1. ITU-R. IMT Vision-Framework and overall objectives of the future development of IMT for 2020 and beyond. Recommendation ITU-R M.2083-0. https://www.itu.int/dms_pubrec/itu-r/rec/rn/R-REC-M.2083-0-201509-I!!PDF-E.pdf
2. ITU-R. Minimum requirements related to technical performance for IMT-2020 radio interface. Report ITU-R M.2410-0. https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-M.2410-2017-PDF-E.pdf
3. 3rd Generation Partnership Project. Technical Specification Group Services and System Aspects; 3GPP System Architecture Evolution (SAE); Security Architecture (Release 16). 3GPP TS 33.401 (V16.1.0). https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=2296
4. Gabriel B. Cloud RAN & the Next-Generation Mobile Network Architecture. White Paper. https://www-file.huawei.com/-/media/CORPORATE/PDF/mbb/cloud-ran-the-next-generation-mobile-network-architecture.pdf?la=en
5. 3rd Generation Partnership Project. Technical Specification Group Services and System Aspects; System Architecture for the 5G System (5GS); Stage 2 (Release 16). 3GPP TS 23.501 (V16.3.0). https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3144