In the 21st century's today, because of the computer and the telecommunication are combined with each other, VOIP (Voice over Internet Protocol) substitute for PSTN(Public Switched Telephone Network) stage by stage according to its cost and the quality of voice. VOIP digitizes analogic voice by software and hardware, and uses Packet Switching to transmit the packets in the IP network, its standard protocol are H.323, SIP, etc. H.323 is more complex and has more sub-protocol such that it is restricted by technicality. To compare with H.323, SIP is free. It can achieve the goal communication with PSTN through Gateway, and constructs a simple structure of VOIP. SIP has become the important protocol of NGN (Next Generation Networks) and 3G mutimedia systems. The structure of Client-Server of SIP is simple, but as long as the users increase, the Server may cause some trouble because of the great deal of information, and the VOIP network which depends on the Server will stop its service.
For this reason, we will improve the Client-Server structure in the paper, we wish that clients could communication with the others without the service of SIP Server to reduce the load, and improve the perfomance of SIP signaling.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0716109-145638 |
| Date | 16 July 2009 |
| Creators | Yeh, Po-ting |
| Contributors | Meng-Feng Tsai, Chun-Hung Lin, Cheng-Fu Chou, Ying-Chih Lin, Meng-Feng Tsai, Chun-Chao Yeh, Cheng-Fu Chou, Chun-Hung Lin, Ying-Chih Lin, Meng-Feng Tsai |
| 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-0716109-145638 |
| Rights | not_available, Copyright information available at source archive |
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