Network Device Restoring PoE Operation via Relay Switching
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Solution Overview
Problem
Existing network devices are unable to restore PoE operation in the Ethernet mode without disrupting Ethernet communication, as they lack a mechanism to provide power paths while maintaining data transmission.
Innovation Solution
The network device incorporates a configuration of relays, inductors, and capacitors that allow it to switch between states, restoring PoE operation by providing transmission paths for power signals while maintaining Ethernet communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device switches to Ethernet mode for data transmission, then Ethernet communication is maintained, but PoE operation cannot be restored due to lack of power paths
Solution Approach 1:
The patent segments the circuit into separate Ethernet data transmission paths and PoE power transmission paths. The Ethernet mode uses dedicated data transmission circuits while the PoE mode uses dedicated power transmission circuits, allowing independent operation and restoration of each function without interfering with the other.
Solution Approach 2:
The patent introduces relay switches as intermediary components that can dynamically route signals between different circuit paths. The relay acts as a mediator that connects or disconnects power transmission paths from Ethernet ports based on operational mode, enabling PoE restoration while maintaining Ethernet communication.
2Adaptability or versatility
If the network device provides power paths for PoE operation, then PoE capability is restored, but Ethernet communication may be disrupted
Solution Approach 1:
The patent employs dynamically controllable relay switches that can change their connection state based on operational requirements. The relays are controlled by a controller that monitors the operational mode and adjusts the circuit configuration in real-time, enabling seamless transition between Ethernet-only mode and PoE-restored mode without disrupting communication.
Solution Approach 2:
The patent pre-configures separate power transmission paths and data transmission paths before operation begins. The relay switches are positioned and wired in advance to enable quick switching between modes, and the controller is pre-programmed with the logic to detect mode changes and activate appropriate circuits, minimizing disruption during transitions.
3Ease of manufacture
If the network device uses a single cable for both data and power transmission, then infrastructure cost is reduced, but the device complexity increases to manage dual functions
Solution Approach 1:
The patent designs the Ethernet cable and connected devices to serve multiple functions - simultaneously or alternatively transmitting both data signals and power signals. The network device incorporates universal circuitry that can handle both data transmission and power delivery through the same cable interface, eliminating the need for separate power cables and reducing infrastructure requirements.
Solution Approach 2:
The patent implements automatic mode detection and circuit configuration through the controller that monitors port states and operational conditions. The system self-adjusts the relay switch positions and circuit connections based on detected requirements, eliminating the need for manual configuration and reducing the operational complexity despite the dual-function capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables the network device to resume PoE operation without affecting Ethernet communication, ensuring stable power supply and data transmission.
Implementation Method 1
a first inductor L1 coupled between a first terminal of the first relay RL1 and a PoE circuit 320
Implementation Method 2
a first capacitor C1 coupled between a third terminal of the first relay RL1 and a first terminal of a second relay RL1'
Implementation Method 3
a first relay RL1... a first terminal (common terminal) of the first relay RL1, a second terminal (normally-open terminal) of the first relay RL1, and a third terminal (normally-closed terminal) of the first relay RL1
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A network device includes two network ports, a PoE circuit, two network transformers, multiple inductors, multiple relays and a controller, wherein each network transformer is associated with two inductors and two relays. After the network device enters an Ethernet bypass mode by switching the operational states of its relays, PoE operation can be restored by the two inductors which provide a PoE power path without influencing Ethernet communication.