Network Interface Bypass for Inoperable Devices
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Solution Overview
Problem
In daisy chain connected Ethernet networks, the failure of one network device disrupts the flow of audio and video signals to all subsequent devices, causing service outages and potential loss of income, particularly in environments like airplanes where continuous content distribution is critical.
Innovation Solution
A network interface apparatus comprising transformers and a switch assembly that can bypass an inoperable network device by switching between normal and bypass modes, allowing signal continuity without the need for active devices or power supplies, using a watchdog circuit to control the switch and maintain high-speed communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a daisy chain connected network is used to distribute audio and video signals, then the system design is simplified and cable length is minimized, but the failure of one network device causes signal disruption to all subsequent devices
Solution Approach 1:
The network interface apparatus is divided into distinct functional segments: a network port interface, a bypass switch assembly, and a terminal interface. This segmentation allows the bypass functionality to be independently activated when a device fails, enabling signal routing around the failed device while maintaining the overall daisy chain structure. The segmentation resolves the contradiction by allowing simple daisy chain topology while adding localized reliability through modular bypass capability.
Solution Approach 2:
A bypass switch assembly acts as an intermediary component between the network port and terminal interface. This intermediary contains a switch that can redirect signals around the terminal interface when failure is detected. The watchdog circuit serves as another intermediary that monitors device health and controls the bypass switch state. This intermediary mechanism enables the system to maintain signal continuity despite individual device failures, resolving the reliability issue while preserving the simple daisy chain architecture.
2Reliability
If active devices and power supplies are added to enable bypass functionality, then network device failure can be bypassed, but device complexity and power requirements increase
Solution Approach 1:
The network interface apparatus performs self-diagnosis through the watchdog circuit, which automatically detects device failure and triggers the bypass mechanism without external intervention. The system serves itself by monitoring its own operational status and autonomously switching to bypass mode when needed. This self-service capability reduces the need for complex external control systems while maintaining reliability, as the bypass functionality activates automatically based on detected failure conditions.
Solution Approach 2:
The patent replaces complex mechanical or manually-operated bypass mechanisms with an electronically-controlled switch assembly driven by a watchdog circuit. Instead of requiring physical switching devices or manual intervention, the system uses electronic detection and control to automate the bypass process. This substitution reduces mechanical complexity while maintaining the ability to bypass failed devices, resolving the contradiction between reliability improvement and device complexity.
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
Enables uninterrupted audio and video signal distribution by bypassing failed network devices, ensuring continuous service and minimizing passenger dissatisfaction and revenue loss in environments like airplanes.
Implementation Method 1
first and second transformers, wherein a network input and a network output are respectively coupled to a first side of the first transformer and a first side of the second transformer
Data Source
AI summary
A network interface apparatus is capable of bypassing an inoperable or failed network device. According to an exemplary embodiment, the network interface apparatus includes first and second transformers. A network input and a network output are respectively coupled to a first side of the first transformer and a first side of the second transformer. A terminal input and a terminal output are respectively coupled to a second side of the first transformer and a second side of the second transformer. A switch assembly is coupled to the second sides of the first and second transformers. When the switch assembly is in a first state, the second side of the first transformer is coupled to the terminal output, and when the switch assembly is in a second state, the second side of the first transformer is coupled to the first side of the second transformer bypassing the terminal output.