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

Abstract

[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.