下一代VoIP通訊協定之研究與實作

The Research and Implementation on the Next Generation VoIP Protocol

呂政歷(Jeng-Li Lu)

指導教授 ： 黃紹華

國立臺北科技大學/機電學院/電機工程系所/碩士(2006年)

摘要

VoIP(Voice over IP)熱潮隨著時間有增無減，但世界標準組織所制定的VoIP通訊協定，因未考慮實際環境而存在著許多瑕疵，也因此讓Skype有機會一炮而紅，快速席捲市場，但Skype仍存在若干缺點，例如︰P2P(Peer-to-Peer)技術造成真實IP用戶之頻寬會被盜用，引發安全及法律問題。
因此，本文提出新一代通訊協定。此通訊協定分成兩部分，一為Call-Setup，另一為Media Session。Call-Setup部分採用P2P技術，為了防止伺服器遭攻擊或刻意封鎖之危險，並增加系統之穩定度，而Media-Session則採用Firewall / NAT Traversal技術，使得大量之影音封包得以分散於網路上，以降低伺服器頻寬與成本。
最後，我們制定一套混合式P2P網路系統，運用於即時通訊之實作上，完成新一代VoIP通訊協定之研究與實作。

關鍵字

VoIP ； P2P ； Peer-to-Peer ； Skype ； Firewall / NAT Traversal

並列摘要

VoIP(Voice over IP) upsurge is growing on and on with time. But the standard organization of the world makes VoIP communication protocol, because of not considering the real environment, causes a lot of flaws exist. Let Skype become much more hot and popular, sweep across market fast, but several shortcomings that Skype still exists, for example: P2P (Peer-to-Peer) technology causes true IP users bandwidth of network will be occupied, and it causes the safe and legal question.
So, this thesis will propose the communication protocol of new generation. It will divide into two parts, one is call-setup and another is media-session. Call-setup part adopts P2P technology, in order to prevent the danger that the server is attacked or blockading purposely, increase systematic stability degree. Media-session adopts Firewall and NAT traversal technology, it will make a large number of video-audio packages be dispersed in the network, in order to reduce the server which the bandwidth of network and cost operated.
Finally, we will design a set of hybrid P2P network system model, applying to the implementation of instant communication, and then the research and implementation of finishing VoIP communication protocol of the next generation.
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並列關鍵字

VoIP ； P2P ； Peer-to-Peer ； Skype ； Firewall / NAT Traversal

參考文獻

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[1] 陳冠霖，新一代VoIP通訊協定暨嵌入式閘道器之研究與實作，碩士論文，台北科技大學，電機工程研究所，台北市，2004。