Adaptive transmission method for broadband satellite communication system

Abstract

The invention provides an adaptive transmission method for a broadband satellite communication system. The method comprises the following steps: allocating carrier and time slot resources according to the receiving capacity and the channel conditions of a target terminal, determining a downlink frame structure, extracting to-be-sent business data, framing and sending the business data, then, realizing receiving synchronization by a ground target terminal through a synchronous time slot, analyzing a signaling time slot to obtain a starting business time slot sequence number, an ending business time slot sequence number, a carrier rate, a modulation mode, an encoding mode and a data length, and finally, analyzing a corresponding business time slot according to the carrier rate, the modulation mode, the encoding mode and the data length to obtain transmission data to complete adaptive transmission. Compared with the prior art, a download variable carrier rate transmission method is used to adaptively and dynamically adjust the carrier rate according to the receiving capacity and the channel conditions of the target terminal, so that the problems that fixed carrier transmission is difficult to meet the transmission demands of different target terminals and that the resource utilization rate is low are solved.

Description

technical field [0001] The invention relates to a downlink transmission method for a broadband satellite communication system, in particular to an adaptive transmission method for a broadband satellite communication system. Background technique [0002] The main goal of the broadband satellite communication system is to provide voice, data, image, video and other multimedia services as well as high data rate Internet access services for users in the wide area coverage area through satellites. Most broadband satellite communication systems use Ku and Ka frequency bands, and use multi-point beams and frequency multiplexing technologies to increase system capacity. The United States and Europe are pioneers in the application of broadband satellite communications. The users they serve include home users, enterprise users, government users, and users of high-speed mobile platforms such as aircraft and high-speed rail. They are widely used in broadband access, base station relay, ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a downlink variable carrier rate transmission method, which can adaptively adjust the carrier rate dynamically according to the receiving capability and channel conditions of the target terminal, and solve the problem of fixed Carrier transmission is difficult to meet the transmission requirements of different target terminals and the resource utilization rate is low. An adaptive transmission method for broadband satellite communication systems

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