Reverse Powering Control for Telecommunications Nodes
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Solution Overview
Problem
In Fibre-to-the-Distribution Point (FttDP) systems, existing reverse powering technologies lack effective control mechanisms, especially during start-up and power interruptions, as they are isolated from element management and rely on operational xDSL protocols for power control, which are unavailable without power.
Innovation Solution
A power insertion system with modems capable of operating in a dormant phase using scavenged power for control message transmission, allowing initiation of a higher power output and integration with element management for seamless power delivery and shutdown processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If xDSL protocols are used for power control, then power management can be achieved, but the system cannot operate during start-up or power interruptions when xDSL is not operational
Solution Approach 1:
The system segments the communication protocol into two distinct phases: a dormant phase using a simplified protocol for basic power control and presence detection, and an active phase using full xDSL protocols for comprehensive power management. This segmentation allows the system to function reliably during start-up with limited capabilities while achieving full power control reliability once the connection is established.
Solution Approach 2:
The system performs preliminary actions during the dormant phase by establishing basic power control capabilities and detecting the presence of the remote unit before full xDSL communication is available. This preliminary power setup enables the system to transition smoothly into the active phase, ensuring reliability is established before complex power management operations begin.
2Measurement precision
If manual adjustments are made to ANU settings, then control precision can be achieved, but the system becomes difficult to operate when ANU is located in inaccessible positions
Solution Approach 1:
The system replaces the mechanical approach of manual physical access to ANU devices with electronic communication through the telecommunication line. Control messages are transmitted electronically to configure power parameters, detect presence, and manage power delivery remotely, eliminating the need for physical access to inaccessible locations while maintaining precise control.
Solution Approach 2:
The telecommunication line serves as an intermediary carrier that transmits control messages between the local exchange and the remotely located ANU. This intermediary enables precise power control configuration to be delivered electronically to inaccessible devices, combining measurement precision with ease of remote operation.
3Power
If high power is transmitted during dormant phase, then power availability is improved, but power consumption and energy loss increase
Solution Approach 1:
During the dormant phase, the system applies partial action by transmitting only the minimum necessary power required for presence detection and basic control operations. Full power is withheld until the active phase begins, reducing energy consumption during the dormant period while ensuring sufficient power availability when needed. This partial power transmission resolves the contradiction between maintaining power availability and minimizing energy loss.
Data Source
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AI summary
To initiate the transmission of electrical power over a telecommunications connection (14) from a power-collecting telecommunications interface unit (16) such as a customer premises equipment, connectable to a power supply (18), to a power-receiving unit (22, Fig 4) such as a kerbside electrical/cptical interface, when a connection (14) is first established, or the collecting unit is first powered up, or in order to re-establish connection after a power outage, control signals are transmitted between low-power modems (55) in the interface units using a low-power communications protocol. This allows the controlled initiation of a larger power output and a higher speed exchange of data once the full telecommunications connection has been established. A low-powered beacon signal is transmitted over the telecommunications connection (14) by the power-collecting telecommunications interface unit on connection to a power supply (18), for detection by the power-receiving telecommunications interface unit. In the event of a loss of power at the input (18), the low power modem (55) initiates power management control signals to cause the power-receiving telecommunications interface to shut down certain functions in order to preserve backup power for essential "lifeline" services.