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研究生： 陳乃寧
Nai-ning Chen
論文名稱： LTE-Advanced 系統可調適性載波聚合策略
Adaptive Carrier Aggregation Scheme for LTE-Advanced Systems
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： 59
中文關鍵詞： LTE-A 、負載平衡 、載波調度 、封包調度 、載波聚合
外文關鍵詞： Carrier Aggregation, LTE-A, Loading Balance, Packet Scheduling, Carrier Assignment
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    • 載波聚合(Carrier Aggregation)技術成為LTE-Advanced 實現大頻寬的關鍵技術，可以想像的是這項技術也帶來了諸多的挑戰。一開始將初步介紹載波聚合技術，並且根據日本營運商NTT DoCoMo 在3GPP RAN2 會議裡所提出的載波聚合配置情境來探討載波單元分配問題。因為使用者能力與位置不同而所能使用的載波單元也不同，這
    導致了某些載波單元過於擁擠。本文使用兩層演算法，上層JWSQ 載波單元分配演算法用來解決使用者間載波單元重疊問題，下層為PF演算法，而JWSQ 考慮了載波內使用者傳輸狀況也考慮載波單元負載狀況，經由模擬證明，利用這兩層演算法，可增進系統載波單元間的負載平衡，也可提高使用者間的傳輸公平性。

    Carrier Aggregation (CA) is the key technique to realize wide bandwidth in the LTE-Advanced system. There exist lots of challenge to aggregate multiple Carrier Components (CCs). This study starts with a brief introduction of CA and then discusses the CC assignment of the CA scenarios proposed by the Japanese carrier NTT DoCoMo in the third Generation Partnership Project Radio Layer 2 (3GPP RAN2) meeting. A 2-layer algorithms is then proposed. Layer-1 is the proposed CC assignment algorithm, called JWSQ, which considers user transmission situation and carrier loading condition. The JWSQ solves the problem of overlapping of CC among multiple users. Further, Layer-2 is the PF algorithm in the literature. The simulation results proves that the 2-Layer
    algorithms can enhance the carrier load balance and transmission fairness among users.

    中文摘要......................................................I 英文摘要.....................................................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......................................................................................1 1.3 論文架構......................................................................................3 第二章 相關研究背景..............................................................................4 2.1 LTE 介紹.......................................................................................4 2.2 LTE-Advanced 介紹.....................................................................7 2.3 封包調度演算法........................................................................12 2.4 載波單元配置演算法................................................................16 2.5 公平性指標................................................................................17 第三章 系統情境與架構以及JWSQ 演算法.........................................19 3.1 載波聚合情境............................................................................19 3.2 系統拓樸與架構........................................................................21 3.3 最小權重隊列演算法................................................................25 3.4 使用者通道狀況........................................................................28 第四章 模擬參數與數據討論................................................................31 4.1 模擬環境通道模型....................................................................31 4.2 模擬參數....................................................................................33 4.3 模擬數據討論..............................................................................36 第五章 結論與未來研究........................................................................44 參考文獻..................................................................................................45

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