{"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\/pt\/blog\/news\/proekt-openwifi-razvivaet-otkrytyj-wi-fi-chip-na-baze-fpga-i-sdr","title":{"rendered":"O projeto OpenWifi desenvolve um chip de Wi-Fi aberto baseado em FPGA e SDR","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Na confer\u00eancia FOSDEM 2020 <noindex><a rel=\"nofollow\" href=\"https:\/\/fosdem.org\/2020\/schedule\/event\/fsr_openwifi\/\">apresentado<\/a><\/noindex> projeto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">OpenWifi<\/a><\/noindex>, desenvolvendo a primeira implementa\u00e7\u00e3o aberta de pilha completa Wi-Fi 802.11a\/g\/n, cuja forma de sinal e modula\u00e7\u00e3o s\u00e3o definidas por software (SDR, Software Defined Radio). O OpenWifi permite criar uma implementa\u00e7\u00e3o totalmente controlada de todos os componentes de um dispositivo sem fio, incluindo camadas de baixo n\u00edvel, que, em adaptadores sem fio comuns, s\u00e3o implementadas em chips inacess\u00edveis para auditoria. O c\u00f3digo <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">dos componentes de software<\/a><\/noindex>, al\u00e9m de <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">esquemas<\/a><\/noindex> Os blocos de hardware (Verilog) baseados em FPGA s\u00e3o distribu\u00eddos sob a licen\u00e7a AGPLv3.<\/p>\n<p>O hardware do prot\u00f3tipo funcional demonstrado \u00e9 baseado no FPGA Xilinx Zynq e no transceptor universal (RF) AD9361. O OpenWifi usa uma arquitetura SoftMAC, que implica a implementa\u00e7\u00e3o da pilha de wireless 802.11 (high-MAC) no lado do driver, e a exist\u00eancia de uma camada low-MAC no lado do FPGA. A pilha wireless utiliza o subsistema mac80211, disponibilizado pelo n\u00facleo Linux. A intera\u00e7\u00e3o com SDR \u00e9 realizada atrav\u00e9s de um driver especial.<\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/raw.githubusercontent.com\/open-sdr\/openwifi\/master\/openwifi-arch.jpg\"><img decoding=\"async\" alt=\"O projeto OpenWifi desenvolve um chip de Wi-Fi aberto baseado em FPGA e SDR\" src=\"\/wp-content\/uploads\/2020\/02\/fadc2762899cba1349ec245ced7e8ba0.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Principais funcionalidades:<\/p>\n<ul>\n<li class=\"l\"> Suporte total para 802.11a\/g e suporte parcial para 802.11n MCS 0~7 (atualmente apenas PHY rx). Est\u00e1 planejado o suporte para 802.11ax;\n<li class=\"l\"> Largura de banda de 20MHz e faixa de frequ\u00eancia de 70 MHz at\u00e9 6 GHz;\n<li class=\"l\"> Modos de opera\u00e7\u00e3o: <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> (rede de dispositivos clientes), ponto de acesso, esta\u00e7\u00e3o e monitoramento;\n<li class=\"l\"> Implementa\u00e7\u00e3o do protocolo de link no lado do FPGA <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Distributed_coordination_function\">DCF<\/a><\/noindex> (Distributed Coordination Function), utilizando o m\u00e9todo CSMA\/CA. O tempo de processamento do quadro \u00e9 garantido em<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Short_Interframe_Space\">SIFS<\/a><\/noindex>) no n\u00edvel de 10us;\n<li class=\"l\"> Par\u00e2metros de prioridade de acesso ao canal configur\u00e1veis: dura\u00e7\u00e3o do RTS\/CTS, CTS-to-self, SIFS, DIFS, xIFS, tempo de slot, etc.\n<li class=\"l\">  Quantiza\u00e7\u00e3o do tempo (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Time_slicing_(digital_broadcasting)\">Time slicing<\/a><\/noindex>) com base no endere\u00e7o MAC;\n<li class=\"l\"> Largura de banda e frequ\u00eancia facilmente ajust\u00e1veis:<br \/>\n        2MHz para 802.11ah e 10MHz para 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=\"O projeto OpenWifi desenvolve um chip de Wi-Fi aberto baseado em FPGA e SDR\" src=\"\/wp-content\/uploads\/2020\/02\/cda1122ebd4c40ca22bb54e4211687d1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Atualmente, o OpenWifi oferece <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">suporte<\/a><\/noindex> plataformas SDR baseadas em FPGA<br \/>\nXilinx ZC706 com transceptores da Analog Devices FMCOMMS2\/3\/4, al\u00e9m de combina\u00e7\u00f5es (FPGA + RF) ADRV9361Z7035 SOM + ADRV1CRR-BOB e ADRV9361Z7035 SOM + ADRV1CRR-FMC. Para a carga, foi formado <noindex><a rel=\"nofollow\" href=\"https:\/\/users.ugent.be\/~xjiao\/\">uma imagem pronta<\/a><\/noindex> para cart\u00e3o SD com base em ARM Linux. Est\u00e1 nos planos o suporte para combina\u00e7\u00f5es ADRV9364Z7020 SOM + ADRV1CRR-BOB, Xilinx Zed + FMCOMMS2\/3\/4, Xilinx ZCU102 + FMCOMMS2\/3\/4 e<br \/>\nXilinx ZCU102 + ADRV9371.<\/p>\n<p>O teste de desempenho da conex\u00e3o do cliente com o adaptador USB TL-WDN4200 N900 ao ponto de acesso baseado em openwifi alcan\u00e7ou uma capacidade de 30,6 Mbps (TCP) e 38,8 Mbps (UDP) na transmiss\u00e3o de dados do ponto de acesso para o cliente e 17,0 Mbps (TCP) e 21,5 Mbps (UDP) na transmiss\u00e3o do cliente para o ponto de acesso. Utilit\u00e1rios padr\u00e3o do Linux, como ifconfig e iwconfig, assim como a ferramenta especializada sdrctl, que opera via netlink e permite gerenciar o funcionamento do SDR em n\u00edvel baixo (manipular registradores, alterar configura\u00e7\u00f5es de quantiza\u00e7\u00e3o de tempo etc.), podem ser usados para controle.<\/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=\"Por que no hosting comum a administra\u00e7\u00e3o do PrestaShop \u00e9 lenta, e no seu n\u00e3o \u00e9?\" 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>Dentre outros projetos abertos que experimentam com a pilha Wi-Fi, podemos mencionar o projeto <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wime-project.net\/\">Wime<\/a><\/noindex>, que desenvolve um transmissor compat\u00edvel com IEEE 802.11 a\/g\/p <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bastibl\/gr-ieee802-11\">baseado em GNU Radio e um PC comum. As pilhas sem fio abertas de software 802.11 tamb\u00e9m desenvolvem projetos<\/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> A empresa Siemens lan\u00e7ou o hipervisor Jailhouse 0.12<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1580821775.png\"><img decoding=\"async\" alt=\"O projeto OpenWifi desenvolve um chip de Wi-Fi aberto baseado em 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-news"],"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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