China's first dual-star collaborative high-speed transmission field test for 6G was successful, with a rate exceeding 1Gbps and 'industry leading”

According to news on June 20, China Telecom officially announced that recently, China Telecom Satellite Corporation, together with Beijing University of Posts and Telecommunications, Galaxy Aerospace, China Academy of Information and Communications Technology, Zhanrui and other partners, jointly completed the country’s first 6G satellite-to-ground link at China Telecom’s Beijing Earth Station. Off-road ground testing.

This test used core equipment such as self-developed satellite simulators, terminal simulators, and software-defined test platforms. Based on the project team formulating key technology verification plans and building an field test environment, it completed the first domestic 6G access network High-speed information transmission test in the field. This test is based on the 3GPP NTN standard protocol, optimizing the low-orbit inter-satellite cooperative transmission mechanism to achieve high-speed air interface data merging on the terminal side. The maximum rate exceeds 1Gbps, reaching the "industry-leading level" and providing a basis for my country's future 6G demand research, satellite-ground Provide technical support for converged networking. According to reports, as an important part of 6G, satellite communications will provide seamless, high-speed, three-dimensional coverage capabilities around the world. Affected by the ultra-long distance between satellite and ground, satellite radio frequency, and inter-satellite synchronous locking, achieving high-order modulation and high spectral efficiency transmission is the core engineering problem faced by the industry in 6G direct-connect satellite technology. With the support of the Ministry of Science and Technology’s key R&D program, the project team was led by China Telecom to carry out joint research and breakthroughs in core technologies such as dual-star collaborative transmission architecture, multi-beam anti-interference coding, multi-star and multi-beam collaborative transmission, and completed national production Development of load and terminal principle prototypes. This test simulated the technical feasibility of multi-satellite ground-based controlled beamforming under Doppler frequency shift, and completed microsecond-level multi-beam synchronization and air interface data merging and smooth playback of 8K video on the terminal side, exploring In the future, 6G terminals will be directly connected to satellite application scenarios, laying the foundation for the next step of providing a wide range of services for vertical industries. According to reports in November 2023, China Telecom has joined forces with Huawei, Honor, Xiaomi, OPPO, vivo, ZTE, and Meizu to promote the "flagship standard configuration" of consumer-grade satellite phones. For mobile phones to be directly connected to satellites, support domestic mainstream mobile phone terminal manufacturers to launch direct-to-satellite flagship models, and no less than 5 terminal models will be on the market before the end of 2024.

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