Section: 5.3.14A List of equivalent SNPNs
Content: The UE may support equivalent SNPNs. If the UE supports equivalent SNPNs, the ME shall store a list of equivalent SNPNs: - per entry of "list of subscriber data"; or - per the PLMN subscription, if the UE supports access to an SNPN using credentials from a credentials holder. SNPNs in the list of equivalent SNPNs associated with the selected entry of "list of subscriber data" or the selected PLMN subscription shall be regarded by the UE as equivalent to each other for SNPN selection, cell selection and cell re-selection. The list of equivalent SNPNs associated with the selected entry of "list of subscriber data" or the selected PLMN subscription is created, replaced or deleted at the end of each registration procedure. The stored list consists of a list of equivalent SNPNs as provided by the network plus the SNPN identity of the registered SNPN that provided the list. When the UE is switched off, the UE shall keep the stored list(s) so that they can be used for SNPN selection after switch on. The UE shall delete the stored list associated with an entry of "list of subscriber data" or the PLMN subscription, when the USIM is removed, the associated entry of "list of subscriber data" is updated, or the UE registered for emergency services enters the state 5GMM-DEREGISTERED. The maximum number of possible entries in each stored list is 16. NOTE 1: To enable UE mobility between the registered SNPN and an equivalent SNPN, the SNPN identity of the registered SNPN providing a list of equivalent SNPNs and the SNPN identity(ies) in the list of equivalent SNPNs are assumed to be globally-unique SNPN identities. NOTE 2: The MS can provide the list of equivalent SNPNs associated with the selected entry of "list of subscriber data" or the selected PLMN subscription to the lower layers. If the UE supports equivalent SNPNs and registers to different SNPNs over 3GPP and non-3GPP accesses, the UE shall store an additional list of equivalent SNPNs associated with non-3GPP access. The UE manages the two lists of equivalent SNPNs per access type independently.