PoE Management Controllers During AC Power Failure
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Solution Overview
Problem
Power failures can be catastrophic for remote and unattended information handling systems, such as servers and storage devices, as they render them unable to service user requests and maintain data integrity, and existing battery backup systems are unreliable and have limited lifespan.
Innovation Solution
The implementation of Power-over-Ethernet (PoE) compliant controllers and communication devices that continue to operate even during AC mains power loss, enabling continued communication and management, along with an intelligent power management system for dynamic or static power allocation among PoE devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery backup systems are used to maintain power during failures, then information handling systems can remain operational during power outages, but the batteries have limited lifespan and may malfunction or indicate false failure reports
Solution Approach 1:
The patent extracts the power supply function from the traditional battery backup system and relocates it to the PoE network infrastructure. By taking out the battery component entirely and replacing it with PoE-powered components (NICs, management controllers), the system eliminates battery lifespan limitations while maintaining continuous operation capability during AC power failures.
Solution Approach 2:
The patent introduces PoE network infrastructure as an intermediary power source between the AC mains and critical information handling components. The PoE switch and cables act as mediators that deliver power to NICs and management controllers, replacing the direct battery-to-component connection and eliminating battery-related reliability issues.
2Reliability
If battery backup systems are used to power critical interfaces, then systems can maintain communication during power outages, but the batteries add space requirements and may stretch to mechanical and electrical limits
Solution Approach 1:
The patent removes the physical battery component from the system architecture entirely. By extracting the battery and replacing it with PoE-powered network interface cards and management controllers, the system eliminates the space requirements for battery compartments, mounting structures, and associated hardware while maintaining power backup capability.
3Productivity
If traditional power systems are used, then systems can operate during normal conditions, but they become catastrophic when power failures occur at remote unattended locations
Solution Approach 1:
The patent makes the network interface card universal by giving it dual functionality: standard data communication during normal operation and autonomous power management during failures. The PoE-capable NIC serves both as a network interface and a powered device that can independently manage power from the network infrastructure, enabling remote systems to maintain operation regardless of location or AC power availability.
Solution Approach 2:
The patent enables self-service by allowing PoE-powered components to autonomously manage their own power supply from the network infrastructure. The NIC and management controllers automatically receive power through the Ethernet cable and can independently maintain operation during AC failures without requiring external battery systems or manual intervention, making remote unattended systems reliably self-sufficient.
Data Source
AI summary
A power over Ethernet (PoE) compliant device may be able to keep alive just enough of a management controller and/or target to respond to requests and tell a host (initiator) why it may be unable to respond to a data transfer request in a desired fashion due to a power failure. Thus only a small portion of an information handling system management capabilities need stay alive for reporting the operational condition of the overall information handling system during a power outage.