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Editor to share with you what nb-lot technology refers to, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to understand it!

NB-IoT, or narrowband Cellular Internet of things (Narrow Band-Internet of Things), is a new technology in the field of IoT based on cellular Internet of things, which supports cellular data connection of low-power devices in the wide area network, also known as low-power wide area network; it has the characteristics of low cost, low power consumption and wide coverage.

NB-IoT (Narrow Band-Internet of Things, narrowband Cellular Internet of things) is a new technology in IoT field based on cellular narrowband Internet of things, which supports cellular data connection of low-power devices in the wide area network, also known as low-power wide area network (LPWA).

With the characteristics of low cost, low power consumption and wide coverage (cellular network), NB-IoT is located in the operator-level, low-speed Internet of things market based on authorized spectrum, and has a broad application prospect in the fields of location tracking, environmental monitoring, intelligent parking, remote meter reading, agriculture and animal husbandry.

NB-IoT consumes only about 180KHz frequency band and can be directly deployed in GSM network, UMTS network or LTE network to support efficient connections of devices with short standby time and high network connection requirements. Its main characteristics are wide coverage, many connections, low speed, low cost, low power consumption, excellent architecture and so on. NB-IOT uses the License band and can be deployed in three ways: in-band, protective band or independent carrier.

Four main features of NB-IOT:

LPWA (low Power wide area Network) can be divided into two categories: one is LoRa, SigFox and other technologies that work in unauthorized spectrum, and the other is 2max, 3max, 4G cellular communication technology supported by 3GPP in licensed spectrum, such as EC-GSM, LTE Cat-m, NB-IoT, etc. The representative technology of licensed spectrum is NB-IOT, and the representative technology of unauthorized spectrum is LoRa (Long Range). LoRa is a special technology for radio modulation and demodulation issued by Semech. LoRa combines digital spread spectrum, digital signal processing and forward error correction coding technology. It is understood that millions of Internet of things nodes in the world have used this technology to connect with each other.

Diagram of rate and coverage distance of various wireless communication technologies

NB-IoT technology advantages:

NB-IoT technology is a LPWA (low power wide area network) solution defined by the 3GPP standard, which has the following advantages:

1. Massive connections: up to 100000 connections per cell; NB-IoT has 50-100 times higher uplink capacity than 2G/3G/4G, which means that NB-IoT can provide 50-100 times more access than existing wireless technology in the case of the same base station.

two。 Ultra-low power consumption: battery life up to ten years

The characteristic of low power consumption is an important indicator of the application of the Internet of things, especially for some devices and occasions where batteries can not be changed frequently, such as all kinds of sensor and monitoring devices installed in remote areas of high mountains and wilderness, they cannot be charged once a day like smart phones, and the battery life of several years is the most essential requirement. Under the premise that the battery technology can not make a breakthrough, the battery power supply time can only be extended by reducing the power consumption of the equipment. The energy consumed by communication equipment is often related to the amount of data or rate, that is, the size of the data packet per unit time determines the power consumption. If the amount of data is small, the modem and power amplifier of the device can be adjusted to a very small level. NB-IoT focuses on small data volume and low speed applications, so the power consumption of NB-IoT devices can be very small and the battery life can be guaranteed for more than 5 years.

3. Deep coverage: can achieve higher 20db coverage gain than GSM

NB-IoT increases the 20dB gain than LTE, which is equivalent to a 100x increase in transmission power, that is, a 100x increase in coverage, even in underground garages, basements, underground pipelines and other places where signals are difficult to reach.

4. Security: inheriting 4G network security capabilities, supporting two-way authentication and strict encryption of empty ports to ensure the security of user data

5. Stable and reliable: it can provide carrier-level reliable access and effectively support IoT applications and smart city solutions.

NB- IoT is directly deployed in GSM network, UMTS network or LTE network, and can be reused with existing network base stations to reduce deployment costs and achieve smooth upgrades. However, a separate 180KHz band is used to ensure that traditional services and future Internet of things services can be carried out stably and reliably at the same time. Taking the application of intelligent meter reading as an example, compared with the data recovery success rate of wired PLC, NB-IoT can ensure that the successful data recovery rate can reach 99%, and the reliability is greatly improved.

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