rg (accessed May 29, 2020). References 3GPP Technical Specification 37.460 (2019). Iuant interface: General aspects and principles. Available at: www.3gpp.org (accessed May 29, 2020). 3GPP Technical Specification 37.461 (2019). Iuant interface: Layer 1. Available at: www.3gpp .org (accessed May 29, 2020). 3GPP Technical Specification 37.462 (2019). Iuant interface: Signalling transport. Available at: www.3gpp.org (accessed May 29, 2020). 3GPP Technical Specification 37.466 (2019). Iuant interface: Application part. Available at: www.3gpp.org (accessed May 29, 2020). 3GPP Technical Specification 38.413 (2019). NG-RAN; NG Application Protocol (NGAP). Available at: www.3gpp.org (accessed May 29, 2020). 3GPP Technical Specification 38.414 (2019). NG-RAN; NG data transport. Available at: WWW .3gpp.org (accessed May 29, 2020). 3GPP Technical Specification 38.415 (2019). NG-RAN; PDU Session User Plane protocol. Available at: www.3gpp.org (accessed May 29, 2020). 3GPP Technical Specification 38.424 (2019). NG-RAN; Xn data transport. Available at: WWW .3gpp.org (accessed May 29, 2020). 3GPP Technical Specification 38.425 (2019). NG-RAN; NR user plane protocol. Available at: www.3gpp.org (accessed May 29, 2020). Common Public Radio Interface (2015). CPRI Specification V7.0. Available at: www.cpri.info (accessed May 29, 2020). Common Public Radio Interface (2019). eCPRI Specification V.2. Available at: www.cpri.info (accessed May 29, 2020). ETSI(2014). Open Radio equipment Interface (ORI); Requirements for Open Radio equipment Interface (ORI) (Release 4). Available at: www.etsi.org (accessed May 29, 2020). Open Base Station Architecture Initiative (2018). OBSAI System Spec V2.0. Available at: WWW .obsai.com (accessed May 29, 2020). The Antenna Interface Standards Group (2018). AISG v3.0 base standard. Available at: http:// aisg.org.uk (accessed May 29, 2020). The Antenna Interface Standards Group (2018). Remote electrical tilt (ST-RET). Available at: http://aisg.org.uk (accessed May 29, 2020). The Antenna Interface Standard