Passive Optical Network Mesh Fault Localization via LMTU Status
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, resulting in delayed fault mitigation.
Innovation Solution
A PON system with a wireless mesh network overlay that allows for real-time detection and localization of faults by transmitting optical connectivity status information to back-end servers, enabling precise geographical localization of faults without manual coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If technicians are dispatched to multiple locations based on per-LMTU loss of service notifications, then coverage of affected areas is improved, but fault localization precision deteriorates
Solution Approach 1:
The system implements feedback by having LMTUs continuously report their operational status and optical connectivity information to the backend server. When a fiber cut occurs, the server collects status reports from multiple LMTUs, analyzes the pattern of failures, and uses this feedback to precisely locate the fault. This eliminates the need for technicians to manually investigate multiple locations by providing accurate fault location data from the start.
Solution Approach 2:
The backend server acts as an intermediary that receives status information from multiple LMTUs and processes this data to determine the fault location. Instead of technicians directly investigating each LMTU location, the server mediates between the distributed LMTUs and the technicians, consolidating information and providing a single precise fault location that optimizes technician dispatch.
2Measurement precision
If manual coordination of investigative efforts is implemented, then fault localization precision is improved, but response time deteriorates
Solution Approach 1:
The system implements self-service by automatically collecting status information from all LMTUs, analyzing the data patterns, and determining the fault location without requiring manual coordination between technicians. The backend server autonomously processes the information and provides the fault location, eliminating the time-consuming manual coordination process while maintaining high localization precision.
Solution Approach 2:
The patent replaces the mechanical system of manual coordination (technicians communicating and coordinating in the field) with an automated information processing system. The backend server electronically collects, analyzes, and processes status data from multiple LMTUs, substituting human coordination efforts with automated computational analysis that is both faster and more precise.
3Speed
If optical connectivity status information is transmitted via wireless mesh network, then fault detection speed is improved, but system complexity increases
Solution Approach 1:
The LMTUs serve multiple functions: they act as both optical network termination devices and wireless mesh network nodes. By making the LMTUs multi-functional, the system can transmit optical connectivity status information through the existing wireless mesh infrastructure without adding separate dedicated monitoring devices, thus improving fault detection speed while limiting the increase in overall system complexity.
Solution Approach 2:
The wireless mesh network acts as an intermediary communication channel between the LMTUs and the backend server. Instead of requiring direct optical connections or dedicated monitoring infrastructure, the status information is transmitted through the existing wireless mesh network that already connects the LMTUs, enabling fast fault detection while utilizing existing infrastructure to minimize complexity increases.
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.