.501, Release 15, 2016. https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3144 "UTRAN overall description." 3GPP, 25.401, Release 1999. https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1184 Common Public Radio Interface: http://www.cpri.info Dahlman, E., Parkvall, S. and J. Skold 4G: LTE-Advanced Pro and The Road to 5G, 3rd Edition. Academic Press, 2016. 5G: 5G NR: The Next Generation Wireless Access Technology, 1st Edition. Academic Press, 2018. Global System for Mobile Communications Association (GSMA): https://www.gsma.com/ NGMA: https://www.ngmn.org/ O-RAN Alliance Specifications: https://www.o-ran.org/specifications Chapter 11 ITU: https://www.itu.int Resilient Navigation and Timing Foundation: https://mtfnd.org/ MEF, Carrier Ethernet for 5G: https://www.mef.net/service-standards/additional-mef-domains/5g Chapter 12 Calnex Solutions: https://www.calnexsol.com/ Calnex Solutions, Technical Library: https://www.calnexsol.com/en/solutions-en/education/techlib/timing-and- sync-lab Cisco MIB, repository of Cisco SNMP MIB definitions: ftp://ftp.cisco.com/pub/mibs/v2/ Cisco YANG, repository Cisco models: https://github.com/YangModels/yang/tree/master/vendor/cisco IEEE Standards Association "IEEE Approved Draft Standard for Local and Metropolitan Area Networks - Timing and Synchronization for Time-Sensitive Applications, Amendment: YANG Data Model." IEEE P802.1ASdn, Amendment to IEEE Standard 802.1AS-2020, 2020. https://www.ieee802.org/1/files/public/docs2020/dn-draft-PAR- 0520-v01.pdf "Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Amendment: MIB and YANG Data Models." IEEE P1588e, Amendment to IEEE Standard 1588-2019, 2020. https://standards.ieee.org/project/1588e.html Abbreviations absolute time error in radio equipment 1 GE, 10 GE 1-gigabit Ethernet, 10-gigabit Ethernet 1000BASE-T gigabit Ethernet over copper wiring (802.3ab) one-way delay measurement 1st generation 