Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-04-02T12:36:23Z No. of bitstreams: 1 PedroMaiaDeSantana_DISSERT.pdf: 2069422 bytes, checksum: 1a983f5131609d3cf7fe3bd96b0ef27d (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-04-04T13:34:35Z (GMT) No. of bitstreams: 1 PedroMaiaDeSantana_DISSERT.pdf: 2069422 bytes, checksum: 1a983f5131609d3cf7fe3bd96b0ef27d (MD5) / Made available in DSpace on 2018-04-04T13:34:36Z (GMT). No. of bitstreams: 1 PedroMaiaDeSantana_DISSERT.pdf: 2069422 bytes, checksum: 1a983f5131609d3cf7fe3bd96b0ef27d (MD5) Previous issue date: 2017-12-07 / Este trabalho tem como objetivo realizar um estudo sobre a aplica??o de redes LTE no espectro ISM (Industrial Scientific and Medical) e seu consequente impacto sobre tecnologias comumente coexistentes na mesma faixa de frequ?ncia. Inicialmente, ? realizada uma elucida??o te?rica sobre as regulamenta??es que envolvem o uso de espectro n?o-licenciado. Na sequ?ncia, s?o apresentadas as principais solu??es de coexist?ncia do LTE nesse meio, destacando-se o mecanismo recentemente padronizado pelo 3GPP, o LTE-LBT, e tecnologias espec?ficas de empresas pioneiras na ?rea, tais como a solu??o LTE-DC. Como elemento pr?tico complementar ? investiga??o te?rica inicial, s?o desenvolvidas an?lises de desempenho das respectivas solu??es utilizando o simulador ns-3. A novidade do trabalho ? materializada pela apresenta??o de uma proposta de solu??o para o mecanismo Carrier-Sensing Adaptive Transmission (CSAT). Essa solu??o, baseada em aprendizado de m?quina, visa melhorar o desempenho conjunto dos sistemas que coexistem na faixa ISM. Este trabalho tamb?m prop?e uma solu??o de coexist?ncia do LTE-DC consigo pr?prio a partir de uma abordagem utilizando teoria dos jogos. Essas solu??es s?o comparada com as solu??es cl?ssicas e o seus ganhos s?o evidenciado em cen?rios definidos por ?rg?os de padroniza??o mundial. / This work aims to perform a study about the application of LTE networks in ISM (Industrial Scientific and Medical) spectrum and its impact over technologies that communly coexist in the same frequency range. Initially, it?s made a theoretical elucidation about regulamentations involving the non licensed spectrum usage. In sequence, it?s presented the main LTE coexistence solutions in this field, highlighting the recent mechanism standardized by 3GPP, the LTE-LBT, and specific technologies of pioneering companies in this domain, like LTE-DC solution. As a practical element complementary to the initial theoretical investigation, it?s developed performance analyzes of the respective solutions using ns-3 simulator. The novelty of the work is materialized by the presentation of a solution proposal for the Carrier-Sensing Adaptive Transmission (CSAT). This solution, based on machine learning, aims to improve the joint performance of systems that coexist in the ISM band. This work also propose a solution for LTE-DC self-coexistence by a game theory approach. These solutions are compared to the classical ones and their gains are evidenced in scenarios defined by global standardization institutions.