Enterprise Instant Messaging System Based On Sip Is The Design And Implementation

SIP (session initiation protocol) is a simple application-layer control protocolproposed by IETF MMUSIC for the user to build multimedia session, and it is base ontext as to as HTTP. In the enterprise instant message (EIM) field, there are a variety ofdifferent communication protocols. However, the SIP protocol is not only simple, and itis easy to implement, easy to expand, but also independent with the bottomcommunication protocol. It is more efficient to implement multimedia interconnectionof the instant message system. Because it is easy to be integrated with other applicationsoftware, the enterprise instant communication system uses the SIP become first choice.First, in the thesis, the development background, current situation and someexisting problems of EIM are analyzed. Second, the principle of instant messaging andcommunication are introduced. The design of system has laid a theoretical foundation.Third, the protocol of the instant communication is discussed, and the merits with SIP andMXPP are compared. Four，according to the system demand, the EIM architecture, logicmodel base-on SIP is described, and main functions of the system is designed. At last,according to the logic model and the system main functions module in the thesis, thesystem implement functions of server and client based on SIP with analyzing the mostlykey technologies adopted in the processing of completing the system in detail.