School of Specs 24.501v20.0.0

3GPP 24.501 v20.0.0 — the document's own text

5.3.12A.1 General

Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).

The requirements in clause 5.3.12 with the clarifications and additional conditions in clause 5.3.12A apply to a UE supporting:

  • attach procedures (see 3GPP TS 24.301 [15]) or registration procedures via 3GPP access; and
  • registration procedures via non-3GPP access.

The UE shall ignore the presence or absence of local emergency numbers list, extended local emergency numbers list or both, in a REGISTRATION ACCEPT message received via non-3GPP access and keep the stored local emergency numbers list and the extended local emergency numbers list, if available, unless conditions in clause 5.3.12A.2 are met.

For the purposes of clause 5.3.12A, the UE is considered neither registered nor attached over 3GPP access if:

  • the UE supports 3GPP access to EPC, the UE does not support 3GPP access to 5GC, and:
    • the EMM sublayer is in the EMM-NULL state, EMM-DEREGISTERED state or EMM-DEREGISTERED-INITIATED state; or
  • the UE supports 3GPP access to 5GC, the UE does not support 3GPP access to EPC, and:
    • the 5GMM sublayer is in the 5GMM-NULL state, 5GMM-DEREGISTERED state or 5GMM-DEREGISTERED-INITIATED state; or
  • supports both 3GPP access to EPC and 3GPP access to 5GC, and:
    • the EMM sublayer is in the EMM-NULL state, EMM-DEREGISTERED state or EMM-DEREGISTERED-INITIATED state; and
    • the 5GMM sublayer is in the 5GMM-NULL state, 5GMM-DEREGISTERED state or 5GMM-DEREGISTERED-INITIATED state.