A method for establishing inter-satellite link of Beidou navigation system

Abstract

The invention provides a method for establishing the inter-satellite links of a Beidou navigation system. The method is used for solving the problem in the prior art that the communication cannot be realized due to the fact that a satellite body in a link-establishing planning chart for the preset inter-satellite links of a Beidou navigation system in China breaks down. According to the technical scheme of the invention, firstly, a logical address is set for each satellite in the system. After that, the fault state information of a satellite is added into the information of the Beidou navigation system. In this way, the fault occurring moment of the satellite body can be shown. Based on the fault information delivery policy, all satellites in the system can acquire the state information of a faulty satellite. Meanwhile, the fault state information of the satellite is written into a temporary chart through updating the temporary chart of the link-establishing planning chart. Finally, the updated temporary chart and a node satellite chart are read, so that the new links of the Beidou navigation system are established. The establishing accuracy and the establishing timeliness of the inter-satellite links of the Beidou navigation system are improved.

Description

technical field [0001] The invention belongs to the field of aerospace measurement and control, and in particular relates to a method for establishing an inter-satellite link. Background technique [0002] The application of inter-satellite links in the Beidou navigation system has brought many new problems, among which the link establishment problem is particularly critical. Scholars at home and abroad have proposed many link-building algorithms based on inter-satellite links. These algorithms use off-line pre-computation for the calculation of link building to reduce the amount of real-time calculations on the satellite. [0003] All link calculations in this offline algorithm are performed offline. According to the periodicity and predictability of satellite operation, the satellite operation period is discretized into several time slices, and the topology results are considered to be different in each time slice. changes, calculated according to some optimization criter...

AI Technical Summary

Problems solved by technology

The offline algorithm usually used in navigation constellations only considers inter-satellite ranging, antenna pointing and other issues, and does not consider the impact of possible satellite failures on inter-satellite link building

Therefore, when some of the inter-satellite links in the constellation fail, the system performance will be significantly degraded, resulting in the interruption of a large number of existing links

However, if a fully dynamic link building algorithm is used, the regularity and predictability of satellite operation will be ignored, resulting in a sharp increase in routing costs

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