A hybrid mapping algorithm for reconfigurable nanoarchitectures

Hessa K. Al-Mutairi, Imtiaz Ahmad


Nanotechnology is emerging as one of the most promising alternative technology toCMOS technology because of its higher density, high speed, lighter, and lower powerconsumption; however, defects are much higher in nanotechnology. Therefore, theneed for defect-tolerance techniques becomes crucial in nanotechnology. This paperaddresses an important intractable problem of finding a maximum size defect-freesub-crossbar in defective nano-scale crossbars for a higher yield. We propose a hybridmapping algorithm by embedding known greedy heuristics with genetic algorithm(GA) to search a large solution space effectively. The proposed algorithm exploits thedegrees of nodes, which play a crucial role in the selection mechanism in the greedymapping heuristics to generate a better quality solution. In the proposed algorithm,GA provides the selection order by generating a new set of degrees that are used by thegreedy mapping heuristic to find a new value for the defect-free sub-crossbar (k). Theexperimental results demonstrate the effectiveness of the proposed hybrid algorithmin finding a large size defect-free sub-crossbar compared to the existing state-of-theartgreedy heuristics.


Biclique problem; defect tolerance; genetic algorithm (GA); mapping algorithm; nano-crossbar switches; nanotechnology

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