policy Subscription call flow.

SM Policy Subscription Call Flow
SM Policy Subscription Call Flow Description

Step

Description

1

The SMF sends a Npcf_SmPolicyControl_Create request to the PCF.

2

If the UDR URL is not configured, the PCF sends the Nnrf_NFDiscovery request to NRF.

3

In response, the NRF sends the Nnrf_NFDiscovery results to the PCF.

4

The PCF sends the Nudr_DataRespository query to the UDR.

5

In response, the UDR sends the repository details to the PCF.

6

The PCF sends the Npcf_SmPolicyControl_Create request to the SMF.

7

The PCF sends the Nudr_DataRepository query to the UDR.

8

The UDR responds to PCF with the repository information.

9

After PCF evaluates the response, if the policy has modified, then the PCF sends the Npcf_SmPolicyControl_UpdateNotify request to the SMF.

10

The SMF sends the Update Notification as a response to the PCF.