SNR Modeling and Analysis for Two Dimensional and Three Dimensional ONoC

The computational requirements leads to exponential rise of cores in the on-chip multiprocessor systems. As the cores are increasing, three dimensional (3D) integrated interconnect technologies getting significant importance. This leads to focus on design of 3D optical networks-on-chips (ONoC). The signal-to-noise ratio (SNR) is an essential performance parameter to analyse ONoCs. This work presents the SNR modeling and analysis of the two dimensional (2D) ONoCs and 3D ONoCs. The longest optical link of ONoC is selected for performance analysis. Here, the SNR performance of 2D and designed 3D ONoCs with increasing cores is accomplished using numerical simulation. For SNR calculations, average insertion loss and average crosstalk noise coefficient are calculated for three different routers: five port optical router, six port optical router and vertical router. After analysis, it is observed that the SNR of 3D ONoC is superior to 2D ONoC for increasing cores on-chip.