Event-B is the promising approach applied on several domains, it can be used to specify, prove and develop SoCs and MPSoCs models incrementally using the refinement . The suggested new refinement approach consists of suggesting new concepts and constraints related to the reliabilit y of QNoCs and the over-cost related to the solutions of FPGA-Based technology fault-tolerance in the reason of practically managing the comple xit y caused by the extremely large number of variables used in the VHDL code (last step of the refinement) which are describing the state of QNoC systems. To remediate to this problem, we introduce concepts of decomposition and Re-composition that use three new operat ors (Rename, Enrich, Ensure) that they are linking together and used to enhance the Event-B refinement to finally make it more and more structural.

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Abstract:The need for high performance, available and reliable embedded systems has made computing systems increasingly complex. Formal methods have the ability to produce critical systems for large industrial projects, and this by creating an original mathematical model that can be formally refined in levels until the final refinement which contains enough of details for an implementation. This work is a first step of VHDL code generation process, it represents how to elaborate formally an embedded system using Abstract data type in a form of theories (NoC, WNoC, colored graph, VHDL) and how to ensure in systematic way all the details and complexity of this system using operators of refinement (Create, Rename, Restrict, Enrich)that are recently proposed for the Event-B method. All the theories are deployed, discharged and used in Event-B models to represent and enhance the performance of this self-organization reliability solution for the wireless sensors network of NoC-based system. This paper summerize the fruit of using new proposed approach for the Event-B formal method that persist the NoC-based ditributed system instead of consuming more than 70% of realization time with any analytic method.