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以作者查詢圖書館館藏 、以作者查詢臺灣博碩士 、以作者查詢全國書目 、勘誤回報 、線上人數：82 、訪客IP：18.118.12.222
姓名 黃麗霛(Li-Ling Huang) 查詢紙本館藏 畢業系所 通訊工程學系 論文名稱 使用多波束之同步軌道衛星與低軌道衛星網路頻譜資源共享協調
(Coordinative Spectrum Sharing for GEO and LEO Satellite Networks Using Multi-Beam)相關論文 檔案 [Endnote RIS 格式]
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至系統瀏覽論文 (2025-1-17以後開放)
摘要(中) 隨著5G行動通訊系統發展，協調同步軌道衛星 (Geosynchronous Equatorial Orbit，GEO) 和低軌道衛星 (Low Earth Orbit，LEO) 成為未來非地面網路 (Non-Terrestrial Networks，NTN) 無線通訊資源節約之方案。當共享頻譜資源之LEO以及GEO衛星服務之用戶設備 (User Equipment，UE) 數量增加，衛星之間的在線干擾 (in-line interference) 是需要解决之問題。衛星可以利用頻率複用 (frequency reuse) 中的圓極化 (circular polarization) 平面天線陣列形成多個互不干擾之波束 (multiple beams)。本研究考慮具有波束跳躍 (beam hopping) 現象之多波束LEO和GEO衛星，通過協調安排衛星網路之波束跳躍方案，最小化在線干擾並提升整體系統容量。
本研究針對地球移動波束 (earth moving beam) LEO網路，藉由統計LEO衛星系統之使用頻率，針對多波束之GEO提出八種不同下行無線動態頻譜共享資源分配機制，產生跳頻矩陣 (frequency hopping matrix)。多波束之GEO衛星與GEO 設備裝置根據該矩陣進行同步跳頻，可降低LEO與GEO之間在線干擾，達成提升整體衛星系統傳輸效能之目標。模擬評估所提出之機制對於系統容量、LEO與GEO內UE間存取資源之公平性，以及所有方案之時間成本，驗證從協調中獲得之優勢。根據模擬結果，本研究提出之貪婪方案之效能僅與最優方案差距0.51%，且具有更好之系統公平性及更少之時間消耗。摘要(英) With the development of fifth generation mobile networks, coordinating the geosynchronous equatorial orbit (GEO) satellites and low earth orbit (LEO) satellites becomes a non-terrestrial network (NTN) solution for future radio communication which requires resource saving scheme. With the increasing number of user equipment (UEs) which are served in the footprints of LEO and GEO satellites simultaneously, in-line interference between these two satellites is an important issue need to be resolved especially when the spectrum resource is shared. A satellite could utilize circularly polarized planar antenna array and the frequency reuse technique to form multiple beams without inter-beam interference. This thesis considers multi-beam LEO and GEO satellites with beam hopping phenomenon to minimize in-line interference and improve the overall system capacity by coordinating beam hopping patterns of two satellite networks.
This thesis proposes eight different downlink wireless dynamic spectrum sharing resource allocation schemes for multi-beam GEO to generate the frequency hopping matrix according to the frequency hopping pattern of earth-moving LEO satellite. Multi-beam GEO satellites and GEO user equipment perform synchronous frequency hopping according to this matrix, which can reduce the in-line interference between LEO and GEO, and achieve the goal of improving the capacity of overall satellite system. The proposed schemes are simulated and evaluated in terms of system capacity, fairness between LEO and GEO UEs, and time cost to verify the advantages obtained from coordination. Simulation results show that the system capacity of the proposed greedy scheme is only 0.51% worse than that of the optimal scheme, and also has better system fairness and less time consumption.關鍵字(中) ★ 第五代行動通訊 (5G)
★ 波束跳躍
★ 頻率複用
★ 同步軌道衛星
★ 低軌道衛星
★ 多波束
★ 非地面網路
★ 衛星系統在線干擾關鍵字(英) ★ fifth generation mobile networks (5G)
★ Frequency hopping
★ Frequency reuse
★ Geosynchronous Equatorial Orbit (GEO)
★ Low Earth Orbit (LEO)
★ Multi-beam
★ Non-Terrestrial Networks (NTN)
★ Satellite In-line Interference論文目次 中文摘要 i
ABSTRACT ii
CONTENTS iv
LIST OF FIGURES v
LIST OF TABLES vi
1 INTRODUCTION 1
2 RELATED WORK 4
3 BACKGROUND 6
3.1 Non-Terrestrial Network (NTN) 6
3.2 Earth fixed cells and Earth moving cells in NTN LEO 7
3.3 Circular polarization 8
3.4 Frequency Reuse Factor (FRF) 9
4 PROPOSED SCHEMES 11
4.1 LEO Satellite Information Generation 12
4.2 Fixed Scheme (FS) 20
4.3 Random with Duplication Scheme (RWDS) 21
4.4 Random without Duplication Scheme (RWODS) 21
4.5 LEO Favor Scheme (LFS) 22
4.6 GEO Favor Scheme (GFS) 25
4.7 Greedy Scheme (GS) 26
4.8 Optimal with Duplication Scheme (OWDS) 28
4.9 Optimal without Duplication Scheme (OWODS) 28
4.10 Example of eight schemes 30
5 PERFORMANCE EVALUATION 34
5.1 Simulation Result 35
6 CONCLUSIONS 39
7 FUTURE WORK 40
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[13] H. Wang, C. Wang, J. Yuan, Y. Zhao, R. Ding, and W. Wang, “Coexistence downlink interference analysis between LEO system and GEO system in Ka band,” in Proc. of IEEE/CIC International Conference on Communications in China (ICCC), pp. 465-469, 2018.
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[19] S. K. Sharma, S. Chatzinotas, and B. Ottersten “In-line interference mitigation techniques for spectral coexistence of GEO and NGEO satellites,” International Journal of Satellite Communications and Networking, vol. 34, no. 1, pp. 11-39, Jan/Feb. 2016.
[20] P. Gu, R. Li, C. Hua, and R. Tafazolli “Dynamic Cooperative Spectrum Sharing in a Multi-Beam LEO-GEO Co-Existing Satellite System,” IEEE Transactions of Wireless Communications, vol. 21, no. 2, pp. 1170-1182, Feb. 2012.
[21] Study on New Radio (NR) to Support Non-Terrestrial Networks, 3GPP TR 38.811, Rel. 15, Oct. 2019.
[22] G. Robb, “Circularly Polarized Antennas Explained, Without The Math,” Version 5, Antenna Test Lab Co., 2017.
[23] R. Jain, D. Chiu, and W. Hawe, “A quantitative measure of fairness and discrimination for resource allocation in shared systems,” tech. rep., Digital Equipment Corporation, DEC-TR-301, 1984指導教授 許獻聰(Shiann-Tsong Sheu) 審核日期 2023-1-18 推文 plurk
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