Offline SDF 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.

Call Flow for Async Usage Report Offline Bearer Recalculate
Call Flow Description for Async Offline Bearer Usage Report witn no Bearer Recalculation
Step Description
1

UPF sends N4 Session report Request with offline SDF usage to the SMF.

2

SMF send N4 Session report Response to the UPF.

Note
When the SDF usage report is received and max charging condition is not hit, SMF does not send the CDR to the OFCS and bearer recalculation to the UPF. The max-losdv CLI value configured as 2 and only one SDF usage report is received. Once the 2nd SDF level usage is received and max charging condition is hit then CDR is sent to the GTPP and Bearer recalculation to the UPF.