Yin Hao, academician of the Chinese Academy of Sciences: Satellite Internet can effectively solve the pain points of air network facilities. News on June 6 (Yizhen) At the 2025 China Telecom Low-altitude Economic Cooperation and Development Conference held today, Yin Hao, academician of the Chinese Academy of Sciences, shared a keynote speech on Building Satellite Internet to Boost Low-Altitude Economic Development . Academician Yin Hao pointed out that although the communication experience of smartphone users on the ground has been greatly improved through the efforts of the three major operators, there are still coverage limitations in the terrestrial cellular mobile communication signal network. 71% of the earth's surface is ocean, and about 60% of the land area, such as mountains and deserts, has not yet achieved mobile signal coverage. Therefore, it has become an inevitable trend to move from the 5G terrestrial cellular mobile communication system to the 6G ubiquitous air, air, ground and sea network to achieve seamless global coverage. Satellite Internet emerged as the times require. It is based on satellite communications and forms a large-scale network in space by launching a certain number of large man-made base stations to complete functions similar to terrestrial broadband information access. At present, the development of high, medium and low orbit satellite Internet is going hand in hand, and mobile phone direct connection satellite technology has attracted much attention. For example, China Telecom will use Huawei and Tiantong satellites to achieve certain narrowband functions in 2023, but satellite broadband application capabilities need to be improved. At the system architecture level, there are two main types of satellite Internet: sky-star-ground network and sky-net-ground network . In the Sky-Star-Ground Network mode, exchanges are performed on the ground, and satellites are like base stations in the sky, connected through ground optical fibers; in the Sky-Net Ground Network , satellite base stations are formed into a sky network with the help of sky laser links and ground optical fibers, and then landed through base stations. At the key technical level, satellite Internet involves four major aspects: transmission, networking, management and security. Transmission, as the basis of telecommunications, is the first step for ground equipment to access the network; networking is responsible for building switching links in the sky; management and operations face a huge number of satellites, which is different from ground base station management; security is crucial in the entire system to ensure the stable operation of the satellite Internet. At the application scenario level, satellite Internet empowers low-altitude economic development. At present, the development of low-altitude economy faces pain points in network facilities, especially the insufficient network capabilities of the aerial network to support monitoring. Academician Yin Hao proposed that satellite Internet, ground cellular communication systems and other aerial networks can be used to jointly build low-altitude networks to protect the low-altitude economy. Satellite Internet can promote the deep integration of navigation sensing systems, computing and other fields in a wider range, and provide an effective means for dynamic monitoring of wide-area drones. Currently, there are still base station coverage blind spots in some airspaces between cities, and satellite Internet can also effectively solve this pain point. my country's satellite Internet development idea is unique. Starlink adopts the sky-to-ground network. my country uses the sky-to-ground network. It will be combined with the national One Belt and One Road development strategy and plans to build the system by the end of the year to achieve global coverage, random access, safety and reliability. However, the development of satellite Internet systems faces challenges. The space-based part has been blocked by foreign countries for a long time, and the industrial chain is more fragile than the ground. To this end, it is necessary to develop the high-, medium- and low-orbit orbits in a comprehensive manner and deeply integrate the powerful network advantages on the ground to create an integrated network of sky, ground and sea. At the same time, multiple departments collaborate to build functional entities, embrace intelligence, and implement management controls to comprehensively improve application levels. At the end of the speech, Academician Yin Hao emphasized that building a high space frontier and building a satellite Internet are of great significance to realizing the strategic goals of a network power and a space power, and are also indispensable for the development of low-altitude economy. It is necessary to speed up the construction and independently build China's satellite Internet. Although there is a long way to go, it has broad prospects