博碩士論文 etd-0611114-212043 詳細資訊


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姓名 簡彰佑(Chang-Yu Chien) 電子郵件信箱 E-mail 資料不公開
畢業系所 通訊工程研究所(Communications Engineering)
畢業學位 碩士(Master) 畢業時期 102學年第2學期
論文名稱(中) 在多重群播的蜂巢式網路中使用可適性調變編碼技術的產出率改進
論文名稱(英) Throughput Improvement using Adaptive MCS for Multiple Multicasting in Cellular Networks
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    紙本論文:1 年後公開 (2015-07-11 公開)

    電子論文:使用者自訂權限:校內 1 年後、校外 2 年後公開

    論文語文/頁數 中文/64
    統計 本論文已被瀏覽 5094 次,被下載 79 次
    摘要(中) 在多點跳躍網路中,加入中繼站(Relay Station, RS)可提升通道品質,而在進行影音串流的群播時,考慮到資料傳輸的正確性,BS會選用整個網路中通道品質最差者所對應的調變技術進行傳送,因此就犧牲了使用較好的調變技術的機會,系統throughput也無法提升;大部分的相關研究是討論如何根據通道品質,決定一個適合的調變技術進行資料傳送,但是忽略了不同使用者會有不同的通道品質。為了解決此問題,本論文在多媒體群播網路中比較三種適應性的調變技術(AMC, Adaptive Modulation and Coding):(1) WMPT (Worst Modulation per Tree)、(2) WMPH (Worst Modulation per Hop)與(3) ISMM (In Sequence Multiple Multicasting)。WMPT是挑出整個網路中最差的調變來群播,WMPH是挑出網路中每個hop中最差的調變來群播,ISMM是本論文所提出的機制,它會根據所有傳輸路徑的通道品質,找出這些通道最好的調變來進行多重群播(Multiple Multicasting),同時也研究同一hop中,使用不同調變技術時對MSs的同步接收產生的影響。最後我們透過MATLAB的模擬,比較這三種使用不同調變技術的群播模型的效能,由結果中可以得知,我們提出的ISMM所付出的end-to-end delay會高於WMPT與WMPH,但是ISMM能夠顧及到不同的通道品質,所以可以有效提升整體系統的throughput,同時我們也在中繼站中對影音串流資料進行額外的delay,來減小各個MS間接收影音串流資料的時間差異。
    摘要(英) Adding a relay station (RS) to form a multi-hop network can reduce the transmission distance which naturally improves channel quality. In video streaming on a multicast tree, BS conventionally chooses a modulation and coding scheme (MCS) to cope with a link with the worst channel quality. Although this conservative approach can guarantee the accuracy of data transfer, it adversely sacrifices the system throughput because it loses the opportunity for choosing a better MCS. Most of the previous researches focused on how to determine a suitable MCS according to channel quality, but they ignored that different users may have different requirements for video quality. To remedy this problem, in this thesis, we first propose three types of adaptive MCS for a multicast network with a tree structure: (1) WMPT (Worst Modulation per Tree), (2) WMPH (Worst Modulation per Hop), and (3) ISMM (In-Sequence Multiple Multicasting). WMPT chooses the worst modulation among all links in a tree to do multicasting. WMPH chooses the worst modulation among all links in each hop to do multicasting. ISMM uses multiple multicast trees in a sequence according to the channel quality of the transmission path. MATLAB simulation is performed to compare the performance of the three different types of adaptive MCS. Simulation results show that although ISMM may exhibit higher end-to-end delay than WMPT and WMPH, it can significantly increase the throughput of overall system. Finally, in ISMM, we come up with mathematical equations to compute the extra delay required at every relay station.
    關鍵字(中)
  • 多點跳躍
  • 中繼站
  • 調變技術
  • 多重群播
  • 通道品質
  • 關鍵字(英)
  • channel quality
  • multiple multicasting
  • multi-hop
  • MCS
  • relay station
  • 論文目次 致謝 i
    摘要 ii
    Abstract iii
    目錄 iv
    圖表目錄 vi
    第一章 緒論 1
    1.1 研究動機 1
    1.2 研究方法 1
    1.3 章節介紹 2
    第二章 可適性調變編碼技術與群播 3
    2.1 可適性調變編碼技術 3
    2.2 在MMR網路的群播技術 4
    2.2.1 MMR網路 4
    2.2.2 單一群播 6
    2.2.3 多重群播 6
    2.3 相關研究 8
    2.4 本論文機制 11
    第三章 可適性調變編碼的多重群播 12
    3.1 系統架構 12
    3.2 MMR群播網路模型 13
    3.2.1 WMPT與WMPH 14
    3.2.2 ISMM 16
    3.3 ISMM接收Video的同步模型 24
    3.3.1 MCS level與end-to-end delay 24
    3.3.2 在RS中額外delay的計算 26
    第四章 分析與結果討論 29
    4.1 環境架構與參數設定 29
    4.2 數值結果與分析討論 30
    4.2.1 平均throughput 31
    4.2.2 平均end-to-end delay 34
    4.2.3 平均extra delay 37
    第五章 結論與未來工作 42
    5.1 結論 42
    5.2 未來工作 44
    Reference 45
    Acronyms 51
    INDEX 52
    參考文獻 [1] IEEE 802.16 Working Group,“IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for fixed and Mobile Broadband Wireless Access Systems Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1”IEEE Std. 802.16e, 2005.
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    口試委員
  • 李宗南 - 召集委員
  • 周孜燦 - 委員
  • 許蒼嶺 - 指導教授
  • 口試日期 2014-06-30 繳交日期 2014-07-11

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