Power over Ethernet Device Pairing via Voltage-Based Activation
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Solution Overview
Problem
In power over cable systems, particularly in large-scale installations like video surveillance systems, manually configuring adapter devices and their connected terminal devices is time-consuming due to the need for knowledge of network identifiers and the limitations of low-power processing in adapter devices, which cannot be efficiently addressed by existing methods like Bluetooth mesh networks that rely on relay schemes.
Innovation Solution
A method for associating a controller with devices connected by a power-over-data linear bus, where a pairing message with a unique identifier is processed, and activation time periods are determined based on voltage measurements to ensure only one device is powered at a time, allowing for seamless pairing and addressing of devices without manual configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual configuration of adapter devices and terminal devices is performed, then network identifiers can be properly assigned, but significant time is required especially in large-scale installations
Solution Approach 1:
The pairing protocol enables devices to automatically configure themselves by exchanging pairing messages and obtaining network identifiers without human intervention. The adapter device and terminal device perform self-association through automated message exchange, eliminating the need for manual configuration while ensuring proper network identifier assignment.
Solution Approach 2:
The system performs preliminary power control by ensuring only one device is powered at a time during the pairing process. This preliminary action of controlling power state enables the device to be the sole active participant in message exchange, facilitating automatic configuration before full system operation begins.
2Reliability
If activation time periods are determined based on voltage measurements to ensure only one device is powered at a time, then seamless pairing is enabled, but additional processing steps are required
Solution Approach 1:
The system changes the power parameter dynamically by controlling which device receives power based on voltage measurements. By measuring voltage levels and determining activation time periods, the system ensures only one device is powered during pairing, improving reliability while the added voltage measurement step is a simple parameter check rather than complex processing.
3Use of energy by moving object
If low-power processing controllers are used in adapter devices, then power consumption is reduced, but processing capabilities are limited
Solution Approach 1:
The system segments the processing responsibilities by having the low-power controller in the adapter device handle only essential pairing functions (receiving pairing messages, determining activation times based on voltage), while more complex processing can be performed by terminal devices with higher processing capability. This segmentation allows the adapter to maintain low power consumption while still enabling seamless pairing operations.
Data Source
AI summary
There are provided methods for associating an adapter controller with a device, among a plurality of devices, for instance a Power over Ethernet device or its controller, each device of the plurality being connected to a controller interconnected to other controllers by a power-over-data linear bus to which an item of power source equipment is also connected. The methods comprises an exchange of a pairing message comprising a unique identifier of the device to be paired with, wherein only said device from which is the pairing message receives power at the time of receiving the pairing message by the controller among the plurality of devices.