PoE Classification Voltage Signal Segmentation
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Solution Overview
Problem
The existing Power over Ethernet (PoE) standard's power classification method is imprecise, leading to underutilization of power budgets and excessive power reservation, as many devices do not continuously utilize their maximum power levels and may fall between classification levels.
Innovation Solution
A method and system that utilize a classification voltage with distinct signal elements to accurately determine the power requirements of powered devices, allowing for more precise power allocation by counting signal elements and adjusting current levels to select appropriate power classifications within existing PoE standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the PoE standard's power classification method is used, then powered devices can be detected and basic power allocation can be performed, but power allocation is imprecise leading to underutilization of power budgets and excessive power reservation
Solution Approach 1:
The patent segments the power classification into multiple subclasses (0-4) with finer granularity. Each subclass represents a more precise power consumption range, allowing the PSE to allocate power more accurately. This segmentation enables the system to distinguish between devices with similar but not identical power requirements, reducing both power wastage and underutilization.
Solution Approach 2:
The patent implements dynamic power allocation where the PSE continuously monitors actual power consumption and adjusts power allocation in real-time. The system transitions from static classification to dynamic adjustment, allowing powered devices to receive exactly the power they need based on actual consumption patterns rather than fixed maximum allocations.
2Reliability
If maximum power levels are reserved for all powered devices, then power availability is ensured, but power budget efficiency decreases and fewer devices can be supported
Solution Approach 1:
The patent applies partial action by allocating only the necessary portion of power to each device based on actual needs rather than reserving maximum power for all devices. The PSE monitors power consumption and allocates power dynamically, providing sufficient power for each device's actual requirements while maintaining the ability to support more devices within the same power budget.
3Adaptability or versatility
If five device classes (0-4) are defined in the PoE standard, then basic power classification is achieved, but classification precision is insufficient for devices that fall between classification levels
Solution Approach 1:
The patent further segments each of the five device classes into multiple subclasses. For example, class 1 is divided into subclasses 1.0 through 1.9, each representing a narrower power consumption range. This additional segmentation provides finer resolution for power classification, allowing devices with power requirements between traditional class boundaries to be accurately categorized and powered.
Data Source
AI summary
A method is disclosed that includes receiving a classification voltage at a powered device from a network. The classification voltage includes a baseline voltage level that is below an operating voltage range of the powered device and includes a sequence of distinct signal elements derived from the classification voltage. The method further includes detecting a number of signal elements of the sequence of distinct signal elements. A current is drawn until the number of signal elements exceeds a predetermined number.