5G • Services
NSSAI
Network Slice Selection Assistance Information
Collection of up to eight S-NSSAIs signaled between UE and network during registration and session setup.
Technical Explanation
NSSAI is a set of S-NSSAIs representing the slice portfolio of a device. A UE can register for up to 8 slices simultaneously. Categories include Configured NSSAI (provisioned in SIM/device), Requested NSSAI (demanded by UE at attach), and Allowed NSSAI (authorized by NSSF for the current location).
Key Functions
- Aggregates up to eight distinct S-NSSAIs for a single terminal
- Classified into Configured, Requested, Allowed, and Rejected NSSAIs
- Enables concurrent multi-slice connectivity (e.g. voice + enterprise + gaming)
Specifications
3GPP TS 23.501, TS 24.501
Interfaces
N1N22
Related 5G Concepts
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