School of Specs 23.501v20.2.0

3GPP 23.501 v20.2.0 — the document's own text

6.2.11 UDR

Taught in 4. What each network function does (The 5G system architecture, in depth), 2. Who does what in the core (The 5G system architecture, overview).

The Unified Data Repository (UDR) supports the following functionality:

  • Storage and retrieval of subscription data by the UDM.
  • Storage and retrieval of Ambient IoT data, as defined in clause 4.5.8 of TS 23.369 [220], by the ADM.
  • Storage and retrieval of policy data by the PCF.
  • Storage and retrieval of structured data for exposure.
  • Application data (including Packet Flow Descriptions (PFDs) for application detection, AF request information for multiple UEs, 5G-VN group information for 5G-VN management, Non-3GPP Device Identifier Information).
  • Storage and retrieval of NF Group ID corresponding to subscriber identifier (e.g. IMPI, IMPU, SUPI).

The Unified Data Repository is located in the same PLMN or in the same network as the NF service consumers storing in and retrieving data from it using Nudr. Nudr is an intra-PLMN interface.

NOTE 1: Deployments can choose to collocate UDR with UDSF.