PoE Powered Device Fallback Power Communication Protocol
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Power over Ethernet (PoE) systems, seamless transition between primary and backup power sources is challenging, leading to unpredictable device behavior during local power source failures, as conventional communication mechanisms are inadequate for managing power interruptions and fallback scenarios.
Innovation Solution
The implementation of enhanced communication protocols between Powered Devices (PD) and Power Sourcing Equipment (PSE) to define controlled fallback states and power requirements, enabling seamless transition to secondary PoE power sources by signaling power needs and fallback parameters, such as 'dying gasp' messages and power levels, to ensure consistent device operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional communication mechanisms are used between PD and PSE, then the system structure remains simple, but seamless transition between primary and backup power sources cannot be achieved, leading to unpredictable device behavior during power failures
Solution Approach 1:
The patent applies preliminary action by having the PD communicate its power failure response capability to the PSE before the actual power failure occurs. This allows the PSE to prepare and initiate the fallback state transition proactively, ensuring seamless power source switching and predictable device behavior during the transition from primary to backup power.
2Ease of operation
If enhanced communication protocols are implemented to signal power needs and fallback parameters, then seamless transition to backup power is enabled, but the communication mechanism becomes more complex
Solution Approach 1:
The patent implements feedback by establishing a communication loop where the PD informs the PSE of its power failure response capability, and the PSE responds by initiating appropriate fallback states. This feedback mechanism enables coordinated, seamless transition between power sources while maintaining manageable protocol complexity through structured information exchange.
3Duration of action of stationary object
If the PD enters fallback state immediately upon power interruption, then power continuity is maintained, but device functionality may be compromised without proper coordination with PSE
Solution Approach 1:
The patent applies preliminary action by having the PD pre-communicate its power failure response capability to the PSE before the power failure occurs. This allows the PSE to anticipate the need for fallback power and initiate the transition proactively, ensuring both power continuity and predictable device operation during the switchover.
Solution Approach 2:
The patent uses feedback to coordinate the fallback state transition. The PD provides feedback about its power failure response capability, and the PSE uses this information to determine when and how to initiate the fallback state, ensuring that power continuity is maintained while device operation remains predictable and coordinated.
Data Source
AI summary
A system and method for communicating information relating to powered device (PD) power interruption and associated power sourcing equipment (PSE) fallback power. A PD can be powered using a primary local power source and a secondary power over Ethernet (PoE) power source. The PD communication can provide information that relates to PSE power delivery to the PD that is contingent upon detection of a failure occurring at the powered device.