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HoneyComb ROS: A 6 × 6 Non-Blocking Optical Switch with Optimized Reconfiguration for ONoCs

College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China
School of Electrical and Electronic Engineering, Anhui Science and Technology University, Chuzhou 233100, China
Author to whom correspondence should be addressed.
Electronics 2019, 8(8), 844;
Received: 30 May 2019 / Revised: 21 July 2019 / Accepted: 26 July 2019 / Published: 29 July 2019
(This article belongs to the Section Microelectronics and Optoelectronics)
PDF [5932 KB, uploaded 29 July 2019]


Silicon photonics has become a commonly used paradigm for on-chip interconnects to meet the requirements of higher bandwidth in computationally intensive applications for manycore processors. Design of an optical switch is a vital aspect while constructing an optical NoC topology which influences the performance of network. We present a HoneyComb optimized reconfigurable optical switch (HCROS), a 6 × 6 non-blocking optical switch where optimized reconfiguration of optical links utilizing the states of basic 2 × 2 optical switching elements (OSE) was achieved while keeping the input-output (I/O) interconnection intact. The proposed 6-port HCROS architecture was further optimized to reduce the number of OSEs to minimize overall power consumption. We proposed a generic algorithm to find the optimal switching combination of OSEs for a particular I/O link to minimize the insertion loss and power consumption. In comparison to other non-blocking architectures, a maximum of 66% reduction in OSEs was observed for the optimized HCROS, which consumes only 12 OSEs. Simulations were performed for all 720 I/O links in different configurations to evaluate the power consumption and insertion loss. We observed up to 92% power savings in the case of optimized HCROS as compared to un-optimized HCROS, and a 79% minimization in insertion loss was also reported as a result of optimization. View Full-Text
Keywords: optical switch; optical NoC (ONoC); reconfigurable; silicon nanophotonics optical switch; optical NoC (ONoC); reconfigurable; silicon nanophotonics

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Yahya, M.R.; Wu, N.; Yan, G.; Ahmed, T.; Zhang, J.; Zhang, Y. HoneyComb ROS: A 6 × 6 Non-Blocking Optical Switch with Optimized Reconfiguration for ONoCs. Electronics 2019, 8, 844.

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