基于半呼叫的SSF模型

The SSF Model Based on Partly Calls Model

在半呼叫模型中,要很好地协调业务控制功能SCF和呼叫控制功能CCF,始终是业务交换功能SSF的难点。本文提出一个SSF模型的建立方案。该模型以单点控制为核心,独立区分上下两层功能单元的命令,灵活满足独立业务的需求,解决多业务的冲突问题,并实现多业务的触发。建立触发检出表EDP、事件检出表TDP和业务冲突表CDP是实现上述功能的重要手段,并结合了会话功能SESSION实现业务的映射,从而建立一个高效的SSF模型。

The BICC agreement which planted in backbone network is Bearer-Independent-Call-Control protocol. This agreement is used for distinguishing the call controlling function （CCF） and service controlling function（SCF）, used the ＂partly calls model＂. Nevertheless, it is difficult to harmonizing the SCF and CCF by service switch function （SSF）. The main body of this paper brings forward a SSF model. That model is centering on single detection point controlling, distinguishing the orders from SCF and CCF, supplying the service needs, solving the conflicting problem and triggering the services. The EDP table, TDP table and the CDP table are the ways for actualizing those ideals. All of them combined with the SESSION have built a high-effect SSF model.