What is ITU?
The ITU (International Telecommunication Union) is a specialised United Nations agency responsible for coordinating global telecommunications standards, spectrum allocation, and satellite orbit assignments. Founded in 1865 as the International Telegraph Union, the ITU is the oldest international organisation still in operation. Its Radiocommunication Sector (ITU-R) defines the IMT frameworks (IMT-2000, IMT-Advanced, IMT-2020) that set the global requirements for each generation of mobile technology, directly shaping the direction of 3GPP standardization.
How Does ITU Work?
The ITU has three sectors: ITU-R (Radiocommunication, responsible for spectrum management and radio standards), ITU-T (Telecommunication Standardization, for fixed network standards), and ITU-D (Development, for bridging the digital divide). For mobile communications, ITU-R Working Party 5D defines the vision, performance requirements, and evaluation criteria for each mobile generation. The IMT-2020 framework (for 5G) specified targets including 20 Gbps peak data rate, 1 ms latency, 1 million devices/km², and 10 Mbps user experienced rate. The ITU also allocates spectrum for mobile services through World Radiocommunication Conferences (WRC), which identify frequency bands for IMT on a global and regional basis.
Use Cases
Global spectrum allocation for 5G (WRC-19, WRC-23), IMT-2020 framework definition that guided 5G NR standardization, coordination of satellite and terrestrial spectrum sharing, international harmonisation of telecommunications standards, and digital development programmes.
3GPP / Standards Reference
ITU-R M.2083 (IMT Vision — Framework and overall objectives of 5G), ITU-R M.2150 (Detailed specifications of IMT-2020 radio interfaces), ITU Radio Regulations
Related Terms
3GPP | IMT-2020 | IMT-Advanced | FR1 | FR2
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This glossary entry is part of the 5GWorldPro Complete 5G Glossary. To go deeper into 5G architecture and technology, explore our 5G Training courses.
