Research And Implementation Of The Sip Protocol Stack

With the popularity of network and improving the quality of Internet multimedia communication technology has been rapid and extensive development. Internet telephone and video networks have changed people's way of life. In such an environment, the IETF's SIP. SIP is an abbreviation of Session Initiation Protocol. Session Initiation Protocol for the translation into Chinese. The agreement is simple, extensible, users with a powerful search and positioning capabilities, and closely linked with the existing Internet, and it is widely used.Most of the IP phone system is based on the H.323 protocol suite. H.323 follow the traditional telecommunications network operation and management, the more complex the agreement itself. IP telephony is inevitable when applied to the existence of defects. The perfect solution to a simple and flexible SIP H.323 defects more and more used in telecommunications voice and video communications in the course of conversation management.Stack is a good agreement is a prerequisite for the wide application of the agreement. Stack good stability, high efficiency, good interface and so on. With the extensive application of SIP upper urgent need for a high-performance application developers. The SIP stack is a good user interface.This paper introduces the background and development of the SIP process, a comparison of several revenue source code SIP Stack, After a detailed introduction of the xSip module design and implementation of the protocol stack. Finally introduction to the challenges and prospects for the development of SIP.