School of Specs 24.501v20.0.0

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

5.3.13A Forbidden PLMN lists

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

In N1 mode, two lists of forbidden PLMN are managed independently per access type, i.e. 3GPP access or non-3GPP access:

  • the list of "forbidden PLMNs" as defined in 3GPP TS 23.122 [5] is applicable for 3GPP access in N1 mode. The same list is used by 5GMM for 3GPP access, EMM, GMM and MM (see 3GPP TS 24.301 [15] and 3GPP TS 24.008 [12]), regardless whether the UE is operating in single-registration mode or dual-registration mode; and
  • the list of "forbidden PLMNs for non-3GPP access to 5GCN" as defined in 3GPP TS 24.502 [18] is applicable for 5GMM for non-3GPP access.

The list of "forbidden PLMNs for GPRS service" as defined in 3GPP TS 23.122 [5] and 3GPP TS 24.008 [12] is applicable for 3GPP access in N1 mode. The same list is used by 5GMM for 3GPP access, EMM and GMM (see 3GPP TS 24.301 [15] and 3GPP TS 24.008 [12]), regardless whether the UE is operating in single-registration mode or dual-registration mode.

The forbidden PLMN lists shall be maintained across activation and deactivation of SNPN access operation mode.

NOTE: On timer T3245 expiry when the UE supports access to an SNPN using credentials from a credentials holder using PLMN subscription, and the UE is operating in SNPN access operation mode, as an implementation option the UE can delete the list of "forbidden PLMNs", "forbidden PLMNs for non-3GPP access to 5GCN" and "forbidden PLMNs for GPRS service".