| Full text | |
| Author(s): |
Colares, Robson A.
;
Rittner, Leticia
;
Conforti, Evandro
;
Mello, Darli A. A.
Total Authors: 4
|
| Document type: | Journal article |
| Source: | APPLIED SCIENCES-BASEL; v. 15, n. 6, p. 15-pg., 2025-03-14. |
| Abstract | |
This article adds to the emergent body of research that examines the potential of 6G as a platform that can combine wired and wireless sensing modalities. We apply vision transformers (ViTs) in a distributed fiber-optic sensing system to evaluate road traffic parameters in smart cities. Convolutional neural networks (CNNs) are also assessed for benchmarking. The experimental setup is based on a direct-detection phase-sensitive optical time-domain reflectometer (phi-OTDR) implemented using a narrow linewidth source. The monitored fibers are buried on the university campus, creating a smart city environment. Backscattered traces are consolidated into space-time matrices, illustrating traffic patterns and enabling analysis through image processing algorithms. The ground truth is established by traffic parameters obtained by processing video camera images monitoring the same street using the YOLOv8 model. The results indicate that ViTs outperform CNNs for estimating the number of vehicles and the mean vehicle speed. While a ViT necessitates a significantly larger number of parameters, its complexity is similar to that of a CNN when considering multiply-accumulate operations and random access memory usage. The processed dataset has been made publicly available for benchmarking. (AU) | |
| FAPESP's process: | 21/00199-8 - SMART NEtworks and ServiceS for 2030 (SMARTNESS) |
| Grantee: | Christian Rodolfo Esteve Rothenberg |
| Support Opportunities: | Research Grants - Applied Research Centers Program |
| FAPESP's process: | 22/07488-8 - Machine learning applications for advanced optical networks |
| Grantee: | Darli Augusto de Arruda Mello |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 21/11380-5 - CPTEn - São Paulo Center for the Study of Energy Transition |
| Grantee: | Luiz Carlos Pereira da Silva |
| Support Opportunities: | Research Grants - Science Centers for Development |
| FAPESP's process: | 22/11596-0 - Scientific EMU: acquisition of transmission and characterization equipment for ultra-high-speed data links |
| Grantee: | Darli Augusto de Arruda Mello |
| Support Opportunities: | Research Infrastructure Program - Scientific |
| FAPESP's process: | 22/12917-5 - Phase-sensitive OTDR-based distributed sensing for smart cities |
| Grantee: | Robson Assis Colares |
| Support Opportunities: | Scholarships in Brazil - Technical Training Program - Technical Training |
| FAPESP's process: | 21/06569-1 - High-speed strategic internet technologies |
| Grantee: | Evandro Conforti |
| Support Opportunities: | Research Projects - Thematic Grants |