With Li Yanhong publishing an article on "new infrastructure" in the People's Daily, new infrastructure has become a hot word in industry news and the focus of discussion. So what is new infrastructure? "New infrastructure" mainly refers to the seven major areas including 5G base station construction, UHV, intercity high-speed railway and urban rail transit, new energy vehicle charging piles, big data centers, artificial intelligence, and industrial Internet, involving many industrial chains. Guided by new development concepts, driven by technological innovation, based on information networks, and facing the needs of high-quality development, an infrastructure system that provides services such as digital transformation, intelligent upgrades, and integrated innovation.
Among them, what deserves our attention is that the connection part is very important, and it is a key part of this. With the advent of new infrastructure, a large number of IoT devices will also be launched, but the problem is, how to solve the connection problem of these devices? Wired and wireless technologies such as LTE, 5G, WIFI, BT, Zigbee, WLAN, and 485 are all integrated into the connection link, but all types of connection technologies are faced with connection quality, cost and other related factors during mass deployment. PLC-IOT technology (power line carrier communication) , transmit data through the power line, and realize the network follow-up, which can better solve the connection problem in some applications.
PLC-IOT, Powering the Internet of Things
Although the Internet of Things has received unprecedented attention and ushered in the explosive period of the industry, the connection problems of massive devices in diverse scenarios have also surfaced. Existing means of Internet of Things, such as infrared, Bluetooth, ZigBee, LoRa, LTE, etc., have plunged the market into a state of melee, but these technologies have more or less problems, some are greatly affected by the environment, and some have limited communication distances. The communication quality of the network is poor, and what is more serious is that the same network cannot be used between various technologies. In order to realize the Internet of Everything, the cost that customers need to invest will be greatly increased. So how to use existing resources to realize the Internet of Everything has become a problem? Someone put forward the idea that there is electricity and there is a network. More than 20 years ago, Nortel Corporation of Canada had a similar technology, but the development of PLC-IOT technology has been relatively slow. In order to solve the construction and management problems of the Internet of Things, PLC-IoT (power line carrier communication technology) was once again proposed by Huawei. As the name suggests, it can transmit network signals through power lines, and the device can be connected to the network when it is powered on. The distance can be transmitted for several kilometers, and users do not need to build additional networks.
Features and advantages of PLC-IOT
Under the premise of using power line power supply, PLC-IoT technology has the following advantages compared with other communication technologies: a. It
provides longer transmission distance and higher transmission rate
without worrying about wireless signal attenuation caused by building occlusion; theoretical transmission Compared with 2.4G communication technology at a distance of 5Km
, the channel environment is simple. Provides a transmission rate of 200kbps application layer to ensure the real-time communication of IoT products
b. Provides convenient construction, operation and maintenance, and can be used when there is power.
No need to pay attention to the topology, as long as the power supply of the equipment is guaranteed, the communication can be realized
without considering the deployment of relay nodes, as long as In the same power transformer power supply environment, communication can be carried out
c. A simple and economical solution can be used to isolate the communication area. The communication area
can be isolated through simple parallel connection capacitors to avoid interference between communication areas and
realize non-perceptual self-organization in the same communication area. Net
will give you a brief understanding of PLC-IOT
. After understanding the characteristics and advantages of PLC-IOT, I wonder if you can’t wait to learn more about PLC-IOT. The next article will give you a brief understanding.
What is PLC?
Power Line Communication (PLC, or Power Line Communication) is a unique communication method for power systems. It is a technology that uses existing AC or DC power lines as communication carriers for high-speed data transmission.
PLC transmission principle
It converts the original signal into a high-frequency signal through modulation and loads it on the power line for transmission. The modulated signal is taken out and demodulated at the receiving end to obtain the original signal and realize information transmission. The current PLC technical standards mainly include: IEEE P1901.1, QGDW11612, etc.
PLC modulation signal
PLC-IOT Mesh network
CCO: master node, creating and maintaining the power carrier communication network;
STA: leaf node;
PCO: relay node.
Power line deployment is convenient, but "difficult to serve"
Although PLC-IOT has the advantages of network follower and no need for rewiring, it is unstable, high noise, and strong attenuation is also a headache. This requires reliable, high-speed data communication to solve low-voltage power distribution Network various factors: noise, impedance fluctuations, distribution network structure, electromagnetic compatibility, line impedance, signal weakening caused by capacitive loads.
PLC-IOT module can handle
PLC-IOT module 3121N-UH is based on HiSilicon Hi3921 PLC chip design, adopts the latest OFDM technology, has super anti-noise and anti-attenuation performance, can quickly build PLC-IOT network, and supports large-scale Node tree network and mesh network provide stable, reliable and high-speed power line carrier communication performance.
1. Support dynamic routing, which can realize multi-network coordination and coexistence. 15-level routing relay can achieve long-distance network coverage; the network supports 1000 nodes and fast networking.
2. The chip supports IEEE1901.1 and SunSpec standards, and meets EN50561, EN55022, EN50065, FCC Part 15B and KCC international testing standards.
3. Integrated high-performance ARM Cortex-M3 processor, providing SPI, UART, I2C, PWM, GPIO, etc. Peripheral interface, support multi-channel AD analog input
4. Equipped with LiteOS, an open source operating system of Huawei Internet of Things, providing a more open development environment and faster and safer system operation
5. Compared with traditional narrowband PLC communication technology, it improves communication Robustness, effectively improving the on-site transmission distance
PLC-IOT application
PLC-IOT technology can be widely used in various scenarios such as whole-house intelligence, photovoltaics, street lights and light control, charging piles, parking lots, tunnel engineering, smart buildings, and smart agriculture, which can greatly simplify the actual line deployment cost and time, reducing product operation and maintenance costs and risks.
Oufeixin Technology is a professional manufacturer dedicated to communication modules and solutions for the Internet of Things. Based on the Hisilicon 3921 PLC-IoT solution, it will continue to invest in the Internet of Things to help customers solve problems and reduce operation and maintenance costs. Backed by the new infrastructure policy bonus, Ofixion will contribute to the interconnection application of PLC-IOT in the new infrastructure.