Design of TD-LTE based Signal Indoor Distribution System

In the process of cities informatization, the smart cities use of information technology and service system to handle of urban problems, improving people's lives. We study the problem of indoor signal coverage in smart cities. Indoor signal coverage inside large buildings is important to provide guaranteed communication quality for indoor mobile users. Specifically, traditional cellular coverage is deficit for indoor communications in the following three aspects: the emergence of the mobile signals are weak, or even blind at indoor environment, due to the complicated interior building structure; in some area with high traffic, traditional network is far from sufficient to meet the capacity needs of users; radio frequency interference problem between floors seriously affects the stability of mobile signals and communication quality. Previous research mainly focuses on the outdoor macro cell coverage, and fails to meet the surge demand of indoor communication demand. Indoor coverage system is therefore demanded to solve the issue. In this paper, we investigate on the planning of an indoor distribution system. Based on the analysis of an indoor coverage system, an TD-LTE system is developed to provide indoor signal coverage. We implement our design in a real-world scenario. Using real-world experiments, we verifies the performance of the proposed system.