{"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\/pt\/blog\/news\/vypusk-otkrytogo-4g-steka-srslte-19-09","title":{"rendered":"Lan\u00e7amento do stack 4G de c\u00f3digo aberto 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\">Aconteceu<\/a><\/noindex> lan\u00e7amento do projeto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/\">srsLTE 19.09<\/a><\/noindex>, desenvolvendo uma pilha aberta para a implementa\u00e7\u00e3o de componentes de redes m\u00f3veis LTE\/4G sem a necessidade de equipamentos especiais, utilizando apenas transceptores program\u00e1veis universais, cuja forma de sinal e modula\u00e7\u00e3o s\u00e3o definidos por software (SDR, Software Defined Radio). C\u00f3digo do projeto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/srsLTE\/srsLTE\">\u00e9 disponibilizado<\/a><\/noindex> sob a licen\u00e7a AGPLv3.<\/p>\n<p>SrsLTE <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48923\">inclui<\/a><\/noindex> implementa\u00e7\u00e3o do LTE UE (User Equipment, componentes do cliente para conectar os assinantes \u00e0 rede LTE), esta\u00e7\u00e3o base LTE (eNodeB, E-UTRAN Node B), bem como elementos da rede de suporte LTE (MME \u2014 Mobility Management Entity para intera\u00e7\u00e3o com esta\u00e7\u00f5es base, HSS \u2014 Home Subscriber Server para armazenar a base de assinantes e informa\u00e7\u00f5es sobre os servi\u00e7os vinculados aos assinantes, SGW \u2014 Serving Gateway para processamento e roteamento de pacotes para esta\u00e7\u00f5es base, PGW \u2014 Packet Data Network Gateway para conectar o assinante a redes externas. <\/p>\n<p>Na nova vers\u00e3o:<\/p>\n<ul>\n<li class=\"l\"> Para os n\u00edveis de LTE MAC, RLC e PDCP, foi implementado suporte inicial \u00e0 tecnologia de acesso r\u00e1dio <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/5G_NR\">NR<\/a><\/noindex> (New Radio), desenvolvida para redes m\u00f3veis 5G;\n<li class=\"l\"> Na implementa\u00e7\u00e3o do padr\u00e3o <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/NB_IoT\">NB-IoT<\/a><\/noindex> (Narrowband Internet of Things), usado para conectar dispositivos aut\u00f4nomos da internet das coisas \u00e0 rede m\u00f3vel, foi adicionado c\u00f3digo para sincroniza\u00e7\u00e3o;\n<li class=\"l\"> Suporte adicionado a algoritmos criptogr\u00e1ficos  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.semanticscholar.org\/paper\/The-New-LTE-Cryptographic-Algorithms-EEA3-and-EIA3-Orhanou-Elhajji\/601127d28c86cc45377ad3902a35ff1de7016e6c\">EIA3 e EEA3<\/a><\/noindex>, baseados no cifrador de fluxo ZUC;\n<li class=\"l\"> No srsENB (implementa\u00e7\u00e3o da esta\u00e7\u00e3o base), foi acrescido suporte para a tecnologia <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), permitindo a revers\u00e3o para 3G durante uma chamada de voz, se a rede LTE suportar apenas o modo de transmiss\u00e3o de dados;\n<li class=\"l\"> Uma camada foi adicionada para executar testes TTCN-3 para verificar a conformidade dos componentes utilizados para conectar o assinante \u00e0 rede LTE;\n<li class=\"l\"> No simulador de canais, foi adicionada um novo modelo de simula\u00e7\u00e3o de comunica\u00e7\u00e3o em trens de alta velocidade;\n<li class=\"l\"> Os modos de opera\u00e7\u00e3o bloqueantes foram eliminados nas camadas RRC e NAS.\n<\/ul>\n<p>Principais funcionalidades:\n<\/p>\n<ul>\n<li class=\"l\"> O sistema pode operar com quaisquer transceptores program\u00e1veis suportados pelos drivers Ettus UHD (Universal Hardware Driver) e bladeRF, capazes de operar em uma largura de banda de 30.72 MHz. O funcionamento do srsLTE foi testado com placas USRP B210, USRP B205mini, USRP X300, limeSDR e bladeRF;\n<\/li>\n<li class=\"l\"> Decodificador otimizado de alta velocidade, utilizando instru\u00e7\u00f5es Intel SSE4.1\/AVX2 para alcan\u00e7ar um desempenho superior a 100 Mbps em hardware comum. Implementa\u00e7\u00e3o padr\u00e3o do decodificador em linguagem C, proporcionando desempenho de 25 Mbps.\n<\/li>\n<li class=\"l\"> Compatibilidade total com a vers\u00e3o 8 do padr\u00e3o LTE e suporte parcial a algumas funcionalidades da vers\u00e3o 9.\n<\/li>\n<li class=\"l\"> Disponibilidade de configura\u00e7\u00e3o para operar em modo de divis\u00e3o de frequ\u00eancia (FDD).\n<\/li>\n<li class=\"l\"> Bandas de frequ\u00eancia testadas: 1.4, 3, 5, 10, 15 e 20 MHz.\n<\/li>\n<li class=\"l\"> Suporte aos modos de transmiss\u00e3o 1 (antena \u00fanica), 2 (diversidade de transmiss\u00e3o), 3 (CCD) e 4 (multiplexa\u00e7\u00e3o espacial em la\u00e7o fechado).\n<\/li>\n<li class=\"l\"> Equalizador com suporte \u00e0 codifica\u00e7\u00e3o de frequ\u00eancia ZF e MMSE.\n<\/li>\n<li class=\"l\"> Suporte \u00e0 cria\u00e7\u00e3o de servi\u00e7os para entrega de conte\u00fado multim\u00eddia nos modos broadcast e multicast;\n<\/li>\n<li class=\"l\"> Possibilidade de manter logs detalhados com v\u00ednculos a n\u00edveis e dumps de depura\u00e7\u00e3o.\n<\/li>\n<li class=\"l\"> Sistema de captura de pacotes no n\u00edvel MAC, compat\u00edvel com o analisador de rede Wireshark.\n<\/li>\n<li class=\"l\"> Disponibilidade de m\u00e9tricas com dados de rastreamento em modo de linha de comando.\n<\/li>\n<li class=\"l\"> Arquivos de configura\u00e7\u00e3o detalhados.\n<\/li>\n<li class=\"l\"> Implementa\u00e7\u00e3o dos n\u00edveis LTE MAC, RLC, PDCP, RRC, NAS, S1AP e GW.\n<\/li>\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=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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