Single-Pair Pulse Power Transmission Without Data Corruption
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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 during data transmission on single wire pairs.
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 and enabling higher power delivery up to 2000 W over Single Pair Ethernet (SPE) cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high voltage pulse power is transmitted over a wire pair to deliver higher power (up to 2000 W), then power delivery capacity is improved, but data corruption occurs during power transitions
Solution Approach 1:
The system segments the transmission medium into dedicated power delivery channels and data transmission channels. Power is delivered through pulse width modulated signals on the wire pair while data transmission occurs on separate communication channels, eliminating interference between power transitions and data signals. This segmentation allows high power delivery without corrupting data.
Solution Approach 2:
The system introduces an intermediary control mechanism that coordinates power delivery and data transmission. A controller manages the pulse power delivery timing and monitors data transmission status, inserting protective measures during power transitions to prevent data corruption while maintaining high power delivery capability.
2Reliability
If pulse power transitions are used to control data transmission, then data corruption is avoided, but transmission time is lost during power transitions
Solution Approach 1:
The system employs periodic pulse power delivery with controlled duty cycles. Power is delivered in periodic pulses rather than continuous flow, allowing data transmission to occur during intervals between pulses. This periodic action maintains data transmission reliability by avoiding corruption during transitions while minimizing time loss through optimized pulse timing and duty cycles.
Solution Approach 2:
The system performs preliminary coordination of power and data channels before actual transmission begins. The controller pre-synchronizes power pulse timing with data transmission schedules, and implements preliminary error detection and correction mechanisms to prevent data loss during power transitions, thereby reducing overall transmission time penalties.
3Reliability
If Forward Error Correction (FEC) is applied to protect data, then data integrity is improved, but processing complexity increases
Solution Approach 1:
The system extracts and separates error correction functionality into dedicated FEC modules that operate independently from the main data processing path. By taking out the error correction function and implementing it as a specialized subsystem, the main processing architecture remains simple while data integrity is enhanced through targeted FEC application only where power transitions may interfere with data.
4Device complexity
If Single Pair Ethernet (SPE) is used to deliver power and data, then installation complexity is reduced, but power capacity is limited compared to conventional PoE
Solution Approach 1:
The system fundamentally changes the power delivery parameters by switching from conventional continuous low-voltage PoE to high-voltage pulse width modulated power delivery. This parameter change enables SPE cables to deliver up to 2000 W of power while maintaining the simplified single-pair installation architecture. The pulse modulation technique allows high power transmission through the same SPE infrastructure without requiring additional wiring complexity.
Data Source
AI summary
In one embodiment, an apparatus includes an interface for transmitting pulse power and data to a powered device over a wire pair and a controller for receiving input identifying power transitions in the pulse power and suspending data transmission during the power transitions. A method is also disclosed herein.