Traffic Usage Reporting (Charging)

The usage measurement and reporting function in UPF is controlled by the SMF. The SMF controls these functions by:

  • Creating the necessary PDRs to represent the service data flow, application, bearer or session (if they are not existing already).

  • Creating the URRs for each Charging Key and combination of Charging Key and Service ID. Also, creating URRs for a combination of Charging Key, Sponsor ID, and Application Service Provider ID.

    Please note that, for static rules, the UPF creates the URR ID. The URR ID is created based on the online/offline and Content ID+Service ID combination that is configured on UPF.

  • Associating the URRs to the relevant PDRs defined for the PFCP session, for usage reporting at SDF, Session or Application level.

  • For online charging, the SMF provisions Volume and Time quota, if it receives it from the Online Charging Server (OCS).

The Charging Support feature is related to this use case.