Analytical evaluation of LTE femtocells capacity and indoor outdoor coexistence issues

In this paper, the deployment of a LTE (Long Term Evolution) femtocell network is analyzed in downlink. The study focuses on the assessment of the induced interference on a femtocell by both femtocells and macrocells networks. This case corresponds to a shared channels scenario. The radio conditions that can be expected for femtocell and macrocell users, and thus the overall throughput that can be achieved per user served by a femtocell in an indoor environment, are also assessed. Hence, this study allows to establish preliminary conclusions on the cell size for LTE high date rates services and to analyze advantages and drawbacks of the shared channels use. To perform this study, an analytical network model, denoted fluid model, has been adapted to LTE technology and to indoor/outdoor environments.