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研究生: 陳立偉
Chen, Li-wei
論文名稱: 在WiMAX平台下研究全民SNG應用之多重設定上傳服務
Upstreaming with Multiple Profiles in Personal SNG over WiMAX
指導教授: 鄭憲宗
Cheng, Sheng-Tzong
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 資訊工程學系
Department of Computer Science and Information Engineering
論文出版年: 2008
畢業學年度: 96
語文別: 中文
論文頁數: 47
中文關鍵詞: 服務品質NS-2UEPARQFECWiMAX
外文關鍵詞: QoS, UEP, NS-2, ARQ, WiMAX, FEC
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  • 近年來許多的網路視訊平台興起,如YouTube之類的網站,提供許多人將錄製的檔案放置在網路上讓其他的使用者觀看,但是這種架構無法提供使用者最即時的資訊與影片。在高速無線網路 IEEE 802.16成為熱門話題與應用的當下,透過這個傳輸環境提供立即性的視訊串流服務,讓使用者不需要等待影片上傳的時間。我們所設計的系統:全民衛星新聞採集在Personal SNG over Push-to-Watch System Architecture,讓使用者不僅可以馬上將錄製的影片提供給同樣使用這系統的其他使用者,而此平台的設計,也可以延伸到許多服務應用。
    本文之目的為實行全民衛星新聞採集在Personal SNG over Push-to-Watch System Architecture技術中的串流上傳(Upstream)功能。即按即看(Push-to-Watch)系統主要提供即時串流播送分享,播報員(Reporter)透過個人行動裝置與無線網路技術,可將即時影像以串流傳輸與人分享。考量到播報員所使用的個人行動裝置性能不一,本文提出多重設定(Multiple Profiles)的串流上傳功能。隨著硬體性能跟網路傳輸狀況的不同,提供了可調適性的向前糾錯碼、自動重傳、非均等保護等功能供選用,以確保串流上傳的服務品質(Quality of Service)。最後,使用NS-2進行模擬實驗,驗證使用各種設定時的串流上傳的訊號品質。

    In recent years there are many Internet video platforms, such as YouTube, allowed users to share their videos with others on the Internet, but they were unable to provide users with the most real-time information and videos. The IEEE 802.16 standard has become a hot topic. It provides the environment to transmit real-time video streaming, so users do not need to wait for the uploading time. The Personal SNG over Push-to-Watch System Architecture we proposed allowed users to share the videos they recorded with other users in the same system immediately. The platform is also able to provide many services.
    The purpose of this paper is implementing the upstream function in the Personal SNG over Push-to-Watch System Architecture. Push-to-Watch system mainly provides the service of real-time streaming, so the reporters can upstream their real-time videos through their mobile devices and wireless network technology. The performance of the devices used by the reporters is different, so we propose the multiple profiles upstream function. We provide adaptive forward error correction codes, automatic repeat request, and unequal error protection for selection base on the hardware capability and the network states to ensure the quality of service. Finally, we use NS-2 as simulation tool to verify our algorithm.

    摘要 iii Abstract iv 致謝 v 章節目錄 vi 圖目錄 x 第一章:論文簡介 1 1-1:前言 1 1-2:動機 2 1-3:論文架構 3 第二章:背景知識與相關研究 4 2-1:IEEE 802.16標準制定過程 4 2-2:IEEE 802.16協定模型 6 2-3:IEEE 802.16品質服務機制 8 2-3-1:向前糾錯碼 8 2-3-2:自動請求回覆 10 2-4:影像編碼介紹 11 2-5:相關研究 12 第三章:多重除錯機制 16 3-1:Personal SNG 16 3-1-1:簡介 16 3-1-2:系統架構 18 3-1-3:實際應用 18 3-2:封包傳輸除錯機制 19 3-2-1:可調適性的FEC 20 3-2-2:非對等保護 21 3-2-3:基於GOP的重傳機制 25 3-3:基於裝置性能的多重設定 27 第四章:模擬結果 29 4-1:模擬工具介紹 29 4-2:實驗環境 31 4-3:編碼與錯誤機制更正的分析 34 4-3-1:H.264編碼的影像片段Highway 34 4-3-2:H.264編碼的影像Foreman 38 4-3-3:MPEG-4編碼的影像Highway 41 第五章:結論 44 附錄:參考文獻 45

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