Implementação de uma solução modular e portável das funções de controle do nível 2 do sistema de sinalização por canal comum número 7 utilizando dispositivos de lógica programável

Abstract

The Common Channel Signaling System No. 7 (SS7) is one of the most important signaling systems used in today’s telecommunication networks and continues to be used on new architectures of fixed and mobile telephony. This dissertation presents an implementation for the control functions of the Signaling System Number 7 level 2 (referred in this work as MTP2-H) using the VHDL as the hardware description language. The specification of the control functions for the SS7 level 2 is made by using SDL diagrams described in Recommendation Q.703 of ITU-T. To accomplish the implementation, a methodology was developed for conversion of systems described in SDL to VHDL, consisting of a set of rules and a standard VHDL model that were applied on those SDL diagrams. The implementation was performed in order to provide the modularity and portability characteristics to the generated code. This way, the developed module can be replicated as many times as necessary in a programmable logic component (respecting the limitations of the component) and can also be synthesized in components from different manufacturers. The validation of implementation was done by means of functional tests using the Modelsim simulation tool. The developed code was compiled in development tools from different manufacturers to validate the portability feature and to estimate the amount of resources required in programmable logic components.