Unified Data Management Functional Description

Below are the Functionalities supported by Unified Data Management (UDM), a single Instance of UDM may implement some are all Functionalities.

Generation of 3GPP AKA Authentication Credentials.

User Identification Handling like storage and management of SUPI for each subscriber in 5G.

Support of de-concealment of privacy-protected subscription identifier (SUCI)

Access authorization based on subscription data

UEs Serving NF Registration Management , storing serving AMF for UE, storing serving SMF for UEs PDU Session.

MT-SMS delivery support.

Lawful Intercept Functionality

Subscription management.

SMS management.

To provide this functionality, the UDM uses subscription data (including authentication data) that may be stored in UDR, in which case a UDM implements the application logic and does not require an internal user data storage and then several different UDMs may serve the same user in different transactions.