Design and Modelling of a Low-Latency Centralized Controller for Optical Integrated Networks

摘要

Optical integrated network (OIN) is a promising alternative to overcome the restrictions that electrical networks-on-chip (eNoCs) will face in the next generation of multiprocessor integrated systems due to electrical interconnects’ physical limitations. OINs present a higher bandwidth and lower power consumption but their full capabilities are curbed by high latency controllers. Control techniques, such as circuit switching, impose a high latency to perform the correct network routing and a better solution must be found in order to fully utilize OINs. In this letter, we have designed and modeled a low-latency centralized controller (LUCC). For validation purposes, we modeled different Mach–Zehnder interferometer (MZI)-based optical interconnects that employ the proposed LUCC. We obtain a response time of only one clock cycle when using the LUCC, even when conflicts are found.