[Retracted] The Application of a Computer Monitoring System Using IoT Technology

Table 1

Seven kinds of mainstream IoT main technical indicators.

IoT	Operating frequency band	Popular area	Transmission rate	Transmission distance(m)	Transmitting power (mW)	Application range
Bluetooth	2400∼2483.5 MHz	Global	1–24 Mbps	1–100	1–100	Point-to-point transmission of mouse, cell phone, computer, wireless headset, etc
ZigBee	2.4 GHz	Global	250 kbit/s
	868 MHz	Europe	20 kbit/s	10–75(Addable relay)	1–100	Smart home; building automation; home automation
	915 MHz	United States	40 kbit/s
Z-wave	908.42 MHz/868.42 MHz	USA/Europe	9.6 kbps/40 kbps	30(Indoor)-100(Outdoor)	1	Smart home; monitoring and control
SigFox	868 MHz/915 MHz	Europe/USA	100 bps	1–50000	<100	Remote meter reading, monitoring; smart home
WiFi	2.4 GHz/5 GHz	Global	1 Mbps to1 Gbps	50–100	<320	Wireless LAN
NB-IOT	Authorized toll bands below 1 GHz	Global	<100 kbps	1–20000	<100	Loop data collection and monitoring; positioning, home, bicycle
LoRa	433 MHz	Global
	470∼510 MHz	China
	780 MHz	China	0.3–50 kbps	1–20000	<100	Smart home; logistics eye tracking; smart building
	868 MHz	Europe
	915 MHz	United States