Power Negotiation Protocol for Dynamic Inline Power Management
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Solution Overview
Problem
Current power management for inline powerable devices (PDs) and power-sourcing equipment (PSEs) is inefficient due to coarse IEEE classifications, leading to potential overconsumption of power and the need for manual intervention to ensure compatibility and efficient power allocation.
Innovation Solution
A power negotiation protocol that allows PDs and PSEs to dynamically negotiate and manage inline power consumption, ensuring that PDs do not exceed the power provided by PSEs, enabling fine-grained power management and interoperability without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IEEE Class 3 power allocation is used, then all Class 3 devices are guaranteed minimum power, but devices that need less power waste allocated power
Solution Approach 1:
The patent implements dynamic power negotiation between PSE and PD through multiple power request messages (first, second, third power requests) that allow the device to request different power levels based on actual needs. The PSE responds with power allocation messages that adjust the allocated power dynamically rather than using static IEEE class allocation, enabling power to be optimized in real-time while maintaining reliability guarantees.
2Reliability
If maximum power is reserved for all PDs, then power availability is ensured, but power management efficiency decreases
Solution Approach 1:
The patent establishes a feedback mechanism where the PD sends power request messages indicating its actual power needs, and the PSE sends power allocation messages confirming the allocated power. This bidirectional communication allows the system to adjust power allocation based on real-time requirements rather than reserving maximum power statically, improving management efficiency while ensuring availability when needed.
Solution Approach 2:
The system transitions from static power reservation to dynamic power negotiation through multiple communication stages. The PD can request different power levels in different stages (first, second, third requests), and the PSE adjusts allocations dynamically, enabling efficient power management that adapts to changing conditions while maintaining reliability.
3Adaptability or versatility
If coarse IEEE power classifications are used, then compatibility is simplified, but power allocation precision is reduced
Solution Approach 1:
The patent segments the power negotiation process into multiple distinct stages (first power request, second power request, third power request, power allocation messages). This segmentation allows the system to maintain the simplicity of IEEE class compatibility at the protocol level while achieving fine-grained power allocation precision through incremental negotiation and allocation adjustments across the multiple stages.
Data Source
AI summary
The present invention provides a power negotiation protocol that enables PDs and PSEs to negotiate the amount of inline power that a PD consumes and the corresponding PSE provides. This power negotiation allows the PDs provide fine-grained power consumption level to PSEs, and the PSEs are able to manage inline power efficiently using the negotiation protocol of the present invention. The PDs can ask the PSEs for more power when needed rather than having to constantly reserve the maximum amount of power they can consume at all times. Similarly, the PDs can release reservation of excess power when their respective power requirements decrease. The PSEs can limit the amount of power that can be consumed by the PD, thereby providing the ability for an administrator to control how much power a given PD can consume.