Energy efficient MPSoC on-chip communication bus synthesis using voltage scaling technique

This paper presents an energy efficient on-chip communication synthesis for shared bus based architecture. An assumption for the synthesis is that a system has already been partitioned and mapped onto the appropriate modules of a SoC so that size of data to be transferred at each time by an on-chip module is fixed. The problem of communication synthesis is modeled in NLP (nonlinear programming), which finds an energy efficient minimum number of bus(es) and an optimal size of bus width by simultaneously performing resource selection, scheduling, binding and voltage scaling of an on-chip bus. The supply voltage is scaled to reduce the total energy consumption of a bus by exploiting the slack of each on-chip module. The experimental results conducted on real-life examples, demonstrate the synthesis of an energy efficient communication bus with total energy saving up to 44.6% by scaling its supply voltage