Design and implementation of simulator for analysis of BLE broadcast signal collision

The Bluetooth Low Energy is a promising technology widely used for Internet of things because of its low energy consumption. However, with the development of IoT, The disadvantage of BLE is becoming more obvious. Due to only three channel is used for BLE broadcasting, the signal collision would become very serious when a large number of BLE devices is existing in a narrow area. This leads to a low scanning performance. According to adjust the parameters (advertisement interval and scan interval), the effect of collision on scanning performance could be mitigated. However, how to adjust these parameters is an issue. In order to make the analysis of scanning performance simple, we developed a simulator in this paper. At last, we will compare the simulation results with experiment. The comparison results shows the validity of our simulator.