5G • Services
Rejected NSSAI
Rejected Slice Set
Set of S-NSSAIs rejected by the network, with explicit rejection cause codes.
Technical Explanation
Returned in Registration Accept, the Rejected NSSAI informs the UE why requested slices could not be granted: (1) slice not available in current PLMN, (2) slice not available in current registration area, or (3) slice quota exceeded. The UE refrains from requesting rejected slices until conditions change.
Key Functions
- Identifies requested slices that were denied by operator policy or location
- Provides standardized rejection cause codes guiding device behavior
- Prevents continuous repetitive signaling for unavailable slices
Specifications
3GPP TS 23.501, TS 24.501
Interfaces
N1
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