Exploring and evaluating reliable communication in optical networks-on-chip using group counting method

摘要

The optical networks-on-chip (ONoCs) are gradually becoming the most promising candidate in multiprocessor systems-on-chip (MPSoCs). To further improve the reliability of information transmission by realizing error detection in the optical communication systems on-chip, the optical channel coding technology can be exploited into the ONoCs. In this paper, a novel silicon micro-ring resonators (MRs)-based optical group counting check technology is presented. Based on the proposed optical group counting check generator and calibration circuit, an on-chip optical information transmission mechanism with error detection retransmission is proposed and analyzed. In addition, the availability of the proposed method is verified during a case study in torus-based ONoCs with wavelength division multiplexing (WDM) using Crux optical router. The simulation results show that the proposed method can effectively improve the communication reliability of the ONoCs, significantly reduce the bit error rate (BER), and increase the Q factor. For example, when the network size of the WDM-based torus ONoCs is 6 x 5, the BER and Q factor of this network using group counting method with retransmission mechanism are 4.33 x 10(-10) and 6.10, which are respectively 3.916 x 10(-7) lower and 1.22 higher than the traditional WDM-based torus ONoCs communication. It follows that this work can greatly improve the reliability of optical information transmission, and then achieve the scale expansion of WDM-based ONoCs. (C) 2020 Elsevier B.V. All rights reserved.