5G • Core Network
Nudm Interface
UDM Service-Based Interface
RESTful service interface exposed by UDM for subscription data retrieval, authentication, and registration.
Technical Explanation
Exposed over HTTP/2, Nudm includes Nudm_SDM (Subscription Data Management - profile download for AMF/SMF), Nudm_UECM (UE Context Management - tracking serving AMF/SMF registrations), Nudm_UEAU (UE Authentication - generating 5G-AKA vectors), and Nudm_PP (Parameter Provisioning).
Key Functions
- Delivers subscriber profiles and authorized slices to AMF and SMF
- Generates 5G-AKA authentication vectors via embedded ARPF/SIDF
- Tracks serving network function registrations for call routing
Specifications
3GPP TS 29.503
Interfaces
NudmSBI
Related 5G Concepts
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