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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/105716


    Title: Layered video multicast with qos-guaranteed and energy-aware scheduling mechanisms in IEEE 802.16 networks
    Other Titles: IEEE 802.16網路中具服務品質保證及電量知覺之分層視頻群播排程機制
    Authors: 王子嘉;Wang, Tzu-Chia
    Contributors: 淡江大學資訊工程學系博士班
    張志勇;Chang, Chih-Yung
    Keywords: 群播與廣播服務;服務品質保證;省電;正交分頻多工存取;可階式影音編碼技術;Multicast and Broadcast Service;QoS Guaranteed;Power saving;Orthogonal Frequency Division Multiple Access;Scalable Video Coding
    Date: 2015
    Issue Date: 2016-01-22 15:03:27 (UTC+8)
    Abstract: 近年來,隨著無線網路通訊技術的快速發展和行動通訊設備的普及,行動即時影音群播服務如IPTV或串流影音等群播服務也愈來愈受到重視。IEEE 802.16網路具有高速率、遠距離傳輸之傳輸特性,如何提供行動使用者兼具省電及品質保證之多媒體群播服務已成為現今最熱門研究主題之一。群播較多次單播可節省大量頻寬,獲得群播效益,但群播效益的產生需要各個MS共同醒來,以相同的速率接收來自BS的影音群播資訊,因此明顯與睡眠效益相衝突,本論文將研發具電量知覺的群播技術,使BS獲得群播效益的同時,仍能讓電量較弱的MS獲得較佳的睡眠效益,並對影音傳輸的QoS有所保證。此外,本研究在WiMAX 802.16j的網路環境中,考量Relay Station的加入,並基於OFDMA模式下,針對使用者所提出的IPTV服務,進行群播排程,以滿足其影片解析度及延遲時間之要求,並達到節省頻寬資源及最大的網路吞吐量之目的。最後,模擬結果顯示,我們所研發的群播技術表現效能優於現有文獻,可有效減少影音資料傳輸的整體時間,妥善使用無線頻寬資源。
    IEEE 802.16 networks characterized by long-haul and high-speed communications have attracted researchers to develop multicast schemes for wireless video services, such as mobile IPTV. Multicasting can save the bandwidth consumption and thus gains the multicast advantages. However, all MSs should cooperate with each other to wake up simultaneously for receiving the multicast data. This might reduce the power saving quality of each MS and violate the delay constraint of some MSs because all MSs in a multicast group should apply a common modulation. Therefore, we proposes the efficient QoS-guaranteed and energy-aware multicasting mechanism to maximize the multicast advantages and guarantee the delay constraint of each MS while the power-saving requirements of MSs are meet. Simulation results reveal that the proposed multicast mechanism outperforms existing works in terms of the user satisfactory and network throughput.
    Appears in Collections:[資訊工程學系暨研究所] 學位論文

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