Synchronous Usage Report for Online or Offline Bearer Recalculation

The following call flow and procedure explains the Offline SDFs and Online URRs Usage Report in N4 Session Modification Request with immediate trigger.

Call Flow for Sync Usage Report
Call Flow Description for Sync Usage Report Online/Offline Bearer Recalculation
Step Description
Note
The Dynamic Offline/Online Rule is attached and an OCS or OFCS trigger ULI is locally configured under the charging profile. Modify Bearer Request with ULI change is received.

1

S-GW sends Modify Bearer Request with new ULI.

2

SMF sends Modify Bearer Response to the S-GW.

3

SMF sends N4 Session Modification Request to the UPF with Query URR for both online and offline URRs.

4

UPF sends N4 Session Modification Response for Offline SDFs and Online URRs with reporting trigger Immediate.

5

SMF sends GTPP Data Transfer Request with SDF Containers.

  • If the Offline usage report is received in the N4 Session Deletion Response, then SMF sends the GTPP Data Record Transfer Request for default with SDFs container 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 SDF level time threshold in the N4 Session Report Request, then the GTPP Data Record Transfer message does not get exchanged with OFCS.

6

SMF receives GTPP Data Record Transfer Response from OFCS.

7

SMF sends Gy CCR-U with one/multiple MSCCs for each RG+SID to the OCS.

8

SMF receives Gy CCA-I with quota, triggers for each RG+Service ID.

9

SMF sends N4 Session Modification Request with update URR-with quota for required online URRs and update URR – with bearer recalculate for offline bearer level URR.

10

UPF sends N4 Session Modification Response to the SMF.

Sample Configuration

The following is a sample message output for an Offline Bearer level URR.

URR ID: 
                Type: 81   Length: 4
                Value: 0x80000002   
            USAGE REPORT TRIGGER: 
                Type: 63   Length: 2
                Time Threshold 
            VOLUME MEASUREMENT: 
                Type: 66   Length: 25
                Total Volume: 450
                Uplink Volume: 250
                Downlink Volume: 200
            DURATION MEASUREMENT: 
                Type: 67   Length: 4
                Value: 100
            
            URR ID: 
                Type: 81   Length: 4
                Value: 0x00000021.  
            USAGE REPORT TRIGGER: 
                Type: 63   Length: 2
                Linked Usage Reporting 
            VOLUME MEASUREMENT: 
                Type: 66   Length: 25
                Total Volume: 450
                Uplink Volume: 250
                Downlink Volume: 200
            DURATION MEASUREMENT: 
                Type: 67   Length: 4
                Value: 87
                
        accessPointNameNi                    cisco.com
        ratingGroup                          10
        chargingRuleBaseName                 cisco
        resultCode                           2001
        localSequenceNumber                  1
        timeOfFirstUsage                     220822005641-0400
        timeOfLastUsage                      220822005646-0400
        timeUsage                            5
        serviceConditionChange               Time Limit
         qCI                                  5
         maxRequestedBandwithUL               0
         maxRequestedBandwithDL               0
         guaranteedBitrateUL                  0
         guaranteedBitrateDL                  0
         aRP                                  5
        servingNodeAddress                   2002::2:61
        datavolumeFBCUplink                  250
        datavolumeFBCDownlink                200
        timeOfReport                         220822005818-0400
        userLocationInformation              
         Location Type                    TAI
          MCC                                214
          MNC                                365
          TAC                                0x6789
          Location Type                    ECGI
          MCC                                214
          MNC                                365
          ECI                                0x1234567