近年來由於行動通訊網路的普及，人們對於智慧型行動裝置的上網需求量日益劇增。第三代合作夥伴計畫 (3GPP)於Release-8制訂了3.9G的LTE標準，於Release-10則制定4G的LTE-A標準，以滿足更高的網路需求。

在異質性網路之下，傳統蜂巢式網路架構已經逐漸不敷使用的今天，低功率的小細胞基地台(Small cell)的增設，能夠有效增加特定區域(例：Hot Spot、Cell Edge)的數據傳輸效能。而廣佈的Small cell架構，也將會是未來的趨勢。

由於基地台的廣布，使得細胞間干擾(Inter-cell interference, ICI)的問題日漸嚴重，造成細胞邊緣(Cell Edge)的傳輸效率低落，連帶影響了整體的系統效能。3GPP於Release-8時提出Inter-cell interference coordination(ICIC)，Release-10時提出enhanced ICIC (e-ICIC)， Release-11時提出Coordinated Multi-Point (CoMP)，以用來提供更好的網路通訊傳輸效能。

本論文透過數學化的公式，將上下行的需求分開討論，並合併視為是一個有資源分配限制的系統，進而列出最佳化問題。透過有效率的資源分配，在資源稀少的情況之下，我們優先維持公平性；而在資源豐富的情況之下，則先滿足需求，再最大化吞吐量之成效。

In recent years, due to the popularity of mobile communication networks, people demand for intelligent mobile devices grows rapidly. Third Generation Partnership Project (3GPP) suggests the 3.9G LTE standard in Release-8, and the 4G LTE-A standard in Release-10, to meet the higher demand of networks.

Under the HetNets, today the traditional cellular network architecture has gradually become insufficient. Additional low-power small-cell base stations can effectively increase the specific area (example: Hot Spot, Cell Edge) data transfer performance. Also, the widespread of small cell architecture will be the future trend.

Since the base stations are deployed widely, intercellular interference (Inter-cell interference, ICI) problems become more serious, resulting in low cell-edge transmission efficiency, and also affecting the overall system performance. 3GPP suggests Inter-cell interference coordination (ICIC) in Release-8, enhanced ICIC (e-ICIC) in Release-10, and Coordinated Multi-Point (CoMP) in Release-11, to provide better performance.

In this paper, we consider the requirements of uplink and downlink respectively, combine them into a resource allocation constraints system and formulate an optimization problem for uplink channel and downlink channel, respectively. In the case of scarce resources, we focus on fairness through the efficient allocation of resources; and in the case of resource-rich, we not only try to meet the bandwidth requirements, but also maximize the throughput.

學位論文審定書 i
論文公開授權書 ii
摘要 iii
Abstract iv
目錄 v
圖目錄 vii
表目錄 x
第一章 導論 1
1.1 前言 1
1.2 研究動機 3
1.3 論文架構 5
第二章 相關背景與研究 6
2.1 LTE架構 6
2.2 LTE傳輸存取與調變技術 10
2.3 異質性網路 (HetNet) 16
2.4 細胞間干擾 (ICI) 17
2.5 換手機制 (Handover) 19
2.6 協調式多點傳輸與接收技術 (CoMP) 22
2.7 Quality of Service (QoS) 25
2.8 幾種排程法的介紹 27
第三章 研究方法 30
3.1 情境假設 30
3.1.1. CoMP三種機制的選擇 30
3.1.2. 上下行傳輸的分開討論 32
3.1.3. 情境架構圖 33
3.2 問題描述 35
3.3 RB資源預先保留機制 37
3.4 排程機制 39
第四章 模擬實驗與結果分析 50
4.1 模擬工具 50
4.2 環境說明 51
4.3 結果分析 54
第五章 結論 85
參考文獻 86

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