{"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\/et\/blog\/novosti-interneta\/proekt-openwifi-razvivaet-otkrytyj-wi-fi-chip-na-baze-fpga-i-sdr","title":{"rendered":"OpenWifi projekt arendab avatud Wi-Fi kiipi, mis p\u00f5hineb FPGA-l ja SDR-il.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>FOSDEM 2020 toimunud konverentsil <noindex><a rel=\"nofollow\" href=\"https:\/\/fosdem.org\/2020\/schedule\/event\/fsr_openwifi\/\">esitatud<\/a><\/noindex> projekt <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">OpenWifi<\/a><\/noindex>, arendab esimest avatud rakendust t\u00e4isvalge Wi-Fi 802.11a\/g\/n, mille signaalivorm ja modulatsioon on programmeeritavad (SDR, Software Defined Radio). OpenWifi v\u00f5imaldab luua t\u00e4ielikult kontrollitava rakenduse k\u00f5ikidest juhtmevaba seadme komponentidest, sealhulgas madala taseme kihtidest, mis tavap\u00e4rastes traadita adapterites on teostatavad mitteauditeeritavate kiipide tasemel. Kood <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">programmiliste komponentide<\/a><\/noindex>, samuti <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">skeemid<\/a><\/noindex> (Verilog) riistvarakomponentide FPGA p\u00f5hjal levitatakse AGPLv3 litsentsi alusel.<\/p>\n<p>Esitluse protot\u00fc\u00fcbi riistvara p\u00f5hineb FPGA Xilinx Zynq ja universaalsel vastuv\u00f5tjal (RF) AD9361. OpenWifi-s rakendatakse SoftMAC arhitektuuri, mis t\u00e4hendab 802.11 (high-MAC) p\u00f5hijuhimehhanismi teostamist draiveri poolel ja low-MAC kihi olemasolu FPGA poolel. Traadita p\u00f5hikohana kasutatakse mac80211 alam\u00fcsteemi, mida pakub Linuxi kernel. Suhtlemine SDR-iga toimub spetsiaalse draiveri kaudu.<\/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 projekt arendab avatud Wi-Fi kiipi, mis p\u00f5hineb FPGA-l ja SDR-il.\" src=\"\/wp-content\/uploads\/2020\/02\/fadc2762899cba1349ec245ced7e8ba0.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>P\u00f5hifunktsioonid:<\/p>\n<ul>\n<li class=\"l\"> T\u00e4ielik toetus 802.11a\/g ja osaline toetus 802.11n MCS 0~7 (praegu ainult PHY rx). Plaanis on toetada 802.11ax;\n<li class=\"l\"> 20 MHz ribalai ja sagedusala 70 MHz kuni 6 GHz;\n<li class=\"l\"> T\u00f6\u00f6tamisre\u017eiimid: <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> (kliendiseadmete v\u00f5rk), juurdep\u00e4\u00e4supunkt, jaam ja monitoorimine;\n<li class=\"l\"> FPGA-l p\u00f5hineva kanalikiht protokolli teostamine <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Distributed_coordination_function\">DCF<\/a><\/noindex> (jaotatud koordineerimise funktsioon), mis kasutab CSMA\/CA meetodit. Raami t\u00f6\u00f6tlemise aeg tagatakse (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Short_Interframe_Space\">SIFS<\/a><\/noindex>) tasemel 10 \u00b5s;\n<li class=\"l\"> Konfigureeritavad prioriteediparameetrid signaalide juurdep\u00e4\u00e4suks: RTS\/CTS kestus, CTS-to-self, SIFS, DIFS, xIFS, slot-aeg jne.\n<li class=\"l\">  Aja kvantimine (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Time_slicing_(digital_broadcasting)\">Time slicing<\/a><\/noindex>) MAC-aadressi alusel;\n<li class=\"l\"> Lihtsalt muudetav ribalaius ja sagedus:<br \/>\n        2 MHz 802.11ah jaoks ja 10 MHz 802.11p jaoks;<\/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 projekt arendab avatud Wi-Fi kiipi, mis p\u00f5hineb FPGA-l ja SDR-il.\" src=\"\/wp-content\/uploads\/2020\/02\/cda1122ebd4c40ca22bb54e4211687d1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Praegu on OpenWifi-s tagatud <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">toetamine<\/a><\/noindex> FPGA-p\u00f5hised SDR-platvormid<br \/>\nXilinx ZC706 koos Analog Devices FMCOMMS2\/3\/4 saatjate vastuv\u00f5tjatega, samuti sidemed (FPGA + RF) ADRV9361Z7035 SOM + ADRV1CRR-BOB ja ADRV9361Z7035 SOM + ADRV1CRR-FMC. Laadimise jaoks on loodud <noindex><a rel=\"nofollow\" href=\"https:\/\/users.ugent.be\/~xjiao\/\">valmis pilt<\/a><\/noindex> ARM Linuxi p\u00f5hise SD-kaardi jaoks. Plaanides on tugi sidemetele ADRV9364Z7020 SOM + ADRV1CRR-BOB, Xilinx zed + FMCOMMS2\/3\/4, Xilinx ZCU102 + FMCOMMS2\/3\/4 ja<br \/>\nXilinx ZCU102 + ADRV9371.<\/p>\n<p>Klient\u00fchenduse j\u00f5udluse testimine TL-WDN4200 N900 USB-adapteriga openwifi-p\u00f5hise juurdep\u00e4\u00e4supunktiga n\u00e4itas andmeedastuskiirus 30,6 Mbps (TCP) ja 38,8 Mbps (UDP) andmete edastamisel juurdep\u00e4\u00e4supunktist kliendile ning 17,0 Mbps (TCP) ja 21,5 Mbps (UDP) andmete edastamisel kliendilt juurdep\u00e4\u00e4supunkti. Halduseks v\u00f5ivad kasutada tavalisi Linuxi t\u00f6\u00f6riistu, nagu ifconfig ja iwconfig, samuti spetsialiseeritud t\u00f6\u00f6riist sdrctl, mis t\u00f6\u00f6tab netlinki kaudu ja v\u00f5imaldab SDR-i madala taseme juhtimist (registrite manipuleerimine, kvantimisaja seadete muutmine jne).<\/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=\"Vaata videot\" 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>Teistest avatud projektidest, mis katsetavad Wi-Fi steki, tasub m\u00e4rkida projekti <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wime-project.net\/\">Wime<\/a><\/noindex>, mis arendab IEEE 802.11 a\/g\/p <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bastibl\/gr-ieee802-11\">edastajat<\/a><\/noindex> GNU Radio ja tavalise PC baasil. Avatud tarkvaraga traadita 802.11 steke arendavad ka projektid <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dimitriv\/Ziria\">Ziria<\/a><\/noindex> ja <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 projekt arendab avatud Wi-Fi kiipi, mis p\u00f5hineb FPGA-l ja SDR-il.\" 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>Allikas: <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). 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