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Design of a Scalable Optical Network-on-Chip by Reducing Role of Electrical Transactions

Aghaei Khouzani, Hoda | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40982 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Hesabi, Shahin
  7. Abstract:
  8. As the number of processing cores on a single chip continues to grow, the need for a high bandwidth, low power communication structure, will be the most important requirement of the next generation chip multiprocessors. Today, a major part of power consumption in multicore architectures belongs to interconnects. Due to these facts, reducing power consumption, as well as supporting high performance, is of major concern in these architectures. Optical interconnects have the potential to replace electrical wires to solve the bottleneck of communications in integrated circuits. Various routers and architectures with different points of view, have been recently designed considering existing demands, each having its advantages and disadvantages. The first presented structure is not scalable, and in second one packet delay increased due to the reservation phase. Another structure solved the scalability issue largely, while decreasing the delay of reservation. The main goal of this thesis is to reduce the power consumption through decreasing basic switching elements and utilizing potential of photonic technology. Then by designing a hybrid, hierarchical architecture, we intend to solve some difficulties in existing structures. To evaluate our design, at first we implement an ONoC simulator according to the proposed structure. Then we compare it with previous structures in 22nm technology. Decreasing the number of primary switching component leads to 50% reduction in power of central router in comparison of conventional structures. Also in final proposed network, the average power consumption of a packet is 115 mW which shows a significant improvement with respect to other existing networks.

  9. Keywords:
  10. Scalability ; Power Consumption ; Optical Networks ; Network-on-Chip (NOC) ; Optical Transfer

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