IP媒体流业务在3G移动网络中的应用

主要从理论上研究了3G网络中使用的一种流媒体的端到端QOS框架，探讨了运用PLMN中的多媒体流业务避免通过外部的IP-PDN访问流业务的可能性。在这个框架的基础上分析了流会话的UMTS和IETF下的协议之间的相互作用。这两组协议可以合作提供无缝的端到端的实时业务。特别是，本文提出P多媒体子系统可以利用实时流协议，将其控制范围从基于SP的业务延伸到基于R御的业务，如多媒体流媒体业务。在提出上述框架的基础上，本文还概括了3C移动网络中的音频流业务的提供。

Application of IP Multimedia Streaming Services in Third-generation Mobile Networks

An end-to-end QoS framework for streaming services in 3G mobile networks is studied and the possibility of applying IP multimedia streaming services in PLMN is discussed.Under this scenario,the interaction between UMTS and IETF's protocols and mechanisms for a streaming session are analyzed.It is shown that both groups of protocols and mechanisms can co-operate to provide seamless end-to-end real-time services.Specifically,the article proposes to make the IP multimedia subsystem aware of real time streaming protocol,in order to extend its control from SIP to RTSP-based services,such as multimedia streaming services.Supported by this proposed framework,provision of audio streaming services on 3G mobile networks is also outlined.