Mecanismo de acesso inicial baseado em geolocalização para redes de ondas milimétricas

• Ano de defesa: 2019
• Autor(a) principal: Schramm, Alex Lambiase
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio de Janeiro; Brasil; Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia; Programa de Pós-Graduação em Engenharia de Sistemas e Computação; UFRJ
• Palavras-chave em Português: Ondas milimétricas; Acesso inicial; Redes celulares; CNPQ::ENGENHARIAS
• Link de acesso: http://hdl.handle.net/11422/14042

[EN] The use of directional antennas in frequency bands above 10 GHz becomes mandatory due to the high attenuation and other propagation phenomena that occur in these bands. Therefore, user’s initial access in cellular networks of this type becomes slower because it requires that the base station and the user do beamforming before communication. The use of user’s positioning information is a possible way to speed up this procedure, but so far no work has considered the impact of geolocation errors in this process. In this work, we propose two new initial access mechanisms aware of the geolocation errors, which explore a greater angular space to find combinations of beam with improved performance. In addition, a mechanism that precedes initial access has been proposed, which seeks rapid retrieval of the link, reducing the time taken to resume data channel quality.