How It Works
The DNN profile lookup is based on subscriber policy or DNN policy. They are associated in the SMF profile configuration. The subscriber policy has a higher precedence over the DNN policy when both the configurations are present.
The subscriber policy consists of a list of precedence values, and the selection of the precedence is based on the subscriber's SUPI, GPSI, Serving PLMN, and NSSAI value. Each precedence has an associated operator policy and the DNN policy is picked from the selected operator-policy.
The DNN policy can have a DNN profile configuration for each UE-requested DNN. The DNN profile has a Virtual or Mapped DNN with its list of interfaces.
The order of selection for a Virtual DNN is as follows:
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Based on subscriber policy, the order of selection is as follows: smf-profile > smf-service > subscriber-policy > precedence > operator-policy > dnn-policy > dnn-profile (based on UE requested DNN) > Virtual DNN mapping.
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Based on the DNN policy, the order of selection is as follows: smf-profile > dnn-policy > dnn-profile (based on UE requested DNN) > Virtual DNN mapping.
PCF, CHF, UDM, UPF, and RMGR are the supported interfaces for Virtual DNN mapping.
If the Virtual DNN mapping is not configured, the UE-requested DNN is used across all the interfaces.