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彩铃业务作为一种重要的增值任务,已经在现有固定和移动网络得到了广泛的应用。随着IP多媒体子系统(IMS,IP Multimedia Subsystem)的引入,彩铃业务的多媒体特性得到了极大的增强,势必会在未来的业务发展中成为极具吸引力和商业价值的增值业务之一。文中通过对会话初始协议(SIP,Session Initial Protocol)进行研究,设计并实现了三种多媒体彩铃业务的实现方案,包括系统设计和信令流程,并对技术实现关键点及方案特点进行了分析。
As an important value-added task, CRBT service has been widely used in existing fixed and mobile networks. With the introduction of the IP Multimedia Subsystem (IMS), the multimedia features of CRBT services have been greatly enhanced and are bound to become one of the most attractive and commercial value-added services in the future business development. In this paper, through the study of Session Initial Protocol (SIP), we design and implement three kinds of multimedia CRBT service realization schemes, including system design and signaling flow, and analyze the key points and solutions of the technology.