the transformation of SCP (Service Control Point) to support IMS service logic program is a general trend. Since the flexibility and scalability of the SIP
the service logic program development model of the existing intelligent network system has many drawbacks for IMS services. This paper presents a new service logic program development model
which uses C++ service logic program and the multi-thread technology etc
to support the IMS service better and provide a new idea to expand the service capacity of SCP.