Beam hopping communication method for low-orbit satellite communication system and satellite load equipment

Abstract

The invention belongs to the technical field of satellite communication, and discloses a low-orbit satellite communication system-oriented beam-hopping communication method and satellite load equipment, and the method comprises the steps: dividing beam-hopping loads into transparent beam-hopping loads and processing beam-hopping loads according to whether a gateway station is visible or not, carrying out beam hopping processing; selecting a hopping beam communication mode combining cluster coverage and single-user independent coverage according to user characteristics; and periodically broadcasting time information on the satellite, highly reliably receiving the time information on the satellite on the ground, carrying out deviation analysis and supplement, and carrying out feed link hopping beam synchronous communication on the satellite based on ground synchronization. According to the invention, the processing complexity of the hopping beam load is optimized by combining the transparent hopping beam and the hopping beam processing technology, and the use flexibility of the system is improved; and the complexity of the low-orbit network and the complexity and resource overhead of on-satellite load processing are simplified.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a beam-hopping communication method and satellite load equipment for a low-orbit satellite communication system. Background technique [0002] At present, traditional broadband satellite communication systems choose geostationary orbit (GEO) satellites to realize high-throughput Internet satellite communication services. And the demand for low latency continues to strengthen, and more and more commercial aerospace companies plan and implement low-orbit satellite constellations to achieve high-speed communication service capabilities on a global scale. For example, the new system of One Web Corporation (ONEWEB) and the Starlink system of Space Exploration Technology Corporation (SpaceX) all use LEO orbit to realize broadband satellite communication services. [0003] In order to improve the transmission rate between the satellite and the ground, the lo...

AI Technical Summary

Problems solved by technology

[0010](1) The prior art does not address satellite-to-ground synchronization, communication methods or systems in low-orbit hopping beam-hopping systems

[0011](2) The existing low-orbit satellite communication system has small coverage, insufficient resource utilization, and high complexity

[0012]The difficulty in solving the above problems and defects is: due to the high dynamic movement of low-orbit satellites, the characteristics of users in their coverage areas change rapidly, and their coverage will present dynamic characteristics, so Its beam hopping method is different from the existing geostationary orbit; in addition, low-orbit satellites are generally composed of large-scale constellations, and the weight and power consumption of a single satellite are limited. How to use satellite resources efficiently becomes the key; therefore, for low-orbit Realizing efficient beam-hopping communication has become a key and difficult point under the conditions of high motion characteristics, dynamic coverage characteristics, and weight and power consumption limitations of orbiting satellites.

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