分析了现有IP多媒体子系统(IMS)业务触发数据存在的问题,给出了一种业务键的实现方式,业务键的存在可以使多个应用服务器(AS)之间的初始过滤准则(iFC)互不干扰,从而不会因为新业务的部署而引发新旧业务之间的冲突。接着对第三代合作伙伴计划(3GPP)业务触发和基于业务键的业务触发进行了性能建模,理论分析和仿真结果表明,通过增加业务键数据,可提高服务呼叫会话控制功能(S-CSCF)和AS的匹配效率,使S-CSCF在一次业务触发中可以触发多个业务,从而简化业务触发流程。基于业务键的业务触发方式可以有效地提高业务触发效率,增加系统的吞吐量,降低会话建立时延,提高IMS网络的服务质量(QoS)。
The paper analyzes the problem of present service triggering data in IP multimedia subsystem (IMS) networks and presents an implementation of the service key. The service key can make the initial cilter criteria (iFCs) among multiple application servers no interference each other, so that there are no conflicts between the new services and the old ones when deploying new wervices. And then the 3rd generation partnership project (3GPP) service triggering and the service key based service triggering are modelled. The theoretical analysis and simulation results show that, the new appended service key data improves the matching efficiency of the serving call session control function (S-CSCF) and application server (AS), makes the S-CSCF trigger multiple services in one time, and simplifies the process of service triggering. The service key based service triggering can improve the efficiency of service triggering, increase the throughput of the system, reduce the session setup delay efficiently, and improve the quality of service (QoS) of IMS networks.