Physically Aware Wavelength-Routed Optical NoC Design for Customized Topologies with Parallel Switching Elements and Sequence-Based Models
Part Of
Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC
Start Page
560
End Page
566
ISBN (of the container)
979-840070635-6
Date Issued
2025-01-20
Author(s)
Abstract
The wavelength-routed optical network-on-chip (WRONoC) is a promising solution for system-on-chip designs. Recent work in the WRONoC topology designs mainly utilizes crossing switching elements (CSEs) as switching mechanisms on predefined templates. However, using CSEs incurs more microring resonator (MRR) usage and waveguide crossings than parallel switching elements (PSEs), and their predefined templates constrain the solution spaces. To remedy these disadvantages, we propose a fully automated topology design flow that utilizes PSE structures to reduce MRR usage and waveguide crossings. Our add-drop filter sequence model expands the solution space and leverages the advantage of the crossing-free PSE structure. Our fixed-node crossing-aware edge routing effectively minimizes the waveguide crossings, and our A*-search preserves the admissibility property and guarantees an optimal routing solution. Besides, our design flow thoroughly considers the physical layout information. Experimental results show that our design substantially outperforms state-of-the-art works on customized designs.
Publisher
ACM
Type
conference paper