Pulse Power Initialization for Long-Range High-Power Ethernet
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Solution Overview
Problem
Conventional Power over Ethernet (PoE) systems are limited in range and power capacity, unable to efficiently deliver high power to devices like remote radio heads and access points, requiring additional AC outlets and being costly for installations where AC grid power is not feasible.
Innovation Solution
The implementation of a pulse power system that transmits high voltage pulse power over data cables, with safety features like fault detection and thermal management, enabling extended safe power delivery up to hundreds or thousands of watts without the need for additional power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional PoE systems deliver power over data cables, then power can be transmitted to devices, but the power capacity is limited and range is restricted to about one hundred meters
Solution Approach 1:
The patent employs pulse power transmission, delivering power in periodic pulses rather than continuous flow. This allows the system to transmit high power over extended distances by utilizing the cable's capacitance to store energy during pulses and deliver it to the powered device, overcoming the distance limitations of conventional continuous PoE systems
Solution Approach 2:
The system changes the electrical parameters by using high voltage pulse signals instead of conventional low voltage continuous power. By transforming the power delivery method to use higher voltages in pulsed form, the system can transmit significantly more power over longer distances while utilizing the existing cable infrastructure
2Power
If high power is transmitted over extended distances, then power delivery capability is improved, but safety risks and fault detection complexity increase
Solution Approach 1:
The system performs preliminary actions by conducting detection phases before full power transmission. It first sends detection signals to verify cable integrity and powered device presence, then gradually increases power delivery only after confirming safe operating conditions, thereby preventing safety hazards associated with high voltage pulse power transmission
Solution Approach 2:
The patent implements feedback mechanisms where the powered device sends status signals back to the power sourcing equipment. This allows continuous monitoring of the power transmission, enabling the system to detect faults, adjust power levels, and terminate transmission when safety thresholds are exceeded, ensuring reliable and safe operation
3Power
If additional power sources like AC outlets are installed, then power capacity is sufficient, but installation complexity and costs increase
Solution Approach 1:
The patent makes the data cable serve multiple functions by enabling it to carry both data communication and high power transmission simultaneously. This eliminates the need for separate power infrastructure like AC outlets and wiring, as the existing Ethernet cable infrastructure can be upgraded to handle both functions, significantly reducing installation complexity and costs
Data Source
AI summary
In one embodiment, a method includes identifying at a first powered device in communication with power sourcing equipment, a second powered device in communication with the first powered device, wherein the first powered device is receiving high voltage pulse power from the power sourcing equipment, notifying the power sourcing equipment of the second powered device at the first powered device, and performing a low voltage power initialization at the first powered device with the second powered device before passing the high voltage pulse power to the second powered device.