retour en haut

Licensed Shared Access (LSA)

 

 

Towards more dynamic spectrum sharing: /Licensed Shared Access

 

 

 

France wishes to keep an option that leaves space for high speed security network communications (“PPDR”), because the band seems specially suitable for personal portable devices.  Several possibilities are under study, of which some could be combined with the use of additional frequency blocks to provide downwards capacity to commercial networks (SDL technology, “supplemental downward link”). The other options under study at the European level are wireless microphones that currently use blank television space in the 470-790 MHz band and the commercial networks for M2M applications.   

Border coordination

In France, the perspective of the assignment of the band to mobile operators starting from 2015 brought the Agency, supported by the countries with the same ambitions such as Germany, to launch thought processes aiming to revise the border agreements with neighbouring countries in order to be able to transfer television below 694 MHz in the calendars being considered.  

When the 800 MHz band was reassigned, these negotiations took over three years. If the geography of our borders with Italy and Spain make coordination easier, the situation is much more complicated in northern France considering the number of countries involved (Belgium, Luxembourg, Netherlands, Germany, United Kingdom) and a more unfavourable topography encouraging long distance radio routes. 

The informal WEDDIP group (Western Europe Digital Dividend Implementation Group) that gathers together these countries now has a key role in preparing the scenarios for the fast migration of television out of the 700 MHz band. An inventory has been made: all the WEDDIP administrations, except for Switzerland, now want to sign most of the required agreements by 2016. 

The next step will be to propose concrete solutions to our neighbours based on the national frequency plan drawn up by the CSA. Transitory plans will probably also be implemented to take into account the calendar to free up the 700 MHz band which will remain specific to each of our neighbours. 


Other possible uses of the 700 band 

At this stage, harmonisation is limited to the 2x30 MHz blocks, leaving 36 MHz of spectrum available for other applications. Currently the CEPT is looking into several options: wireless microphones, security networks (PPDR), additional mobile component (communication to mobile terminals or SDL), machine to machine communications (or M2M) that could be chosen by each country depending on its own needs as part of bespoke “national” harmonisation (figure 1). The work will continue until the summer of 2015. 

700 MHz band channelling and the “national” options being studied

The major increase in mobile traffic is certain: from now until 2030 the most conservative forecasts show traffic multiplied by 30 and the least conservative by 300. Therefore, it is probable that new spectrum needs will appear.

In order to fulfil this demand, the State can, as it has done until now, release new frequency bands and exclusively assign them to very high speed mobile. Considering the increasing cost of this method, it must be combined with new spectrum management modes, in particular the use of dynamic frequency band sharing. 

The possibility of sharing frequency bands already exists: for example, the regulator can issue separate, static licences for separate geographical zones. Open frequencies, such as Wifi, are usually shared by type. However, between these two extremes, dynamic frequency sharing mechanisms can also be designed. This is how the LSA (Licensed Shared Access) appeared. The RSPG defined it in its November 2013 opinion: to facilitate the introduction of radiocommunications systems operated by a limited number of licence holders (“licensees”), the LSA allows them to use a band that has already been assigned “under an exclusive licence scheme” to one or more initial users (“incumbents”). In brief, new users are assigned authorisations on frequencies that remain assigned to someone else, subject to the explicit condition of not creating interference for them: the new arrival must comply with the precise rules that guarantee that the initial occupant’s services are not deteriorated. 

This peaceful coexistence can be adjusted over time. The LSA can, in fact, be implemented dynamically: for example, using a geolocated database, the holders of an LSA authorisation will only use the band in the areas that will not interfere with the initial user. Limitations can also be in time and modulate station power. The originality of the LSA is in the fact that these restrictions must first be accurately defined by the administrations and recorded in written form.  The services previously deployed in the band thus obtain guarantees as to their operational continuity, whereas the new arrivals have sufficient legal security to justify their investments in the band.  

