IIN model: modifications and case study ?
Referring to IN/Internet interworking models proposed by International Telecommunication Union and Telecommunication standardization sector (ITU-T) and the Internet Engineering Task Force (IETF), a new model is proposed based on the China Mobile Intelligent Network version 02 (CMIN02) system from Beijing University of Posts and Telecommunications (BUPT). This model adds modifications and refinements to the former two reference models. This model can be divided into three layers horizontally and three sections vertically. Emphasis is put on the gateways due to their importance. Moreover, a novel notion called information flow trail is proposed, which is helpful in designing complex gateways. So far, most work on gateways focuses on studying simple cases where gateways have only two interfaces towards the outside. However, Management Gateway Function (MGF), Service Control Gateway Function (SCGF) and Call/Bearer Gateway Function (C/BGF) have more than two interfaces. In this case, the novel notion is quite helpful. During the implementation of Project 863 the modified model has been tested and proved viable.
internet interworking intelligent network gateway information flow trail