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研究生:羅允成
研究生(外文):Yun-Cheng, Luo
論文名稱:適用於次世代網路環境之服務品質感知可擴展隨選視訊服務傳送機制
論文名稱(外文):A Scalable QoS-aware VoD Resource Sharing Scheme for Next Generation Networks
指導教授:黃振榮黃振榮引用關係
指導教授(外文):Chenn-Jung, Huang
學位類別:碩士
校院名稱:國立花蓮教育大學
系所名稱:學習科技研究所
學門:教育學門
學類:教育科技學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:88
中文關鍵詞:隨選視訊次世代通訊網路服務導向為目的之架構點對點網路服務品質確保模糊理論
外文關鍵詞:video-on-demandnext generation networkservice oriented architecture (SOA)peer-to-peer networkquality of service(QoS)fuzzy logic
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隨著網際網路的發展與無線通訊技術的進步,無線通訊網路的高覆蓋率、漫遊功能、支援高速資料傳輸率等眾多先進網路傳輸技術的蓬勃發展,讓使用者對於網路應用的需求從以往在特定時間、特定地點存取網路資源、簡單的實體連接等,日益地朝向多元化、無地域限制的多媒體資料傳輸需求。在次世代網路環境中充裕的網路頻寬資源將產生龐大的隨選視訊服務需求,傳統的隨選視訊服務結構需要作適度修改以滿足次世代異質網路的特性,這促使我們以網路感知的概念去開發通常未被完全利用的節點資源,充分運用點對點硬體資源、網路頻寬分享的優點,建立一個點對點影音資源傳送機制以支援未來次世代網路上所可能產生龐大的隨選視訊服務需求。本研究運用網路感知的概念,提出一個適用於結合有線與無線網路的次世代網路環境中,傳輸多媒體視訊隨選系統的解決方案,以降低使用者存取影音服務時的阻斷機率、服務中斷機率以及使用者等待服務的時間,本研究使用模糊邏輯推論引擎系統與節點穩定度預測模組可提供模糊邏輯推論系統所需之參數,作為判斷該節點所在的網路狀況,決定是否讓該節點作為服務其他人的服務暫存點。再透過服務導向(Service oriented architecture, SOA)點對點的影音資料分享架構、會談起始通訊協定控制機制(Session Initiation Protocol, SIP)與IP多媒體子系統標準(IP Multimedia Subsystem, IMS),讓使用者之間透過有線或無線的異質性通訊網路架構彼此分享多媒體影音資料。經過一連串的模擬實驗之後,實驗結果顯示本研究提出的影音資源分享機制(FSSVoD)確實可行,並在大多數的效能評比中較其他所有機制有更好的表現,包括最小的服務阻斷率、最小的服務中斷率、最小的平均等待服務時間以及最大的資料傳輸吞吐率。
In network-aware concept, applications are aware of network conditions and are adaptable to the varying environment to achieve acceptable and predictable performance. Two basic aspects of network-aware applications, network awareness and network adaptation, have been widely addressed in the literature. In this work, a solution for video on demand service that integrates wireless and wired networks by using the network aware concepts is proposed to reduce the blocking probability and dropping probability of mobile requests. Fuzzy logic inference system is employed to select appropriate cache relay nodes to cache published video streams and distribute them to different peers through service oriented architecture (SOA). SIP-based control protocol and IMS standard are adopted in this work to ensure the possibility of heterogeneous communication and provide a framework for delivering real-time multimedia services over an IP-based network to ensure interoperability, roaming, and end-to-end session management. The experimental results demonstrate that effectiveness and practicability of the proposed work.
第一章 緒論 1
第一節 研究背景與動機 1
第二節 研究目的 4
第三節 研究方法 6
第四節 預期成效 7
第五節 論文架構 8
第二章 文獻探討 9
第一節 次世代異質網路通訊架構 9
第二節 認知網路(Cognitive networks) 17
第三節 次世代網路環境之多媒體系統與隨選視訊服務 20
第四節 服務導向為目的之架構(Service Oriented Architecture, SOA) 26
第五節 機器學習(Machine Learning) 28
第三章 適用於次世代無線網路之跨層最佳化隨選視訊服務管理與傳送機制 38
第一節 以模糊邏輯為基礎之跨層最佳化影音資料來源選擇模組 43
第二節 以模糊邏輯為基礎之服務暫存器可適性評估模組 48
第三節 服務暫存點穩定度預測模組 51
第四節 適性化頻寬保留機制 57
第四章 實驗結果與分析 59
第一節 實驗情境設定 59
第二節 效能評估參數 61
第三節 模擬結果與分析 62
第五章 結論與未來工作 70
第一節 研究結論 70
第二節 未來研究工作 71
參考文獻 72
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