5G Non-Public Networks: Standardization, Architectures and Challenges Prados Garzón, Jonathan Ameigeiras Gutiérrez, Pablo José Ordoñez Lucena, José Muñoz Luengo, Pablo Adamuz Hinojosa, Óscar Ramón Camps Mur, Daniel 5G Non-public networks (NPNs) Private 5G networks Architectures his work was supported in part by the H2020 Project 5G-CLARITY under Grant 871428, and in part by the Spanish National Project TRUE-5G under Grant PID2019-108713RB-C53. Fifth Generation (5G) is here to accelerate the digitization of economies and society, and open up innovation opportunities for verticals. A myriad of 5G-enabled use cases has been identified across disparate sectors like tourism, retail industry, and manufacturing. Many of the networks of these use cases are expected to be private networks, that is, networks intended for the exclusive use of an enterprise customer. This article provides an overview of the technical aspects in private 5G networks. We first identify the key requirements and enabling solutions for private 5G networks. Then, we review the latest 3rd Generation Partnership Project (3GPP) Release 16 capabilities to support private 5G networks. Next, we provide architecture proposals for single site private networks, including the scenario in which the radio access network (RAN) is shared. Afterwards, we address mobility and multi-site private 5G network scenarios. Finally, we identify key challenges for private 5G networks. 2021-12-02T12:30:17Z 2021-12-02T12:30:17Z 2021-11-03 info:eu-repo/semantics/article J. Prados-Garzon, P. Ameigeiras, J. Ordonez-Lucena, P. Muñoz, O. Adamuz-Hinojosa and D. Camps-Mur, "5G Non-Public Networks: Standardization, Architectures and Challenges," in IEEE Access, vol. 9, pp. 153893-153908, 2021, [doi: 10.1109/ACCESS.2021.3127482] http://hdl.handle.net/10481/71864 10.1109/ACCESS.2021.3127482 eng info:eu-repo/grantAgreement/EC/H2020/871428 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España IEEE