{"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\/es\/blog\/proekt-openwifi-s-realizacziej-otkrytogo-wi-fi-chipa-na-baze-fpga-i-sdr","title":{"rendered":"El proyecto OpenWifi con la implementaci\u00f3n de un chip Wi-Fi abierto basado en FPGA y SDR","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>En la conferencia FOSDEM 2020 <noindex><a rel=\"nofollow\" href=\"https:\/\/fosdem.org\/2020\/schedule\/event\/fsr_openwifi\/\">presentado<\/a><\/noindex> iniciado hace varios a\u00f1os <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">OpenWifi<\/a><\/noindex>, desarrollando la primera implementaci\u00f3n abierta del stack completo Wi-Fi 802.11a\/g\/n, cuya forma de se\u00f1al y modulaci\u00f3n se define por software (SDR, Software Defined Radio). OpenWifi permite crear una implementaci\u00f3n completamente controlada de todos los componentes del dispositivo inal\u00e1mbrico, incluidos los niveles de bajo nivel, que en adaptadores inal\u00e1mbricos comunes se realizan en chips que no son auditables. El c\u00f3digo <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi\">de componentes de software<\/a><\/noindex>, as\u00ed como <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">esquemas y descripciones<\/a><\/noindex>  de bloques de hardware en Verilog para FPGA se distribuyen bajo la licencia AGPLv3.<\/p>\n<p>El componente de hardware del prototipo funcional presentado se basa en el FPGA Xilinx Zynq y el transceptor universal (RF) AD9361. OpenWifi utiliza la arquitectura SoftMAC, que implica la implementaci\u00f3n del stack inal\u00e1mbrico 802.11 (high-MAC) en el lado del controlador y la existencia de una capa low-MAC en el FPGA. Se utiliza la subsistema mac80211, proporcionada por el n\u00facleo de Linux, como stack inal\u00e1mbrico. La interacci\u00f3n con el SDR se realiza a trav\u00e9s de un controlador 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=\"El proyecto OpenWifi con la implementaci\u00f3n de un chip Wi-Fi abierto basado en FPGA y SDR\" src=\"\/wp-content\/uploads\/2020\/02\/e3604cad3b6d4e0d0c2491fa1e6969fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Principales caracter\u00edsticas:<\/p>\n<ul>\n<li class=\"l\"> Soporte completo para 802.11a\/g y soporte parcial para 802.11n MCS 0~7 (hasta ahora solo PHY rx). Se planea el soporte para 802.11ax;\n<li class=\"l\"> Ancho de banda de 20MHz y rango de frecuencias de 70 MHz a 6 GHz;\n<li class=\"l\"> Modos de operaci\u00f3n: <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> (red de dispositivos cliente), punto de acceso, estaci\u00f3n y monitoreo;\n<li class=\"l\"> Implementaci\u00f3n en el FPGA del protocolo de nivel de enlace <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Distributed_coordination_function\">DCF<\/a><\/noindex> (Distributed Coordination Function), que utiliza el m\u00e9todo CSMA\/CA. Se garantiza un tiempo de procesamiento de trama (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Short_Interframe_Space\">SIFS<\/a><\/noindex>) a nivel de 10us;\n<li class=\"l\"> Par\u00e1metros configurables de prioridad de acceso al canal: duraci\u00f3n de RTS\/CTS, CTS-to-self, SIFS, DIFS, xIFS, tiempo de ranura, etc.\n<li class=\"l\">  Cuantizaci\u00f3n del tiempo (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Time_slicing_(digital_broadcasting)\">Time slicing<\/a><\/noindex>) basado en la direcci\u00f3n MAC;\n<li class=\"l\"> Ancho de banda y frecuencia f\u00e1cilmente ajustables:<br \/>\n        2MHz para 802.11ah y 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=\"El proyecto OpenWifi con la implementaci\u00f3n de un chip Wi-Fi abierto basado en FPGA y SDR\" src=\"\/wp-content\/uploads\/2020\/02\/32260d0341871b1d4b7ba65c5a42ab6c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Actualmente, OpenWifi garantiza <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/open-sdr\/openwifi-hw\">soporte<\/a><\/noindex> plataformas SDR basadas en FPGA<br \/>\nXilinx ZC706 con transceptores Analog Devices FMCOMMS2\/3\/4, as\u00ed como conjuntos (FPGA + RF) ADRV9361Z7035 SOM + ADRV1CRR-BOB y ADRV9361Z7035 SOM + ADRV1CRR-FMC. Se ha generado una <noindex><a rel=\"nofollow\" href=\"https:\/\/users.ugent.be\/~xjiao\/\">imagen lista<\/a><\/noindex> de tarjeta SD basada en ARM Linux. Se planea el soporte para conjuntos ADRV9364Z7020 SOM + ADRV1CRR-BOB, Xilinx zed + FMCOMMS2\/3\/4, Xilinx ZCU102 + FMCOMMS2\/3\/4 y<br \/>\nXilinx ZCU102 + ADRV9371. El costo de los componentes utilizados en el primer prototipo de OpenWifi fue de aproximadamente 1300 euros, pero se est\u00e1 portando a placas m\u00e1s econ\u00f3micas. Por ejemplo, el costo de la soluci\u00f3n basada en <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.analog.com\/resources\/eval\/user-guides\/adrv9364-z7020\">Analog Devices ADRV9364-Z7020<\/a><\/noindex> ser\u00e1 de 700 euros, y la basada en <noindex><a rel=\"nofollow\" href=\"https:\/\/aliexpress.ru\/item\/4000498157487.html\">ZYNQ NH7020<\/a><\/noindex> \u2014 400 euros.<\/p>\n<p>Las pruebas de rendimiento de la conexi\u00f3n del cliente con el adaptador USB TL-WDN4200 N900 al punto de acceso basado en OpenWifi lograron un ancho de banda de 30.6 Mbps (TCP) y 38.8 Mbps (UDP) al transferir datos desde el punto de acceso al cliente, y 17.0 Mbps (TCP) y 21.5 Mbps (UDP) al transferir del cliente al punto de acceso. Para la gesti\u00f3n se pueden utilizar utilidades est\u00e1ndar de Linux, como ifconfig e iwconfig, as\u00ed como una herramienta especializada, sdrctl, que funciona a trav\u00e9s de netlink y permite gestionar el SDR a nivel bajo (manipular registros, cambiar configuraciones de cuantizaci\u00f3n de tiempo, etc.).<\/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=\"Reproducir 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>De otros proyectos open source que experimentan con el stack de Wi-Fi, se puede destacar el proyecto <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wime-project.net\/\">Wime<\/a><\/noindex>, que desarrolla un transmisor compatible con IEEE 802.11 a\/g\/p <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bastibl\/gr-ieee802-11\">basado en GNU Radio y un PC convencional. Los stacks inal\u00e1mbricos abiertos 802.11 tambi\u00e9n desarrollan proyectos<\/a><\/noindex> Ziria <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dimitriv\/Ziria\">Sora<\/a><\/noindex> y <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/microsoft\/Sora\">(Microsoft Research Software Radio).<\/a><\/noindex> Docker Compose: simplificaci\u00f3n del trabajo con Makefile<br \/>\n<center><noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/pics_base\/0_1580821775.png\"><img decoding=\"async\" alt=\"El proyecto OpenWifi con la implementaci\u00f3n de un chip Wi-Fi abierto basado en FPGA y 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>Fuente: <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 5.0.2 - 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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