International Conference on Computer and Knowledge Engineering

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Two-step thermal-aware routing algorithm in 3D NoC

Authors :

Majid Nezarat¹ Masoume Momeni²

1- School of Electrical Engineering, Iran University of Science and Technology 2- School of Electrical Engineering, Iran University of Science and Technology

Keywords :

thermal-aware,index mechanism,routing,3D-NoC

Abstract :

By technology scaling and integrating many cores on a chip, two-dimensional (2D) NOCs face significant challenges. Three-dimensional (3D) NoCs have been introduced to improve the performance of 2D NoCs. However, 3D NoCs have some issues, including thermal challenges and implementation cost of Through Silicon Vias (TSV’s). In this paper, a partially connected 3D NOC is implemented, which employs a TSV index in the routing procedure. We propose a two-step thermal-aware routing algorithm that uses the index value to find the optimum 3D router to traverse between layers. This index informs about the position of the most suitable elevator for vertical transition. To overcome thermal challenges and distribute traffic over the low-temperature region of the network, we add thermal information to this index. The packets find the best elevator based on its distance to the 3D router and thermal information. The simulation results indicate that our routing algorithm improves network latency by 50% compared to other thermalaware routing algorithms.

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