Section: 16.7 Public Network Integrated NPN 16.7.1 General
Content: A PNI-NPN is a network deployed for non-public use which relies on network functions provided by a PLMN (see clause 4.8). In PNI-NPN, a Closed Access Groups (CAG) identifies a group of subscribers who are permitted to access one or more CAG cells associated to the CAG. A CAG is identified by a CAG identifier broadcast in SIB1. A CAG-capable UE can be configured with the following per PLMN (see clause 5.30.3.3 of TS 23.501[ System architecture for the 5G System (5GS) ]  [3]): - an Allowed CAG list containing the CAG identifiers which the UE is allowed to access; and - a CAG-only indication if the UE is only allowed to access 5GS via CAG cells. Dual Connectivity is supported and may involve both PNI-NPN and PLMN cells, according to the mobility restrictions in the UE context as described in TS 37.340[ Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Overall Description; Stage-2 ]  [21].