Automated Real-Time Intelligent Traffic Control System for Smart Cities Using Wireless Sensor Networks

Table 2

Comparison between different wireless communication technologies.

	ZigBee	Bluetooth	Wi-Fi
Range (meters)	1-200	1-50	1-100
Operating frequency (GHz)	2.4	2.4	2.4-5
Bandwidth (kb/s)	20-250	720	11000
System resources (KB)	4-32	250	16000
Battery life (days)	100-1000	1-7	5
Complexity	Low	High	High
Power consumption	Very low	Medium	High
Nodes per network	65000	7	32
Applications	Control and monitoring, sensor networks, automation	Wireless connectivity between devices (PDA, phones, and headsets)	Wireless LAN connectivity, broadband Internet access