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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.

#25AnsANFR🎂 #1jour1date Le 5 avril 2016, c’est le passage à la #TNT HD ! L’@anfr lance une campagne d’information incitant les téléspectateurs à se munir d’un téléviseur ou d’un adaptateur compatible HD pour continuer à recevoir la TNT. ©M.Chalvin https://t.co/jhZ2jEvCUR

#EU5GConf Lors de la session sur les verticaux, Eric Fournier évoque la connectivité 5G pour des applications locales (industrie, media, transport/logistique, agriculture) : de futures bandes harmonisées à 4 GHz (autorisations générales) et à 6 GHz (autorisations individuelles) ? https://t.co/jHAlKKS9Df

.@GillesBregant , DG de l’@ANFR et Eric Fournier, Directeur de la planification du spectre et des affaires internationales, interviennent aujourd’hui à la Conférence européenne sur la #5G.
Pour plus d'informations et pour suivre l'événement ⤵️
https://t.co/H1y3WdS2Kg #EU5GConf https://t.co/f34OdNz3d8

« Ce n’est pas la 5G qui perturbe les radioaltimètres, ce sont plutôt ces derniers qui sont mal préparés à l’apparition de la 5G » ⁦⁦@GillesBregant⁩ 👇 https://t.co/oOZlPcoH2b

#25AnsANFR🎂 #1jour1date le 2 avril 2015, l’@anfr publie ses 1ers jeux de données en #opendata sur le site gouvernemental https://t.co/vM0dSfHuVG. Ces données ouvertes donneront lieu à l’organisation de hackathons annuels dédies aux fréquences : « les Fr’Hacks » ©M.Chalvin https://t.co/ua8HBlCVpX

[in English] The ANFR has published in English the first results of measurement of public exposure to waves carried out before and after the #5G roll out in 1500 sites in France.

https://t.co/Qjw8jrhyoZ https://t.co/cRFojVtYwd

L’ANFR est intervenue la semaine dernière à Lorient avec la @DGA sur la future frégate de la @MarineNationale, la FREMM Lorraine, pour vérifier les nombreux systèmes de transmission par fréquences, à l’approche des 1ers essais en mer https://t.co/CgIMi2hmaH

#25AnsANFR🎂 #1jour1date 29 janvier 2015 : la Loi dite « Abeille » (Loi sur la sobriété, la transparence, l’ information et la concertation en matière d’exposition aux ondes) confie à l’ANFR de nouvelles missions, notamment le recensement des points atypiques ©M.Chalvin https://t.co/vAWYLalkQz

🎙️Retrouvez l’intervention de @gillesbregant, DG de l’@anfr, ce matin sur @Franceculture pour répondre à la question « la 5G peut-elle perturber le trafic aérien ? »
L’intégralité de l’interview en replay : La 5G peut-elle perturber le trafic aérien ? ⤵️https://t.co/Jg4TeCENXs https://t.co/9x5S4ADyAZ

#25AnsANFR🎂 #1jour1date Depuis le 1er janvier 2014, l’@ANFR gère le dispositif national de contrôle et de mesures des ondes, qui permet aux particuliers et aux collectivités de faire des demandes de mesures d’exposition. ©M.Chalvin https://t.co/x7GMziudNi

#25AnsANFR🎂 #1jour1date 1er novembre 2012 : l’@ANFR autorise les 1ères implantations de sites 4G et publie son 1er #observatoire du déploiement des réseaux mobiles, qui rend le processus de déploiement des opérateurs mobiles plus transparent. ©M.Chalvin https://t.co/YUIv3Sgj1h

ANFR a Retweeté

L’oreillette divise par 10 votre exposition aux ondes des smartphones https://t.co/OI9xOJyDma

#25AnsANFR🎂 #1jour1date 8 mai 2012 : refonte des certificats radioamateurs français en un seul certificat « HAREC », qui permet une reconnaissance avec les certificats étrangers et autorise le mode numérique. ©M.Chalvin https://t.co/xDRLTuVTvh

ANFR a Retweeté

Pour le bon réseau, je vous renvoie à cette étude de l'@anfr: appeler dans de bonnes conditions peut diviser le niveau d'exposition... par 32.000.

Donc on évite les coups de fil dans le train. En plus ça énerve tout le monde.

https://t.co/WANe44JtCS

ANFR a Retweeté

Avions et 5G : pourquoi la France a moins de soucis que les États-Unis https://t.co/oiAsMf4vqP https://t.co/teDIvyqRyK

L’ANFR publie ce jour une étude sur l’exposition aux ondes du téléphone portable utilisé avec un kit oreillette : cette utilisation permet de réduire d’un facteur 10 en moyenne son exposition aux ondes, comparé à un usage direct de son téléphone portable.
https://t.co/rV86kvbq2m https://t.co/xETs9bPcMz

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