1. Introduction
In is an intelligent system that provides the abilities to establish vendor independence and to introduce new services and develop new sources of revenue rapidly. In recent years, with the persistent increase of the customers of IN services and frequent emergence of various new IN Services, IN technology has permeated widely and expanded to many other application fields. However, the traditional IN architecture is based on a highly centralized service control model, and the communication protocol, INAP, is based on a classical Client/Server model. Some connatural shortcomings of traditional IN have emerged while service traffic increase persistently and the demands of new services become more and more insistent:
Since service control logics are only stationed in SCP, every IN service must be processed under the control of SCP, Therefore, SCP is prone to becoming the bottleneck of entire system.
SCP communications with SSP via SS7. All IN services will be unavailable if failures make the signaling network down.
Traditional IN only provides limited support for personal intelligent services to meet special demands, though service providers have abilities to create new customized services.
SIB-based service modeling is not object-oriented and is thus lacking of reusability and flexibility.