Trunking communication method and device of low-orbit constellation satellite communication system

Abstract

The invention discloses a trunking communication method of a low-orbit constellation satellite communication system, which comprises the following steps of: setting a low-orbit trunking communication frame structure: aiming at a trunking communication service of the low-orbit constellation satellite communication system, adding channel associated signaling on a service channel or an uplink shared channel, controlling a communication link, and setting a low-orbit trunking communication frame structure; synchronization between the satellite terminal and the satellite is realized; a low-orbit trunking communication switching process: satellite terminals are switched in the base stations under the same gateway station or among the base stations under the same gateway station; in the switching process, the cluster controller selects the matched frequency resources from the overall situation for allocation, and resource allocation and switching negotiation between the cluster controller and the base station are achieved. According to the invention, the frame structure meeting the rapid synchronization requirement is added on the service channel, the link is controlled, and rapid synchronization is realized; and a communication flow between the cluster controller and the base station is also designed, so that the functions of resource allocation, switching negotiation and the like between the cluster controller and the base station during the cluster service are realized.

Description

technical field [0001] The invention relates to the technical field of low-orbit constellation satellite communication, in particular to a cluster communication method and device for a low-orbit constellation satellite communication system. Background technique [0002] 1. Low-orbit satellite communication system [0003] The low-orbit constellation satellite communication system is a satellite communication system that transmits signals through the low-orbit constellation. It has the characteristics of wide bandwidth, global coverage, and low delay. At present, the low-orbit constellation satellite communication systems that have been completed or put into operation in the world mainly include Iridium, GlobalStar, starlink, O3B, OneWeb, Telesat, etc. Although my country also has low-orbit systems such as Hongyun and Hongyan, they are still in the initial stage of construction. Generally speaking, the low-orbit constellation satellite communication system consists of three ...

AI Technical Summary

Problems solved by technology

[0023] However, the existing cluster technologies are based on ground mobile communication and high-orbit satellite communication systems, and are not suitable for low-orbit constellation satellite communication systems

The speed of low-orbit constellation satellites is fast, the change rate of time offset and frequency offset is large, and the communication link is highly dynamic. The synchronization problem between satellite terminals and high-speed satellites needs to be solved urgently

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