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研究生:張峻豪
研究生(外文):Chun-hao Chang
論文名稱:建構最小傳輸延遲的點對點即時影像串流之拓樸結構
論文名稱(外文):Smart-Fit: Peer-to-Peer Topology Construction Strategy for Live Video Streaming towards Minimized Delay
指導教授:李宗南李宗南引用關係
指導教授(外文):Chung-nan Lee
學位類別:碩士
校院名稱:國立中山大學
系所名稱:資訊工程學系研究所
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:2009
畢業學年度:97
語文別:英文
論文頁數:46
中文關鍵詞:點對點拓樸結構即時影像傳輸延遲
外文關鍵詞:Transmission delayTopology constructionVideo streamingPeer-to-Peer
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隨著網路使用者網路頻寬的大增,利用點對點傳輸技術達到即時影像串流已經是一個可行的技術。然而,目前對於點對點即時影像傳輸延遲的研究,依然不多見。本篇論文提出了一個點對點的網路拓樸結構建構法,使得使用者收到即時影像的延遲可以減小。本方法利用減少使用者與視訊伺服器之間的hop數為出發點,並以網路使用者網路頻寬分佈為基礎,建構出一個預測理想模型。接著使用者的加入離開與系統的拓樸,皆依照預測的模型來建構。實驗結果顯示,本篇論文所提出的方法成功的減少使用者與視訊伺服器之間的hop數,並且減少實際傳輸延遲。除此之外,利用本方法也可以有效減少傳輸時的封包遺失率。
Due to the fast growing bandwidth of Internet users, the P2P video streaming on the Internet becomes one of impaortant solutions to release the traffic load. However, the current studies fall short of addressing the video delay issue on live P2P streaming. In this research, we proposed a topology construction method: Smart-Fit, towards minimizing the transmission delay between users and video server. The concept is based on minimizing the hop counts between server and users, in further to reduce the delay. With the bandwidth variety of Internet users, the proppsed method builds a predicted ideal template. Then the users’ joining and leaving behaviors and the system’s topology are constructed according to the template. Simulation results show the proposed method successfully reduces the hop count and the transmission delay between users and server. Moreover, due to the reduction of hop count, the packet loss rate is also reduced.
1. Introduction 1
1.1 Problem Statement 2
2. Related Work 3
3. Preliminaries and Definitions 4
3.1 Network Delay 4
3.1.1 Effects of Delay 5
3.2 The Definition of Average Hop Count 7
3.3 The Preliminaries 6
4. The Proposed Method 8
4.1 Strategy: Random 8
4.2 Strategy: Best-Place First 9
4.2.1 Local Optimum of Best-Place First 11
4.3 The Framework of the Minimum Hop Count Topology 14
4.4 The Placement Dilemma 14
4.5 The Smart-Fit Strategy 16
4.5.1 Building Template 16
4.5.2 Arrival of Peers 18
4.5.3 Deviations 19
4.5.4 Departure of Peers 20
4.5.5 The Smart-Fit Algorithm 22
5. Experimental Results 25
5.1 Average Hop Count 26
5.2 Average Packet Delay 28
5.3 Packet Loss Rate 30
5.4 Server Bandwidth Utilization 33
5.5 The Control Overhead 33
5.6 The Parent Waiting Time of Smart-Fit 34
5.7 The effect of predicting period T in Smart-Fit 35
6. Conclusions 37
References 38
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