How It Works
The DNN profile lookup is based on subscriber policy or DNN policy. You can associate these policies in the SMF profile configuration. The subscriber policy has a higher precedence over the DNN policy when both the configurations are available.
The subscriber policy consists of a list of precedence values. The selection of precedence is based on various values. For example, the subscriber SUPI, GPSI, Serving PLMN, NSSAI, Charging Characteristics, and IMSI. Each precedence has an associated operator policy and the DNN policy is chosen 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 Resource Manager (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.