臺灣博碩士論文加值系統

行動通訊發展到4G，LTE(Long Term Evolution)技術逐漸發展成熟，與3G行動網路系統相比，LTE有更高的容量和數據傳輸速率。但是，使用者設備(UE)的電量有限。因此，如何增加使用者設備(UE)的使用時間是LTE技術發展的重要議題之一。
LTE中非連續接收模式(DRX)可允許使用者在沒有接收資料時進入省電模式。本論文針對非即時應用對延遲時間不敏感的特點。將LTE系統裡的省電機制DRX進行改良，增加省電效率。論文中藉由模擬方法，以各種不同的參數來測試我們的提案和
原先省電機制，並藉由節省電力及延遲時間來評估他們的效能。我們證明了我們的提案可以得到較好的省電效率。

LTE (short for Long Term Evolution) technology has matured gradually to make the wide deployment of 4G infrastructures. Compared with 3G infrastructures, LTE has higher capacity and data transmission rate. Due to the power limitation of User Equipment (UE) , how to prolong LTEUE usage time becomes one of the most important issues in LTE technology development.
In LTE networks, Discontinuous Reception Mode (DRX) allows the UE to enter the power saving mode when data is not received. Because non-real-time applications are insensitive to data communication delay ,this paper proposes a priority scheme for the DRX mechanism in order to improve the power efficiency of an UE in LTE networks. In simulation, we use several parameters to test our proposal and the original power saving mechanism, and evaluate their performances with power saving and delay time as metrics. We show that our proposal has better power saving efficiency.

摘要 i
ABSTRACT ii
誌謝 iii
目錄 iv
表目錄 v
圖目錄 vi
第一章 緒論 1
1.1 前言 1
1.2 LTE產業動態及發展 4
1.3 LTE的版本 6
1.4 研究動機 9
1.5 論文架構 10
第二章 LTE系統相關知識 11
2.1 LTE的架構 11
2.1.1 EPC 12
2.1.2 E-UTRAN 12
2.2 LTE的相關知識與技術 14
2.2.1 SC-FDMA 14
2.2.2 TDD與FDD 14
2.2.3 OFDMA 15
2.2.4 Frame架構與PDCCH 16
2.2.5 LTE承載 18
2.3 DRX省電機制 18
2.3.1 RRC_Connected 20
2.3.2 RRC_Idle 20
2.4相關文獻探討 23
第三章 本篇論文提出的架構 25
第四章 模擬結果與討論 27
4.1 模擬環境與實驗參數 27
4.2 模擬結果與分析 30
第五章 結論 40
參考文獻 41

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