Interconnect Load Balancing for Stable Power Transitions
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Solution Overview
Problem
Conventional networking devices, such as switches, face inefficiencies in power management due to rapid changes in power consumption (dI/dT events) during transitions from idle to full operation or vice versa, leading to power supply issues like overshoots and undershoots, which conventional power supply systems struggle to manage effectively.
Innovation Solution
Implementing load balancing mechanisms in networking devices, including monitoring ingress bandwidth and queueing systems to detect sharp changes in traffic, and adjusting the scheduling of packets to mitigate these dI/dT events, thereby controlling power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a switch operates at full capacity to handle large amounts of data, then bandwidth and processing capability are improved, but power consumption increases significantly
Solution Approach 1:
The patent implements dynamic power management by adjusting the operational state of switch components based on real-time traffic conditions. The system transitions between different power states (idle, partial, full) depending on the detected traffic load, allowing the switch to optimize the balance between bandwidth handling capability and power consumption rather than operating at fixed full capacity
2Speed
If a switch transitions rapidly from idle to full power state, then response speed is improved, but power supply instability occurs due to extreme dI/dT
Solution Approach 1:
The patent applies preliminary action by detecting incoming traffic patterns before they require full switch operation. The system monitors traffic trends and proactively transitions through intermediate power states to prepare the power supply for upcoming demands, avoiding sudden full-power transitions that cause instability. This allows the system to respond to traffic surges while maintaining power supply reliability
Solution Approach 2:
The system implements beforehand cushioning by introducing intermediate power states between idle and full operation. Instead of directly transitioning from idle to full power (which causes extreme dI/dT and instability), the patent uses gradual transition steps that cushion the power supply against sudden current changes, thereby maintaining stability while still enabling rapid response to traffic demands
Data Source
AI summary
An interconnect device is provided. In one example, an interconnect device includes ports and circuits to determine a rate of change in a number of entries in a queue exceeds a first threshold or falls below a second threshold. In response to the rate of change in the number of entries in the queue exceeding the first threshold or falling below the second threshold, a rate at which packets to be transmitted from the interconnect device are processed for egress may be reduced to avoid an excessive drop or rise in power consumption of the interconnect device.