{"id":33603,"date":"2019-10-31T21:53:42","date_gmt":"2019-10-31T18:53:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-otkrytogo-4g-steka-srslte-19-03\/"},"modified":"2019-10-31T21:53:42","modified_gmt":"2019-10-31T18:53:42","slug":"vypusk-otkrytogo-4g-steka-srslte-19-03","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/vypusk-otkrytogo-4g-steka-srslte-19-03","title":{"rendered":"Udgivelse af den \u00e5bne 4G-stak srsLTE 19.03","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/srsLTE\/releases\/tag\/release_19_03\">Har fundet sted<\/a><\/noindex> projektudgivelse <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/\">srsLTE 19.03<\/a><\/noindex>, der udvikler en \u00e5ben stak til implementering af komponenter i LTE\/4G mobilnet uden specielt udstyr, udelukkende ved hj\u00e6lp af universelle, programmerbare modtagere, hvor signalform og modulering defineres programm\u00e6ssigt (SDR, Software Defined Radio). Projektkode <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/srsLTE\">leveres<\/a><\/noindex> under AGPLv3-licensen.<\/p>\n<p>SrsLTE <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48923\">omfatter<\/a><\/noindex> implementeringen af LTE UE (User Equipment, klientkomponenter til at forbinde abonnenten til LTE-netv\u00e6rket), LTE-basenstationen (eNodeB, E-UTRAN Node B) samt elementerne i LTE-backbonen (MME - Mobility Management Entity til interaktion med basestationer, HSS - Home Subscriber Server til lagring af abonnentdata og information om tilknyttede tjenester, SGW - Serving Gateway til behandling og routing af pakker til basestationer, PGW - Packet Data Network Gateway til at forbinde abonnenten til eksterne netv\u00e6rk. <\/p>\n<p>I den nye version:<\/p>\n<ul>\n<li class=\"l\"> Biblioteket med implementering af det fysiske lag af stakken er blevet revideret (<noindex>PHY<\/noindex>);\n<li class=\"l\"> srsUE (LTE UE, brugerudstyr, komponenter p\u00e5 brugerens side, der er n\u00f8dvendige for at forbinde abonnenten til LTE-netv\u00e6rket) har f\u00e5et st\u00f8tte til formatet <noindex><a rel=\"nofollow\" href=\"http:\/\/www.gtigroup.org\/faqs\/lte\/2013-11-04\/18.html\">TDD<\/a><\/noindex>  (Time Division Duplex) ud over det tidligere underst\u00f8ttede og mere udbredte frekvensfordelingsformat i kanalen FDD (Frequency Division Duplex);\n<li class=\"l\"> srsUE har f\u00e5et st\u00f8tte til teknik til frekvenskanalaggregation (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Carrier_aggregation\">Carrier Aggregation<\/a><\/noindex>) for at \u00f8ge b\u00e5ndbredden til slutbrugeren;\n<li class=\"l\"> srsENB (implementering af basestationen) og srsEPC (komponenter af kerne-netv\u00e6rket) har f\u00e5et st\u00f8tte til udsendelse af <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Cellular_network#Broadcast_messages_and_paging\">Paging-beskeder<\/a><\/noindex>, der normalt anvendes til at etablere en direkte kommunikationskanal for abonnenten med basestationen;\n<li class=\"l\"> srsENB har f\u00e5et st\u00f8tte til kryptering af abonnentens trafik (User-plane encryption). St\u00f8tte til signaltrafik (NAS-plane encryption) blev implementeret tidligere;\n<li class=\"l\"> Simulatoren til kanaler for 3GPP-kanaler EPA, EVA og ETU er blevet implementeret;\n<li class=\"l\"> En virtuel RF-driver baseret p\u00e5 ZeroMQ er udviklet, der muligg\u00f8r overf\u00f8rsel af I\/Q-signaler over IPC\/netv\u00e6rk.