5G • Core Network
Nudsf Interface
UDSF Service-Based Interface
RESTful service interface exposed by UDSF allowing any 5GC NF to store unstructured runtime state data.
Technical Explanation
Exposed over HTTP/2, Nudsf provides key-value storage for transient, unstructured runtime data (e.g. active call state, temporary timers, cache). If an AMF or SMF worker pod crashes, a newly spun-up pod retrieves the session context from UDSF and resumes processing with zero downtime.
Key Functions
- Stores unstructured transient runtime session state for any 5GC NF
- Enables instant self-healing when NF microservice container crashes
- Facilitates seamless hitless software upgrades of cloud-native 5GC NFs
Specifications
3GPP TS 29.598
Interfaces
NudsfSBI
Related 5G Concepts
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