Message Module Of Enterprise Instant Messaging System Design Based On SIP Protocol

With the current widespread use of the Internet Technology and Digital communication technology has become more and more sophisticated,the way we communicate is undergoing profound change all the time.Meanwhile,People increasingly rely on Internet technology and digital communication technology,that makes combined application of these two technologies has been a great development and progress.In this one,based on the development of multimedia communication applications is particularly prominent Internet.Under this trend,a variety of IP-based applications emerging,so instant messaging system has become an important application in nowadays no matter for individuals or for businesses.Instant messaging system development is inseparable from the application layer control protocol. SIP protocol draws HTTP, SMTP and other protocols,so it can support agent,redirection,target users registered and so on.In this thesis,we analyzed the Domestic and foreign research status of SIP applications,illustrated the significance of this thesis.After that,we tried to do a basic overview on SIP protocol include its concept,logic function entity and protocol architecture.Base on this study,we have designed and implemented an Instant messaging system that base on SIP protocol.We conducted a series of tests on the function of the system. At last, gave the software part of the system modules.