Reverse Power Supply for Optical Access Equipment via Coaxial Cable
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Solution Overview
Problem
Hybrid fiber coaxial head-end equipment connected with a terminal in a home network faces challenges in obtaining electricity due to its position, as the passive optical fiber network and coaxial cable do not provide convenient power supply interfaces.
Innovation Solution
A power supply method and system that detects the working state of the terminal in the home network through a coaxial cable and controls power supply to the optical access equipment accordingly, using independent branch circuits for the terminal and optical access equipment, enabling reverse power supply and separating Radio Frequency communication signals from voltage signals for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If reverse power supply is implemented through coaxial cable to enable optical access equipment operation, then power supply capability is improved, but signal interference between power and communication signals may occur
Solution Approach 1:
The patent divides the coaxial cable transmission into separate channels: one for power supply (voltage signal) and another for communication (Radio Frequency signal). This segmentation allows both functions to operate simultaneously without interference, resolving the contradiction between enabling power supply and avoiding signal interference.
Solution Approach 2:
The patent introduces filtering circuits as intermediary components that selectively pass either power signals or communication signals while blocking the other. These filters act as mediators that prevent direct interaction between power and communication signals, eliminating interference while maintaining both functions.
2Reliability
If continuous power supply is provided to optical access equipment, then equipment operation reliability is improved, but energy waste increases when terminal is not in use
Solution Approach 1:
The patent implements dynamic power supply control where the power delivery to optical access equipment changes based on the terminal's working state. When the terminal is active, full power is supplied; when dormant or powered off, power supply is reduced or stopped. This dynamic adjustment maintains reliability during operation while eliminating energy waste during inactivity.
Solution Approach 2:
The system uses feedback from the terminal's working state detection to control the power supply. The terminal's state (powered on/dormant/off) is detected and fed back to the power control mechanism, which adjusts power delivery accordingly. This feedback loop ensures power is only consumed when needed, resolving the contradiction between reliability and energy efficiency.
3Adaptability or versatility
If miniature head-end equipment is deployed at user's door or corridor for FTTH access, then network coverage is improved, but power supply accessibility deteriorates
Solution Approach 1:
Instead of bringing power supply to the remote optical access equipment through traditional means, the patent inverts the approach by extracting power from the home network side (where power is easily accessible) and delivering it reversely through the coaxial cable to the optical access equipment. This inversion solves the power accessibility problem while maintaining flexible deployment locations for improved network coverage.
Data Source
AI summary
Disclosed are a power supply method, device and system. The method includes that: a working state of a terminal in a home network is detected, herein, the terminal accesses the home network through a coaxial cable; and power supply to optical access equipment is controlled according to the working state, herein, the optical access equipment is arranged to implement access of a passive optical fiber network to the home network.