“…The indoor facility is divided into several rooms and a hallway with usual building blocks and metallic doors, as depicted in Figure 4. Here, E5, E10, E15, E20, E25, E30, E35, E40, E45, E50 are the different positions of end nodes at 5,10,15,20,25,30,35,40,45, and 50 m, respectively, from the coordinator (C1). We should also note that the building has extensive Wi-Fi coverage along with a large amount of Bluetooth devices, affecting the Zigbee performances in comparison to the outdoor scenario.…”