臺灣博碩士論文加值系統

第四代行動通訊系統將在高速移動環境中提供高達100Mbps的服務速率，在低移動速率或是固定區域環境中提供高達1GBbps的服務速率。第四代行動通訊系統由於對傳輸率、頻譜使用效率及系統涵蓋率的高度要求，在系統設計上會與傳統行動通訊系統有所不同，其中包括大量佈設家用基地台(Femtocell)以改善室內無線傳輸訊號嚴重衰減的問題，家用基地台可以被視為低功率、低成本和簡單設定的家用極小型基地台，利用寬頻有線網路提供小範圍的高速無線網路傳輸服務。如何在現有的大基地台行動通訊系統網路環境下佈設家用基地台以達到最高的訊號品質與系統容量，在大基地台與家用基地台間、家用基地台與家用基地台間如何做最有效的頻譜共享、干擾管理以及無線資源分配的皆是非常重要的關鍵技術。
本論文探討在下世代行動通訊系統網路環境中家用基地台與家用基地台之間的無線資源分配；提出三種不同的系統頻譜資源分配方法，經由不同的家用基地台佈建密度與子載波可用數，觀察使用者在不同的無線資源分配方法下的分配效能，系統傳輸量的差異程度。

The fourth-generation (4G) mobile communications system is envisioned to provide up to 100Mbps data-rate services for high mobility users and up to 1Gbps for low-mobility users, anytime and anywhere. Due to the very demanding requirements on transmission rate, spectrum efficiency and coverage, the system design of the 4G system is very different from the traditional mobile communication systems, including the deployment of a large number of home base stations (Femtocells) for the indoor coverage. A femtocell can be regarded as a very simple, low-power, low-cost home base station which uses the high-speed wired network in the backbone to provide high-speed wireless internet services in the indoor environment. The key challenges in the design of femtocell system include: (i) how to deploy femtocells in the existing mobile communication systems so that the highest signal quality and system capacity can be achieved? (ii) how to make the most effective spectrum sharing between the macrocells and the femtocells, and (iii) how to carry out the interference management and allocation of radio resources in an effective way. This thesis investigates the issue of resource allocation between femtocells. Three new resource allocation methods are proposed, including the method based on maximum received SINR, the method with no drop and the method based on femtocell measurements. The performance of the proposed methods are analyzed and compared with extensive simulations. The results show that the proposed methods provide a good trade-off between performance and complexity.

目錄
摘要 I
Abstract II
目錄 IV
圖目錄 VII
表目錄 IX
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 2
1.3 論文章節介紹 3
第二章 背景介紹 5
2.1 下世代行動通訊系統簡介 5
2.1.1 下世代行動通訊系統背景 5
2.1.2 4G標準組織現況 7
2.2 家用基地台技術與系統架構 8
2.2.1 家用基地台之定義 9
2.2.2 家用基地台的優點 9
2.2.3 家用基地台探討議題 12
2.3 同頻干擾 15
第三章 頻譜資源的分配方法 18
3.2 最大SINR分配法 20
3.3 無斷話分配法 21
3.3.1 固定鄰居干擾清單 22
3.3.2 現行鄰居干擾清單 22
3.4 基地台量測分配法 25
3.4.1 固定鄰居干擾清單 25
3.4.2 現行鄰居干擾清單 26
第四章 模擬環境之設定 28
4.1 環境架構 28
4.2 鏈路預算(Link Budget) 30
4.3 家用基地台的佈建 38
4.4 路徑衰減模型 42
4.5 數據分析方法 51
4.5.1 SINR的計算 52
4.5.2 Throughput的計算 56
4.5.3 Outage Rate的計算 56
4.5.4 Drop Rate的計算 57
第五章 模擬結果與數據分析 59
5.1 最大SINR分配法之模擬結果 60
5.2 無斷話分配法之模擬結果 64
5.3 基地台量測分配法之模擬結果 68
5.4 綜合分析 72
第六章 結論與未來展望 77
第七章 參考文獻 78
 