In Europe, the 2.3 GHz band quickly became the main candidate band for LSA experimentation as the RSPG had underlined in its 2013 opinion on wireless high speed. This is a band that had already been identified in 2007 in the radiocommunications regulations for possible use by mobile systems benefiting from standardisation (3GPP). LTE TDD equipment therefore exists for this range of frequencies. It is already used as an exclusive LTE TDD mobile band, in particular in Australia, Hong King, India, Russia, South Africa or China. Since 2013, a CEPT work group (FM52) chaired by the ANFR has been studying the implementation of the LSA in the 2.3 GHz band and an ECC decision in the same vein was adopted in 2014. The ETSI has developed an SRD (System Reference Document) for mobile services using the LSA in the 2.3 GHz band to supplement the CEPT initiatives.. 

In France, this band is currently used by the Ministry of Defence for certain applications, in particular remote aeronautical measurements. The transfer of these applications to another frequency band in the near future cannot be envisaged. The ARCEP also uses the 2,290 2,310 MHz band for video reporting links. These two types of use are specific in that they do not cover the entire territory and are not permanent. Prior studies have been started at the national level under the ANFR’s control to contribute to European work.  

Currently, French businesses such as Alcatel-Lucent alongside start-ups such as Red Technologies are at the cutting edge of LSA. The French public authorities support this innovating regulatory solution which has also been the subject of preparatory European work.  

Sharing this band would make it possible for the Ministry of Defence to carry on using it wherever it is essential to its activities and where it cannot be freed up at a reasonable cost. The LSA approach applied to this band would then provide mobile operators additional capacity for very high speed services on most of the territory. 

The implementation of the LSA system approach will require the regulator to precisely define the conditions for sharing and coordination of the initial and additional uses, by completing the conditions defined in the ECC decision. 

Following the proposals by the ministerial report “A dynamic spectrum management for innovation and growth” by Joêlle Toledano, the work of the Agency’s Electromagnetic compatibility commission (CCE) has made it possible to look deeper into the compatibility between the different envisaged uses for the 2.3 GHz band. At the request of the minister Axel Lemaire, the National frequency agency, in collaboration with the ARCEP, the Business department and the Ministry of Defence, will now indicate the technical conditions that would make it possible to initiate experimentation of the LSA in this band. This initiative will open up the route to a more dense spectrum use while increasing capacity open to mobile high speed.

Quel est le point commun entre le Global Citizen live, le sommet Afrique-France et le Qatar Prix Arc de Triomphe? Ils ont tous fait appel à l'@anfr pour planifier les fréquences temporaires nécessaires à ces événements et garantir l'absence de brouillage ! https://t.co/SSi16zxadb https://t.co/CWZngdFLpQ

🛰️ Dans ce 4eme et dernier épisode de la revue scientifique de l'@anfr sur la recherche spatiale et les communications avec Mars, découvrez comment se font les communications entre la planète rouge et la Terre
🪐 https://t.co/j6a3reUXh1 https://t.co/0E2UapcIsK

L’@anfr vous présente sa nouvelle brochure pédagogique « Tout comprendre sur la mesure d’exposition aux ondes ». Comment se déroule une mesure ? Que mesure-t-on ? Quelles conclusions tirer des niveaux mesurés ? A télécharger ici : ⤵️
https://t.co/u045ebi6mp https://t.co/fsPrn7Qc47

Participez au 4e atelier des #fréquences de l’@anfr « Le partage du spectre, où en sommes-nous ? Comment changer de paradigme ? ». Cet atelier sera l’occasion de faire un état des lieux et d’identifier les actions pour encourager le partage. https://t.co/9FzpDpqCa1 https://t.co/6vkZaKjFFU

Le #RSPG met en consultation son programme de travail pour 2022-2023 Principaux thèmes : #6G , #UHF, extinction #2G et #3G, CMR-23, lutte contre le changement climatique, coordination aux frontières et revue des pairs⤵️
https://t.co/h8oigVG0uG https://t.co/4Pfyr3Oavt

Les résultats de la consultation publique du RSPG sur les politiques du spectre pour répondre aux défis du changement climatique sont désormais disponibles. Prochaine étape : des recommandations du groupe d’experts à la @EU_Commission. Pour en savoir + :
https://t.co/vKnVCxNb3Y https://t.co/4NcF37Am30

Félicitations à Eric Fournier, directeur des affaires internationales à l’@anfr, nouveau président à partir du Ier/01/22 du Radio Spectrum Policy Group (RSPG), le groupe consultatif
européen qui assiste la Commission européenne sur la politique du spectre des #fréquences. https://t.co/ABLfUSMlyy

