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  • 學位論文

異質性點對點即時串流轉播系統設計與實作

Heterogeneous Live P2P Streaming: System Design and Implementation

指導教授 : 周承復
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摘要


隨著寬頻網路的蓬勃發展,越來越多人會上網觀賞即時的節目轉播。使用同儕式的方式,提供影音串流的服務,可以充分利用使用者的上傳頻寬,達到減輕中央伺服器的負擔,及使系統能容納更多使用者的兩大優點。但同儕式的環境下,我們無法保證每個使用者鄰接的同伴,能夠提供足夠良好的觀賞品質,甚至對於行動裝置的使用者來說,他們自身的下載頻寬不足以得到良好的觀賞品質。我們設計並實作出一個點對點即時影音串流系統,除了參考傳統的作法之外,我們考慮影音串流中資料不同的重要性,讓較重要的資料優先被服務,提升觀賞品質。而針對日漸普及的行動裝置,我們利用其具有多網路介面的特性,使用短距離的網路介面,與鄰近的裝置合作,讓彼此能互助互利,不但得到較佳的觀賞品質,也達到節省電量消耗的效果。

並列摘要


With the fast development of broadband Internet access, more and more people watch streaming video over Internet. It is a hard task to implement a live P2P streaming system, which can satisfy the quality-of-service (QoS) of heterogeneous peers. We design and implement a live P2P streaming system with a QoS-aware mechanism, while peers exchange the video data, the more important data is served with higher priority. This mechanism improves the video quality of the peers in bad network condition. For modern mobile devices, they will suffer from the constrained energy supply and communication bandwidth. Since these devices have multiple communication interfaces, we develop an energy-efficient peer-assisted streaming system, peers can cooperative with nearby peers by short-range interface. It can reduce the energy consumption, and improve the video quality of mobile peers.

參考文獻


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