telecommunication systems IMT-2020 Rec. ITU-R M.1457 R1 Rec. ITU-R M.2012 Rec. ITU-R M.2020 Figure 15 Overview of timelines for IMT standards development and systems deployment [1]. The role of the ITU-R23 23 is to ensure efficient and economical use of the worldwide spec- trum by all wireless services, including maritime and satellite communications. ITU-R fur- ther allocates and regulates the radio spectrum for global deployments of wireless and radio telecommunication technologies. The vision documents published by ITU-R (e.g., recom- mendations ITU-R M.1645 [2] and ITU-R M.2083 [1]) have been used by standards devel- opment organizations as guideline to develop technologies that materialize those visions. Within ITU-R, there are several study groups that develop the technical bases for decisions taken at world radio-communication conferences and develop global standards in the form of recommendations, reports, and handbooks concerning radio telecommunication topics. The ITU-R members are typically from administrations, the telecommunications industry as a whole, and academic/research organizations throughout the world, who participate in the work of the study groups on topics such as efficient management and use of the spectrum/ orbit resources, radio systems characteristics and performance, spectrum monitoring, and emergency radio communications for public safety. Working Party 5D (WP 5D) is part of ITU-R Study Group 5 which is responsible for the overall radio system aspects of IMT sys- items. WP 5D has already finalized its views on the IMT-2020 timeline and submission ITU-R, https://www.itu.int/en/ITU-R. WP 5D-IMT Systems, https://www.itu.int/en/ITU-R/study-groups/rsg5/rwp5d Ixxvi Introduction and Background process as well as the minimum requirements and evaluation methodology for the IMT-2020 systems. The WRC charter is to constantly review and revise the worldwide spectrum regulations. The WRC decisions can impact 5G in two important aspects: (1) it can designate certain bands for mobile services, and 