#recrutement 💼

L'@anfr recrute :
▶️ Un(e) technicien(ne) en radiofréquences au département " contrôle de conformité "

📍Donges

🆕 https://t.co/sqP2CMTHoy https://t.co/jO0AeYDrg1

Vous souhaitez savoir si la 5G est bien reçue par votre smartphone sur un parcours donné ? L’appli #Openbarres de l'@anfr permet désormais cette fonctionnalité avec l’affichage et l’enregistrement de la puissance du signal 5G ! https://t.co/kqBcSZDZkM

Perturbation des chaînes de la #TNT dans les @DeuxSevres et les départements alentours suite à une panne électrique sur l’émetteur de Parthenay Amailloux. Des interventions des diffuseurs sont en cours pour résoudre l’incident au + vite. + d’infos : https://t.co/xmbgCTvDYF https://t.co/sEpW34Gku6

Où en est le futur système de communications mobiles ferroviaires ? La @EU_Commission vient d'adopter une décision en faveur de la migration du système actuel, le GSM-R, devenu obsolète, vers la nouvelle génération de la radio mobile ferroviaire. ⤵️https://t.co/5C7hJ1zL6P https://t.co/GUAfLB72ZS

« La CMR, à quoi ça sert ? » - C’est la nouvelle série de l’ANFR qui explique chaque mois, dans sa newsletter, les grands enjeux de demain sur les communications sans fil, qui seront abordés lors de la Conférence Mondiale des Radiocommunications de 2023 (CMR-23) https://t.co/4GrQvluwHF

🇫🇷 C'est la #JournéeMondialeDeLaTélévision ! La première diffusion d'une émission de télévision depuis mon sommet a été réalisée en 1935. En 2021, 48 antennes permettent aux parisiens et franciliens de recevoir 46 chaînes de la TNT.
@TDFgroupe #tourEiffel https://t.co/XSaSFWY2Kn

Chaque vendredi, retrouvez la MAJ de nos données #opendata sur https://t.co/cr2xaQiCM7 ! Aujourd’hui, focus sur
@ClermontFd et l'arrivée de la #5G : 100 sites #5G sont autorisés par l’@anfr dont 88 sont déclarés techniquement opérationnels (activés) par les opérateurs mobiles. https://t.co/wC1v46U3Wx

Retrouvez l’intervention de @GillesBregant dans la matinale de @SudRadio ce matin, sur le brouilleur d’ondes à Clermont-Ferrand. Chaque année, l’ANFR traite environ 2000 cas de brouillages de fréquences sur le territoire.
Pour 🎧l'ITW complète c'est ici ⤵️
https://t.co/0RZLq6d9IC https://t.co/Zn4BRN0w9a

ANFR a Retweeté

[#SudRadio] @GillesBregant, DG de l'@ANFR

🗣️ "Un habitant de #Clermont avait installé un brouilleur assez puissant pour perturber 1/4 de la ville ! Soit disant, il voulait perturber le wi-fi de son voisin. Rappelons tout de même qu'un brouilleur est interdit en France" https://t.co/wPdnUenDIL

Un mystérieux brouillage détecté et neutralisé à Clermont-Ferrand https://t.co/vHIeivaA4p

Vrai sujet. On voit fleurir de plus en plus ce type de d’équipements dans des zones réputées pour servir de lieu de répartition d’une grosse livraison, afin de faire tomber les réseaux (et donc rendre inexploitables les données de localisation) le temps de l’opération. https://t.co/FMDZZDWws4

#lesEnquêtesANFR
L’@anfr a été saisie par 2 opérateurs de téléphonie mobile pour résoudre un cas de brouillage particulièrement sensible au vu de son ampleur à Clermont-Ferrand et ses environs : 24 sites mobiles étaient perturbés ! En savoir plus⤵️
https://t.co/HAJmtzy6sZ https://t.co/OuFKPQMbY3

Nous avons un problème

Une erreur est survenue, merci de contacter un administrateur

Recevez l'actualité de l'anfr

> Modifier votre profil