5.5G, 6G core technology! New progress in China Mobile’s satellite communications: satellite core network successfully developed

According to news on February 1, following the "breakthrough" of Huawei's Mate50 series, direct connection of mobile phones to satellite communications has become a cutting-edge hot feature in the mobile phone industry.

Even now, many new phones from Huawei and Honor have implemented satellite call functions, based on China Telecom’s Tiantong satellite. This is currently the only satellite call system in orbit for domestic operators.

However, China Mobile has also been vigorously researching and developing satellite communications, and has recently made new progress. It has jointly developed a satellite core network and "satellite system" for on-board regeneration mode. ”, and completed the entire satellite ground test and space environment adaptability test.

According to the official introduction of China Mobile, mobile phone communication technology has been constantly evolving and iterating. From 1G to 2G, 3G, 4G, and now 5G, next is 5.5G (also called 5G-A), and then 6G.

Now 5.5G has completed demonstration construction in many regions in China, and this year it is planned to commercialize 5G-A three-carrier aggregation terminals on a large scale.

One of the core technologies of 5.5G and 6G is the "heaven and earth integrated" communication network.

Eventually, satellite Internet and terrestrial communication networks will be integrated in all directions. We can connect in any corner of the earth, including remote areas, deserts, oceans, mountains, sky and other three-dimensional spaces. Phone calls, texting, surfing the Internet.

This ubiquitous "ubiquitous connection" is the network foundation for the future Internet of Everything. What needs to be tackled now is the construction of satellite communication networks.

China Mobile adopts the on-board regeneration architecture under the direction of 3GPP NTN technology, which allows satellites to have modulation/demodulation, encoding/decoding, switching, routing and other processing capabilities in addition to signal amplification.

Such satellites have some or all base station functions, just like base stations on the ground. They can form a satellite communication network through inter-satellite links. .

In the on-board regeneration mode measured by China Mobile, the downlink rate of the satellite core network can reach 5Mbps, the uplink rate can reach 1Mbps, the on-board forwarding rate can reach 230Mbps, and the on-board forwarding delay is less than 1ms. The performance is in line with expectations.

It will be further optimized and verified in orbit in the future to provide broadband services for mass mobile phones and industry terminals.

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