Mesh-Based Fault Localization in Passive Optical Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional passive optical networks (PON) face challenges in accurately locating fiber cuts or faults, leading to inefficient dispatch of technicians to multiple locations without knowing the systemic extent of the issue, requiring manual coordination to narrow down the fault location.
Innovation Solution
A PON system incorporating a wireless mesh network overlay that allows for automatic fault localization by transmitting optical node statuses to back-end servers, enabling precise identification of fault locations within the PON, even when components are compromised or not operating at full capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If technicians are dispatched to multiple locations to investigate fiber cuts, then the probability of locating the fault increases, but the loss of time and operational efficiency deteriorate due to manual coordination and multiple dispatches
Solution Approach 1:
The system performs preliminary fault detection and localization before technicians are dispatched. Optical nodes automatically detect faults and transmit status information through the wireless mesh network to the back-end server, which calculates the fault location in advance. This preliminary action eliminates the need for technicians to manually investigate multiple locations, directly resolving the contradiction between fault location accuracy and time loss.
Solution Approach 2:
The wireless mesh network acts as an intermediary between the optical nodes and the back-end server. It carries status information from compromised optical nodes to the server, enabling automatic fault localization without requiring direct physical investigation by technicians. This intermediary system resolves the contradiction by providing accurate fault location information remotely and efficiently.
2Productivity
If a wireless mesh network overlay is implemented for fault detection, then fault localization speed and automation improve, but the device complexity increases due to additional network infrastructure
Solution Approach 1:
The wireless mesh network serves multiple functions: it provides customer wireless service and simultaneously carries fault status information from optical nodes to the back-end server. This multi-functionality allows the same infrastructure to support both service delivery and fault detection, resolving the contradiction between productivity improvement and device complexity by eliminating redundant systems.
Solution Approach 2:
Optical nodes automatically detect faults and transmit their status information through the wireless mesh network without requiring external intervention. The system self-monitors and self-reports faults, enabling automatic fault localization. This self-service capability improves productivity while minimizing the need for additional complex monitoring infrastructure.
Data Source
AI summary
A PON system includes both a PON via which optical services are delivered and a wireless network overlaying the PON. The wireless network may be a self-organizing wireless mesh network, and may generally operate as a logical signaling pathway via which information regarding optical states/statuses of PON components and/or related information is delivered from the field to back-end servers of the PON system. Accordingly, the system may include multiple in-common nodes (e.g., OLTs, LMTUs, etc.) which are included in both the PON and the wireless network. Based on optical information received via the wireless network, the servers can localize the physical location of a PON fault to a particular geographical region of multiple regions serviced by the PON (in some cases narrowing the fault's physical location to a particular span, FDH, or optical terminal), and may dispatch a technician directly to the localized physical location to address the fault.