{"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\/cs\/blog\/proekt-openwifi-s-realizacziej-otkrytogo-wi-fi-chipa-na-baze-fpga-i-sdr","title":{"rendered":"Projekt OpenWifi s implementac\u00ed otev\u0159en\u00e9ho Wi-Fi \u010dipu zalo\u017een\u00e9ho na FPGA a SDR","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Na ned\u00e1vn\u00e9 konferenci FOSDEM 2020 <noindex><a rel=\"nofollow\" href=\"https:\/\/fosdem.org\/2020\/schedule\/event\/fsr_openwifi\/\">byl p\u0159edstaven<\/a><\/noindex> projekt <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">OpenWifi<\/a><\/noindex>, vyv\u00edjej\u00edc\u00ed prvn\u00ed otev\u0159enou implementaci kompletn\u00edho Wi-Fi 802.11a\/g\/n, jej\u00ed\u017e forma sign\u00e1lu a modulace je ur\u010dena softwarem (SDR, Software Defined Radio). OpenWifi umo\u017e\u0148uje vytvo\u0159it pln\u011b kontrolovanou implementaci v\u0161ech komponent bezdr\u00e1tov\u00e9ho za\u0159\u00edzen\u00ed, v\u010detn\u011b n\u00edzk\u00fdch vrstev, kter\u00e9 jsou u b\u011b\u017en\u00fdch bezdr\u00e1tov\u00fdch adapt\u00e9r\u016f implementov\u00e1ny na \u00farovni \u010dip\u016f, kter\u00e9 nelze auditovat. K\u00f3d <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">programov\u00fdch komponent\u016f<\/a><\/noindex>, a tak\u00e9 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">sch\u00e9mata a popisy<\/a><\/noindex>  hardwarov\u00fdch blok\u016f ve Verilogu pro FPGA se \u0161\u00ed\u0159\u00ed pod licenc\u00ed AGPLv3.<\/p>\n<p>Hardwarov\u00e1 \u010d\u00e1st p\u0159edveden\u00e9ho pracovn\u00edho prototypu je zalo\u017eena na FPGA Xilinx Zynq a univerz\u00e1ln\u00edm p\u0159ij\u00edma\u010di (RF) AD9361. OpenWifi pou\u017e\u00edv\u00e1 architekturu SoftMAC, kter\u00e1 implikuje realizaci hlavn\u00edho bezdr\u00e1tov\u00e9ho z\u00e1sobn\u00edku 802.11 (high-MAC) na stran\u011b ovlada\u010de a existenci low-MAC vrstvy na stran\u011b FPGA. Jako bezdr\u00e1tov\u00fd z\u00e1sobn\u00edk slou\u017e\u00ed subsyst\u00e9m mac80211, kter\u00fd poskytuje j\u00e1dro Linux. Interakce se SDR se prov\u00e1d\u00ed prost\u0159ednictv\u00edm speci\u00e1ln\u00edho ovlada\u010de.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/open-sdr\/openwifi\/master\/openwifi-arch.jpg\"><img decoding=\"async\" alt=\"Projekt OpenWifi s implementac\u00ed otev\u0159en\u00e9ho Wi-Fi \u010dipu zalo\u017een\u00e9ho na FPGA a SDR\" src=\"\/wp-content\/uploads\/2020\/02\/e3604cad3b6d4e0d0c2491fa1e6969fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Hlavn\u00ed funkce:<\/p>\n<ul>\n<li class=\"l\"> Pln\u00e1 podpora 802.11a\/g a \u010d\u00e1ste\u010dn\u00e1 podpora 802.11n MCS 0~7 (zat\u00edm pouze PHY rx). V pl\u00e1nu je podpora 802.11ax;\n<li class=\"l\"> \u0160\u00ed\u0159ka p\u00e1sma 20MHz a frekven\u010dn\u00ed rozsah od 70 MHz do 6 GHz;\n<li class=\"l\"> Re\u017eimy pr\u00e1ce: <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> (s\u00ed\u0165 z klientsk\u00fdch za\u0159\u00edzen\u00ed), p\u0159\u00edstupov\u00fd bod, stanice a monitorov\u00e1n\u00ed;\n<li class=\"l\"> Implementace protokolu na stran\u011b FPGA <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Distributed_coordination_function\">DCF<\/a><\/noindex> (Distributed Coordination Function), pou\u017e\u00edvaj\u00edc\u00ed metodu CSMA\/CA. Zaji\u0161\u0165uje se doba zpracov\u00e1n\u00ed r\u00e1mce (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Short_Interframe_Space\">SIFS<\/a><\/noindex>) na \u00farovni 10us;\n<li class=\"l\"> Nastaviteln\u00e9 parametry prioritn\u00ed \u00farovn\u011b p\u0159\u00edstupu k kan\u00e1lu: doba RTS\/CTS, CTS-to-self, SIFS, DIFS, xIFS, slot-time atd.