A Beidou-3 short message channel scheduling method and system

Abstract

The present invention relates to a Beidou No. 3 short message channel scheduling method and system. By initiating registration request, calculation, table search, broadcast, forwarding, update table, return receipt and other operations, a short message package based on intersatellite link is provided. The terminal-satellite-ground station coordinated transmission mechanism of road and satellite-ground links, through the generation of service lists for their respective objects in multiple satellites and ground central stations, allows the transmission mechanism to shield the peer device, ensuring the accuracy of short message data packets While transmitting in the channel, it also reduces the load on the terminal. The beneficial effects of the present invention are: the Beidou terminal card can realize the modes of single transmission and single reception, single transmission and multiple reception, multiple transmission and single reception and multiple transmission and multiple reception; each channel link is redundant with each other, and when some facilities fail or are damaged , it still has strong robustness.

Description

technical field [0001] The invention relates to the field of satellite message transmission, in particular to a Beidou-3 short message channel scheduling method and system. Background technique [0002] At present, the Beidou-3 system has been completed, and the proposed global short-message scheme and regional short-message scheme have been implemented. In the implemented global short-message system scheme, the overseas users of Beidou-3 are realized through the L-band uplink signal. The short message transmission of 40 Chinese characters (or 560 bits), while the overseas satellite completes the reception, despreading and demodulation and information processing of the short message, generates user receipt information, and feeds back to the user through the B2b frequency point. At the same time, through the inter-satellite link forwarding, the user's uploaded information and receipt information are sent to the ground central station. Through the visible star of the injectio...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of this solution is that the ground central station is limited to the territory, resulting in a small capacity of the global short message system and a large response delay, and the satellites can only rely on the inter-satellite link to realize the forwarding of short messages

[0005] The disadvantage of this solution is that the short message transmission is only through the GEO satellite, resulting in a small concurrent capacity of the regional short message system, and it does not fully utilize the collaborative communication capabilities of other constellations

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