研究生: |
詹益昇 I-Sheng Chan |
---|---|
論文名稱: |
IEEE 802.16e系統中非即時訊務之動態電能管理機制設計 A Dynamic Energy Management Mechanism for Non-Real-Time Traffic in the IEEE 802.16e Systems |
指導教授: |
陳金蓮
Jean-Lien C. Wu |
口試委員: |
陳彥文
none 馮輝文 none 鄭瑞光 none |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 57 |
中文關鍵詞: | 休眠模式 、非即時訊務 |
外文關鍵詞: | TCP, Non-Real Time Traffic |
相關次數: | 點閱:151 下載:1 |
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在支援終端用戶行動能力的IEEE 802.16e無線都會網路中,電池能量是行動節點(Mobile Station, MS)的重要資源,如何設計MS節能機制使其能有效延長連續工作時間是非常重要的議題。因此在IEEE 802.16e網路重負載(Heavy Load)的環境中針對非即時(Non-Real Time)訊務設計出有效率的節能機制,是本論文的研究主題。
在本篇論文中,我們設計動態能量管理(Dynamic Energy Management, DEM)機制,本動態能量管理機制除了可以讓基地台(Base Station, BS)或MS較容易掌握提出休眠之時機外,亦可降低MS頻繁的狀態切換進而達到節能的效果。我們利用封包聚集的概念設計排程方法,考慮網路傳輸控制協定(Transmission Control Protocol, TCP)的傳輸特性並改善IEEE 802.16e標準規範中針對非即時訊務所定義休眠類別一(Class 1機制)之休眠方式。接著我們利用MS估測伺服器壅塞視窗大小(Congestion Window Size)以及BS所計算出排程時間相關參數,由BS給予MS適當的休眠參數。本論文以檔案傳輸協定(File Transfer Protocol, FTP)應用為例,並且只要是TCP傳輸方式之應用皆可套用我們提出之DEM機制。由模擬結果可以看到,吾人提出之DEM機制與Class 1機制比較後,針對不同的非即時訊務量,除了可以減少平均耗電量約16%~25%,同時也可減少狀態切換率63%~77%。
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