The wireless band is the basis for all wireless devices to transmit and is itself a finite resource, agreed by the industry that the crisis of resource depletion is imminent. According to foreign media reports, a recent survey shows that the U.S. mobile handset industry has almost consumed all the frequency bands already open. Allegedly, "band crisis" will result in increased phone call-over rates, delaying data rates and increasing consumer costs. Why the frequency band is so important, as we all know, wireless communication technology need to use a certain frequency band to communicate, just as the car needs the same road. The following to explain the Internet of Things market frequency band. The frequency of wireless technology, such as the transmission distance according to the distance to divide the wireless technology, can be common to some of the Internet of Things wireless technology is divided into the following: LoRa, China LoRa Application Alliance (CLAA) Recommended is 470 ~ 510MHz. NB-IoT, the global mainstream frequency band is 800MHz and 900MHz. China Telecom will use 800MHz as the preferred band for deploying NB-IoT. China Unicom will select 900MHz to deploy NB-IoT, and China Mobile may rework the existing 900MHz band. Sigfox, Europe, Middle East: 868 MHz (ETSI 300-220), North America: 902 MHz (FCC part 15), South America / Australia / New Zealand: 920 MHz (ANATEL 506, AS / NZS 4268). As an open standard LPWAN wireless technology, Weightless operates in the entire ISM / SRD band of the unlicensed Sub-GHz and can be deployed worldwide: 169/433/470/780/868/915 / 923MHz. ZETA, developed by Longitudinal Technologies, operates in multiple Sub-GHz bands (eg, 433, 470, 500, 8778, 868, and 915 MHz, etc.). In addition, ZETA can also operate on a proprietary frequency band by changing configurations. Wi-Fi and Bluetooth, working at 2.4GHz, the world's universal band. NFC, it is learned that the Ministry of Industry will be released based on 13.56MHz near field communication technology standards. Z-Wave, operating in China at 868.40 MHz, complies with the CNAS / EN 300 220 standard. ZigBee, Thread, ISA100.11a and other specifications are based on IEEE 802.15.4 to be extended, the general IEEE 802.15.4 devices using 868/915 / 2400MHz frequency. In addition to 2.4GHz and others, most of the Internet of Things wireless technologies are based on the Sub-GHz band. In addition, in the application of Internet of Things, the frequency of using wireless technologies in different countries or regions is also different. In order to adapt to the development of Internet of Things, countries or regions provide a certain frequency band for Internet of Things applications. The frequency bands used abroad are as follows: North America: 902-928MHz EU: 863-868MHz South Korea: 917.5-923MHz Japan: 916.5-927.5MHz United Kingdom: 915-921MHz
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