在LTE-Advanced架構下利用載波聚合技術與服務品質為基礎的排程演算法

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研究生：	林牧鼎 Mu-ting Lin
論文名稱：	在LTE-Advanced架構下利用載波聚合技術與服務品質為基礎的排程演算法 A QoS-based Resource Scheduling for LTE-Advanced System with Carrier Aggregation
指導教授：	吳中實 Jung-Shyr Wu
口試委員:
學位類別：	碩士 Master
系所名稱：	資訊電機學院 - 通訊工程學系 Department of Communication Engineering
畢業學年度：	99
語文別：	中文
論文頁數：	60
中文關鍵詞：	長期演進技術、載波聚合、服務品質保證
外文關鍵詞：	LTE, quality of service, carrier aggregation
相關次數：	點閱：13 下載：0
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在現今無線通訊網路系統，有許多針對頻寬資源分配的研究與討論，由於近年來無線網路系統的快速發展，對於無線資源的需求也隨之與日俱增，但由於現今對於無線頻寬資源的缺乏，LTE-Advanced系統下的載波聚合技術用以解決4G 系統提供大帶寬、更高峰值速率的需求。
本篇論文提出在LTE-Advanced 系統架構下使用載波聚合技術的資源分配演算法，針對CA 技術環境下會衍生的問題，提出在保障使用者基本需求為基礎，針對不同訊務類型的使用者，在滿足其服務品質(Quality of Services, QoS)的前提，追求系統的更大效能為目標的排程法則。並透過模擬的結果，來驗證並分析演算法的效能與公
平性等評估指標。

With respect to current wireless communication systems,
there are many researches involving the discussion of radio
resource allocation. As the wireless network grows rapidly,
there is also a large increase in wireless requirement. Because of the lake of the radio resource, LTE-Advanced proposed carrier aggregation Technology to support widely band and high peak data rate.
To achieve high system throughput and still satisfying the
basic requirements for users’ Quality of Service (Qos) datarate, the dissertation proposed a QoS-based Resource
Scheduling for LTE-Advanced System with Carrier Aggregation. The simulation result used to prove the improving of the system.

目錄
摘要......................................................I
Abstract.................................................II
誌謝....................................................III
目錄.....................................................IV
圖目錄...................................................VI
表目錄.................................................VIII
第一章	序論..............................................1
1.1  前言............................................1
1.2  研究動機........................................2
1.3  論文架構........................................3
第二章  相關背景及研究....................................5
2.1  LTE/LTE-Advanced系統介紹........................5
2.2  LTE系統傳輸資源架構.............................6
2.3  正交分頻多工存取................................7
2.4  無線電資源管理..................................9
2.5  排程機制.......................................10
2.6  使用者服務品質.................................14
第三章  系統架構.........................................17
3.1  載波聚合技術...................................17
3.2  通道狀況.......................................19
第四章 資源配置方式......................................26
4.1  排程法則.......................................26
第五章  模擬及數據討論...................................32
5.1  訊務類型.......................................32
5.2  模擬環境參數...................................32
5.3  模擬結果與數據分析.............................34
第六章 結論..............................................44
參考文獻.................................................45
圖目錄
圖2.2.1  一般循環前置碼長度下的time-frequency資源架構....7
圖2.3.1  OFDMA的子載波分配.................................9
圖2.5.1  貪婪式演算法之用戶選擇..........................13
圖3.1.1  載波聚合........................................17
圖3.1.2  LTE系統下獨立載波排程...........................18
圖3.1.3  LTE-Advanced系統CA技術多載波排程...............19
圖3.2.1  COST-231 Hata Model..............................21
圖3.2.2  多路徑衰減......................................22
圖3.2.3  不同使用者的通道響應............................25
圖4.1.1  Proposed algorithm流程圖........................28
圖5.3.1  訊務類型以隨機作分配的average throughput結果....35
圖5.3.2  Video Stream使用者占1/2的模擬結果...............36
圖5.3.3  Video Stream使用者占2/3的模擬結果...............36
圖5.3.4  Http使用者占1/2的模擬結果.......................37
圖5.3.5  voIP使用者占1/2的模擬結果.......................37
圖5.3.6  訊務類型以隨機作分配的fairness模擬結果..........39
圖5.3.7  Video Stream使用者占1/2的fairness模擬結果.......39
圖5.3.8  Video Stream使用者占2/3的fairness模擬結果......40
圖5.3.9  Http使用者占1/2的fairness模擬結果...............40
圖5.3.10  voIP使用者佔1/2的fairness模擬結果..............41
圖5.3.11  不同訊務類型throughput所占比例................42
表目錄
表2.1.1  LTE/LTE-Advanced系統需求........................5
表5.1.1  系統訊務類型 QoS data rate.......................32
表5.2.1  模擬環境參數....................................33

                                

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[9] Huda Adibah Mohd Ramli, Riyaj Basukala,Kumbesan Sandrasegaran, Rachod Patachaianand, “ Performance of Well Known Packet Scheduling Algorithms in the Downlink 3GPP LTE System”,Malaysia International Conference on Communications (MICC), IEEE , Dec. 2009.
[10] Shi Songsong, Feng Chunyan, Guo Caili, “A Resource Scheduling Algorithm Based on User Grouping for LTE-Advanced System with Carrier Aggregation”, International Symposium on Computer Network and Multimedia Technology(CNMT),IEEE, Jan. 2009.
[11] Michal Bok, “Hata and COST231-Hata Models” MATLAB CENTRAL, OCT. 2008. 取自：http://www.mathworks.com/matlabcentral/fileexchange/21795-hata-and-cost231-hata-models
[12] Ian C. Wong, Zukang Shen, Brian L. Evans, and Jeffrey G. Andrews, “A low complexity algorithm for proportional resource allocation in OFDMA systems” In Proc. IEEE SIPS 2004. Austin, Texas, Oct. 2004.
[13] Teo Choon Heng Alen, A. S. Madhukumar, Francois Chin, “Capacity Enhancement of a Multi-User OFDM System Using Dynamic Frequency Allocation” Broadcasting, IEEE Journal, Dec. 2003.

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