Improving the Routing Efficiency of SIP Instant Messages in Linphone

• Main Authors: Wenping Zhang, 張文萍
• Other Authors: Quincy Wu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/19160928144184588433

碩士 === 國立暨南國際大學 === 通訊工程研究所 === 97 === Session Initiation Protocol is a protocol proposed to support the multimedia transmission. Because of its low overhead, simple syntax, rich flexibility, and high extensibility, it is widely adopted in building real-time communication services. Instant message (IM) is one example among rich SIP applications. Instant message is a convenient communication way for people to keep in touch with friends and colleagues. However, using SIP to transmit instant messages is somehow inefficient, based on its request/response model. It is possible to improve SIP to provide the instant message service in a more efficient way by utilizing a recently proposed protocol MSRP (Message Session Relay Protocol). Moreover, Network Address Translation (NAT) traversal is also a problem which SIP and MSRP must solve.