圖目錄
圖1.1 家用基地台架構 2
圖2.1 IMT-Advanced 標準發展時程 7
圖2.2 家用基地台網路系統架構 9
圖2.3 提升傳輸覆蓋範圍 11
圖2.4 減輕大細胞基地台負載 12
圖2.5 家用基地台干擾源示意圖 13
圖2.6 大細胞基地台對家用基地台使用者干擾 16
圖2.7 家用基地台之間的同頻干擾 17
圖3.1 家用基地台後端架構 19
圖3.2最大SINR分配法運作流程圖 21
圖3.3無斷話分配法固定鄰居干擾清單 22
圖3.4現行鄰居干擾清單 23
圖3.5無斷話分配法運作流程圖 24
圖3.6固定鄰居干擾清單 26
圖3.7基地台量測分配法運作流程圖 27
圖4.1 大系統環境架構圖 29
圖4.2 曼哈頓街區 30
圖4.3 一個房子區域 39
圖4.4 室內或室外使用者放置位置 40
圖4.5 家用基地台佈建密度為0.1 41
圖4.6 家用基地台佈建密度為0.5 41
圖4.7 家用基地台佈建密度為1 42
圖4.8 牆壁數量估算範例 43
圖4.9 牆數估算情景一 45
圖4.10 牆數估算情景二 46
圖4.11 牆數估算情景三 47
圖4.12 牆數估算情景四 48
圖4.13 牆數估算情景五 49
圖4.14 牆數估算情景六 50
 
表目錄
表4.1 鏈路預算 31
表4.2鄰居路徑牆壁數量 51
表5.1 Maximum Spectral Efficiency of different MCS''s 60
表5.2 最大SINR分配法使用三種不同佈建密度的Outage Rate.(rreq=3dB) 61
表5.3最大SINR分配法使用三種不同佈建密度的Outage Rate. (rreq=8.5dB) 61
表5.4最大SINR分配法使用三種不同佈建密度的Outage Rate. (rreq=13dB) 61
表5.5最大SINR分配法使用三種不同佈建密度的Drop Rate. (rreq=3dB) 62
表5.6最大SINR分配法使用三種不同佈建密度的Drop Rate. (rreq=8.5dB) 62
表5.7最大SINR分配法使用三種不同佈建密度的Drop Rate. (rreq=13dB) 63
表5.8最大SINR分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=3dB) 63
表5.9最大SINR分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=8.5dB) 64
表5.10最大SINR分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=13dB) 64
表5.11無斷話分配法使用三種不同佈建密度的Outage Rate. (rreq=3dB) 65
表5.12無斷話分配法使用三種不同佈建密度的Outage Rate. (rreq=8.5dB) 65
表5.13無斷話分配法使用三種不同佈建密度的Outage Rate. (rreq=13dB) 65
表5.14無斷話分配法使用三種不同佈建密度的Drop Rate. (rreq=3dB) 66
表5.15無斷話分配法使用三種不同佈建密度的Drop Rate. (rreq=8.5dB) 66
表5.16無斷話分配法使用三種不同佈建密度的Drop Rate. (rreq=13dB) 67
表5.17無斷話分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=3dB) 67
表5.18無斷話分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=8.5dB) 67
表5.19無斷話分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=13dB) 68
表5.20基地台量測分配法使用三種不同佈建密度的Outage Rate. (rreq=3dB) 68
表5.21基地台量測分配法使用三種不同佈建密度的Outage Rate. (rreq=8.5dB) 69
表5.22基地台量測分配法使用三種不同佈建密度的Outage Rate. (rreq=13dB) 69
表5.23基地台量測分配法使用三種不同佈建密度的Drop Rate. (rreq=3dB) 70
表5.24基地台量測分配法使用三種不同佈建密度的Drop Rate. (rreq=8.5dB) 70
表5.25基地台量測分配法使用三種不同佈建密度的Drop Rate. (rreq=8.5dB) 70
表5.26基地台量測分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=3dB) 71
表5.27基地台量測分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=8.5dB) 71
表5.28基地台量測分配法使用三種不同佈建密度的平均系統吞吐量. (rreq=13dB) 72
表5.29 三種方法的Outage Rate和Drop Rate綜合比較. (rreq=3dB) 74
表5.30 三種方法的平均系統吞吐量比較. (rreq=3dB) 74
表5.31三種方法的Outage Rate和Drop Rate綜合比較. (rreq=8.5dB) 75
表5.32三種方法的平均系統吞吐量比較.( rreq=8.5dB) 75
表5.33三種方法的Outage Rate和Drop Rate綜合比較. (rreq=13dB) 76
表5.34三種方法的平均系統吞吐量比較. (rreq=13dB) 76

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