Single-Pair Pulse Power Transmission With FEC for Data Integrity

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Solution Overview

Problem

Conventional Power over Ethernet (PoE) systems are limited in power capacity and range, often requiring additional power sources for devices needing more than 100 W, and face data corruption issues due to high voltage pulse power transitions in Single Pair Ethernet (SPE) cables.

Innovation Solution

Implementing a system that uses pulse power transitions to control data transmission, applies Forward Error Correction (FEC) to protect data, and modulates pulse power for control plane data, thereby avoiding data corruption during pulse power transitions in SPE cables.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If high voltage pulse power is transmitted over Single Pair Ethernet cable, then power delivery capacity is increased to hundreds or thousands of watts, but data corruption occurs during power transitions

Engineering Contradiction:

Improvepower delivery capacityVSAvoiddata integrity

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The transmission medium is segmented into separate channels: one for power transmission and another for data transmission. The system uses a single-pair cable with dedicated power transmission capability while maintaining separate data signaling paths, isolating data signals from high-voltage power transitions to prevent corruption

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Data transmission is suspended before power transitions occur. The system detects upcoming power transition events and proactively halts data transmission during these critical periods, preventing data corruption before it can occur. This preliminary action ensures data integrity while allowing high-power transmission

Inventive Principle:

Principle #10Preliminary action

2Reliability

If data transmission is suspended during power transitions, then data corruption is avoided, but data transmission efficiency decreases

Engineering Contradiction:

Improvedata integrityVSAvoiddata transmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Data transmission operates in periodic intervals, alternating between active transmission and suspension phases. During non-transition periods, data transmission proceeds at full rate; during power transition periods, transmission is temporarily suspended. This periodic pattern minimizes the impact on overall efficiency while maintaining data integrity during critical transitions

Inventive Principle:

Principle #19Periodic action

3Reliability

If Forward Error Correction is applied to protect data, then data reliability is improved, but processing complexity increases

Engineering Contradiction:

Improvedata reliabilityVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Forward Error Correction codes act as an intermediary layer between the data transmission channel and the application layer. The FEC mechanism detects and corrects errors introduced during transmission without requiring complex retransmission protocols, providing enhanced reliability through standardized error correction algorithms

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12061506B2Transmission of pulse power and data over a wire pair

Publication Date: 2024.08.13 CISCO TECHNOLOGY INC

AI summary

In one embodiment, a method includes applying Forward Error Correction (FEC) to data at power sourcing equipment, transmitting the data and pulse power over a wire pair to a powered device, identifying data transmitted during power transitions between a pulse power on time and a pulse power off time in the pulse power at the powered device, and applying FEC decoding to at least a portion of the data based on said identified power transitions.