With the advent of the 5G era, major IoT (Internet of Things) applications are being developed for home and office automation, smart meters, smart grids, healthcare and e-health, monitoring and monitoring systems. intelligent transport, autonomous passenger cars and automotive applications and Industry 0.
The three key technologies of 5G communication are millimeter wave (mmWave), Massive Multiple-Input, Multiple-Output (MIMO) technology, and Small Cell.
1. Millimeter wave technology has three main characteristics: high bandwidth, low latency and high transmission speed. High bandwidth means more devices can be connected at the same time, making it easy for IoT and smart cities.
2. Low latency means that the response time of information transmission is very short and the responses to messages are in real time, which helps to realize autonomous driving and reduce the dangers of road traffic.
3. The high transmission rate is helpful in promoting the development of big data and AI cloud computing, as well as the cloud audiovisual industry.
Since the band frequency of 5G is higher than 4G, its signals are prone to interference or shielding, especially the high-frequency millimeter wave (mmWave), and the transmission distance will be much shorter than that of the low-frequency band. frequency. Consequently, when planning to increase the coverage of high-frequency 5G signals, more base stations need to be deployed, which is why small base stations have focused attention. Figure two shows the concept of the 5G base station application. To meet the demand for bandwidth consumption in urban areas for voice, video and data, telecommunication companies are forced to build the smallest base stations to meet user needs. The infrastructure of these small base stations is generally expected to be another large-scale market in 5G terminal devices.
As shown in Figure XNUMX, small base stations require power sources like other electronic devices, and since they are typically installed in outdoor environments, it is recommended to choose MEAN WELL's HEP series to improve reliability. of the entire station. The power demand of these base stations is proportional to the number of users.
When power requirements are greater than 1000W, the UHP-1500/2500 series are suitable for these base stations. Station manufacturers only need to install the supplied power in a waterproof, dustproof and heat dissipation working environment. The heat generated by the power supply can be dissipated through the base station structure by conduction cooling.
To provide a complete solution for a harsh environment, MEAN WELL launched the HEP-mil-W series. The difference in appearance is shown in Figure 4. The primary difference between this series and the previous HEP-mil series is the input and output cables. The HEP-1000-W series adds outdoor waterproof cables in place of the terminal block. However, both series are IP67 compliant, ideal for outdoor and harsh environments.
