Reconfigurable RIS Links for Data Center Traffic Congestion
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Solution Overview
Problem
Current data center networks face challenges in managing unpredictable and unbalanced traffic due to fixed hierarchical topologies and inflexible links, leading to oversubscription and congestion, which existing wireless technologies struggle to address effectively due to high penetration loss and the requirement for Line-of-Sight links.
Innovation Solution
Implementing reconfigurable intelligent surfaces (RIS) within data centers to establish on-demand Line-of-Sight wireless communication links between components, using metasurfaces that can manipulate electromagnetic signals to adapt to traffic patterns and establish direct communication paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reconfigurable intelligent surfaces are used to establish Line-of-Sight wireless links, then bandwidth utilization and traffic management flexibility are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent introduces reconfigurable intelligent surfaces as intermediary components that mediate wireless signal propagation between data center components. These surfaces act as controllable reflectors that can dynamically steer and focus electromagnetic waves to establish Line-of-Sight links, thereby providing traffic management flexibility without requiring direct line-of-sight between transmitting and receiving antennas.
Solution Approach 2:
The reconfigurable intelligent surfaces utilize variable electrical parameters (such as impedance, phase shift, and amplitude control) of their constituent elements to dynamically adjust signal reflection characteristics. By changing these parameters in real-time, the system can adapt to different traffic patterns and establish optimal wireless communication paths, resolving the contradiction between adaptability and complexity through controlled parameter variation.
2Reliability
If traditional wired hierarchical topology is used, then system stability and reliability are maintained, but bandwidth utilization is limited due to oversubscription and congestion
Solution Approach 1:
The patent transforms the static wired hierarchical topology into a dynamic wireless system using reconfigurable intelligent surfaces. The wireless links can be dynamically established, reconfigured, and torn down based on real-time traffic demands, allowing the system to adapt its topology dynamically. This dynamic approach enables better bandwidth utilization while maintaining reliability through multiple possible communication paths.
Solution Approach 2:
The reconfigurable intelligent surfaces serve multiple functions: they act as signal reflectors, beam formers, and dynamic topology controllers simultaneously. This multi-functionality allows the same infrastructure to support both stable reliable communication and high bandwidth utilization by efficiently managing wireless resources across different traffic scenarios.
3Productivity
If high-frequency wireless technologies are used, then available bandwidth is increased, but penetration loss increases and Line-of-Sight requirements become more stringent
Solution Approach 1:
The reconfigurable intelligent surfaces are positioned and pre-configured to establish Line-of-Sight paths before high-frequency wireless communication begins. By preliminarily setting up the reflective surfaces at optimal locations and angles, the system ensures that direct propagation paths exist for millimeter-wave and terahertz signals, thereby enabling high bandwidth utilization while compensating for the inherent penetration losses of high-frequency technologies.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables flexible, cost-effective, and efficient management of data traffic by creating direct wireless links that alleviate oversubscription and congestion, optimizing bandwidth utilization and reducing operational costs.
Implementation Method 1
a reconfigurable intelligent surface (RIS) module to receive a first electromagnetic signal from a first component and emit a second electromagnetic signal toward a second component
Data Source
AI summary
A data center system having plural components including core switches and racks Ri, each rack Ri having plural servers; a global controller configured to control a traffic flow to each rack of the plural racks Ri; plural reconfigurable intelligent surface, RIS, modules, a RIS module being configured to receive a first electromagnetic signal from a first component and emit a second electromagnetic signal toward a second component, the second electromagnetic signal carrying a same information as the first electromagnetic signal; and a local controller configured to adjust an emitting direction of the second electromagnetic signal by changing a current flow through the RIS module.