5G NR Data Storage architecture

5G NR Data Storage architecture.

NOTE 1: Structured data in this specification refers to a information of structure which is defined in 3GPP specifications. 
NOTE 2: Unstructured data refers to information of structure which is not defined in 3GPP specifications.
NOTE 3: 3GPP will specify  only (possibly referencing by) the N18/Nudsf interface.

Data Storage Structure of UDF

In 5G System architecture the UDM, PCF and NEF are using to store information's in UDR, like subscription info or policy info. By using UDM and PCF, structured data of application data (inclusive of Packet Flow Descriptions (PFDs) software detection, A.F. request info data can be use by more than one UEs) via the NEF. 
UDR can be deployed in each PLMN and it can serve exclusive functions as follows:

• UDR accessed by the NEF belongs to the similar  PLMN wherein the NEF is positioned.
• UDR accessed by the UDM belongs to the similar PLMN where the UDM is positioned if UDM supports a split architecture.
• UDR accessed by the PCF belongs to the similar PLMN wherein the PCF is positioned.

NOTE 3: The UDR deployed in each PLMN can keep store application records for roaming subscribers.

NOTE 4:There may be multiple UDRs deployed in the network, each of that can accommodate different records sets or subsets, (e.G. Subscription info data, subscription policy records, data for exposure, application data) and/or serve exceptional sets of NFs. Deployments wherein a UDR serves a single NF and stores its data, and, thus, can be incorporated with this NF.

NOTE 5: The internal structure of the UDR in discern is shown for information only.