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http://dx.doi.org/10.5573/ieek.2013.50.10.082

A Minimum Wavelength Assignment Technique for Wavelength-routed Optical Network-on-Chip  

Kim, Youngseok (College of Information & Communication Engineering, Sungkyunkwan University)
Lee, Jae Hun (College of Information & Communication Engineering, Sungkyunkwan University)
Cui, Di (College of Information & Communication Engineering, Sungkyunkwan University)
Han, Tae Hee (College of Information & Communication Engineering, Sungkyunkwan University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.10, 2013 , pp. 82-90 More about this Journal
Abstract
An Optical Network-on-Chip(ONoC) based on silicon photonics is one of promising technology for next generation exascale computing architectures. Recent active researches on ONoC focus on improving bandwidth further and avoiding path collisions by using wavelength division multiplexing (WDM). However, the number of wavelengths used for the WDM increases linearly as the number of Processing Element (PE) increases in existing ONoCs which adopt centralized routing architecture. The problem will also arises growing cost of optical devices such as light switches and light sources and limits the scalability of ONoC due to the sinal loss caused by interference of distinct light sources. In this paper, we proposes a distributed routing architecture for ONoC which is based on 2D-mesh structure using WDM technique and present a method that minimize the required number of wavelengths exploiting the connectivity of communication. In comparison with existing centralized routing architectures, results show reduction by 56% of the number of wavelengths and 21% of the number of optical switches in $8{\times}8$ networks.
Keywords
Optical NoC; WDM; wavelength-routing; wavelength assignment;
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