\n<li class=\"l\">  Kvanta\u010dn\u00ed \u010das (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Time_slicing_(digital_broadcasting)\">Time slicing<\/a><\/noindex>) na z\u00e1klad\u011b MAC adresy;\n<li class=\"l\"> Snadno m\u011bniteln\u00e1 \u0161\u00ed\u0159ka p\u00e1sma a frekvence:<br \/>\n        2MHz pro 802.11ah a 10MHz pro 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=\"Projekt OpenWifi s implementac\u00ed otev\u0159en\u00e9ho Wi-Fi \u010dipu zalo\u017een\u00e9ho na FPGA a SDR\" src=\"\/wp-content\/uploads\/2020\/02\/32260d0341871b1d4b7ba65c5a42ab6c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>V sou\u010dasnosti OpenWifi zaji\u0161\u0165uje <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">podpora<\/a><\/noindex> SDR platformy na b\u00e1zi FPGA<br \/>\nXilinx ZC706 s p\u0159ij\u00edma\u010di Analog Devices FMCOMMS2\/3\/4, a tak\u00e9 svazky (FPGA + RF) ADRV9361Z7035 SOM + ADRV1CRR-BOB a ADRV9361Z7035 SOM + ADRV1CRR-FMC. Pro nahr\u00e1n\u00ed bylo vytvo\u0159eno <noindex><a rel=\"nofollow\" href=\"https:\/\/users.ugent.be\/~xjiao\/\">hotov\u00fd obraz<\/a><\/noindex> SD karty na b\u00e1zi ARM Linux. V pl\u00e1nu je podpora svazk\u016f ADRV9364Z7020 SOM + ADRV1CRR-BOB, Xilinx zed + FMCOMMS2\/3\/4, Xilinx ZCU102 + FMCOMMS2\/3\/4 a<br \/>\nXilinx ZCU102 + ADRV9371. Cena komponent\u016f pou\u017eit\u00fdch v prvn\u00edm prototypu OpenWifi byla p\u0159ibli\u017en\u011b 1300 euro, ale prob\u00edh\u00e1 portov\u00e1n\u00ed na levn\u011bj\u0161\u00ed desky. Nap\u0159\u00edklad cena \u0159e\u0161en\u00ed zalo\u017een\u00e9ho na <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.analog.com\/resources\/eval\/user-guides\/adrv9364-z7020\">Analog Devices ADRV9364-Z7020<\/a><\/noindex> bude 700 euro, a na z\u00e1klad\u011b <noindex><a rel=\"nofollow\" href=\"https:\/\/aliexpress.ru\/item\/4000498157487.html\">ZYNQ NH7020<\/a><\/noindex> \u2014 400 eur.<\/p>\n<p>Testov\u00e1n\u00ed v\u00fdkonu p\u0159ipojen\u00ed klienta s USB adapt\u00e9rem TL-WDN4200 N900 k p\u0159\u00edstupov\u00e9mu bodu zalo\u017een\u00e9mu na OpenWifi umo\u017enilo dos\u00e1hnout propustnosti 30,6 Mbps (TCP) a 38,8 Mbps (UDP) p\u0159i p\u0159enosu dat od p\u0159\u00edstupov\u00e9ho bodu ke klientovi a 17,0 Mbps (TCP) a 21,5 Mbps (UDP) p\u0159i p\u0159enosu od klienta k p\u0159\u00edstupov\u00e9mu bodu. Pro spr\u00e1vu mohou b\u00fdt pou\u017eity standardn\u00ed utility Linux, jako jsou ifconfig a iwconfig, a tak\u00e9 specializovan\u00e1 utilita sdrctl, kter\u00e1 pracuje p\u0159es netlink a umo\u017e\u0148uje spravovat pr\u00e1ci SDR na n\u00edzk\u00e9 \u00farovni (manipulovat registry, m\u011bnit nastaven\u00ed kvantov\u00e1n\u00ed \u010dasu atd.).<\/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=\"P\u0159ehr\u00e1t 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>Mezi dal\u0161\u00edmi otev\u0159en\u00fdmi projekty, kter\u00e9 experimentuj\u00ed se Wi-Fi stackem, m\u016f\u017eeme zm\u00ednit projekt <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wime-project.net\/\">Wime<\/a><\/noindex>, vyv\u00edjej\u00edc\u00ed kompatibiln\u00ed s IEEE 802.11 a\/g\/p <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bastibl\/gr-ieee802-11\">p\u0159ij\u00edma\u010d<\/a><\/noindex> na b\u00e1zi GNU Radio a b\u011b\u017en\u00e9ho PC. Otev\u0159en\u00e9 softwareov\u00e9 bezdr\u00e1tov\u00e9 stacky 802.11 tak\u00e9 vyv\u00edjej\u00ed projekty <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dimitriv\/Ziria\">Ziria<\/a><\/noindex> a <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=\"Projekt OpenWifi s implementac\u00ed otev\u0159en\u00e9ho Wi-Fi \u010dipu zalo\u017een\u00e9ho na FPGA a 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>Zdroj: <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 5.0.3 - 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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