High-throughput satellite beam on-demand scheduling method based on service priority and rate adaptation

Abstract

The invention discloses a high-throughput satellite beam on-demand scheduling method based on service priority and rate adaptation. The method comprises the following steps: measuring the service flow and channel capacity of each beam cell in a downlink scene of a low-orbit high-throughput satellite system; establishing a nested optimization problem of a maximized adaptive rate regulation factor and a maximized system throughput according to the obtained data, and dynamically allocating the adaptive rate regulation factor and beam service time of each cell by taking average stay time and the number of beams as constraints; firstly, allocating high-priority services preferentially according to beam service time; secondly, allocating beam cells without same-frequency interference based on a longest queue principle; and finally, when spare beams exist, selecting cells with same-frequency interference according to a minimum same-frequency interference cost function to provide services. According to the method, the problem of resource waste of a predetermined full coverage mode in a downlink scene of a low-orbit high-flux satellite system is solved, and a plurality of cells can be covered by a small number of beams in a time division multiplexing mode.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to an on-demand scheduling method for high-throughput satellite beams based on business priority and rate adaptation. Background technique [0002] In recent years, traditional communication satellites have been unable to meet the growing demand for terrestrial broadband high-speed data traffic and all-weather seamless access. It is this demand for high-speed satellite communications that promotes the development of high-throughput satellites. Different from the larger single beam coverage of traditional communication satellites, high-throughput satellites use hybrid precoding technology to simply and efficiently generate multiple small-coverage, high-gain spot beams, which greatly enhances the reliability of satellite point-to-point communication links. Channel capacity and quality of service. In addition, the high-throughput multi-beam satellite also introduces fr...

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Problems solved by technology

[0004] Problem 1: The distribution of ground service traffic has a large tail and changes rapidly, resulting in a decrease in system energy efficiency

If the traditional predetermined full coverage mode is used to evenly distribute beams, it will result in wasted beam energy in some low-traffic cells or insufficient service in some high-traffic cells

[0006] Problem 2: The use of frequency reuse technology for scheduled full coverage will reduce the spectral efficiency of the system

However, once frequency reuse means that the bandwidth of the beam must be limited, the larger the "color number" of multiplexing, the smaller the bandwidth allocated to the beam, which will reduce the spectral efficiency and throughput of the system

[0008] Question 3: There are different types of ground services, and there are service order and priority issues

The traditional scheduled full coverage mode cannot dynamically allocate service time according to business priority and current channel status, which may lead to interruption of live broadcast services without priority services or serious shortage of data transmission service rates

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