| The future network will be the service driven network, the service development and the fast deployment appears extremely importantly, becomes the present domestic and foreign telecommunication universal attention for this related future network in service correlation topic the research hot spot. In the future telecommunication business, there is not possibly only one "the murderer service". In the future, "the murderer service" will be the establishment in the open platform, providing the personalized multimedia services by the multitudinous content provider. But with the SIP appearance, it will make this kind of new service platform the appearance become possible.SIP (Session Initiation Protocal) is that IETF proposed the the application layer of multimedia commnication on the IP network in 1997.In make use of SIP to initiation, the establishment and the release, it supports the unicast, the multicast and the mobility; In addition, SIP also adjusts the dynamic alignment and the revision conversation attribute, such as the band width, the transmission medium type and the media decoding form, with the SDP coordination (SDP take SIP the news body). The basic function of SIP are consistent with Http and others protocol, based on the text, simple grammar and easy expansibility. In particular, the SIP uses the URL address mechanism, embodyed in the website easily.It can be able to combine with WEB naturely and be easy to be combiled with Internet Business.SIP is receiving more and more many values by its simple and smart technology.This paper describes in detail the basic agreement on the basis of SIP, implementation mechanism, the major functions of the news format.set the ISUP, multimedia conferencing systems, and accounting aspects of the expansion,and the SIP in the Next Generation Network based on the application especially in the soft-switching network call control processes... |
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