一种支持IP电话增值业务提供的分布业务体系结构

作为一种在PSTN中得到成功应用的技术,IN将在IP电话增值业务提供中具有重要的地位。但是当前的研究侧重于通过网关实现IN与Internet的互通,这种方案的不足之处在于沿袭了传统IN集中控制的缺点。该文的重要贡献在于重新定义了IN的概念模型,提出了一种适应于IP电话环境的分布IN体系结构,探讨了将网守扩展为SSP技术途径,并通过具体被叫付费业务的实现证明了该方案的可行性。研究表明,这种基于代理的业务结构能有效地克服了原有IN结构的缺陷,在分布控制、灵活性、客户化等方面有很大的优越性。此外,我们的方案还能与已有系统综合,具有良好的演进性。

DISTRIBUTED SERVICE ARCHITECTURE FOR IP TELEPHONY SERVICE PROVISION

As a winning approach in PSTN, IN will play an important role for IP telephony service provision. Current research efforts focus on interworking of IN and Internet via gateway. The problem of this solution is that it inherits the drawbacks of conventional IN. The main contribution of this article is to redefine the IN conceptual model and presents a distributed architecture to make it fit IP telephony platform. The possibility to enhance gatekeeper to be SSP is highlighted. To show that this solution is practical, an example of service implementation is given. Compared with traditional architecture, MA-based service architecture has many advantages in distributed control, service customization and flexibility. Besides, this approach can combine legacy systems and get a smooth evolution.