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International Telecommunications Union

The International Telecommunications Union, 150 years of history

Ever since the 17th May 1865, date on which the first telegraphic convention to manage the first international telegraphic networks was signed, the ITU has been at the centre of all communications related technological advances, from telegraph to satellites, the internet and mobile phones. 

The first international radio-telegraphic convention was held in Berlin in 1906, in particular to regulate wireless telegraphy, of which the first spectacular application was in the sea safety field. At the time, the first Radio-broadcasting Regulation (RR) only covered two wavelengths, 300 m and 600 m, used for maritime radio-communications. 

Two famous shipwrecks showed the effectiveness of marine radio:

  1. Thanks to a wireless call in 1909, 920 passengers were saved by the American coastguards when the Republic and the Florida collided.
  2. The Titanic used the SOS code for the first time in 1912: 700 people, or almost a third of the passengers, were rescued by several ships, including the Carpathia, which arrived on site one hour after the ship sank.

This conference established the “SOS” as the global marine distress signal. At the start of that century, the ITU had 29 member nations.

As a direct consequence of the First World War, the 20s experienced a high increase in both domestic and professional use of radio. It became necessary to list and organise frequency bands to improve efficiency and quality. To accompany this rapid growth, the 1927 Washington Conference resulted in the first frequency distribution table.  The frequency unit at the time was the kilocycle (it was only in 1959 that the Hertz became the frequency unit of measurement). In 1932, to better express the range of its responsibilities, the International telegraphic union became the International Telecommunications Union

In 1947, following the Atlantic City conference, the ITU became attached to the United Nations.  During this conference, which was held from 16th May to 2nd October 1947 (four and a half months), the frequency distribution table was completely revised, as the result of the progress in the uses of radio made during the Second World War and the beginning of the Cold War.   The end of the 60s marked the beginning of the first frequency assignments for space programmes (1968).

The very serious RR also provided for possible extra-terrestrial communications. Indeed, n° 5341 of RR article 5 recognises the SETI (Search for Extra-Terrestrial Intelligence programme. This American programme dating from the 60s, groups together projects of which the purpose is to detect signals an extraterrestrial life form might emit, whether deliberately or not, from its planet of origin.   The searches were located in the 1,400-1,727 MHz and 197-220 GHz bands.

Currently, the ITU has 193 member countries and some 700 private sector organisations. A long way from its first international telegraphy harmonisation works, today its actions cover the entire ICT sector, from digital broadcasting to the internet, including mobile technology and 3D television.  

To find out more:

The WRCs and the ITU-R study commissions

The ITU gathers together 193 member states. It is composed of three sectors: standardisation (ITU-T), telecommunications development (ITU-D) and radiocommunications (ITU-R). The ITU's objectives, structure, organisation and operation are governed by its constitution and its convention which are amended every four years during the plenipotentiary conferences. These two fundamental texts lay down the principles on which the Union is founded, in particular the role it is given to assign the radio spectrum frequency bands and record the uses of frequencies and orbital resources in order to avoid interference between member states.

It is the ITU-R's role to assign frequencies to radiocommunications services worldwide, coded in the Radiocommunications Regulations.

  •   The World Radiocommunications conferences (WRC) meet every three or four years to decide on the changes to be made to the Radiocommunications Regulations (RR) in order to adapt the existing framework to the spectrum needs to develop existing applications or introduce new applications. The RR splits the spectrum into frequency bands that are each assigned to one, or more generally several, radiocommunications services; the RR governs the use that these services can make of these bands.  The RR is a treaty that is binding on the public services that are members of the ITU. Each state has a national frequency plan that carries over and completes the relevant RR provisions for that State.
  •  The ITU-R study commissions, which are supervised by the radiocommunications assemblies that meet jointly with the world conferences, adopt Recommendations that tend towards a certain technical standardisation at the worldwide level. Some of these commission work groups are also in charge of preparing the items on the WRC conference agenda.
  • The Radiocommunications Regulations are the regulatory framework for the spectrum use that is applicable to all ITU member states. It is completed by a set of procedural rules which, when applicable, clarify certain obscure aspects or lift certain incoherences.

The ANFR’s action with the ITU

The Agency takes part in the preparatory works in the study commissions and in the ITU-R work groups and actions, in the CEPT groups and in the inter-regional meetings. It defends the French positions drawn up with the assignees and all the French players in the sector in question in the framework of the advisory commission for world radiocommunications conferences and the radiocommunications assembly advisory commissionn.

