Broadband mobile communication method and system based on multi-beam GEO satellite

Abstract

The invention discloses a broadband mobile communication method based on a multi-beam GEO satellite. The broadband mobile communication method based on the multi-beam GEO satellite mainly comprises the steps that spot beams at the Ka frequency band are adopted by NG+1 bidirectional feed links between a satellite-borne device and a ground station device, so that space division multiplexing is achieved for NG+1 times; a cellular network with NB cells is formed through NB bidirectional user links between the satellite-borne device and NT mobile user terminals based on an NB-beam satellite antenna, and space division multiplexing is achieved for NB / 4 times with every four cells as a group, so that a 260 MHz bandwidth resource can be shared. The invention further discloses a broadband mobile communication system based on the multi-beam GEO satellite. According to the broadband mobile communication method and system based on the multi-beam GEO satellite, any one of the NT mobile user terminals can serve as an independent multimedia communication terminal as well as a local area network connected with a public Internet and can have access to a remote URL through the satellite links of the system, and an Internet service on the level similar to the 4G mobile communication level can be provided for a large number of people on various vehicles.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a broadband mobile communication method and system based on a multi-beam GEO satellite. Background technique [0002] The broadband cellular network mobile communication system based on GEO (Geosynchronous Orbit, English abbreviation of Geostationary Orbit) or LEO (Low Earth Orbit, Low Earth Orbit) satellite has unique advantages that cannot be compared with two ground networks: one is Its wide-area seamless coverage capability can support Internet applications in vehicles such as ships, trains, coaches, and airplanes; the second is that its routing can span thousands of kilometers in a single hop, which affects the quality of real-time multimedia services in Internet applications. Guarantee is very favorable; therefore, various satellite cellular network mobile communication systems are still in vigorous development. [0003] However, the LEO satellite broadba...

AI Technical Summary

Problems solved by technology

However, there are two key issues in the development of broadband mobile communication systems based on GEO satellites: one is how to realize on-board signal processing and on-board switching with a large user capacity; the other is how to support Internet services

In principle, this kind of system can support broadband Internet applications, but in fact, the backhaul route is still through the external interaction mode of the ground network, so that a large number of user backhaul information floods into the network center, which is very easy to cause congestion, so that the two-way Internet cannot be truly realized. business, so it is mainly a single receiving station serving TV or multimedia broadcasting

Hughes later improved this system by changing the ground network backhaul to satellite link backhaul (see translation by Li Junping and Wang Qi, "Review and Prospect: 2011 in the Eyes of Overseas Communications Satellite Industry Executives", Satellite and Internet, 2012.3), the cost of user terminals has risen sharply, which seriously limits its wide application

At the same time, since the satellite communication system does not combine multi-beam satellite antenna technology, its frequency resources and user capacity are very limited, and it is impossible to give full play to the competitive advantages of satellite communication

[0008] Looking at the current situation of the development of broadband satellite communications, it can be seen that the occasions where satellite communications really play an important role are mainly in military communications, emergency communications and maritime communications, and it still has a great potential in civilian mobile communications. It is to support broadband Internet applications including real-time multimedia services on trains, long-distance buses, airplanes, ships and other vehicles and emergency communication vehicles. It should have unique advantages, but it has not been well utilized so far. Large market and social needs

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