Introduction

Overview

The 5G Unified Data Repository (UDR) is one of the main key component of the 5G Service Based Architecture. It is implemented as a cloud native function and offers a unified database for storing application, subscription, authentication, service authorization, policy data, session binding and Application state information. It provides a HTTP2 based RESTful interface for other NF's and provisioning clients to access the stored data.

Oracle's 5G UDR:

Leverages a common Oracle Communications Cloud Native Framework
Is compliant to 3GPP 29.505 Release 15 specification UDM
Is compliant to 3GPP 29.519 Release 16 (backward compatible with Release 15) specification for PCF
Has tiered architecture providing separation between the connectivity, business logic and data layers
Uses Oracle MySQL NDB Cluster CGE Edition as backend database in the Data Tier
Registers with NRF in the 5G network so that the other NFs in the network can discover UDR through NRF
Registers UDR with services like DR-SERVICE and GROUP-ID-MAP

As per 3GPP, UDR supports following functionality:

Storage and retrieval of subscription data by the UDM
Storage and retrieval of policy data by the PCF
Storage and retrieval of structured data for exposure
Storage and retrieval of SLF information, consumed by NRF
Application data (including Packet Flow Descriptions (PFDs) for application detection, AF request information for multiple UEs), by the NEF
Subscription and Notification feature

Unstructured Data Storage Function (UDSF) is a part of Oracle's 5G UDR solution. It supports storage and retrieval of unstructured data by any 5G NF. The specifications of UDSF are presently not defined by 3GPP.

5G SLF functionality is also a part of Oracle's 5G UDR solution. It:

Supports Nudr-groupid-map service as defined by 3GPP
Registers with NRF for Nudr-groupid-map service
Is complaint with 3GPP Release 16 for APIs to be consumed by 5G NRF
Supports REST/JSON based provisioning APIs for SLF data

Acronyms

The following table provides information about the acronyms used in the document.

Field	Description
5G-AN	5G Access Network
5GC	5G Core Network
5G-GUTI	5G Globally Unique Temporary Identifier
5GS	5G System
AMF	Access and Mobility Management Function
AUSF	Authentication Server Function
NEF	Network Exposure Function
NF	Network Function
NRF	Network Repository Function
NSI ID	Network Slice Instance Identifier
NSSAI	Network Slice Selection Assistance Information
NSSF	Network Slice Selection Function
NSSP	Network Slice Selection Policy
PCF	Policy Control Function
REST	Representational State Transfer
SEPP	Security Edge Protection Proxy
SLF	Subscriber Location Function
SMF	Session Management Function
UDM	Unified Data Management
UDR	Unified Data Repository
UDSF	Unstructured Data Storage Function

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