TD-LTE network indoor performance with Micro and Femto deployment in a realistic metropolitan scenario

In the wireless broadband network, most traffic are generated from indoor, and the indoor coverage is identified as the major bottleneck especially in dense urban environment with high-rising buildings. In this paper, the TD-LTE network downlink performance of indoor is studied with various deployment options, including outdoor Macro and Micro cell, indoor Femto cell and their combinations in a realistic large-scale dense urban scenario. For accurate modeling, the real three-dimensional (3D) city map of the investigated area is employed. A 3D ray-tracing tool is used to estimate the propagation occurring between outdoor sites and buildings. A semi-empirical building penetration extension is proposed to derive indoor predictions for each floor based on outdoor predictions at ground-level combined with a height gain model. The traffic offloading features of Micro and Femto cell are evaluated through system simulations.