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Reliable Adaptive Wavelength Modulation for Optical Networks-on-Chip

Karimi, Roshanak | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47380 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Hessabi, Shahin; Koohi, Somayyeh
  7. Abstract:
  8. Integrating hundreds of cores on a single chip necessitates high performance interconnection network. Due to great delay and power consumption of electrical networks in global connections, their use might be limited in future. Optical networks-on-chip are introduced recently as a proper alternative for electrical networks by providing high bandwidth, low latency, and low power consumption. Despite these outstanding advantages, optical component behavior is very sensitive to temperature fluctuations. Specifically, thermal variations affect refractive index of semiconductor, which in turn change resonating wavelength of micro-ring resonator. Therefore, the switch cannot operate properly and data will be lost, reducing reliability of network. We propose an Efficient Reliable All-optical Network-on-Chip (ERANoC) which avoids occurring fault in hot regions by using alternative paths provided in network. ERANoC mainly addresses reliability, but it improves performance and throughput simultaneously. In addition, we have proposed an All-optical Router for Torus (ART) which is the first non-blocking router proposed for this topology. ART uses an optimum allocation of wavelengths to paths. Networks are implemented in OMNeT++. Results show that by eliminating electrical control network, we have gained 98% improvement on performance in comparison to previous work. Also, reliability and throughput have been improved by 30% and 28%, respectively. Low overhead of proposed networks makes them a suitable choice for being used in optical networks on chip
  9. Keywords:
  10. On-Chip Optical Network ; Reliability ; Temperature Variation ; Micro-ring Resonator ; Optical Router

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