{"id":41277,"date":"2020-02-07T09:28:08","date_gmt":"2020-02-07T06:28:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/proekt-openwifi-s-realizacziej-otkrytogo-wi-fi-chipa-na-baze-fpga-i-sdr"},"modified":"2020-02-07T09:28:08","modified_gmt":"2020-02-07T06:28:08","slug":"proekt-openwifi-s-realizacziej-otkrytogo-wi-fi-chipa-na-baze-fpga-i-sdr","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/proekt-openwifi-s-realizacziej-otkrytogo-wi-fi-chipa-na-baze-fpga-i-sdr","title":{"rendered":"OpenWifi-projektet implementerar en \u00f6ppen Wi-Fi-chip baserad p\u00e5 FPGA och SDR","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Vid den senaste konferensen FOSDEM 2020 <noindex><a rel=\"nofollow\" href=\"https:\/\/fosdem.org\/2020\/schedule\/event\/fsr_openwifi\/\">presenteras<\/a><\/noindex> projektet <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">OpenWifi<\/a><\/noindex>, utvecklar den f\u00f6rsta \u00f6ppna implementeringen av hela Wi-Fi 802.11a\/g\/n-stack, d\u00e4r signalform och modulering definieras programm\u00e4ssigt (SDR, Software Defined Radio). OpenWifi m\u00f6jligg\u00f6r skapandet av en helt kontrollerad implementation av alla komponenter i den tr\u00e5dl\u00f6sa enheten, inklusive l\u00e5gniv\u00e5lager, som i vanliga tr\u00e5dl\u00f6sa adaptrar implementeras p\u00e5 niv\u00e5er som \u00e4r otillg\u00e4ngliga f\u00f6r granskning av chip. Koden <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">programvarukomponenter<\/a><\/noindex>, samt <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">scheman och beskrivningar<\/a><\/noindex>  av h\u00e5rdvarumoduler p\u00e5 Verilog-spr\u00e5ket f\u00f6r FPGA distribueras under AGPLv3-licensen.<\/p>\n<p>Den h\u00e5rdvarukomponent som visades i prototypen baseras p\u00e5 FPGA Xilinx Zynq och den universella s\u00e4ndare\/mottagaren (RF) AD9361. OpenWifi anv\u00e4nder SoftMAC-arkitekturen, vilket inneb\u00e4r att den grundl\u00e4ggande tr\u00e5dl\u00f6sa stacken 802.11 (high-MAC) implementeras p\u00e5 drivrutinsidan och att det finns ett low-MAC lager i FPGA:n. som anv\u00e4nder mac80211 subsystem tillhandah\u00e5lls av Linux-k\u00e4rnan. Interaktion med SDR sker via speciell drivrutin.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/open-sdr\/openwifi\/master\/openwifi-arch.jpg\"><img decoding=\"async\" alt=\"OpenWifi-projektet implementerar en \u00f6ppen Wi-Fi-chip baserad p\u00e5 FPGA och SDR\" src=\"\/wp-content\/uploads\/2020\/02\/e3604cad3b6d4e0d0c2491fa1e6969fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Key features:<\/p>\n<ul>\n<li class=\"l\"> Fullt st\u00f6d f\u00f6r 802.11a\/g och delvis st\u00f6d f\u00f6r 802.11n MCS 0~7 (f\u00f6r n\u00e4rvarande endast PHY rx). St\u00f6d f\u00f6r 802.11ax planeras;\n<li class=\"l\"> Bandbredd p\u00e5 20MHz och frekvensomr\u00e5de fr\u00e5n 70 MHz till 6 GHz;\n<li class=\"l\"> Drifts\u00e4tt: <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> (n\u00e4tverk av klientenheter), \u00e5tkomstpunkt, station och \u00f6vervakning;\n<li class=\"l\"> Implementering av datakanalsprotokollet p\u00e5 FPGA-sidan <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Distributed_coordination_function\">DCF<\/a><\/noindex> (Distributed Coordination Function), som anv\u00e4nder CSMA\/CA-metoden. Hanteringstiden f\u00f6r ramarna (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Short_Interframe_Space\">SIFS<\/a><\/noindex>) \u00e4r p\u00e5 niv\u00e5 av 10us;\n<li class=\"l\"> Konfigurabla prioritetsparametrar f\u00f6r kanal\u00e5tkomst: l\u00e4ngd p\u00e5 RTS\/CTS, CTS-to-self, SIFS, DIFS, xIFS, slot-time etc.