How it Works
The User Data Repository (UDR) provisions PCF to retrieve the data stored in the UDR through the Nudr_DataRepository service. The service is also responsible for enabling the NF to subscribe and unsubscribe to the data change notifications from UDR. In particular to PCF, the Nudr_DataRepository service provides the following retrieve services to access policy control-related subscription information and application-specific information that is stored in the UDR:
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Subscription to notifications from the UDR on changes in the policy control-related subscription information.
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Subscription to the UDR for the AF requests targeting a DNN and S-NSSAI or a group of UEs (roaming UEs for LBO case) that are identified by an Internal Group Identifier.
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Subscription to notifications from the UDR on the update of AF requests targeting a DNN and S-NSSAI or a group of UEs (roaming UEs for LBO case) identified by an Internal Group Identifier.
The N36 reference point is defined for the interactions between PCF and UDR in the following reference point representation.
