Huawei Mate 60 mobile phone successfully tested satellite Internet and reached a downlink rate of 5Mbps per second in China Mobile's 'Star System'

On January 26, according to official news from China Mobile, China Mobile Research Institute and industry partners recently jointly developed the satellite core network and "satellite system" for the on-board regeneration mode, and completed the whole-satellite ground test and space testing. Environmental suitability testing.

According to reports, the spaceborne core network is used to provide on-orbit data forwarding services in on-board regeneration mode and is one of the important equipment for low-orbit satellite Internet. Facing the low-cost and high-reliability requirements of satellite Internet, China Mobile's satellite core network is based on the 5G core network SBA architecture to adapt to space environments such as space radiation, vacuum, and alternating hot and cold conditions. The design is based on domestic industrial-grade components and domestic Linux operations. The system's highly reliable, flexible, on-orbit reconfigurable software and hardware systems enable independent controllability of the spaceborne core network.

▲ Picture source "China Mobile Research Institute" public account, the same below

China Mobile said that for the characteristics of low-orbit satellites such as fast movement and wide coverage, the satellite-borne core The network optimizes basic 5G processes, including session management, mobility management, QoS guarantee and other capabilities, to achieve efficient satellite-to-ground networking. At present, the spaceborne core network has completed environmental tests such as mechanics, high and low temperature, thermal vacuum, electromagnetic compatibility, aging and performance tests in wireless environments to meet on-orbit operating conditions. The test simulated the satellite operation trajectory at an orbital altitude of 550Km. Together with partners such as Shanghai Microsatellite, Huawei, Aipulu, and Fusion Technology, we built a test terminal, ground 5G base station, ground gateway station, and satellite-borne wireless The end-to-end link from the transceiver to the satellite core network verifies the applicability of low-orbit satellite communications in wired and wireless conditions in high dynamics, large delay, narrow beam and IP over CCSDS transmission environments. As can be seen from China Mobile's official picture, the test terminal is a Huawei Mate 60 series mobile phone, which already supports Beidou satellite two-way communication. In the actual measured on-board regeneration mode, the downlink rate of the satellite core network can reach 5Mbps (note: 1000 times is calculated as 625KB/s, 1024 times is calculated as 640KB/s), and the uplink rate can reach 1Mbps , the on-board forwarding rate reaches 230Mbps, the on-board forwarding delay is less than 1ms, the performance is in line with expectations, and will be further optimized and verified in orbit to provide broadband services for mass mobile phones and industry terminals.

▲The satellite-borne core network has an uplink transmission of 1Mbps

▲The satellite-borne core network has a downstream transmission of 5Mbps

China Mobile stated that on-board regeneration mode is an important technical direction of the 3GPP R19 NTN standard. This test shows that the spaceborne core network meets the requirements for on-orbit flight, achieves end-to-end full link connectivity and stable data transmission, and verifies the direct connection of mobile phones based on the on-board regeneration mode. The technical feasibility of low-orbit satellites and the correctness of the satellite-to-ground core network architecture are of great significance to the research and application promotion of mobile phone direct connection to low-orbit satellites and the evolution of standards.

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