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研究生:陳建志
研究生(外文):Chien-Chih Chen
論文名稱:提升P2P多媒體串流播放品質之研究
論文名稱(外文):Studies for Improving Playback Quality of P2P Multimedia Streaming
指導教授:張嘉銘張嘉銘引用關係
指導教授(外文):Chia-Ming Chang
口試委員:張嘉銘
口試委員(外文):Chia-Ming Chang
口試日期:2013-07-26
學位類別:碩士
校院名稱:大同大學
系所名稱:資訊工程學系(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:2013
畢業學年度:101
語文別:中文
論文頁數:40
中文關鍵詞:Bittorrent播放品質串流P2PPeerSim
外文關鍵詞:BittorrentPlay QualityStreamingP2PPeerSim
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隨著高頻寬網路的蓬勃發展,即時多媒體串流的應用越來越廣泛。傳統的主從式架構 (Client/Server) 有個缺點,就是伺服器的頻寬無法提供滿足所有客戶端的需求,因此 P2P 架構應運而生。而 P2P 網路可以利用使用者的上傳頻寬,達到減輕中央伺服器的負擔,並使系統能服務更多使用者的兩大優點。
本論文是以 Bittorrent 系統為基礎概念,所發展出的一套適合在 P2P 網路中 線上播放的串流播放機制。本文提出的方法是依端點的上傳頻寬和與需求端點間的延遲以計算成本,先廣播找近似最低成本且一定分塊範圍內端點不同的端點順
序,等到要求下載時,再評估此近似最低成本的端點順序依序下載,以達到需求端點能利用本機最大的下載頻寬,同時提升播放品質的效果。
本論文藉由一系列的模擬以驗證所提出的機制,由其模擬數據證明所提出的機制更適合在網路端點上傳頻寬高負載的狀況下運行。另外,在其他效能指標的表現上,除播放等待時間外,本論文的機制都有不同程度的改善。
With the rapid development of high bandwidth networks, the applications of real-time multimedia streaming is more and more widely. There is a drawback in the traditional Client/Server architecture, that is the server's bandwidth will never satisfy the needs of all clients. Therefore, P2P architecture was emerged. The P2P network can use the user's upload bandwidth to approach two major advantages: to reduce the network load on the central server and to service more users.
The proposed mechanism in this paper is based on the concepts of Bittorrent system. The proposed mechanism is more suitable for streaming online play in P2P network. First, the cost calculated from the uploading bandwidth and latency of each piece providing node. The downloading order of nodes are found by the broadcasting procedures, then the nodes of similar cost reply the broadcasting. When the download is demanded, these peers will be evaluated again then download as the order. It will reached the maximum utilization of the peer's download bandwidth, thereby enhancing the effect playback quality.
In this paper, we get the simulation data and verify the proposed mechanism by a series of simulations. From the simulation data, we can make the following conclusions. The proposed mechanism is more suitable when these peers in a highly busy uploading situation. In addition to start-delay time, the proposed mechanism has different degrees of improvement in the performance of other performance indicators.
誌謝 iii
摘要 iv
Abstract v
第 1 章序論 1
1.1 前言 1
1.2 研究動機與目的 2
1.3 章節介紹 3
第 2 章相關研究 4
2.1 BitTorrent 4
2.2 串流服務 6
2.3 相關文獻 8
第 3 章系統設計 13
3.1 簡介 13
3.2 系統架構 13
3.3 系統模組 15
3.3.1 系統模組改善 15
3.3.2 端點認知模組 16
3.3.3 找尋控制模組 19
3.3.4 下載控制模組 24
3.3.5 播放控制模組 28
第 4 章模擬實驗結果 29
4.1 模擬環境設定 29
4.1.1 模擬平台說明與設定 29
4.1.2 環境初始化與環境變化設定 30
4.2 模擬狀況與效能指標 31
4.2.1 模擬狀況 31
4.2.2 效能指標 32
4.3 模擬實驗結果與分析 32
4.3.1 播放類效能指標 33
4.3.2 其他類效能指標 35
4.4 小結 39
第 5 章結論 40
5.1 結論 40
5.2 未來展望 40
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