{"id":56088,"date":"2020-02-04T00:00:00","date_gmt":"2020-02-03T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/proekt-openwifi-razvivaet-otkrytyj-wi-fi-chip-na-baze-fpga-i-sdr"},"modified":"2020-02-18T14:04:17","modified_gmt":"2020-02-18T11:04:17","slug":"proekt-openwifi-razvivaet-otkrytyj-wi-fi-chip-na-baze-fpga-i-sdr","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/proekt-openwifi-razvivaet-otkrytyj-wi-fi-chip-na-baze-fpga-i-sdr","title":{"rendered":"Le projet OpenWifi d\u00e9veloppe une puce Wi-Fi ouverte bas\u00e9e sur FPGA et SDR","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Lors de la conf\u00e9rence FOSDEM 2020 <noindex><a rel=\"nofollow\" href=\"https:\/\/fosdem.org\/2020\/schedule\/event\/fsr_openwifi\/\">pr\u00e9sent\u00e9<\/a><\/noindex> le projet <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">OpenWifi<\/a><\/noindex>, d\u00e9veloppant la premi\u00e8re r\u00e9alisation ouverte d'une pile compl\u00e8te Wi-Fi 802.11a\/g\/n, o\u00f9 la forme du signal et la modulation sont d\u00e9finies par logiciel (SDR, Software Defined Radio). OpenWifi permet de cr\u00e9er une r\u00e9alisation totalement contr\u00f4l\u00e9e de tous les composants d'un appareil sans fil, y compris les couches de bas niveau, qui dans les adaptateurs sans fil ordinaires sont r\u00e9alis\u00e9es au niveau de puces non auditables. Le code <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">des composants logiciels<\/a><\/noindex>, ainsi que <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">sch\u00e9mas<\/a><\/noindex> (Verilog) des blocs mat\u00e9riels sur la base des FPGA sont diffus\u00e9s sous licence AGPLv3.<\/p>\n<p>La composante mat\u00e9rielle du prototype de travail pr\u00e9sent\u00e9 est bas\u00e9e sur le FPGA Xilinx Zynq et le transcepteur universel (RF) AD9361. OpenWifi utilise l'architecture SoftMAC, qui implique la r\u00e9alisation de la pile sans fil 802.11 (high-MAC) du c\u00f4t\u00e9 du pilote et la pr\u00e9sence d'une couche low-MAC du c\u00f4t\u00e9 du FPGA. La sous-syst\u00e8me mac80211 fournie par le noyau Linux est utilis\u00e9e pour la pile sans fil. L'interaction avec le SDR se fait via un pilote sp\u00e9cial.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/open-sdr\/openwifi\/master\/openwifi-arch.jpg\"><img decoding=\"async\" alt=\"Le projet OpenWifi d\u00e9veloppe une puce Wi-Fi ouverte bas\u00e9e sur FPGA et SDR\" src=\"\/wp-content\/uploads\/2020\/02\/fadc2762899cba1349ec245ced7e8ba0.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Fonctionnalit\u00e9s principales :<\/p>\n<ul>\n<li class=\"l\"> Prise en charge compl\u00e8te de 802.11a\/g et prise en charge partielle de 802.11n MCS 0~7 (pour l'instant seulement PHY rx). La prise en charge de 802.11ax est pr\u00e9vue.\n<li class=\"l\"> Bande passante de 20 MHz et plage de fr\u00e9quence de 70 MHz \u00e0 6 GHz ;\n<li class=\"l\"> Modes de fonctionnement : <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%91%D0%B5%D1%81%D0%BF%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D0%BD%D0%B0%D1%8F_ad-hoc-%D1%81%D0%B5%D1%82%D1%8C\">Ad-hoc<\/a><\/noindex> (r\u00e9seau d'appareils clients), point d'acc\u00e8s, station et surveillance ;\n<li class=\"l\"> Mise en \u0153uvre du protocole de couche liaison <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Distributed_coordination_function\">DCF<\/a><\/noindex> (Distributed Coordination Function), utilisant la m\u00e9thode CSMA\/CA. Le temps de traitement des trames est assur\u00e9 \u00e0<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Short_Interframe_Space\">SIFS<\/a><\/noindex>) au niveau de 10us ;\n<li class=\"l\"> Param\u00e8tres de priorit\u00e9 d'acc\u00e8s au canal configurables : dur\u00e9e RTS\/CTS, CTS-to-self, SIFS, DIFS, xIFS, temps de slot, etc.\n<li class=\"l\">  Quantification du temps (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Time_slicing_(digital_broadcasting)\">Time slicing<\/a><\/noindex>) bas\u00e9e sur l'adresse MAC ;\n<li class=\"l\"> Bande passante et fr\u00e9quence facilement modifiables :<br \/>\n        2 MHz pour 802.11ah et 10 MHz pour 802.11p ;<\/p>\n<\/ul>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1580822257.png\"><img decoding=\"async\" alt=\"Le projet OpenWifi d\u00e9veloppe une puce Wi-Fi ouverte bas\u00e9e sur FPGA et SDR\" src=\"\/wp-content\/uploads\/2020\/02\/cda1122ebd4c40ca22bb54e4211687d1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Actuellement, OpenWifi assure <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">la prise en charge<\/a><\/noindex> des plateformes SDR bas\u00e9es sur les FPGA<br \/>\nXilinx ZC706 avec des transcepteurs Analog Devices FMCOMMS2\/3\/4, ainsi que des combinaisons (FPGA + RF) ADRV9361Z7035 SOM + ADRV1CRR-BOB et ADRV9361Z7035 SOM + ADRV1CRR-FMC. Pour le t\u00e9l\u00e9chargement, une <noindex><a rel=\"nofollow\" href=\"https:\/\/users.ugent.be\/~xjiao\/\">image pr\u00eate<\/a><\/noindex> pour carte SD bas\u00e9e sur ARM Linux. La prise en charge des combinaisons ADRV9364Z7020 SOM + ADRV1CRR-BOB, Xilinx zed + FMCOMMS2\/3\/4, Xilinx ZCU102 + FMCOMMS2\/3\/4 et<br \/>\nXilinx ZCU102 + ADRV9371 est pr\u00e9vue.