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Method for distributing inter-satellite chains of low-earth-orbit satellite network

A technology of inter-satellite link and distribution method, applied in the direction of radio transmission system, electrical components, transmission system, etc.

Active Publication Date: 2014-10-01
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

The invention well combines the effectiveness and stability of the inter-satellite link, and solves the problem of inter-satellite link allocation under the condition of limited beams on the low-orbit satellite network

Method used

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  • Method for distributing inter-satellite chains of low-earth-orbit satellite network
  • Method for distributing inter-satellite chains of low-earth-orbit satellite network
  • Method for distributing inter-satellite chains of low-earth-orbit satellite network

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Experimental program
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Embodiment Construction

[0057] The main process of the comprehensive weighted link allocation method based on link stability is as follows:

[0058] Step 1: Time slice division

[0059] In order to simplify the inter-satellite visibility processing and transform the dynamic topology of the satellite network into a series of static topologies, we use the periodicity of the satellite network to divide the system operation period T into n time segments, namely [t 0 = 0, t 1 ], [t 1 , t 2 ], [t 2 , t 3 ]...[t n-1 , t n =T], and stipulate:

[0060] (1) The establishment and disconnection of the inter-satellite link both occur at the time point t 1 , t 2 , t 3 ......t n ;

[0061] (2) In the time slice [t i , t i+1 ], the topology of the satellite network is fixed, and the inter-satellite visibility remains unchanged.

[0062] Step 2: Inter-satellite visibility analysis

[0063] After the division of time slices is completed, the inter-satellite visibility in each time slice is analyzed res...

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Abstract

The invention relates to a method for distributing inter-satellite chains of a low-earth-orbit satellite network. The comprehensive weighting distribution method well solves the problem that a satellite needs to make a choice when selecting visual satellites, and different communication needs can be met by changing a weighting coefficient through the comprehensive weighting method based on inter-satellite distance, the distance change rate, visual time length and remaining channel (or bandwidth) resources. The comprehensive weighted chain distribution method based on chain stability is based on comprehensive weighting, and the stability of the inter-satellite chains is improved as much as possible through the method of increasing the average connection degree of the satellite network. The problem of inter-satellite chain distribution of low-earth-orbit satellites under the condition of limited wave beams is solved, and the built satellite network has small communication time delay when operating, is low in chain conversion and high in on-satellite resource utilization rate and has good chain stability.

Description

technical field [0001] The invention relates to an inter-satellite link allocation method applied to a low-orbit satellite network. The invention comprehensively considers the geometric characteristics of the low-orbit satellite network topology and the communication quality of the inter-satellite link, and uses the comprehensive weighting idea to realize the inter-satellite link The allocation of the inter-satellite link is improved by considering the link stability on the basis of comprehensive weighting. This method reduces the link delay as much as possible, reduces the switching times of the inter-satellite link, and improves the overall network The invention relates to the stability of topology structure, which belongs to the technical field of satellite communication. Background technique [0002] Like the terrestrial communication network, the satellite communication network is also undergoing rapid changes and development. The traditional voice service will account ...

Claims

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Application Information

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IPC IPC(8): H04B7/185
Inventor 孙力娟周泽华王汝传周剑肖甫叶晓国郭剑
Owner NANJING UNIV OF POSTS & TELECOMM
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