在LTE-A系統，上行資源分配演算法的研究

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姓名

徐珮滎(Pei-ying Hsu) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

在LTE-A系統，上行資源分配演算法的研究
(The study of uplink resource allocation algorithm in LTE Advanced systems.)

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摘要(中)

為了因應日與俱增的網路服務需求，和提供更快速、涵蓋範圍更廣的無線網路服務，國際電信聯盟(ITU)接續現有的3G無線通訊制定了4G通訊標準IMT-Advanced，為了達到IMT-Advanced的需求，3GPP發展出LTE-Advanced 標準，在LTE-Advanced中引入了四種關鍵技術，而其中的載波聚合技術(carrier aggregation)即為本論文探討資源分配演算法的重點之一。
LTE-A有向下相容，因此仍然使用SC-FDMA作為上行傳輸的技術，SC-FDMA中為了讓傳輸速度較快，分配資源的方式為分配一段連續頻譜給UE，目前已經有許多關於LTE SC-FDMA上行資源分配的演算法，但大部份演算法最主要是考量通道狀況來分配資源，卻少有將頻寬要求和UE間的優先順序等納入考量。
因此在本論文中將會設計一演算法，除了要能符合SC-FDMA中連續分配資源的規範，將頻寬要求和UE間優先順序納入考量外，還要考慮到加入LTE-A的關鍵技術載波聚合後，資源分配的方式及步驟。

摘要(英)

In order to meet the strong demand for wirelessbroadband services ,the International Telecommunication Union(ITU) has initiated the standardization process of the next generation mobile communication systems, entitled IMT-Advanced or fourth-generation(4G) mobile systems . To fulfill and partly exceed the IMT-Advanced requirements, 3GPP release LTE-Advanced. In order to meet these requirements, a variety of techniques are used. Carrier aggregation is one of the main techniques introduced in LTE-Advanced. In this paper, we have developed an algorithm of resource allocation dealing with carrier aggregation in the LTE-Advanced system.
LTE-A system is backward compatible with LTE system, which means SC-FDMA technology is continue used in LTE-Advanced uplink. In order to speedup bit rates in uplink transmission, the system should allocate continuous spectrum to one UE. So far, there has been some research about resource allocation in LTE uplink. However, most people only take channel conditions into consideration in resource allocation when designing these algorithms. In our proposed method, we have designed an algorithm considering not only the channel condition but bandwidth required by UE and priority in different type of QoS. Moreover, our algorithm has a multiple-rounded allocation which suits for UE equipped with multi antennas.

關鍵字(中)

★ LTE
★ LTE-Advanced
★ SC-FDMA
★ 上行
★ 資源分配
★ QoS
★ 載波聚合技術

關鍵字(英)

★ LTE
★ LTE-Advanced
★ SC-FDMA
★ uplink
★ resource allocation
★ QoS
★ Carrier Aggregation

論文目次

摘要 i
ABSTRACT ii
圖目錄 iv
表目錄 vi
第一章緒論 1
1-1研究背景 1
1-2 章節概要 2
第二章相關研究 3
2-1　LTE規格介紹與SC-FDMA介紹 3
2-1-1 LTE系統架構 4
2-1-2 LTE之QoS 5
2-1-3 LTE Frame 架構 6
2-1-4 SC-FDMA介紹 7
2-2　CDS(Channel Dependent Scheduling)及相關演算法 10
2-3　Mathematical Matching與Gale-Shapley 演算法 14
2-3-1　SMP分析 15
2-3-2　Gale-Shapley 演算法 18
2-3-3　Optimal Stable Matching 20
2-4 LTE-Advanced carrier aggregation 21
2-5 相關文獻討論與動機 24
第三章研究方法 26
3-1 系統架構介紹 26
3-2 Matching 機制 30
3-2-1 建立Preference Structures 30
3-2-2 Gale-Shapley演算法 33
3-2-3 Rematching的機制與時機 36
3-3 Assigning 機制 37
3-3-1挑選UE之機制 37
3-3-2降調變機制 39
3-3-3 修改RME演算法 41
第四章模擬結果與分析 44
4-1模擬環境與參數 44
4-2 Traffic Model 45
4-2-1 VoIP 46
4-2-2 Video stream 47
4-2-3 FTP 48
4-3模擬結果與分析 49
第五章結論與未來工作 57
參考文獻 58

參考文獻

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[15]Ein-Ya Gura, Michael Maschler, “Insights Into Game Theory: An Alternative Mathematical Experience, ” Cambridge University Press 2008.
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指導教授

陳彥文(Yen-wen Chen)

審核日期

2012-10-1

推文