SMF-triggered Metadata for EDR Generation on UPF
The SMF provides the following metadata to the User Plane Function (UPF) to enable EDR generation.
Called-Station-ID: Specifies the DNN for the session
Calling-Station-ID: Specifies the MSISDN of the UE
RAT Type: RAT type for the current session (NR or EUTRAN)
ULI: User location for the current session
The UPF receives preceding data in the "Subscriber Parameters" IE in the PFCP Session Establishment Request message. The RAT type and ULI can change during the lifetime of session (for events, such as 5G to 4G handover). The UPF receives the changed values of these parameters in the PFCP Session Modification Request message.
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For more information on the UPF EDRs, see the UCC 5G UPF Configuration and Administration Guide.