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研究生:盧志宇
研究生(外文):Chih-Yu Lu
論文名稱:封閉式極微小基地台在不同頻譜配置機制下對混合型細胞網路效能的影響
論文名稱(外文):Impact of CSG Femtocells to the Performance of a Two-tier Cell System under Different Spectrum Allocation Mechanisms
指導教授:侯廷昭
指導教授(外文):Ting-Chao Hou
口試委員:侯廷昭吳承崧潘仁義沈文和
口試委員(外文):Ting-Chao HouCheng-Shong WuJen-Yi PanWern-Ho Sheen
口試日期:2011-07-25
學位類別:碩士
校院名稱:國立中正大學
系所名稱:通訊工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2011
畢業學年度:99
語文別:中文
論文頁數:90
中文關鍵詞:開放式封閉式極微小基地台頻譜資源分配
外文關鍵詞:Open subscriber groupClosed subscriber groupFemtocellFFR
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為了能夠彌補大細胞基地台的不足,提升室內使用者的傳輸率以及涵蓋範圍,極微小基地台就被提出來解決這樣的困境。因此加入極微小基地台對於既有系統的影響是一個漸漸受到關注的議題,從現有的研究結果可以發現,在系統中加入越多的開放式極微小基地台可以提升大基地台使用者以及極微小基地台使用者的效能。然而,封閉式極微小基地台對於系統的影響與開放式極微小基地台截然不同,在系統中加入封閉式極微小基地台勢必會造成系統效能的下降。
本論文將探討在混合型的細胞網路環境中,在使用不同頻譜配置機制下,在系統內加入開放式極微小基地台以及封閉式極微小基地台,觀察極微小基地台彼此之間以及對大基地台的影響,進而分析整體的系統效能。另外,有鑑於封閉式極微小基地台對系統有關鍵性的影響,因此在這另外針對封閉式極微小基地台提出EFFR機制,以期能降低封閉式極微小基地台對系統效能的衝擊。

Femtocell base stations are proposed to enhance indoor wireless communication performance and to extend coverage since the signal of macro base station is degraded severely after penetration from outdoor to indoor. As a result, researchers are interested in how femtocell base stations may influence macro base stations or other femtocell base stations. According to various research papers, to deploy more open femtocell base station in the macrocell coverage area can enhance performance of both macro users and femto users. However, compared with open femtocell base stations, closed femtocell base stations may degrade system perforemance dramatically due to their different usage characteristics from those of open femto base stations.
In the thesis, we provide simulation results to show how open femtocell base stations and closed femtocell base stations impact system performance with different spectrum allocation mechanisms. The interferences among open femtocell base stations, closed femtocell base stations, and macro base station are investigated. Furthermore, since closed femtocell base stations are critical interference sources, we propose a novel spectrum allocation mechanism, called EFFR, to mitigate interferences from closed base stations.

目錄
摘要 i
Abstract ii
目錄 iii
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 1
1.3 論文章節介紹 4
第二章 背景介紹 5
2.1 下世代行動通訊環境簡介 5
2.1.1 OFDM與OFDMA技術 5
2.1.2 無線通訊訊號強度之衰減 6
2.2 簡介極微小基地台 12
2.2.1 開放式極微小基地台 12
2.2.2 封閉式極微小基地台 13
2.2.3 混合式極微小基地台 14
第三章 頻譜配置機制 15
3.1 頻譜配置 (1, 3, 1) 16
3.2 頻譜配置 (1, 3, 3) 18
3.3 部分頻率重複使用 20
3.4 延伸式部分頻率重複使用 22
第四章 模擬環境之設定 29
4.1 環境架構 29
4.2 環境參數設定 32
4.3 極微小基地台的佈建 33
4.4 使用者的加入 34
4.5 極微小基地台選擇子通道的方法 35
4.6 路徑衰減模型 35
4.7 數據分析方法 39
4.7.1 SINR的計算 40
4.7.2 Throughput的計算 42
第五章 模擬結果與數據分析 46
5.1 單層大細胞網路 46
5.1.1 SINR分布 46
5.1.2 系統吞吐量 50
5.2 混合型細胞網路 51
5.2.1 頻譜配置 (1,3,1) 混合型細胞網路 51
5.2.2 頻譜配置 (1,3,3) 混合型細胞網路 63
5.2.3 頻譜配置FFR混合型細胞網路 73
5.2.4 綜合效能評比 84
第六章 結論與未來展望 86


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