Context: - Complex many-cores and SoCs contain one (if not several) NoCs. NoC power consumption can represent a significant proportion (40%) of the overall power consumption. Power/energy challenges: - Estimate NoC power consumption at system-level, and bit accurately, without the need for electrical simulations. "Is it possible to shorten the simulation and still get good estimations?" - Design and test new coding strategies to reduce power consumption on links. "What is the energy impact at system-level?" "Is a single coding strategy always the best fit?" - Design space exploration of coding strategies. "Is it realistic in terms of simulation time and precision?