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Reporter Chen Zhou) A few days ago, the top ten super projects of central enterprises in 2023 were officially released, and China Telecom's "world's first mobile phone direct connection to satellite operation-level products was successfully selected for commercial use".
Nowadays, the "mobile phone era" that can realize the popularization of satellite mobile communication has come, and China Telecom officially provided Tiantong satellite communication services to all sectors of society last year, and launched Tiantong satellite**, mobile phone direct connection to satellite" services. In 2024, China Telecom will continue to deepen the field of satellite communications, provide integrated communication guarantee for space, ground and air, and benefit the country and the people.
Promote satellite calls into ordinary people's homes
Satellite communication is the communication between two or more earth stations using an artificial earth satellite as a relay station. The characteristics of satellite communication are: First, it has a large range, and as long as it is within the coverage of the radio waves emitted by the satellite, communication can be carried out between any two points. Second, it has high reliability and is not susceptible to land disasters. Third, it is more economical and flexible, which can realize broadcasting services and multiple access communications, and the same channel can be used for different directions or different intervals.
On September 8, 2023, China Telecom officially launched the mobile phone direct satellite service, which is the world's first public consumer mobile phone directly connected to satellite two-way voice call and SMS sending and receiving communication services. At present, first-line domestic mobile phone brands, including OPPO, vivo and Honor, have begun to cooperate with China Telecom in the field of satellite communication technology. It is expected that in the middle and late stages of this year, there will be a number of domestic mainstream brand terminal products equipped with satellite communication functions.
In addition, in terms of terminals, China Telecom has also successively launched self-developed satellite mobile terminals for the public, such as Tianyi Poltton S9 and other mobile phones with satellite communication services, so that satellite calls can truly enter the homes of ordinary people.
Industry insiders said that the satellite communication function will become an important symbol of product differentiation and help enhance the added value of domestic flagship mobile phones. When users choose a mobile phone, in addition to considering factors such as **, performance and design, satellite communication capabilities will also become an important basis for their choice.
Create high-quality services to help with emergency support
Satellite communication is one of the most effective means of emergency communication, and the satellite communication terminal is the only communication equipment that can be relied on in the first time of disaster.
In recent years, "Tiantong" has shown its prestige, and China Telecom has responded to emergencies one after another through Tiantong satellite-related services, so that the people can truly feel the all-round emergency communication support of "sea, land and air".
Not long ago, in the disaster in Jishishan County, Linxia Prefecture, Gansu Province, China Telecom Tiantong Satellite not only effectively guaranteed the emergency communication command of the rescue force, but also allowed the affected people to get in touch with the outside world and report safety to their families in distant places. At the same time, China Telecom also opened the Tiantong intelligent dispatching platform for the Ministry of Emergency Management to improve the efficiency of emergency command and emergency response, and help the smooth development of earthquake rescue work in an all-round way.
In March last year, the SCO Kunming Marathon started on the shore of Dianchi Lake in Kunming, Yunnan Province, as the designated unit for the satellite live broadcast of the entire event, China Telecom Yunnan Company configured two satellite vehicles in the C band and Ku band at the live broadcast site, and connected with CCTV through the Asia 7 and Asia 5 satellites to ensure the live broadcast of the race site in real time.
In August last year, Beijing-Tianjin-Hebei and other places suffered floods and geological disasters. From supporting flood control and disaster relief command to building emergency communication bridges, China Telecom's high-quality and reliable satellite communication services have also provided strong support for the development of various tasks.
Satellite communications applications still have a long way to go
A few months ago, Yang Lingcai, general manager of China Telecom Satellite Corporation, mentioned that today's satellite communication systems have long had the problem of competing with each other and developing independently due to different use scenarios, network characteristics, and operating entities. Due to the many practical differences between satellite-ground networks, the construction and operation of a "space-ground integrated network" will inevitably face problems such as network heterogeneity, different standards, and fragmented operations. However, with the gradual maturity of 5G NTN technology and the acceleration of the 6G era, the path of integration of space and earth is becoming clearer.
Therefore, in 2024, China Telecom will first strengthen technological innovation in satellite information and communication applications; At the same time, based on the four major scenarios of land, sea, air and space, we will actively build a product business system that integrates air, space and ground; In addition, it is necessary to adhere to openness and cooperation, mutual benefit and win-win results; Finally, it is necessary to speed up the construction of Tiantong satellite communication system and space information infrastructure, promote the integrated development of space-ground integrated network, gather industrial ecology, expand the "Tiantong No. 1" industry, empower thousands of industries, and put the finishing touch to the construction of digital China.