<\/p>\n<p>Les tests de performance de la connexion d'un client avec l'adaptateur USB TL-WDN4200 N900 \u00e0 un point d'acc\u00e8s bas\u00e9 sur openwifi ont permis d'atteindre une bande passante de 30,6 Mbps (TCP) et 38,8 Mbps (UDP) lors de la transmission de donn\u00e9es du point d'acc\u00e8s vers le client, et de 17,0 Mbps (TCP) et 21,5 Mbps (UDP) lors de la transmission du client vers le point d'acc\u00e8s. Les utilitaires Linux standards tels que ifconfig et iwconfig, ainsi qu'un utilitaire sp\u00e9cialis\u00e9 sdrctl, fonctionnant via netlink et permettant de g\u00e9rer le fonctionnement de SDR \u00e0 un niveau bas (manipuler les registres, changer les param\u00e8tres de quantification temporelle, etc.) peuvent \u00eatre utilis\u00e9s pour la gestion.<\/p>\n<p><center><video  controls=\"\" style=\"width: 640px; height: 400px; max-width:100%\"><source src=\"https:\/\/video.fosdem.org\/2020\/AW1.120\/fsr_openwifi.mp4\" type=\"video\/mp4\"><\/video><\/center><\/p>\n<p><center><div class=\"youtube-placeholder\" data-id=\"NpjEaszd5u4\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/NpjEaszd5u4\/hqdefault.jpg\" alt=\"Lire la vid\u00e9o\" loading=\"lazy\" width=\"480\" height=\"360\" style=\"width:100%;height:auto;\">\r\n        <div class=\"play-button\"><\/div>\r\n    <\/div><\/center><\/p>\n<p>Parmi d'autres projets ouverts exp\u00e9rimentant avec la pile Wi-Fi, on peut noter le projet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wime-project.net\/\">Wime<\/a><\/noindex>, qui d\u00e9veloppe un \u00e9metteur compatible avec IEEE 802.11 a\/g\/p <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bastibl\/gr-ieee802-11\">bas\u00e9 sur GNU Radio et un PC standard. Les piles sans fil 802.11 open source d\u00e9veloppent \u00e9galement des projets<\/a><\/noindex> Ziria <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dimitriv\/Ziria\">Sora<\/a><\/noindex> et <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/microsoft\/Sora\">(Microsoft Research Software Radio).<\/a><\/noindex> Docker Compose : simplification du travail avec Makefile<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1580821775.png\"><img decoding=\"async\" alt=\"Le projet OpenWifi d\u00e9veloppe une puce Wi-Fi ouverte bas\u00e9e sur FPGA et SDR\" src=\"\/wp-content\/uploads\/2020\/02\/df58241fae83d035326f09bd463c998c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Source : <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52309\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0430 \u043f\u0440\u043e\u0448\u0435\u0434\u0448\u0435\u0439 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 FOSDEM 2020 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043f\u0440\u043e\u0435\u043a\u0442 OpenWifi, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u043f\u0435\u0440\u0432\u0443\u044e \u043e\u0442\u043a\u0440\u044b\u0442\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043f\u043e\u043b\u043d\u043e\u0433\u043e \u0441\u0442\u0435\u043a\u0430 Wi-Fi 802.11a\/g\/n, \u0444\u043e\u0440\u043c\u0430 \u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0438 \u043c\u043e\u0434\u0443\u043b\u044f\u0446\u0438\u044f \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0437\u0430\u0434\u0430\u0451\u0442\u0441\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e (SDR, Software Defined Radio). OpenWifi \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0432\u0441\u0435\u0445 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u043e\u0433\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u043d\u0438\u0437\u043a\u043e\u0443\u0440\u043e\u0432\u043d\u0435\u0432\u044b\u0435 \u0441\u043b\u043e\u0438, \u0432 \u043e\u0431\u044b\u0447\u043d\u044b\u0445 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0445 \u0430\u0434\u0430\u043f\u0442\u0435\u0440\u0430\u0445 \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u043c\u044b\u0435 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u043d\u0435\u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0445 \u0434\u043b\u044f \u0430\u0443\u0434\u0438\u0442\u0430 \u0447\u0438\u043f\u043e\u0432. \u041a\u043e\u0434 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0445 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-56088","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0430 \u043f\u0440\u043e\u0448\u0435\u0434\u0448\u0435\u0439 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 FOSDEM 2020 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