Shulou(Shulou.com)11/24 Report--

CTOnews.com April 3 news, CTOnews.com learned officially from China Information and Communication Technology Group Co., Ltd. that in March 2023, at the just-concluded International Telecommunication Union (ITU-T) SG13 plenary meeting, two satellite-to-earth integration international standards led and led by China Information Science and Technology were approved, which achieved a breakthrough in the standardization of key technologies of satellite-to-ground integration communications. It marks another major achievement of China Information Science and Technology in satellite-to-earth integration of "5G compatibility, 6G fusion".

Y.3202 fixed, mobile and satellite convergence: Mobility management for IMT-2020 networks and beyond (fixed, Mobile and Satellite Convergence: mobility Management for IMT-2020 and its evolving Networks)

"Y.3203 fixed, mobile and satellite convergence: Connection management for IMT-2020 networks and beyond" (fixed, mobile and satellite convergence: connection management for IMT-2020 and its evolving networks)

According to reports, global coverage is one of the important visions of the 6G network. 6G satellite-to-ground integration will be the integration of multiple heterogeneous networks of the satellite network and the terrestrial mobile communication network. Through the deep integration of service integration, architecture integration, platform integration, terminal integration, and management integration, the stereoscopic networking of 6G will be realized. However, the multi-layer complex cross-domain networking with the integration of satellite and earth will lead to difficulties in the design of the network architecture, and the high-speed movement of satellites will lead to high dynamic changes in the network topology, which in turn makes it difficult to guarantee the quality of service.

Compared with the traditional ground mobile communication, the satellite-to-ground fusion network needs to solve the technical challenges brought by the rapid movement of space-based network nodes and the large-scale and high dynamic changes of the network environment, and the transmission delay of the satellite-to-ground fusion network varies greatly. the performance of network communication links varies greatly, as well as multi-scale heterogeneous network networking problems such as poor robustness of satellite-to-ground, inter-satellite and space-based links. At the same time, due to the rapid movement of Leo satellites, there will be frequent changes in service satellites for fixed areas. When there are more users in the area, the problem of inter-satellite switching of group users will occur. In order to ensure the service quality of 6G business continuity and form a reliable connection with seamless coverage, how to break through the closeness of mobility management between heterogeneous networks and ensure the continuity of efficient business cooperation between heaven and earth will be one of the challenges facing the integrated network of heaven and earth.

Chen Shanzhi's team is the main drafter of the two approved closing standards. Chen Shanzhi, deputy general manager, chief engineer, director of the Science and Technology Commission of China Information Science and Technology, and director of the National key Laboratory of Wireless Mobile Communications, suggested as early as 2020 that China should build and develop satellite Internet compatible with 5G. It is also pointed out that 6G considers satellite-to-ground integration at the beginning of its design and can achieve the optimization of satellite-to-ground integration at the system level, so 6G satellite-to-ground integration will be system integration.

China Information Science and its subsidiary CITIC Mobile have conducted in-depth research on the key technologies such as satellite-to-ground integrated network architecture, mobility management and connection management. it is committed to solving the problem of mobile phone direct-connected satellite-to-ground integrated communication network through unified network architecture, unified air port protocol and unified spectrum planning management, so that mobile phone users can serve in satellite-to-ground integrated communication network without perception in 6G phase.

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