\n<li class=\"l\">  Tidskvantisering (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Time_slicing_(digital_broadcasting)\">Time slicing<\/a><\/noindex>) baserat p\u00e5 MAC-adressen;\n<li class=\"l\"> L\u00e4tt justerbar bandbredd och frekvens:<br \/>\n        2MHz f\u00f6r 802.11ah och 10MHz f\u00f6r 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=\"OpenWifi-projektet implementerar en \u00f6ppen Wi-Fi-chip baserad p\u00e5 FPGA och SDR\" src=\"\/wp-content\/uploads\/2020\/02\/32260d0341871b1d4b7ba65c5a42ab6c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>F\u00f6r n\u00e4rvarande har OpenWifi s\u00e4kerst\u00e4llt <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">st\u00f6d f\u00f6r<\/a><\/noindex> SDR-plattformar baserade p\u00e5 FPGA<br \/>\nXilinx ZC706 med s\u00e4ndare\/mottagare fr\u00e5n Analog Devices FMCOMMS2\/3\/4, samt upps\u00e4ttningar (FPGA + RF) ADRV9361Z7035 SOM + ADRV1CRR-BOB och ADRV9361Z7035 SOM + ADRV1CRR-FMC. F\u00f6r att ladda upp har en <noindex><a rel=\"nofollow\" href=\"https:\/\/users.ugent.be\/~xjiao\/\">f\u00e4rdig bild<\/a><\/noindex> SD-kort baserade p\u00e5 ARM Linux skapats. St\u00f6d f\u00f6r upps\u00e4ttningar ADRV9364Z7020 SOM + ADRV1CRR-BOB, Xilinx zed + FMCOMMS2\/3\/4, Xilinx ZCU102 + FMCOMMS2\/3\/4 och<br \/>\nXilinx ZCU102 + ADRV9371. Kostnaden f\u00f6r komponenterna som anv\u00e4ndes i den f\u00f6rsta prototypen av OpenWifi uppgick till cirka 1300 euro, men portning till billigare kort p\u00e5g\u00e5r. Till exempel kostnaden f\u00f6r l\u00f6sningen baserad p\u00e5 <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.analog.com\/resources\/eval\/user-guides\/adrv9364-z7020\">Analog Devices ADRV9364-Z7020<\/a><\/noindex> blir 700 euro, och baserat p\u00e5 <noindex><a rel=\"nofollow\" href=\"https:\/\/aliexpress.ru\/item\/4000498157487.html\">ZYNQ NH7020<\/a><\/noindex> \u2014 400 euro.<\/p>\n<p>Testning av kundens anslutningsprestanda med USB-adaptern TL-WDN4200 N900 till \u00e5tkomstpunkten baserad p\u00e5 OpenWifi m\u00f6jliggjorde en kapacitet p\u00e5 30,6 Mbps (TCP) och 38,8 Mbps (UDP) vid \u00f6verf\u00f6ring av data fr\u00e5n \u00e5tkomstpunkten till kunden och 17,0 Mbps (TCP) och 21,5 Mbps (UDP) vid \u00f6verf\u00f6ring fr\u00e5n kunden till \u00e5tkomstpunkten. F\u00f6r hantering kan standardverktyg i Linux, s\u00e5som ifconfig och iwconfig, samt det specialiserade verktyget sdrctl, som arbetar via netlink och m\u00f6jligg\u00f6r l\u00e5g niv\u00e5 hantering av SDR (manipulering av register, \u00e4ndring av tidskvotering och s\u00e5 vidare) anv\u00e4ndas.<\/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=\"Spela 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>Bland andra \u00f6ppna projekt som experimenterar med Wi-Fi-stacken kan projektet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wime-project.net\/\">Wime<\/a><\/noindex>, som utvecklar ett IEEE 802.11 a\/g\/p <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bastibl\/gr-ieee802-11\">s\u00e4ndare<\/a><\/noindex> baserat p\u00e5 GNU Radio och en vanlig PC. Programvarubaserade \u00f6ppna tr\u00e5dl\u00f6sa stackar 802.11 utvecklar ocks\u00e5 projektet <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dimitriv\/Ziria\">Ziria<\/a><\/noindex> och <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/microsoft\/Sora\">Sora<\/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=\"OpenWifi-projektet implementerar en \u00f6ppen Wi-Fi-chip baserad p\u00e5 FPGA och SDR\" src=\"\/wp-content\/uploads\/2020\/02\/2c53b93159920132a1cdce064871024c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <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":41278,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-41277","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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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