Quota Management

The SMF requests quota from the CHF upon meeting any of the following conditions:

  • The Rating Group (RG) is installed for the first time and the charging method is Online for the dynamic rule.

  • The start of traffic trigger is initiated from the UPF for the RG in the case of static or predefined rules.

  • A specific trigger type, as defined in the 3GPP specification 32.255, is received in the usage report for the online charging service from the UPF.

The SMF uses the quota request always CLI command to request the quota always. This CLI command is available in the Charging Profile configuration mode. Upon configuring this CLI command, the SMF always requests for quota when reporting the usage to the CHF for the online services. The quota requesting ends when the charging service stops.

Irrespective of the quota request [ always | standard ] CLI configuration, the quota request is disabled for the trigger type "qht" configured through the quota suppress triggers CLI command.

If Gy is enabled for a 4G session, SMF sends the Credit Control Request-Initial (CCR-I) message with the Requested Service Unit (RSU) attribute to OCS when the send charging-initial CLI command is configured as on-receving-rule and the reqQuotaForDynRules CLI command is configured as session-start . Only if the send charging-initial is available, the CCR-I message is sent without RSU. SMF sends the CCR-I message with RSU when session report received with start of traffic, if charging-initial and reqQuotaForDynRules CLI commands are configured as traffic-start . SMF requests for Quota based on the reporting level received from PCRF or based on the local configuration available in the Charging profile, which is either RG or RG+SID.

If Gy is enabled for a 4G session, SMF uses the following CLI commands in the Charging profile:

  • send charging-initial [session-start | traffic-Start]

    Note

    The default value is session-start .

  • dynamic-rules [request-quota on-receiving-rule | start-of-traffic]

    Note

    The default value is on-receving-rule .