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Radio Wave Propagation and WSN Deployment in Complex Utility Tunnel Environments.

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Wireless communication in underground tunnels is crucial for smart city safety. This study analyzes LoRaWAN and ZigBee channel characteristics in urban tunnels, validating simulations with real-world measurements for optimal network deployment.

Keywords:
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Area of Science:

  • Electrical Engineering
  • Wireless Communications
  • Urban Planning

Background:

  • Smart cities increasingly rely on wireless systems for public and utility services.
  • Underground utility tunnels present unique wireless coverage challenges, posing risks to maintenance personnel.
  • Ensuring reliable connectivity in these environments is vital for safety, surveillance, and monitoring.

Purpose of the Study:

  • To characterize wireless channels within complex urban utility tunnels.
  • To assess the suitability of LoRaWAN and ZigBee technologies for underground deployments.
  • To provide a validated radio planning approach for robust wireless sensor networks in tunnels.

Main Methods:

  • Modeling and simulation of a real urban utility tunnel using a 3D ray-launching (3D-RL) code.
  • Consideration of complex tunnel elements like metallic service trays and pathways in simulations.
  • Calibration and verification of the 3D-RL simulation model with experimental measurements.

Main Results:

  • The 3D-RL simulation code accurately predicted radio wave propagation in the complex tunnel environment.
  • Simulation and experimental measurement results showed good agreement, validating the model.
  • A comprehensive wireless sensor network (WSN) deployment strategy was presented.

Conclusions:

  • The study provides an effective radio planning methodology for deploying wireless systems in urban utility tunnels.
  • Validated simulation models enable optimal coverage and enhanced quality of service for underground wireless networks.
  • The findings support the implementation of secure and safe working conditions through reliable remote monitoring and data access.