Updating SM Policy

This section describes the call flow of updating the SM Policy.

Update SM Policy
Update SM Policy Call Flow Description

Step

Description

1

The SMF sends an N7 Update request to the PCF.

2

The PCF sends a load session by SessionID to the CDL.

3

In response, the CDL sends the Session Record to the PCF.

4

The PCF resolves the service configuration.

5

If the charging information is not available in the PCF session, then PCF populates the session with the primary and secondary CHF address.

6

If the charging information is configured in the service, then PCF adds the charging information object in the response object.

7

If the table driven charging decision is configured in the service, then PCF queries CRD to retrieve the list of charging decision.

8

The PCF compares the result with the PCF session and identifies the delta information.

9

The PCF adds the charging decision in the response object.

10

The PCF sends the Update Session request to the CDL.

11

The CDL acknowledges the update request by sending an acknowledgment to the PCF.

12

The PCF sends an N7 Update response to the SMF.