The IOT refers to the use of local network or Internet and other communication technologies to connect sensors, controllers, machines, personnel and things in a new way to form a network of people and things, things and things, to achieve intelligent remote management and control network.
A kind of Narrowband Internet of things (NB IOT) based on cellular network has become an important branch of the Internet of things. Nb IOT is built on the cellular network and consumes only about 180khz bandwidth, so it can be directly deployed in GSM network, UMTS network or LTE network to reduce the deployment cost and realize smooth upgrading. NB IOT has four major characteristics: first, it covers a wide range of areas and will provide changes For indoor coverage, Nb IOT has 20dB gain over the existing network at the same frequency band, which is equivalent to 100 times more coverage area; second, it has the ability to support massive connections. One sector of Nb IOT can support 100,000 connections, supporting low delay sensitivity, ultra-low equipment cost, low device power consumption and optimized network architecture; third, lower power consumption, Nb IOT terminal mode The standby time of the block can be as long as 10 years; fourthly, the module cost is lower.
Compared with other narrow band Internet of things technologies, Nb IOT technology has great advantages, which can realize the coexistence of different network deployment networks and has strong compatibility. This technology is the best technology category of mobile cellular network at present. NB IOT is a long-term evolution of cellular network technology, low deployment cost, can cover a large range, and has the ability of data storage and management, which can be effectively applied in a variety of vertical industries. The RF width of Nb IOT is 180khz, which can support three deployment modes: independent deployment, protection band deployment and band in deployment. Different deployment modes have different functions. The first deployment mode can be applied in independent frequency band, which is more suitable for global mobile communication system. The second deployment method is applied to edge useless band in LTE system. The third deployment method is applied to LTR carrier intermediate resource module.
Smart meter is the intelligent terminal of smart grid. In addition to the basic power consumption measurement function of traditional energy meters, smart meters also have bi-directional multi-rate metering function, user control function, bi-directional data communication function of multiple data transmission modes, anti stealing function and other intelligent functions in order to adapt to the use of smart grid and new energy In the future, the development direction of intelligent terminal for end users of energy-saving smart grid is proposed. The development of the existing network is gradually improved, but at present, the reporting method is used to communicate with the statistical points when the meter fails, which has a certain delay. At the same time, if the fault directly leads to the meter damage, it is unable to report the fault situation, which leads to the error of the fault situation received by the power grid company, thus the analysis data is inaccurate.
IOT energy meter based on NB IOT technical, through setting the state monitoring unit and clock unit to detect the state of the meter in real time, and setting the IOT communication unit to respond to the master station for status information transmission; IOT energy meter solves the problem that the fault information received by the master station is not accurate due to the delay of receiving fault condition and incomplete data caused by the existing meter fault, so as to achieve the real-time progress of the meter Line condition monitoring and transmission through the Internet of things communication unit to avoid inaccurate data transmission and delay caused by fault, IOT energy meter is convenient for the State Grid to correctly analyze the power consumption data and facilitate the later management effect.
The concept of the Internet of things has been deeply rooted in the hearts of the people. Based on the core technologies such as big data analysis and new generation Internet of things transmission, the Internet of things data network with "big connection" is constructed to help the government, enterprises and families realize the comprehensive collection, transmission and analysis of terminal equipment data. The new generation of narrow band Internet of things (NB IOT) is bringing energy management into the era of IOT.
Advantages of NB IOT network
In the field of energy management, from traditional manual meter reading, to 2G network meter reading, and then to NB IOT remote meter reading, providing safer and more efficient energy management solutions for industry customers. NB IOT remote meter reading scheme has the following advantages:
1. Massive access
NB IOT has wide coverage and access capability, providing more efficient network support for remote meter reading system than GPRS. The unified protocol makes it possible for a variety of devices to access in mass.
2. Rapid deployment
The unified underlying data protocol saves a lot of analysis and docking work.
The instrument does not need RS485 wiring, and one device can be connected to the Internet.
Through the gateway, traditional instruments can also quickly access the Nb IOT network.
3. Unified open platform
The unified data open platform of operators can solve the problems of inconsistent data formats and inconvenient application services. Third party applications open access and provide diversified solutions.
4. Low cost installation
Instrument direct transmission platform, eliminating gateway, collector and other network layer equipment. NB IOT wireless connection, simple network configuration, save 485 wiring time and cost.
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