網際網路發展至今已經越來越成熟，越來越多有關網路的應用也隨之而起，live video streaming是目前非常受到歡迎的項目之一，而其所運用的技術是從傳統的用戶端-伺服器端(Client-Server)架構一直發展到現在最為熱門的點對點(Peer-to-Peer,P2P)架構，使用傳統的Client-Server架構所面臨的問題在於無法做到頻寬節省，因此必須要花費龐大的資金去架設夠多的server來服務每個client，因此點對點(Peer-to-Peer,P2P)架構開始流行，藉由每個peer都去彼此分享自己的資料來達到頻寬放大與分散的目的，不過P2P架構卻會因為latency較大的關係使不同的client在收看live video streaming時client之間所收看到的畫面是不同步的，這個問題在我們收看一些球賽時的感受最大，當不同client在收看球賽時，可能有某個人已經看到球賽的結果在歡呼了，可是其他人卻因為latency等等的因素還沒看到結果，結果造成其他人因為聽到有人在歡呼而提早知道了結果，這對其他人是不公平的，因此為了使client之間的互動能夠一致，必須將P2P架構所造成的latency降到最低，這篇論文的目的就在於提出一種新的P2P設計架構來達到Low-Latency的目的並搭配實作來做測試。

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[2] Limelight Networks, http://www.limelightnetworks.com
[3] eMule, http://www.emule-project.net
[4] BitTorrent, http://www.bittorrent.com
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[20] RFC 1890, H. Schulzrinne, “RTP Profile for Audio and Video Conferences with Minimal Control,” January 1996.
[21] VLC Media Player, http://www.vlcmediaplayer.org