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5G is changing society
Compared with the previous four generations (1G, 2G, 3G and 4G) mobile communication network technology, the biggest change of 5G is that its application is not limited to daily communication, but covers a broader application scenario of the Internet of things. Currently, the three usage scenarios defined by ITU for 5G are enhanced mobile bandwidth (eMBB), low latency high reliable communication (uRLLC) and large-scale machine communication (mMTC).At present, countries around the world have reached a basic consensus. 2019 is identified as the pre-commercial year for 5G, while 2020 is the official commercial year for 5G. At the end of 2019, 3GPP completed the formulation of a complete version of 5G standard, laying a unified standard for global 5G construction and laying a foundation for the commercialization of 5G in the future. In the promotion of 5G construction, communication equipment vendors, mobile phone manufacturers and the three major operators are the most critical roles. Therefore, their every move can affect the nerve of the industry.
Objectively speaking, the amount of investment in the early stage of 5G construction is huge and the laying is very difficult. Therefore, although 5G has aroused a heated discussion in the whole society, its construction is bound to go through a long period. For quite a long period, there will be a coexistence of 4G and 5G signals.
Review of communications development: from 1G to 4G
In terms of the development history of human technology, mobile communication technology can be traced back to more than 100 years ago. One day in 1897, Marconi, an Italian scientist, completed the first radio communication experiment of ships in the English channel, which marked the birth of mobile communication technology. But the real rise of modern communications technology came in the United States in the 1980s. Since then, communications technology has been upgraded almost every 10 years. Globally, due to the influence of many factors such as transmission rate and cost, each generation of digital mobile communication technology has gone through a transitional stage, and there is no unified standard.