Section: 6.25.2 Requirements
Content: The 5G system shall support non-public networks. The 5G system shall support non-public networks that provide coverage within a specific geographic area. The 5G system shall support both physical and virtual non-public networks. The 5G system shall support standalone operation of a non-public network, i.e. a non-public network may be able to operate without dependency on a PLMN. Subject to an agreement between the operators and service providers, operator policies and the regional or national regulatory requirements, the 5G system shall support for non-public network subscribers: - access to subscribed PLMN services via the non-public network; - seamless service continuity for subscribed PLMN services between a non-public network and a PLMN; - access to selected non-public network services via a PLMN; - seamless service continuity for non-public network services between a non-public network and a PLMN. Subject to an agreement between the operators and service providers, operator policies and the regional or national regulatory requirements, the 5G system shall enable a UE, with multiple subscriptions, to simultaneously access multiple non-public networks and corresponding services, via those NPNs or via a different network (PLMN or NPN). Subject to regional or national regulatory requirements for emergency services, 5G system shall be able to support IMS emergency services for non-public networks. A non-public network subscriber to access a PLMN service shall have a service subscription using 3GPP identifiers and credentials provided or accepted by a PLMN. The 5G system shall support a mechanism for a UE to identify and select a non-public network. NOTE: Different network selection mechanisms may be used for physical vs virtual non-public networks. The 5G system shall support identifiers for a large number of non-public networks to minimize collision likelihood between assigned identifiers. The 5G system shall support a mechanism to prevent a UE with a subscription to a non-public network from automatically selecting and attaching to a PLMN or non-public network it is not authorized to select. The 5G system shall support a mechanism to prevent a UE with a subscription to a PLMN from automatically selecting and attaching to a non-public network it is not authorized to select. The 5G system shall support a mechanism for a PLMN to control whether a user of a UE can manually select a non-public network hosted by this PLMN that the UE is not authorized to select automatically. The 5G system may broadcast a human readable network name that a UE may display for manual selection of a non-public network. The 5G system shall support a change of host of a non-public network from one PLMN to another PLMN without changing the network selection information stored in the UEs of the non-public network. The 5G system shall enable an NPN to support multiple third-party service providers. In the event of a loss of communication between RAN and core network, the 5G system shall be able to provide capability to securely re-connect an NPN network function within a short period of time (< 1s).