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研究生:于思耘
研究生(外文):Si-Yun Yu
論文名稱:LTE-A小型基地台網路之聯合無線資源管理貪婪演算法
論文名稱(外文):A Greedy Algorithm for Joint Radio Resource Management in LTE-A Small Cell Networks
指導教授:蔡智強蔡智強引用關係
指導教授(外文):Ji-chiang Tsai
口試委員:袁世一張哲誠
口試委員(外文):Shih-Yi YuanChe-Cheng Chang
口試日期:2015-07-28
學位類別:碩士
校院名稱:國立中興大學
系所名稱:電機工程學系所
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:2015
畢業學年度:103
語文別:中文
論文頁數:51
中文關鍵詞:長期演化技術進階版小型基地台比例公平排程機制貪婪演算法
外文關鍵詞:LTE-ASmall CellProportional FairGreedy Algorithm
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由於無線網路技術的發達,近年來使用4G手機的使用者逐漸提升,而4G標準則是根據國際電信聯盟(ITU) 的IMT-Advanced所定義,其具有高頻寬、高傳輸速度以及高品質行動服務等特性,並相容於現有的固定式網路,因此如何在4G無線網路上公平地分配使用者的資源來最佳化系統效能便成為了一個重要的課題。
本篇論文為探討4G之長期演化技術進階版(LTE-A)的下行鏈路在小型基地台(Small Cell)的系統下,如何公平地管理有限的無線資源,使得系統的整體吞吐量最大化。明確的說明,我們將複雜的系統資源分配模型以數學公式表示,並參考比例公平排程機制,計算每個分配產生的效用(Utility),並考量各小型基地台內使用者的分佈情況,以貪婪演算法求出資源分配的最佳解,以達到系統吞吐量的最大化。最後,我們也進行模擬實驗來探討我們所提出的方法與先前的方法相比,是否能夠有效的提升系統吞吐量。


With the development of wireless network technology, 4G mobile phone users have increased gradually in recent years. Particularly, the standards of 4G have been defined by IMT-Advanced from International Union, which enjoy high frequency bands, high transmission rates, high quality services as well as being compatible with fixed networks. Therefore, how to fairly allocate radio resources to users while maintaining the maximum throughput of the whole system is an important issue.
In this thesis, we investigate how to management radio resources fairly in the downlink transmission of the LTE-A small-cell network to maximize the system throughput. More explicitly, we formulate the above scenario as an optimization problem and then maximize the total user utility for each allocation based on the concept of Proportional Fairness. Moreover, we find the near-optimal solution by a greedy algorithm. Finally, we compare our method with two previous algorithms to verify the performance of our method, by carrying out several simulation experiments with different distributions of users in the service area of each small cell.


誌謝 1
摘要 2
Abstract 3
目次 4
圖目次 6
表目次 7
第一章 緒論 8
1.1 簡介 8
1.2 研究動機與目的 8
1.3 論文架構 9
第二章 背景介紹 10
2.1 LTE與LTE-A系統介紹 10
2.1.1 LTE基本系統架構 10
2.1.2 E-UTRAN 11
2.1.3 EPC 12
2.2 LTE 傳輸架構 13
2.2.1 LTE Frame Architecture 13
2.2.2 Resource Block 15
2.3 LTE MAC Layer 16
2.3.1 Channel Quality Indicator 16
2.4 LTE Band 17
2.5 LTE-A Carrier Aggregation 17
2.6 LTE Pathloss Model 19
2.7 LTE Penetration Loss 19
2.8 MultiPath 20
2.9 Proportional Fair 21
2.10 Greedy Algorithm 22
第三章 Small Cell 24
3.1 小型基地台的種類 25
第四章LTE-A SmallCell網路下行鏈路傳輸模型 26
4.1 基本系統排程 27
4.2 使用者通道狀況 28
4.2 系統吞吐量最佳化 28
4.3 排程限制 29
4.4 MIMO 與LTE系統 31
第五章 以聯合貪婪演算法求最佳解 32
第六章 模擬方法 35
6.1 模擬環境 35
6.1 模擬步驟 36
6.3 模擬結果 43
第七章 結論與未來展望 48
參考文獻 49


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