Designs of low insertion loss optical router and reliable routing for 3D optical network-on-chip

三维光片上网络中低插入损耗光路由器和可靠性路由设计

Abstract

Three-Dimensional Optical Network-on-Chip (3D ONoC) has recently emerged as a high-performance on-chip communication solution; however, owing to the intrinsic characteristics of photonic devices in existing 3D ONoC, the insertion loss caused by undesirable coupling among optical signals degrades network performance. Considering manufacturing defects and unpredictable noise sources that cause the failure of Optical Routers (ORs) in 3D ONoC, previous work simply abandoned the disabled OR when computing the restore path. In this paper, we propose a new OR structure that reduces insertion loss, and we present the design of a novel adaptive routing algorithm, FTRA-BL, based on the new OR structure with bidirectional waveguides, without abandoning any disabled ORs. Our FTRA-BL selects the normal waveguide in the disabled OR as the backup link so that the best macroscopic restore path can be guaranteed. Simulation results show that our method performs better than previous work in improving transmission reliability and latency.

摘要

创新点

  1. 1

    提出一种新的适合三维 Torus 拓扑的光路由器结构, 具有低插入损耗和高可扩展能力。

  2. 2.

    利用几何分析方法对网络中使用的光开关进行建模, 并利用传输矩阵分析光开关插入损耗。

  3. 3.

    提出适合光片上网络的可靠性路由策略, 并将故障粒度降低至光路由器内部, 提升了网络抗毁性能。

  4. 4.

    首次将单个波导双向传输策略引入到光片上网络中, 并提出双向链路的切换/控制机制。

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Correspondence to Weigang Hou.

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Guo, P., Hou, W. & Guo, L. Designs of low insertion loss optical router and reliable routing for 3D optical network-on-chip. Sci. China Inf. Sci. 59, 102302 (2016). https://doi.org/10.1007/s11432-016-0326-1

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Keywords

  • 3D ONoC
  • low insertion loss
  • reliable routing
  • bidirectional waveguide
  • low latency

关键词

  • 三维光片上网络
  • 低插入损耗
  • 可靠性路由
  • 双向波导
  • 低时延