Optical Network-on-Chip Subnet Segmentation for Congestion Reduction
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Solution Overview
Problem
In optical network-on-chip systems, the optical circuit exchange mechanism leads to low link utilization and severe network congestion due to the need for pre-allocation of communication resources, which limits system performance and scalability.
Innovation Solution
The system divides the optical network-on-chip into two subnets, with each pair of IP cores sharing a gateway, allowing flexible network connections and reducing communication resource requirements, thereby decreasing network congestion and improving transmission bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical circuit exchange mechanism is used with pre-allocated communication resources, then communication reliability is improved, but link utilization deteriorates and network congestion increases
Solution Approach 1:
The patent segments the optical network into multiple subnets, where each subnet is independently managed with its own routing resources. This segmentation allows different subnets to handle different traffic flows simultaneously, increasing overall link utilization while maintaining reliable communication within each subnet through dedicated resource allocation.
2Reliability
If optical circuit exchange mechanism is used with pre-allocated communication resources, then communication reliability is improved, but network congestion deteriorates
Solution Approach 1:
By dividing the network into multiple subnets, the patent isolates traffic flows so that congestion in one subnet does not propagate to other subnets. Each subnet maintains its own resource allocation, ensuring reliable communication while preventing system-wide congestion through localized traffic management.
3Adaptability or versatility
If Mesh or Torus topology is used in optical network-on-chip, then network connectivity is improved, but network diameter increases and average hop count increases
Solution Approach 1:
The patent divides the large-scale optical network into multiple smaller subnets, each with its own optimized topology. This segmentation reduces the network diameter within each subnet compared to a single large Mesh or Torus network, while maintaining overall network connectivity through inter-subnet routing. The average hop count is reduced because traffic is confined to smaller subnets rather than traversing the entire large network.
4Adaptability or versatility
If Mesh or Torus topology is used in optical network-on-chip, then network connectivity is improved, but resource reservation complexity increases
Solution Approach 1:
By segmenting the network into multiple subnets, the patent reduces resource reservation complexity within each subnet. Each subnet manages its own resources independently, which is simpler than managing resources across the entire large network. This segmentation maintains good network connectivity while making resource reservation more manageable through localized control.
Data Source
AI summary
An optical network-on-chip, an optical router, and a signal transmission method. The optical network-on-chip includes: N2 intellectual property IP cores, N2/2 gateways, and N2 optical routers. The N2 optical routers form two subnets, and every N2/2 optical routers form one subnet. Each gateway in the N2/2 gateways is connected to every two IP cores in the N2 IP cores, where IP cores connected to different gateways are different, and the two IP cores connected to each gateway are in one-to-one correspondences with the two subnets. The N2/2 gateways are in one-to-one correspondences with the N2/2 optical routers in each subnet in the two subnets, where each gateway is connected to an optical router that is in each subnet and that is corresponding to each gateway.