Soluções de coexistência LTE/Wi-Fi em banda não licenciada

Abstract

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.