Beta Angle 對衛星節能路由演算法的影響

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姓名

洪璽智(Si-Ji Hung) 查詢紙本館藏

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資訊工程學系

論文名稱

Beta Angle 對衛星節能路由演算法的影響
(Baee : Impact of Beta Angle on Satellite Energy Efficient Routing)

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至系統瀏覽論文 ( 永不開放)

摘要(中)

低地球軌道衛星 (LEO) 環繞地球運行。每次軌道週期包括日光週期
和陰影週期。由於衛星電池在陰影週期無法充電，較長的陰影週期會
導致較大的放電深度 (DoD)，從而減少電池壽命。為了延長衛星網絡
的壽命，我們提出了一種節能的路由演算法 (Baee)。我們的方法降低
處於陰影週期的衛星傳輸封包的機率。為了應對突發流量和擁塞，我
們平衡網絡的負載。模擬結果表明，我們的方法不僅保持低的放電深
度，並實現可接受的端到端延遲。

摘要(英)

Low earth orbit satellite (LEO) orbits the earth. Each orbit cycle consists of the sunlight period and eclipse period. Since satellite battery can not be charged during eclipse, long eclipse period results in deep depth of discharge (DoD), and hence reduces battery lifetime. To prolong the satellite network lifetime, we propose an energy efficient routing algorithm. Our algorithm lower the probability of the satellites in eclipse to relay packets. To handle the burst traffic and congestion, we balance network loading. Simulation result showed our method maintains not only low DoD but also acceptable end-to-end delay.

關鍵字(中)

★ 低軌衛星
★ 電池
★ 路由
★ Beta angle

關鍵字(英)

★ Satellite network
★ Low earth orbit satellites
★ Energy-efficient routing
★ Beta angle

論文目次

中文摘要 i
Abstract ii
致謝 iii
Contents iv
List of Figures vi
List of Tables viii
1 Introduction 1
2 Related Work 4
2.1 Routing in Satellite Networks . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Energy-efficient routing in Satellite Networks . . . . . . . . . . . . . . . 5
3 System Model 8
3.1 Satellite network topology . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Methodology 11
4.1 Charging Opportunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Analysis of Solar Beta Angle . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Hybrid Routing Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1 Centralized Approach . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.2 Distributed Approach . . . . . . . . . . . . . . . . . . . . . . . . 20
5 Performance Evaluation 23
5.1 Simulation Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2.1 Depth of Discharge . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2.2 Average hop count and delay . . . . . . . . . . . . . . . . . . . . 26
5.2.3 Link Utilization . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6 Conclusion 33
Bibliography 34

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指導教授

張貴雲(Guey-Yun Chang)

審核日期

2024-7-23

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