{"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\/it\/blog\/novosti-interneta\/proekt-openwifi-razvivaet-otkrytyj-wi-fi-chip-na-baze-fpga-i-sdr","title":{"rendered":"Il progetto OpenWifi sviluppa un chip Wi-Fi open source basato su FPGA e SDR","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Alla conferenza FOSDEM 2020 <noindex><a rel=\"nofollow\" href=\"https:\/\/fosdem.org\/2020\/schedule\/event\/fsr_openwifi\/\">presentato<\/a><\/noindex> progetto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">OpenWifi<\/a><\/noindex>, che sviluppa la prima implementazione open source dell'intero stack Wi-Fi 802.11a\/g\/n, la forma del segnale e la modulazione delle quali sono definite tramite software (SDR, Software Defined Radio). OpenWifi consente di creare un'implementazione completamente controllabile di tutti i componenti di un dispositivo wireless, compresi i livelli di basso livello, solitamente implementati in adattatori wireless con chip non verificabili. Il codice <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">dei componenti software<\/a><\/noindex>, cos\u00ec come <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">schemi<\/a><\/noindex> (Verilog) dei blocchi hardware basati su FPGA \u00e8 distribuito sotto licenza AGPLv3.<\/p>\n<p>La componente hardware del prototipo funzionante dimostrato si basa su FPGA Xilinx Zynq e su un trasmettitore-ricevitore universale (RF) AD9361. In OpenWifi viene utilizzata un'architettura SoftMAC, che prevede l'implementazione dello stack wireless 802.11 (high-MAC) dal lato del driver e la presenza di un livello low-MAC dal lato FPGA. Come stack wireless viene utilizzato il sottosistema mac80211 fornito dal kernel Linux. L'interazione con l'SDR avviene tramite un driver specifico.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/open-sdr\/openwifi\/master\/openwifi-arch.jpg\"><img decoding=\"async\" alt=\"Il progetto OpenWifi sviluppa un chip Wi-Fi open source basato su FPGA e SDR\" src=\"\/wp-content\/uploads\/2020\/02\/fadc2762899cba1349ec245ced7e8ba0.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Funzionalit\u00e0 principali:<\/p>\n<ul>\n<li class=\"l\"> Supporto completo per 802.11a\/g e supporto parziale per 802.11n MCS 0~7 (attualmente solo PHY rx). \u00c8 prevista la supporto per 802.11ax;\n<li class=\"l\"> Larghezza di banda 20MHz e gamma di frequenze da 70 MHz a 6 GHz;\n<li class=\"l\"> Modalit\u00e0 operative: <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> (rete di dispositivi client), punto di accesso, stazione e monitoraggio;\n<li class=\"l\"> Implementazione su FPGA del protocollo a livello di collegamento <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Distributed_coordination_function\">DCF<\/a><\/noindex> (Distributed Coordination Function), utilizzando il metodo CSMA\/CA. Viene garantito un tempo di elaborazione del frame (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Short_Interframe_Space\">SIFS<\/a><\/noindex>) a livello di 10us;\n<li class=\"l\"> Parametri configurabili per la priorit\u00e0 di accesso al canale: durata RTS\/CTS, CTS-to-self, SIFS, DIFS, xIFS, slot-time, ecc.\n<li class=\"l\">  Quantizzazione del tempo (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Time_slicing_(digital_broadcasting)\">Time slicing<\/a><\/noindex>) basata su indirizzo MAC;\n<li class=\"l\"> Larghezza di banda e frequenza facilmente modificabili:<br \/>\n        2MHz per 802.11ah e 10MHz per 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=\"Il progetto OpenWifi sviluppa un chip Wi-Fi open source basato su FPGA e SDR\" src=\"\/wp-content\/uploads\/2020\/02\/cda1122ebd4c40ca22bb54e4211687d1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Attualmente, OpenWifi supporta <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">supporto<\/a><\/noindex> piattaforme SDR basate su FPGA<br \/>\nXilinx ZC706 con ricevitori Analog Devices FMCOMMS2\/3\/4, nonch\u00e9 combinazioni (FPGA + RF) ADRV9361Z7035 SOM + ADRV1CRR-BOB e ADRV9361Z7035 SOM + ADRV1CRR-FMC. \u00c8 stato creato un <noindex><a rel=\"nofollow\" href=\"https:\/\/users.ugent.be\/~xjiao\/\">immagine pronta<\/a><\/noindex> per schede SD basate su ARM Linux. \u00c8 prevista la supporto per combinazioni ADRV9364Z7020 SOM + ADRV1CRR-BOB, Xilinx Zed + FMCOMMS2\/3\/4, Xilinx ZCU102 + FMCOMMS2\/3\/4 e<br \/>\nXilinx ZCU102 + ADRV9371.<\/p>\n<p>Il test delle prestazioni della connessione cliente con l'adattatore USB TL-WDN4200 N900 al punto d'accesso basato su openwifi ha consentito di raggiungere una capacit\u00e0 di 30,6 Mbps (TCP) e 38,8 Mbps (UDP) nella trasmissione dei dati dal punto d'accesso al cliente, e di 17,0 Mbps (TCP) e 21,5 Mbps (UDP) nella trasmissione dal cliente al punto d'accesso. Per la gestione possono essere utilizzati strumenti Linux standard, come ifconfig e iwconfig, oltre a un'utilit\u00e0 specializzata, sdrctl, che funziona tramite netlink e consente di gestire il funzionamento dello SDR a livello basso (manipolando i registri, modificando le impostazioni di quantizzazione del tempo, ecc.).<\/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=\"Riproduci video\" 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>Tra gli altri progetti open source che sperimentano con lo stack Wi-Fi si pu\u00f2 menzionare il progetto <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wime-project.net\/\">Wime<\/a><\/noindex>, che sviluppa un trasmettitore compatibile con IEEE 802.11 a\/g\/p <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bastibl\/gr-ieee802-11\">basato su GNU Radio e un comune PC. Gli stack wireless open source 802.11 stanno anche sviluppando progetti<\/a><\/noindex> Ziria <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dimitriv\/Ziria\">Sora<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/microsoft\/Sora\">(Microsoft Research Software Radio).<\/a><\/noindex> (Microsoft Research Software Radio).<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1580821775.png\"><img decoding=\"async\" alt=\"Il progetto OpenWifi sviluppa un chip Wi-Fi open source basato su FPGA e 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>Fonte: <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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - 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 \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). 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