隨著手持裝置的普及與發展，使用者會隨時隨地的使用行動網路，因此通訊網路扮演了重要的角色，第三代合作夥伴計畫 (3GPP) 制定了新的4G行動網路標準LTE-A (Long Term Evolution Advance)。
3GPP在Release 9中制定了Relay的架構標準，用以改善連線不佳的區域，例如Hot Spot, Dead Spot, Cell-edge，Relay Node可採用無線(wireless)的方式與基地台建立回程網路(Backhaul Network)，因此Relay Node在短期的大型活動場合或不便建立有線回程網路的情況下，便是比較好的選擇。
在LTE-A中的CoMP機制，藉由基地台之間的資訊交換，調整傳輸資源，對Cell-edge的使用者共同傳輸，讓原本是干擾的訊號轉為有用的傳輸訊號，主要改善Cell-edge的干擾問題，並且提升傳輸效能，因而被大量的討論與研究。
本篇提出一個新的排程機制，結合3GPP制定的Relay架構與CoMP機制，提升基地台底下無線回程連線的RN (Relay Node) 效能，我們的方法會區別出基地台底下不同的UE (User Equipment)，UE會回傳底下的服務人數與通道狀態訊息，蒐集完使用者資訊後，會計算出新的權重值，UE會分成四類的優先度，由高到低分別為 JT RN, RN, JT UE, UE，除了讓Relay Node擁有較高的優先度分配資源，同時結合CoMP JT (Joint Transmission)機制，獲得更多的資源。
最後我們使用模擬器ns3模擬我們所提出的方法，結果可以看到不論人數多或少的情況，確實可以提升整體使用者的平均吞吐量(Throughput)，保留CoMP機制的效益，並且讓Relay Node擁有較高的吞吐量。

Nowadays, with the rapid growth of handheld devices, people rely on wireless network more than anytime before. Since wireless network are more and more important, 3GPP proposed a new 4G wireless communication standard called “Long Term Evolution Advance” (LTE-A).
In Release 9, 3GPP set a standard of “Relay” architecture to improve locations with bad connection, such as Hot Spot, Dead Spot, and Cell-edge. RN (Relay Node) can connect with DeNB (Donor eNodeB) by wireless Backhaul Link, therefore makes it a better choice for a large outdoor event held in a short duration compared to the wired Backhaul connection.
CoMP (Coordinated multipoint transmission/reception) is a new architecture widely discussed and researched in LTE-A. CoMP can improve Cell-edge connection, and improve bitrate while decreasing interference.
In this paper, we proposed a new scheduling mechanism combined of Relay and CoMP to improve the efficiency of wireless RN. The proposed scheduling can identify different UE (User Equipment) under a eNB (eNodeB). UE will report how many users served and the CSI (Channel State Information) to eNB. After gathering the information, our mechanism calculate a new weight. Then the weight and CSI exchange between eNBs, so RN can get more resources and allow RN combined with CoMP JT (Joint Transmission) mechanism to get higher priority. That is, four different priorities from high to low for JT RN, RN, JT UE, and UE are arranged.
In the end of paper, we use a network simulator ns3 to simulate our method. Experiment results show the scheduling mechanism can improve the average throughput, and let the Relay Node has higher throughput by keeping benefit of CoMP.

論文審定書 i
論文公開授權書 ii
摘要 iii
Abstract iv
目錄 vi
圖目錄 viii
表目錄 x
第一章 導論 1
1.1. 簡介 1
1.2. 研究動機 4
1.3. 論文架構 5
第二章 相關背景與研究 6
2.1. 長期演進技術架構介紹 6
2.2. LTE基本傳輸技術 10
2.2.1. 頻譜的利用 10
2.2.2. 空間多工 10
2.2.3. 調變 11
2.2.4. 正交分頻多重存取技術 (OFDMA) 11
2.2.5. 資源區塊 (Resource Block, RB) 與訊框 (Frame) 13
2.2.6. 通道狀態訊息 (Channel Status Information, CSI) 15
2.3. Relay 19
2.4. 異質性網路 (HetNet) 22
2.5. CoMP 25
2.6. 排程機制 28
第三章 研究方法 31
3.1. 使用者分類方式 33
3.2. 優先權重值計算方式 36
3.3. 排程機制流程 40
第四章 模擬效能與分析 43
4.1. 模擬工具介紹 43
4.2. 模擬環境說明 44
4.3. 模擬結果與分析 48
第五章 結論 58
參考文獻 59

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