Instead of using the public switched telephone network, VoIP (Voice-over-IP) services exchange voice information over Internet. Therefore, VoIP can services with their advantage of low rates. SIP (Session Initiation Protocol) is scalable, easy to implement, and requires less setup time than its predecessor protocols. Therefore, SIP becomes one of the major signaling protocols used in VoIP. SIP uses Client-Server architecture which is simple and easy to maintain. But Client-Server architecture may cause problems while the clients increase. For the reason, IETF (The Internet Engineering Task Force) drafts discusses using P2P (Peer-to-Peer) architecture in SIP protocol to avoid the weaknesses of Client-Server architecture, and hopes to provide good voice quality by using P2P architecture.
In this paper, we discuss how to design and implement an embedded P2PSIP(Peer-to-Peer Session Initiation Protocol) user agent based on SIP standard. First, we analyze all kind of the major P2P structures, and discuss the advantage and disadvantage of them. Second, our design needs to consider the embedded systems which have limited resources. Using cache is a good solution. Finally, we confront the problem and try to solve it.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0716109-155046 |
| Date | 16 July 2009 |
| Creators | Hsu, Wen-yao |
| Contributors | Chun-Hung Lin, Chun-Hsin Wu, Ying-Chih Lin, Rung-Hung Gau, Wei-Kuang Lai |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0716109-155046 |
| Rights | not_available, Copyright information available at source archive |
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