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A Stochastic Network Calculus Method for Satellite Network Performance Evaluation

A technology of random network and satellite network, applied in the field of satellite wireless communication, which can solve the problems of complex and changeable satellite channels, degraded service quality of data traffic flow, etc.

Active Publication Date: 2020-06-12
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a random network calculation method for satellite network performance evaluation, which solves the problem of data traffic flow due to the complex and changeable satellite channel, which is affected by free space, Doppler frequency shift and noise. To solve the problem of quality degradation, a cross-layer end-to-end inter-satellite link performance analysis method based on random network calculus is proposed, that is, to analyze the random performance indicators of inter-satellite channels: link delay, backlog, etc.

Method used

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  • A Stochastic Network Calculus Method for Satellite Network Performance Evaluation
  • A Stochastic Network Calculus Method for Satellite Network Performance Evaluation
  • A Stochastic Network Calculus Method for Satellite Network Performance Evaluation

Examples

Experimental program
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Embodiment 1

[0057] combine Figure 1 to Figure 9 A stochastic network calculus method for end-to-end performance evaluation of a cross-layer satellite network whose arrival data flow is random data conforming to Poisson distribution, figure 1 In the cross-layer satellite communication system shown, if ground user A wants to transmit information to ground user B, it needs to be forwarded to the medium-orbit satellite through the low-orbit satellite, then forwarded through the medium-orbit satellite, and finally reaches the target low-orbit satellite and delivered to ground user B. figure 2 for figure 1 Mapped floor plan. image 3 It is a schematic diagram of the data flow in the data transmission process.

[0058] This method is implemented by the following steps:

[0059] 1A. The random arrival curve and boundary function of a single data flow conforming to the Poisson distribution are shown in formula (1.1):

[0060]

[0061] In formula (1.1), the arrival curve of a single random...

Embodiment 2

[0124] combine Figure 1 to Figure 3 , Figure 10 to Figure 14 The random network calculus method for the end-to-end performance evaluation of the cross-layer satellite network, which shows that the arriving data stream is random data conforming to the self-similar distribution, is implemented by the following steps:

[0125] 2A. The random arrival curve and boundary function of a single data flow conforming to the self-similar distribution are shown in formula (2.1):

[0126]

[0127] In formula (2.1), the arrival curve of a single random data stream conforming to Poisson distribution is Where m represents the average arrival rate, σ refers to the variance coefficient, and H represents the Hurst coefficient. In this embodiment, m=15kb / s, σ=m / 0.5, and H takes a value within the range of 0.5-0.95.

[0128] The boundary function of the arrival curve of a single random data stream conforming to the self-similar distribution is in b f =θ, in this embodiment θ=θ 1 = 0.1...

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Abstract

The invention relates to a random network calculation method for satellite network performance evaluation. The method is characterized in that if a ground user A of a cross-layer satellite communication system is required to transmit information to a ground user B, the information is required to be forwarded to a medium-orbit satellite via a low-orbit satellite, and is forwarded by the medium-orbit satellite to reach a destination low-orbit satellite in order to be delivered to the ground user B. The method solves the problem of a decrease in data service flow service quality due to a complex and changeable satellite channel and the influence of free space, Doppler frequency shift and noise. The cross-layer end-to-end inter-satellite link performance analysis method based on random network calculation analyzes the random performance indexes, such as link delay, backlog and the like, of the inter-satellite channel.

Description

technical field [0001] The invention relates to a random network calculus method for satellite network performance evaluation, is a random network calculus-based cross-layer satellite network end-to-end inter-satellite link performance evaluation method, and belongs to the technical field of satellite wireless communication. Background technique [0002] Due to the constraints of economy and technology, the terrestrial communication network only covers some parts of the earth's surface. With the rapid growth of the demand for mobile communication services, how to cover areas that the terrestrial communication network cannot cover, especially in some special areas, such as Providing effective network communication services has become an urgent problem to be solved in islands, mountains and deserts, and even in areas where ground communication has been destroyed after disasters. With the continuous progress of satellite technology, satellite communication system has become a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/309H04B17/391H04B7/185
CPCH04B7/18521H04B17/309H04B17/391
Inventor 底晓强李锦青祁晖从立钢王敏毕琳任唯武杨华民姜会林
Owner CHANGCHUN UNIV OF SCI & TECH