(the picture shows the exhibitor demonstrating 5g + VR online teaching on site.) (the picture shows workers busy in the workshop of a 5g communication optical cable manufacturer in the economic development zone.) Recently, the 2022 World 5g conference held in Harbin, Heilongjiang province gathered the latest achievements of 5g development in the world. In recent years, the 5g communication optical cable industry in Suixi County Economic Development Zone, Huaibei City, Anhui Province has promoted the high-quality development of the local economy. By the end of July this year, China had built and opened nearly 2 million 5g base stations. However, many people have the feeling that the outdoor 5g signal is stable, and occasionally there will be intermittent situations indoors. Experts pointed out that this was caused by insufficient depth coverage of indoor signals. With the rapid development of online education, telemedicine, remote office and other applications, 5g indoor scenes are increasing. How to solve the problem of indoor signal instability in the current era of wider coverage of the industry and deeper application? 5g small base stations with characteristics of small size, low cost, high performance, low power consumption and easy deployment have become one of the construction focuses. When the offshore wind power plant is far away from the coastline, the network signal is weak and it is difficult to communicate normally. This problem that plagues many power enterprises can now be solved only by a 5g small base station the size of a suitcase. With it, no matter at sea, in remote mountainous areas or in closed basements, 5g network signals can be unblocked. In addition to the smooth signal for making phone calls, the 5g small base station built in the factory can also realize the functions of video transmission in the factory, intelligent patrol inspection in production, and connection of intelligent robot signals. What is a 5g small base station? "The single channel transmission power of a 5g small base station is small, usually in the milliwatt level. The volume of the remote unit is generally about 2L." Fan bin, director of radio network management office of China Unicom Network Department, said that the "small" of 5g small base stations is reflected in two aspects: small size - according to the 3GPP (Third Generation Partnership Project) standard, radio base stations can be divided into four categories, namely macro base stations, micro base stations, Pico base stations and femto base stations. Compared with the macro base station, the latter three are small in size and are generally called "small base stations". Due to its small size and light weight, it supports a variety of backhaul networking modes, has higher installation flexibility, and can complement the network coverage of key scenarios. Small coverage - coverage is volume dependent. The macro base station has the largest volume and the largest signal coverage, mainly solving the long-distance continuous outdoor coverage. The micro base station covers a range of 50-200m and is applied to urban or rural areas where macro base station deployment is limited; Piji station covers a range of 20-50m and is applied to indoor public places, such as transportation hubs, shopping centers, exhibition halls, etc; Femtocell covers a range of 10-20 meters, which is usually suitable for home or enterprise environments. Small base stations are not products of the 5g era. In the 3G and 4G era, with the increase of network demand in indoor scenes, small base stations began to appear. Entering the 5g era, people put forward higher requirements for the transmission speed of wireless communication. Small base stations can be installed indoors to achieve fixed-point deep coverage in weak signals and blind areas, including areas with dense passenger flow or high demand for data flow transmission. In addition,
Edit：Li Jialang Responsible editor：Mu Mu
Source：cctv.com
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