Although 5 g is the focus of global competition in the field of mobile communications, frequency on hot search, but satellite communication also has been a hot topic, especially put forward by the musk "star chain plan (Starlink)" : the 12000 satellite into earth orbit plane, realize networking between stars, service space, ocean, forest, desert and remote areas of mobile broadband communications.
This is also an important reason for the development of satellite communications. Take China as an example. Although the Internet coverage in China has reached 99 percent through universal services, there are still more than 60 percent of the country's land area, such as mountains, grasslands, plateaus, Gobi and deserts, that barely have mobile communication network coverage. Satellite Internet can solve the problem of broadband communication for ships, aircraft and scientific research in remote areas such as oceans, forests and deserts, and become a useful supplement for ground mobile communication.
The establishment of China Satellite Network Group Co., Ltd., under the overall planning, the development of China's satellite communications will undoubtedly enter the fast lane, through the centralized power to do important institutional advantages, quickly build a ubiquitous satellite network, to the stage of international competition.
In fact, before the establishment of China Satellite Network Group Co., Ltd., the domestic satellite constellation has already started to compete with each other, especially after the satellite Internet was included in the communication network infrastructure category for the first time and the "promotion" of the new infrastructure strategy, the development is more rapid. Hongyan fusion constellation of space science and technology, Hongyun constellation of space science and industry, Xingyun constellation of China Electric Science and Technology, Galaxy constellation of private company Galaxy... , both launched their pilot satellites and carried out relevant verification tests.
At the inaugural meeting of China Satellite Network Corporation, State Councilor Wang Yong stressed that the establishment of China Satellite Network Corporation is a major measure based on the overall national strategy and conforming to the general trend of technological industry reform. In particular, we need to do a good job in top-level design and resource integration, strengthen scientific and technological breakthroughs, improve the innovation capacity and overall efficiency of the whole industrial chain, and ensure the security, stability, autonomy and controllability of the system.
In China held in the east is red satellite co., LTD. 2020 annual results show in the meeting, the company director, President of yu-jun ge also points out that we have learned, including aerospace science and technology group "swan goose" system, "HongYun" system of aerospace science and industry group related constellations including construction plan, relevant state departments are to carry on the overall planning, "We understand that there will be major changes to the original plan for Swan Goose."
For a long time, China has always had the institutional advantage of concentrating resources to accomplish big things. After all, the rapid construction of a ubiquitous satellite network requires a large amount of investment and the coordination of resources from all parties. It is more efficient to have a main body to carry out the overall planning and construction. In addition, both satellite and ground mobile communications are resource-constrained systems, and frequency resources and satellite orbit resources are as scarce as commercial land in cities. Therefore, there must be no room for so many homogeneous competition of constellations, so it is necessary to coordinate construction.
Complementarity is greater than competition
With the development of satellite communications, there has been a view that the satellite Internet will overturn and replace the ground cellular communication network. And the establishment of China Satellite Network Group Co., Ltd., considered by some to be the country's fifth largest telecom operator, will have an impact on the traditional telecom operators and may replace them.
The author believes that the ground cellular communication network and satellite communication of traditional operators have their own main circuit, and both have their own advantages and disadvantages, and they meet the needs of different user groups. They are not substitutes for each other, but complement each other, and must go in the same direction.
Previously, Dr. Chen Shanzhi, deputy general manager of China Information and Communications Technology Group, director of the Expert Committee, director of the State Key Laboratory of Wireless Mobile Communications and IEEE Fellow, pointed out in an interview with C114 that the current low-orbit satellite communications and 5G and other ground communications are complementary from multiple dimensions, such as demand, application and technology.
As Musk put it, "Starlink will provide high-speed broadband Internet services to places where access is unreliable, expensive, or completely unavailable." Therefore, speaking objectively, in most of the satellite communication industry, there is no direct competition with the ground mobile communication to match the communication capacity of the system.
In addition, in terms of communication capacity, the communication capacity of a satellite and a ground base station is roughly the same. In the future, there will be more than 10 million 5G base stations in the world, while the number of low-orbit satellites will be in ten thousand levels, a difference of one thousand times. This doomed the satellite communication capacity, user scale, industrial scale and other aspects can only be a complement to 5G.
Therefore, in cities and other densely populated and economically developed regions, mobile broadband Internet access will still be dominated by 5G and other ground cellular communication networks, supplemented by low-orbit satellite communications. The mobile broadband communication in air, sea, forest, desert and remote areas will be dominated by low-orbit satellite communication. In addition, satellite communication is also an important means of communication in the emergency rescue process of sudden natural disasters.
The fusion of the stars and the earth, releasing greater value
It can be said that the integration and complementary development of satellite communications and ground communications will release greater market value. Last year, the China mobile research institute sponsored by the "5 g + air and space integration network technology seminar", China academy of information communication standards, deputy director of the Wan Yi pointed out that using satellite to realize the global generic in coverage and provide constant connectivity, with ground stations to implement the hotspots cover, provide high transmission capacity can give full play to the advantages of two kinds of networks, realize the complementary advantages, Natural integration, with a strong social and economic significance.
However, in the process of integration and development, due to the incompatibility of existing standards, it cannot well support the development needs of the business. Therefore, the integration of space and space information network standards has become an inevitable choice of the industrial chain. As for how to achieve this, Wan Yi has the following suggestions: First, break down professional barriers, learn from each other's successful experience, achieve technology exchange, business complementarity, talent interaction and industrial chain integration; The second is to guide the system design with the commercial demand as the guide, and promote the development of standards through demand analysis, scene definition and technical index sorting. Third, form joint efforts to jointly promote the construction of industrial standards and national standards, and actively make a voice in international standardization organizations and form intellectual property rights.
At the same time, with the large-scale commercialization of 5G, 6G research has been put on the agenda according to the evolution rhythm of mobile communication every decade. According to the development vision of 6G, the global connection of space, space and Haiti is realized by the integration of ground communication network, satellite communication network and deep sea and ocean network. Therefore, to promote the integration of space and earth at this stage will provide support for 6G research to the maximum extent.
As Chen Shanzhi said, 6G will establish a mobile communication network in the air, sky, earth and sea. China's early exploration of satellite communication and 5G compatibility will lay a solid foundation for the future development of 6G organic integration of high and low orbit satellite communication and ground mobile communication. Future 6G convergence refers to a communication technology standard system that includes satellite mobile communication and ground mobile communication, and the user terminal adopts unified identification and access of the whole network, no longer differentiates satellite and ground system, and carries out unified management.