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Destruction-resistant routing method oriented on GEO/LEO double-layer satellite network

A double-layer satellite network and satellite technology, applied in the field of satellite communication, can solve the problems of high failure rate and severe failure, achieve the effect of accurate evaluation and reduce the number of excitations

Active Publication Date: 2017-05-24
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

At the same time, because the actual environment of satellite operation is too harsh, the current satellite operation process has a high failure rate

Method used

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  • Destruction-resistant routing method oriented on GEO/LEO double-layer satellite network
  • Destruction-resistant routing method oriented on GEO/LEO double-layer satellite network
  • Destruction-resistant routing method oriented on GEO/LEO double-layer satellite network

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Embodiment Construction

[0027] The present invention is described in further detail now in conjunction with accompanying drawing. First of all, the GEO / LEO double-layer satellite network architecture takes advantage of the large coverage area of ​​GEO satellites and adopts an architecture with redundant GEO layers covering all LEOs to provide unified routing calculations for the entire LEO. Such as figure 1 As shown, the specific two-tier satellite network architecture is:

[0028] The LEO layer refers to the Iridium system, with a total of 66 LEO satellites, divided into 6 orbits, and each orbit has 11 LEO satellites;

[0029] In the GEO layer, 4 GEO satellites are evenly distributed over the equator. The specific coordinates are: the latitude is 0°, the longitude is 30°, 120°, 210°, and 300°, and the altitude is 35786km. Since 3 GEOs can cover the whole world, 4 GEOs can be set to have the redundancy of one GEO. Even if one GEO fails, the entire GEO layer can continue to complete the task.

[0030...

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Abstract

The invention discloses a destruction-resistant routing method oriented on a GEO / LEO double-layer satellite network, and a GEO / LEO double-layer satellite network architecture adopted in the method. With the idea of hierarchical clustering, routing table calculation of an LEO in a covering domain is managed by taking a GEO layer with redundancy as a management layer of an LEO layer and a GEO as a cluster head, so that the destruction-resistant function of the architecture is sufficiently played; simultaneously, a link state evaluation model is designed; therefore, the purpose of comprehensively evaluating the link state by setting different variables in different angles can be achieved; rerouting of the GEO layer to the whole satellite network is promoted by setting six threshold values for the link state, so that the purposes of realizing the destruction-resistant performance and avoiding congestion can be achieved; therefore, a satellite destruction-resistant routing strategy has better transformation application prospect in the fields of aerospace and social economy; and the destruction-resistant routing method belongs to the technical field of satellite communication.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and relates to an indestructible routing method applied to a double-layer satellite network, specifically a GEO / LEO double-layer satellite network architecture. Background technique [0002] With the rapid development and application of aerospace technology, satellites have become the main means and means of acquiring, integrating, distributing, and processing space information or resources. The satellite network is not limited by the geographical environment and can provide long-distance communication and broadband access for ground users around the world. It is an important part of the future information infrastructure. At the same time, in order to comprehensively improve the development level of my country's aerospace science and technology and shorten the gap with developed countries, my country's 863 aerospace field takes the research of satellite network as an important res...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/755H04L12/715
Inventor 孙力娟张胜东周剑韩崇王娟郭剑肖甫王汝传
Owner NANJING UNIV OF POSTS & TELECOMM
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