Common-view data transmission and time synchronization method and system based on Beidou RDSS

Abstract

The invention relates to a common-view data transmission and time synchronization method and system based on Beidou RDSS. The method comprises the steps that the common-view data transmission and timesynchronization system comprising a common-view reference station and a common-view receiver is preset and the common-view reference station initiates a common-view command message; after receiving the common-view message, the common-view receiver sends a type 1 common-view query message or type 2 common-view query message; after receiving the common-view query message, the common-view referencestation rapidly matches a common-view satellite number; a current common-view satellite number time difference model is computed, and a common-view data message is sent according to a preset frequency, and the step is carried out cyclically; the common-view receiver receives the common-view data message, carries out compensation output on a current common-view satellite number PPS, and carries outthe step cyclically; if a current common-view satellite of the common-view reference station is invalid, the common-view reference station reinitiates the common-view command message; and if the current common-view satellite of the common-view receiver is invalided, the common-view query message is resent. The method and the system are applicable to Beidou first generation RDSS low frequency andlow rate communication channels.

Description

technical field [0001] The present invention relates to a common-view data sharing method, in particular to a common-view data transmission and time synchronization method and system based on Beidou RDSS. Background technique [0002] The realization of common-view timing requires the interaction of common-view data through the communication network. Regional communication networks such as high-altitude (such as between aircraft and aircraft, between aircraft and the ground) and in the field (between field equipment) are often not covered, which limits common-view Deployment range of timing receivers. Beidou generation RDSS (satellite radio determination service) short message service is suitable for various environments, and has the characteristics of wide coverage, simplicity, convenience, speed, and reliability. Using Beidou generation RDSS short message service can increase the size of the common-view timing receiver The deployment scope of the common-view timing receiv...

AI Technical Summary

Problems solved by technology

[0002] The realization of common-view timing requires the interaction of common-view data through the communication network. Regional communication networks such as high-altitude (such as between aircraft and aircraft, between aircraft and the ground) and in the field (between field equipment) are often not covered, which limits common-view Deployment range of timing receivers

Beidou first-generation RDSS (satellite radio determination service) short message service is suitable for various environments, and has the characteristics of wide coverage, simplicity, convenience, speed, and reliability. Using Beidou first-generation RDSS short message service can increase the size of the common-view timing receiver The deployment scope of the common-view timing receiver is simplified, but the Beidou-generation RDSS is constrained by the low communication channel and the small amount of communication data at a time. The transmission and interaction of the traditional common-view message protocol occupy a large amount of Beidou-generation RDSS. Communication resources, therefore, it is necessary to improve the transmission protocol and interaction mode of the traditional common-view message to realize low-frequency, low-rate transmission and timing of common-view data

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