Pulse Power Ethernet Links With Offset Pairs for Data Integrity
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Solution Overview
Problem
Conventional Power over Ethernet (PoE) and Power over Data Line (PoDL) systems are limited in power capacity, typically delivering up to 100 W, which is inadequate for many devices, and face interference issues during pulse power transitions that can corrupt data transmission.
Innovation Solution
The method involves transmitting data on two wire pairs carrying pulse power, with voltage pulses offset between pairs to provide continuous power, and controlling data transmission during pulse power transitions to prevent interference, using techniques such as suspending data, applying Forward Error Correction, and marking packets for error or discard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If pulse power transitions are used to deliver high power, then power delivery capacity is improved, but data transmission reliability deteriorates due to interference and corruption
Solution Approach 1:
The patent segments the transmission medium into separate pairs: one pair dedicated to pulse power delivery and another pair dedicated to data transmission. This physical separation eliminates interference between power transitions and data signals, allowing high power delivery without compromising data reliability.
Solution Approach 2:
The patent extracts data transmission from the power delivery medium by using separate wire pairs. The data signal is taken out from the pulse power transmission path, preventing corruption during power transitions while maintaining high power delivery capacity.
2Reliability
If data transmission is controlled during pulse power transitions, then data corruption is prevented, but transmission efficiency decreases due to suspended data transmission
Solution Approach 1:
By segmenting the transmission medium into separate pairs for power and data, the patent eliminates the need to suspend data transmission during power transitions. Data can flow continuously on its dedicated pair while power transitions occur on the other pair, maintaining both reliability and efficiency.
Solution Approach 2:
The patent introduces a separate wire pair as an intermediary medium for data transmission. This intermediary path isolates data from the disruptive power transitions, allowing continuous data flow without corruption while power is delivered through pulse transitions on a different medium.
3Reliability
If Forward Error Correction is applied to data, then data integrity is improved during transitions, but device complexity increases
Solution Approach 1:
The patent uses segmentation to physically separate data transmission from power transitions, eliminating the need for complex error correction mechanisms. By preventing interference at the physical layer through separate wire pairs, simpler error handling is sufficient compared to applying FEC during transitions.
Data Source
AI summary
In one embodiment, a method includes transmitting pulse power on two wire pairs, the pulse power comprising a plurality of high voltage pulses with the high voltage pulses on the wire pairs offset between the wire pairs to provide continuous power, performing low voltage fault detection on each of the wire pairs between the high voltage pulses, and transmitting data on at least one of the wire pairs during transmittal of the high voltage pulses. Data transmittal is suspended during the low voltage fault detection.