Usage Report with SoT for Predefined and Static Rules
This section provides information on the usage report with SoT for the predefined and the static rules.

Step |
Description |
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1 |
Both PCRF and SMF exchange the Gx CCR and CCA messages from each other.
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2 and 3 |
The PFCP and GTPP message exchange happens. The SMF sends the PFCP messages to CnPGW-U and GTPP message to S-GW.
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4 |
The CnPGW-U sends the N4 Session Report Request to SMF with the SoT details. The SMF sends the N4 Session Report Response to CnPGW-U. |
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5 |
SMF sends the CCR-I message with quota request for default bearer in Gy Diameter session to OCS. This session can have one or multiple MSCCs with Requested-Service-Unit (RSU) AVP, which is one for each Rating Group and service ID. |
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6 |
OCS sends the CCA-I message in the Gy Diameter session to SMF. The Diameter session includes details, such as quota and triggers for each Rating Group and Service ID. |
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7 |
SMF sends the N4 Session Modification Request to CnPGW-U. This request includes details on the required URRs with quota. |
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8 |
The CnPGW-U sends the N4 Session Modification Response to SMF. |