NBIOT and UWB
With the advent of smart cities and the era of big data, wireless communication will achieve universal connectivity. Many companies expect that the number of global IoT connections in the future will be a billion-dollar era. A large number of objects have been connected, but most of these connections are carried by short-range communication technologies such as Bluetooth and Wi-Fi, but non-operator mobile networks. Mobile communication is moving from the connection between people and people to the connection between people and things and things, and the Internet of Everything is an inevitable trend. Because the current 4G network is not capable of connecting objects and objects, Bluetooth, ZigBee, UWB and other communication technologies have wide coverage and large number of connections, which can bring more rich application scenarios and should become the main connection of the Internet of Things. technology.
NB-IoT has become an important branch of the Internet of Everything. Built on a cellular network, NB-IoT consumes only about 180KHz of bandwidth and can be deployed directly on GSM networks, UMTS networks or LTE networks to reduce deployment costs and achieve smooth upgrades.
NB-IoT is an emerging technology in the IoT space that supports low-power devices in the WAN cellular data connection, also known as low-power wide area network (LPWAN). NB-IoT supports efficient connection of devices with long standby time and high network connection requirements. The NB-IoT device is said to have a battery life of at least 10 years, while providing a very comprehensive indoor cellular data connection coverage. Such transmission can save energy, and the life of the battery is long. But this bandwidth is only suitable for transmitting simple control signals, not suitable for big data, such as music and video signals. The corresponding ultra-wideband technology has made great contributions to the development of the Internet of Things in recent years.
With high spatial resolution, the distance resolution accuracy of UWB systems is hundreds of times higher than other systems. The distance resolution of the UWB signal can reach centimeter level, which is beyond the reach of other narrowband systems. Ultra-wideband technology has developed a wireless channel with large capacity. It also has the advantages of being insensitive to channel fading, low power spectrum of transmitted signals, high ranging accuracy, and low system cost, and has received widespread attention. Utilizing these advantages, the ultra-wideband signal has good penetrability and accurate ranging characteristics for obstacles, and can design an ultra-wideband pulse wireless positioning system with strong communication function and positioning function, which can be widely applied to electric power and smart chemical plant, construction control, rail transit, airport security, military training and other fields. Compared with other positioning technologies such as WiFi and Bluetooth, the ultra-wideband positioning anchor has superior penetration capability and high stability. The influence of the shielding material such as wood, plastic and glass in the application environment is not Very large, so the application of ultra-wideband positioning technology in a complex environment is undoubtedly the best choice.
4.UWB's contribution to the IOT
IOT is based on the Internet of the Internet, using wireless and other technologies such as radio data communication to construct an "Internet of Things" that covers everything in the world. In this network, items (goods) can “communicate” with each other without human intervention. Its essence is to use the various radio frequency technologies to realize the automatic identification of items (goods) and the interconnection and sharing of information through the computer Internet. As one of the information collection technologies, UWB can provide good technical support for automatic identification and object communication, and will certainly serve the increasingly intelligent and informatized industries.