\n<\/ul>\n<\/p>\n<p>Hovedfunktioner:\n<\/p>\n<ul>\n<li class=\"l\"> Systemet kan arbejde med alle programmerbare modtagere, der underst\u00f8ttes af driverne fra Ettus UHD (Universal Hardware Driver) og bladeRF og som kan operere p\u00e5 en b\u00e5ndbredde p\u00e5 30,72 MHz. SrsLTE's drift er testet med kortene USRP B210, USRP B205mini, USRP X300, limeSDR og bladeRF;\n<\/li>\n<li class=\"l\"> En h\u00f8jhastighedsoptimeret dekoder, der bruger Intel SSE4.1\/AVX2 instruktioner for at opn\u00e5 en ydelse p\u00e5 over 100 Mbit\/s p\u00e5 standardudstyr. Den standardiserede implementering af dekoderen p\u00e5 C-sprog sikrer en ydelse p\u00e5 25 Mbit\/s;\n<\/li>\n<li class=\"l\"> Fuld kompatibilitet med LTE-standardens version 8 og delvis support for nogle funktioner fra version 9;\n<\/li>\n<li class=\"l\"> Konfiguration til at arbejde i frekvensdelingstilstand (FDD);\n<\/li>\n<li class=\"l\"> Testede b\u00e5ndbredder: 1.4, 3, 5, 10, 15 og 20 MHz;\n<\/li>\n<li class=\"l\"> Underst\u00f8ttelse af transmissionsmetoder 1 (single antenna), 2 (transmit diversity), 3 (CCD) og 4 (closed-loop spatial multiplexing);\n<\/li>\n<li class=\"l\"> Equalizer med st\u00f8tte til frekvenskodning ZF og MMSE;\n<\/li>\n<li class=\"l\"> Underst\u00f8ttelse af oprettelse af tjenester til levering af multimedieindhold i broadcast- og multicast-tilstande;\n<\/li>\n<li class=\"l\"> Mulighed for at f\u00f8re detaljerede logfiler med tilknytning til niveauer og debug dumps;\n<\/li>\n<li class=\"l\"> Pakkeoptagelsessystem p\u00e5 MAC-niveau, kompatibelt med netv\u00e6rksanalysatoren Wireshark;\n<\/li>\n<li class=\"l\"> Tilg\u00e6ngelighed af metrikker med sporingsdata i kommandolinjetilstand;\n<\/li>\n<li class=\"l\"> Detaljerede konfigurationsfiler;\n<\/li>\n<li class=\"l\"> Implementering af niveauer LTE MAC, RLC, PDCP, RRC, NAS, S1AP og GW.\n<\/li>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Kilde: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50680\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 srsLTE 19.03, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 \u0441\u0442\u0435\u043a \u0434\u043b\u044f \u0440\u0430\u0437\u0432\u0451\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u044f \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u0441\u043e\u0442\u043e\u0432\u044b\u0445 \u0441\u0435\u0442\u0435\u0439 LTE\/4G \u0431\u0435\u0437 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u0441\u043f\u0435\u0446\u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u0443\u0435\u043c\u044b\u0435 \u043f\u0440\u0438\u0435\u043c\u043e\u043f\u0435\u0440\u0435\u0434\u0430\u0442\u0447\u0438\u043a\u0438, \u0444\u043e\u0440\u043c\u0430 \u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0438 \u043c\u043e\u0434\u0443\u043b\u044f\u0446\u0438\u044f \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0437\u0430\u0434\u0430\u0451\u0442\u0441\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e (SDR, Software Defined Radio). \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 AGPLv3. SrsLTE \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e LTE UE (User Equipment, \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0435 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u044b \u0434\u043b\u044f \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0430\u0431\u043e\u043d\u0435\u043d\u0442\u0430 \u043a \u0441\u0435\u0442\u0438 LTE), \u0431\u0430\u0437\u043e\u0432\u043e\u0439 [&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-33603","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\" 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