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研究生:孫浩軒
研究生(外文):Hao-ShuanSun
論文名稱:寬頻無線接取網路上針對可適性網路編碼機制之研究與分析
論文名稱(外文):Research and Analysis of Adaptive Network Coding for Broadband Wireless Access Networks
指導教授:林輝堂林輝堂引用關係
指導教授(外文):Hui-Tang Lin
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電腦與通信工程研究所
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:2012
畢業學年度:100
語文別:中文
論文頁數:57
中文關鍵詞:全球互通微波存取IEEE 802.16E網路編碼
外文關鍵詞:WiMAXIEEE 802.16ENetwork Coding
相關次數:
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  • 下載下載:5
  • 收藏至我的研究室書目清單書目收藏:0
寬頻無線存取網路,如LTE與WiMAX,由於不穩定的無線傳輸媒介因而產生封包丟失的問題。雖然現有的混合式自動重送請求(HARQ)的錯誤控制方法能恢復丟失的封包,但其傳輸效率低落所以不適用於需考量即時服務的應用。近年來,網路編碼因可增進網路效能而備受重視,但同時卻也產生額外的編碼負擔。雖然適應式網路編碼機制可減低網路編碼負擔同時增進網路效能,但尚未有一個完整的效能分析架構。因此,本研究針對在寬頻無線存取網路之適應式網路編碼機制進行效能分析,考慮原始封包是否可立即使用之情況來探討網路吞吐量以及網路延遲,以預測此編碼機制之效能。除此之外,本研究更加以分析目前於無線寬頻存取網路中之網路編碼機制的傳送封包長度對效能的影響。最後,本論文透過執行電腦模擬實驗以驗證所提出之數學分析的正確性及準確性,結果顯示數學分析數值與電腦模擬結果極為吻合。
Broadband wireless access (BWA) networks, such as LTE and WiMAX, are inherently lossy due to unreliability of wireless medium. Although the Hybrid Automatic Repeat reQuest (HARQ) error-control method is able to recover from packet loss, it has low transmission efficiency and is unsuitable for delay-sensitive applications. Alternatively, network coding techniques improve networks throughput, but incur significant overhead. Frame-by-frame Adaptive Network Coding (FASNC) has been proposed to achieve low network coding overhead while providing considerable improved network performance, but its analytical model has not been fully developed. This paper develops an analytical model for evaluating the mean decoding delay and mean goodput of FASNC under different decoding capabilities. This study further analyzes the the effect of packet size in using network coding for BWA networks. The results derived using the developed analytical model agree with those obtained from extensive computer simulations.
摘要 i
Abstract ii
誌謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 1
1.1 無線網路概觀 1
1.2 研究動機 3
1.3 研究目的 4
1.4 論文架構 5
第二章 6
2.1 隨機網路編碼與系統網路編碼 6
2.2 N-in-1 重傳編碼機制 7
2.3 不同的網路編碼參數設定對於RNC的額外開銷分析 10
2.4 在IEEE 802.16網路中最佳的媒介存取控制層封包長度 12
2.5 本章總結 14
第三章 15
3.1 FASNC網路環境 15
3.2 FASNC網路編碼方法 18
3.2.1 M-SNC 18
3.2.2 MGC 20
3.3 本章總結 24
第四章 25
4.1 系統效能分析 25
4.1.1 分析模型 26
4.1.2 解碼延遲分析 27
4.1.3 吞吐量分析 34
4.2 封包長度與係數場域長度選擇 36
4.2.1 網路編碼效率計算模型 36
4.2.2 最佳的封包長度與係數場域長度的選擇 38
4.3 本章總結 41
第五章 43
5.1 解碼延遲與吞吐量分析結果 44
5.2 封包長度與係數場域長度最佳化結果 48
第六章 52
參考文獻 54
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