Just-in-time Restoration with Distributed Fiber Sensing in Metropolitan Optical Networks
2026-06-08 • Networking and Internet Architecture
Networking and Internet Architecture
AI summaryⓘ
The authors studied how using Distributed Fiber Sensing (DFS) can help predict failures in metropolitan optical networks before they happen. They tested how well quick restoration methods work when they use DFS to anticipate problems, checking impacts on network performance like service interruptions and bandwidth issues. Their simulations showed that if DFS can predict failures about 15 milliseconds in advance, it can reduce disruptions by over 90%, maintaining service similarly to more resource-heavy protection methods but using fewer network resources. This suggests DFS can make optical networks more reliable without needing as much backup equipment.
Distributed Fiber Sensingoptical backscatteringmetropolitan optical networksjust-in-time restorationoptical amplifierscircuit disruptionsbandwidth blocking rateservice downtimeproactive restorationspectral resources
Authors
Sleman Mouammar, Italo B. Brasileiro, Andre C. Drummond
Abstract
Distributed Fiber Sensing (DFS) leverages optical backscattering signals to predict failure events and enable just-in-time restoration in metropolitan optical networks, i.e., without optical amplifiers. In this paper, we study the effectiveness of proactive restoration based on DFS information in all-optical networks, while considering different sensing devices' capabilities. We evaluate whether restoration can be provisioned just-in-time before a failure happens, and its impact on key performance metrics, including the number of affected and suspended optical circuits, bandwidth blocking rate, and service downtime. Simulation results demonstrate that just-in-time restoration enabled by DFS with a prediction time capability of 15~ms can reduce circuit disruptions by more than 90\% compared to restoration without sensing and ensure optical service continuity in optical networks comparable to resource-intensive protection schemes, at a fraction of the spectral resources.