{"id":39175,"date":"2019-10-31T22:28:16","date_gmt":"2019-10-31T19:28:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-otkrytogo-4g-steka-srslte-19-09\/"},"modified":"2019-10-31T22:28:16","modified_gmt":"2019-10-31T19:28:16","slug":"vypusk-otkrytogo-4g-steka-srslte-19-09","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-otkrytogo-4g-steka-srslte-19-09","title":{"rendered":"Bylo vyd\u00e1no otev\u0159en\u00e9 4G stacku srsLTE 19.09","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/srsLTE\/releases\/tag\/release_19_09\">Prob\u011bhlo<\/a><\/noindex> uvoln\u011bn\u00ed projektu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/\">srsLTE 19.09<\/a><\/noindex>, vyv\u00edjej\u00edc\u00ed otev\u0159enou platformu pro nasazen\u00ed komponent\u016f mobiln\u00edch s\u00edt\u00ed LTE\/4G bez pot\u0159eby speci\u00e1ln\u00edho hardwaru, vyu\u017e\u00edvaj\u00edc\u00ed pouze univerz\u00e1ln\u00ed programovateln\u00e9 transceivery, jejich\u017e sign\u00e1lov\u00e1 forma a modulace jsou definov\u00e1ny softwarov\u011b (SDR, Software Defined Radio). K\u00f3d projektu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/srsLTE\">dod\u00e1v\u00e1 se<\/a><\/noindex> pod licenc\u00ed AGPLv3.<\/p>\n<p>SrsLTE <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48923\">obsahuje<\/a><\/noindex> realizaci LTE UE (User Equipment, klientsk\u00e9 komponenty pro p\u0159ipojen\u00ed u\u017eivatel\u016f k s\u00edti LTE), z\u00e1kladn\u00ed stanice LTE (eNodeB, E-UTRAN Node B), stejn\u011b jako prvky p\u00e1te\u0159n\u00ed s\u00edt\u011b LTE (MME \u2014 Mobility Management Entity pro interakci se z\u00e1kladn\u00edmi stanicemi, HSS \u2014 Home Subscriber Server pro uchov\u00e1v\u00e1n\u00ed datab\u00e1ze p\u0159edplatitel\u016f a informac\u00ed o slu\u017eb\u00e1ch spojen\u00fdch s p\u0159edplatiteli, SGW \u2014 Serving Gateway pro zpracov\u00e1n\u00ed a sm\u011brov\u00e1n\u00ed paket\u016f pro z\u00e1kladn\u00ed stanice, PGW \u2014 Packet Data Network Gateway pro p\u0159ipojen\u00ed u\u017eivatele k extern\u00edm s\u00edt\u00edm. <\/p>\n<p>V nov\u00e9 verzi:<\/p>\n<ul>\n<li class=\"l\"> Pro vrstvy LTE MAC, RLC a PDCP byla implementov\u00e1na po\u010d\u00e1te\u010dn\u00ed podpora technologie radiov\u00e9ho p\u0159\u00edstupu <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/5G_NR\">NR<\/a><\/noindex> (New Radio), vyvinut\u00e9 pro mobiln\u00ed s\u00edt\u011b 5G;\n<li class=\"l\"> Do realizace standardu <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/NB_IoT\">NB-IoT<\/a><\/noindex> (Narrowband Internet of Things), pou\u017e\u00edvan\u00e9ho pro p\u0159ipojen\u00ed autonomn\u00edch za\u0159\u00edzen\u00ed internetu v\u011bc\u00ed k mobiln\u00ed s\u00edti, byl p\u0159id\u00e1n k\u00f3d pro synchronizaci;\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora kryptografick\u00fdch algoritm\u016f  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.semanticscholar.org\/paper\/The-New-LTE-Cryptographic-Algorithms-EEA3-and-EIA3-Orhanou-Elhajji\/601127d28c86cc45377ad3902a35ff1de7016e6c\">EIA3 a EEA3<\/a><\/noindex>, zalo\u017een\u00fdch na proudov\u00e9m \u0161ifrov\u00e1n\u00ed ZUC;\n<li class=\"l\"> V srsENB (implementace z\u00e1kladn\u00ed stanice) byla p\u0159id\u00e1na podpora technologie <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/long-term-evolution\/lte-to-3g-circuit-switched-fallback-csfb-74dc5a322d53\">CSFB<\/a><\/noindex> (Circuit Switched FallBack), kter\u00e1 umo\u017e\u0148uje b\u011bhem hlasov\u00e9ho hovoru p\u0159e\u010d\u00edst na 3G, pokud s\u00ed\u0165 LTE podporuje pouze re\u017eim p\u0159enosu dat;\n<li class=\"l\"> Byla p\u0159id\u00e1na vrstva pro spu\u0161t\u011bn\u00ed test\u016f TTCN-3 pro kontrolu souladu se standardem komponent pou\u017e\u00edvan\u00fdch pro p\u0159ipojen\u00ed \u00fa\u010dastn\u00edka k s\u00edti LTE;\n<li class=\"l\"> Do simul\u00e1toru kan\u00e1l\u016f byla p\u0159id\u00e1na nov\u00e1 modelov\u00e1 simulace pro komunikaci ve vysokorychlostn\u00edch vlac\u00edch;\n<li class=\"l\"> Byly odstran\u011bny blokuj\u00edc\u00ed pracovn\u00ed re\u017eimy pro vrstvy RRC a NAS.\n<\/ul>\n<p>Hlavn\u00ed funkce:\n<\/p>\n<ul>\n<li class=\"l\"> Syst\u00e9m m\u016f\u017ee pracovat s jak\u00fdmikoli programovateln\u00fdmi transceivery podporovan\u00fdmi ovlada\u010di Ettus UHD (Universal Hardware Driver) a bladeRF, kter\u00e9 jsou schopny pracovat s \u0161\u00ed\u0159kou p\u00e1sma 30,72 MHz. Pr\u00e1ce srsLTE byla testov\u00e1na s deskami USRP B210, USRP B205mini, USRP X300, limeSDR a bladeRF;\n<\/li>\n<li class=\"l\"> Vysokorychlostn\u00ed optimalizovan\u00fd dekod\u00e9r, vyu\u017e\u00edvaj\u00edc\u00ed instrukce Intel SSE4.1\/AVX2 k dosa\u017een\u00ed v\u00fdkonu nad 100 Mbit\/s na b\u011b\u017en\u00e9m hardwaru. Standardn\u00ed implementace dekod\u00e9ru v jazyce C, zaji\u0161\u0165uj\u00edc\u00ed v\u00fdkon na \u00farovni 25 Mbit\/s;\n<\/li>\n<li class=\"l\"> Pln\u00e1 kompatibilita s 8. verz\u00ed LTE standardu a \u010d\u00e1ste\u010dn\u00e1 podpora n\u011bkter\u00fdch funkc\u00ed z 9. verze;\n<\/li>\n<li class=\"l\"> Dostupnost konfigurace pro pr\u00e1ci v re\u017eimu frekven\u010dn\u00edho d\u011blen\u00ed (FDD);\n<\/li>\n<li class=\"l\"> Testovan\u00e9 \u0161\u00ed\u0159ky p\u00e1sma: 1.4, 3, 5, 10, 15 a 20 MHz;\n<\/li>\n<li class=\"l\"> Podpora re\u017eim\u016f p\u0159enosu 1 (single antenna), 2 (transmit diversity), 3 (CCD) a 4 (closed-loop spatial multiplexing);\n<\/li>\n<li class=\"l\"> Ekvaliz\u00e9r s podporou frekven\u010dn\u00edho k\u00f3dov\u00e1n\u00ed ZF a MMSE;\n<\/li>\n<li class=\"l\"> Podpora vytv\u00e1\u0159en\u00ed slu\u017eeb pro dod\u00e1v\u00e1n\u00ed multimedi\u00e1ln\u00edho obsahu v re\u017eimech broadcast a multicast;\n<\/li>\n<li class=\"l\"> Mo\u017enost veden\u00ed podrobn\u00fdch log\u016f s vazbou na \u00farovn\u011b a lad\u00edc\u00edmi dumpy;\n<\/li>\n<li class=\"l\"> Syst\u00e9m zachycen\u00ed paket\u016f na \u00farovni MAC, kompatibiln\u00ed se s\u00ed\u0165ov\u00fdm analyz\u00e1torem Wireshark;\n<\/li>\n<li class=\"l\"> Dostupnost metrik s daty pro sledov\u00e1n\u00ed v re\u017eimu p\u0159\u00edkazov\u00e9ho \u0159\u00e1dku;\n<\/li>\n<li class=\"l\"> Podrobn\u00e9 konfigura\u010dn\u00ed soubory;\n<\/li>\n<li class=\"l\"> Implementace \u00farovn\u00ed LTE MAC, RLC, PDCP, RRC, NAS, S1AP a GW.\n<\/li>\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=51720\">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 19.09, \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-39175","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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