The Realization Of MTP3(B) Protocol In Signalling System NO.7

Signalling System is one of the important and indispensable technologies in modern communication networks. As a nerve center of modern communication networks, Signalling System No.7 become more and more important in communication networks. Thus, how to make the Signalling System No.7 more efficient and more stable is still a research highlight of many communication equipment manufacturers and research institutions.This project, as a joint effort with Shanghai Network Research Centre of Datang Mobile Company, aims to build a unified software platform for the system of the company. My task is to implement the MTP3(B) protocol in Transfer Network Subsystem(based on Signalling System No.7) . The MTP3(B) protocol, which is the third layer of message transfer part(MTP) in Signalling System No.7, can be divided into two parts: Message Handling part and Signalling Network Management part. The main function of MTP3(B) protocol is to provide reliable signaling transfer service to upper-layer users and to execute network management functions when failure occurs to the link or relay point in the signalling network, so that reliable transmission of signalling message units can be achieved. Hence, MTP3(B) protocol plays an important role in Signalling System No.7.In this paper, we present functions and structures of the MTP3(B) module, the entity of MTP3(B) protocol in the Unified Software Platform, and propose an improved Dynamic-Routing algorithm in Signalling System No.7 to solve the dynamic route problem occurred in early communication equipements of the company. We also present the latest testing results of the MTP3(B) module.