| Along with the unceasing development of network and multimedia technology, multimedia communication service gradually occupies a dominant position in Internet application. Because traditional IP network is based on"best-effort service", it lacks effective service management strategy, and cannot give the multimedia real-time provision of QoS guarantee. The SIP protocol is a core protocol of next generation network system by IETF, which is a signaling control protocol working on application level, and may be used to establish, revise and terminate multimedia session process, and SIP is the direction of future multimedia communication-developed technology. How to provide QoS safeguard plan for multimedia real-time business which is based on the SIP is a current hot research topic.Through studying and researching on SIP protocol and QoS, in the foundation of analyzing each kind of existing QoS safeguard plan, it has realized a system structure with the QoS performance safeguard which based on the SIP agreement, has emphatically studied QoS stratification structure and called processing of discrimination grade service which based on the SIP protocol expanse, and has carried the simulation experiment and performance analysis on the proposed structure. |
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