  • The WRCs, which last four weeks considering the number and complexity of the studies required by crowded agendas and the high economic stakes these decisions put into play, require much prior work. These are carried out within the ITU Radiocommunications sector (ITU-R) by its work and action groups, under the control of the Conference preparation meeting (CPM) which meets about six months prior to the WRC in order to finalise technical and regulatory studies in the form of a report and to identify options to fulfil the different items on the agenda. The purpose of this report is to help all ITU member states to make proposals during the Conference.
  • WRC preparation also occurs in the context of regional organisations (CEPT in Europe, CITEL for the Americas, APT for Asia-Pacific, RCC for the IEC countries, Arab League, UAT for Africa) and inter-regional organisations through exchanges between those organisations.

Comment #4G et #5G peuvent-elles coexister sur les mêmes fréquences ? C’est grâce au Dynamic Spectrum Sharing (DSS) qui permet un partage de la ressource par multiplexage temporel et de manière dynamique, pour en savoir + ⤵️

Encore une enquête très intéressante de l'@anfr. Merci pour ce partage d'expérience !

Croisons-les. J’attends maintenant que @anfr lance ses Gardiens du DAS de la Galaxie pour vérifier les émissions d’ondes des (exo)planètes, et puisse prendre des sanctions en cas de récidive ^^

L’attaque des robots : épilogue d’un mystérieux brouillage transfrontalier ! Ou comment un organisme en charge de la protection de l’environnement basé en Allemagne a récemment été victime de perturbations…

[#Newsletter] 🗞️🗞️

🆕 Découvrez notre dernière lettre d'information!


6e de la série #focus : les bandes millimétriques pour la #5G représentent le nouveau territoire du spectre pour les communications mobiles. Elles apporteront un supplément de capacité dans des zones bien identifiées, les « hot spots »

5e de la série #focus : les bandes KU, KA et la Q/V sont les bandes dédiées à la connectivité par satellite. Elles sont de + en + exploitées pour l’accès haut débit par satellite et seront essentielles pour les nouvelles constellations non géostationnaires

4e de la série #focus : la bande 6 GHz pour un accès futur en partage pour le #WiFi ou la #5G. La CMR de 2023 examinera les possibilités d’utilisation d’une partie de la bande pour la 5G en Europe, Afrique, Moyen-Orient et Asie Centrale. #CMR23

3e de la série #focus : les nouv. bandes pour le STI : 5850-5935 et 5795-5815 MHz – viennent renforcer les ressources en fréquences pour développer des systèmes de sécurité routière, le contrôle du trafic des 🚄 et de dvlpement des véhicules autonomes ⤵️

2e de la série #focus : la bande 3,5 GHz est la bande cœur pour le déploiement de la 5G en 🇪🇺. Elle commence tout juste en 🇫🇷 dans cette bande ! Les évolutions technologiques associées permettront à terme un gain en débit remarquable ⤵️

Cette semaine, l’@ANFR vous présente la série #focus sur les bandes de fréquences les plus convoitées du moment, où l’essentiel des enjeux liés aux communications sans fil sont focalisés…

L'@anfr publie ses premiers résultats concernant les mesures de #DAS « membres » réalisées sur 27 téléphones portables prélevés dans des points de vente en France. Le DAS de ces 27 téléphones est conforme à la réglementation.

[Conseils personnalisés] #Fréquences #Startups, des questions sur le fonctionnement et l’accès à certains domaines ? L'@anfr et l'@Arcep vous éclairent sur leurs réglementations spécifiques
Prenez RDV (à distance)➡️

#TousMobilisés👏 @bouyguestelecom, @orange, @SFR & @free inaugurent le premier site #4G #DCC du #NewDealMobile dans l’#Allier à Molles, avec @cedric_o, @JoelGiraud05, @Prefet03, @B_Peyrol, @LaurenceVanceu, les opérateurs et les élus locaux

#Lesaviezvous❓La gestion des fréquences radioélectriques est coordonnée au niveau🌐par l’@UIT. Depuis la 2e GM, l’essor spectaculaire de l’utilisation des fréquences rend ce travail de + en + complexe. Aujourd’hui, comment est organisé le spectre ?

L’#Allier comptait 632 sites tous opérateurs confondus au 30 septembre 2020. Parmi ces sites, 614 sites étaient équipés en #4G. Entre le 31 mars 2018 et le 30 septembre 2020, 224 nouveaux sites sont passés en 4G. #NewDealMobile
cc. @cedric_o @JoelGiraud05 @Prefet03

ANFR a Retweeté

📶 Inauguration du pylône #4G de Molles avec @JoelGiraud05.
Plan zone blanche 2003-2018 : 600 pylônes allumés. Grâce au #NewDealMobile, ce seront comme ici dans l’Allier, +2500 pylônes d'ici 2022. Un effort spectaculaire pour réduire la fracture territoriale.

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