Feature Description
The usage measurement and reporting function in User Plane Function (UPF) is controlled by the Session Management Function (SMF). The SMF controls these functions by:
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Creating the necessary PDRs to represent the service data flow, application, bearer or session (if they are not existing already).
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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.
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Associating the URRs to the relevant PDRs defined for the PFCP session, for usage reporting at SDF, Session or Application level.
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For online charging, the SMF provisions Volume and Time quota, if it receives it from the Online Charging Server (OCS).