Design and implementation of simplified signalling system for distributed communication networks

Abstract

Signalling System is the most important part of a communication system. Signalling System Seven (SS7) was introduced to enable both analog and digital voice communication, data communication and connection less communication between diversified communications networks. A huge number of organizations, institutes, manufacturers, service providers are developing and implementing new signalling systems and protocols to meet communications demand for customized products but still keeping the interoperability with the standard signalling systems and protocols. Such initiatives are absent in Bangladesh. This work is an initiative to develop our own customized solutions for special communications products and services in the ever growing diversified field of communications. With this end in view, a novel signalling system named as "Bus Independent Signalling (BIS)" has been proposed and developed as part of the current research work. The proposed BIS system is an Open System Interconnection (OSI) layer-4 protocol, and can be transferred over very simple physical or transmission layers like RS-232, RS-485 and the popular TCP/IP. Being dynamic in nature, it can also carry the user data as the payload of the BIS messages in the OSI application layer. Thus, using the proposed BIS system, both simple and large distributed communication networks can be built, and a lot of telecommunication products can be developed. Such an application is also developed and implemented in this research work. A future roadmap is also proposed to take the BIS to a useful base for telecommunications products and services in Bangladesh. The BIS protocol has the advantages of dynamic system configuration for the maximum optimization of resources. It has the capability of self synchronization to be able to transfer data over both synchronous and asynchronous transmission buses. It supports both packed and unpacked data, real-time and omine data for point to point and point to multi-point communications. Thus, the proposed BIS system can be used for a diversified field of applications.