Bi-Directional PoE Port Switching for Renewable Power Sharing
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Solution Overview
Problem
Conventional Power over Ethernet (PoE) systems are limited to point-to-point power distribution, lacking the capability to support bi-directional power flow, which is necessary for connecting devices like solar and battery systems in digital building applications.
Innovation Solution
A bi-directional PoE system that allows ports to operate as either Power Sourcing Equipment (PSE) or Powered Device (PD), enabling power to be transmitted or received based on available power sources, including solar and battery devices, while maintaining compatibility with IEEE 802.3 standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional PoE systems are used, then point-to-point power distribution is achieved, but bi-directional power flow capability is lost
Solution Approach 1:
The patent implements dynamic role assignment where PoE ports can switch between PSE and PD modes based on real-time power availability. The system continuously monitors power sources and dynamically reconfigures port roles, allowing a port to transition from power sourcing to power receiving mode as conditions change, thereby achieving bi-directional power flow capability
Solution Approach 2:
The patent creates universal PoE ports that can perform multiple functions - acting as either PSE or PD depending on system needs. This multi-functionality is achieved through a controller that manages power flow direction and port configuration, allowing the same hardware infrastructure to support both power distribution and power collection from renewable sources
2Adaptability or versatility
If PoE ports are configured as fixed PSE or PD, then simple power distribution is achieved, but flexibility in power source integration is reduced
Solution Approach 1:
The system employs dynamic role assignment where PoE ports are not statically configured but can switch between PSE and PD modes based on real-time power availability. The controller continuously monitors the system state and dynamically reconfigures port roles, allowing automatic adaptation when renewable energy sources become available or unavailable
Solution Approach 2:
The system implements self-service through automatic role negotiation and power flow management. When a renewable energy source is detected, the controller automatically configures the connected port as PSE and adjusts other ports accordingly, without requiring manual reconfiguration. The system autonomously manages the complexity of bi-directional power flow integration
3Adaptability or versatility
If bi-directional PoE system is implemented, then renewable energy integration is enabled, but compatibility with existing PoE standards becomes more challenging
Solution Approach 1:
The patent introduces a controller as an intermediary layer between the physical PoE interfaces and the bi-directional power management logic. This controller mediates the interaction with existing PoE devices by presenting standard PSE/PD behavior while internally managing the complex bi-directional power flow, thus maintaining compatibility with IEEE 802.3 standards while enabling renewable energy integration
Solution Approach 2:
The system dynamically adjusts its operational mode to maintain standards compatibility. When operating in conventional PoE mode, it behaves as a standard PSE or PD. When renewable energy is available, it dynamically switches to bi-directional mode, using the controller to manage the transition and ensure smooth operation with existing devices
Data Source
AI summary
A system includes a plurality of network devices comprising a plurality of ports, a power bus connecting the network devices, wherein power is shared between the network devices over the power bus, and a controller for identifying available power and allocating power to the ports. The ports include a plurality of PSE (Power Sourcing Equipment) PoE (Power over Ethernet) ports each operable to transmit power to a device connected to one of the PSE PoE ports, a plurality of PD (Powered Device) PoE ports each operable to receive power from a device connected to one of the PD PoE ports, and a plurality of bi-directional PoE ports each configurable to operate as a PSE PoE port to transmit power to a device connected to one of the bi-directional PoE ports or as a PD PoE port to receive power from the connected device.