Offline Bearer Usage Report
The Offline SDF or Bearer URRs are present on UPF with values like Thresholds and so on. SDF Volume/Time threshold is hit at the UPF for SDF level URRs. UPF relays usage to the SMF along with usage reporting trigger information. The following call flow and procedure describes the Offline Bearer Usage Report in N4 session report with no Bearer Recalculation.

Step | Description | ||
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1 |
UPF sends N4 Session report Request with offline Bearer along with SDF usage to the SMF. |
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2 |
SMF sends N4 Session report Response to the UPF. |
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3 |
SMF sends GTPP Data Transfer Request with SDF Containers with volume usage and serviceConditionChange—one for each RG+service ID only if the maximum charging condition is hit. If the offline usage report received is without measurement for the Bearer level time threshold in the N4 Session Report Request, then the GTPP Data Record Transfer message is sent without the SDF container with OFCS. |
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4 |
SMF receives the GTPP Data Record Transfer Response from OFCS. |
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