Usage Report in N4 Modify Response (Remove URR Scenario)

This section provides details on the usage report in the N4 Modify Response for the remove URR scenario.

Usage Report in N4 Modify Response (Remove URR Scenario)
Usage Report in N4 Modify Response (Remove URR Scenario) Call Flow Description

Step

Description

1

Both the PCRF and SMF exchange the Gx CCR and CCA messages.

Note
  • The SMF receives the N4 Session Modification Request with Remove URR list from PCRF.

  • The SMF removes the Bearer or PCC Rules and the corresponding URRs.

2

The SMF sends the N4 Session Modification Request with Remove URR list to CnPGW-U.

3

The CnPGW-U sends the N4 Session Modification Response to SMF. SMF processes and identifies the usage report for each bearer.

4

If the SMF removes one or multiple PCC Rules from a bearer, the SMF sends the CCA-U or Credit Control Answer - Terminate (CCR-T) message for each bearer in different Gy Diameter sessions to OCS. These sessions can have one or multiple MSCCs with Used Service Unit (USU).

5

The OCS sends the CCA-U or CCA-T message from the corresponding Gy Diameter session without quota to SMF.