On November 10, China Telecom released own-developed 5G satellite dual-mode mobile phone, Tianyi Platinum S9, was officially released at the 2023 Digital Technology Ecology Exhibition.
Satellite communications may show two technological evolution routes:
At the terminal level, direct connection to satellites has gradually evolved from dedicated terminals to smartphones.
At the satellite equipment level, from high-orbit satellites to connecting low-orbit satellites, from short messages to voice calls and network connections, communication capabilities continue to iteratively improve.
Dual-mode technology is evolving rapidly, and mobile phone terminals are expected to rapidly increase in volume. Dual-mode technology makes use of the established satellite mobile communication system and the existing satellite communication technology system to add the communication functions of traditional satellite communication terminals to mobile phones through chip miniaturization and radio frequency antenna optimization, making mobile phones the dual-mode module terminal for both terrestrial mobile communications and satellite mobile communications.
At present, many public companies are deploying satellite communications, and satellite communications may become standard equipment for mobile phones.
Low-orbit satellites shall be connected, and 3GPPNTN technology helps the integration of space and earth. Since the performance indicators of “mobile phone direct connection satellite” such as service rate and delay are closely related to the orbit altitude, low-orbit satellites have greater advantages than high-orbit satellites in terms of system capacity, user speed, service delay, etc., and are the future ” The development direction of mobile phone direct connection to satellite”.