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Parallel Rendezvous Strategy for Node Association in Wi-SUN FAN Networks.

Ananias Ambrosio Quispe1,2, Rodrigo Jardim Riella1,2, Luciana Michelotto Iantorno2

  • 1Department of Electrical Engineering, Federal University of Paraná-UFPR, Curitiba 81531-980, Brazil.

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|October 16, 2025
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Summary

The Parallel Rendezvous (PR) strategy significantly reduces Wi-SUN FAN (Wireless Smart Ubiquitous Network Field Area Network) node association time and energy consumption. This method optimizes connection processes in smart city and utility networks.

Keywords:
LLNWi-SUN FANparallel rendezvoustrickle timer

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Network Engineering

Background:

  • The Wi-SUN FAN standard enables large-scale connectivity for smart devices in utility networks and smart cities.
  • It is designed for Low-Power and Lossy Networks (LLNs), supporting mesh topologies and multi-hop transmissions.
  • The standard node association process involves five junction states, often leading to prolonged connection times, hindering scalability and reliability.

Purpose of the Study:

  • To analyze factors causing delays in the Wi-SUN FAN node association process, particularly in Join State 1 (JS1).
  • To propose a novel strategy, Parallel Rendezvous (PR), to accelerate the JS1 connection phase.
  • To evaluate the effectiveness of the PR Wi-SUN FAN algorithm in improving association time and energy efficiency.

Main Methods:

  • Focus on Join State 1 (JS1) delays caused by asynchronous PAN Advertisement (PA) packets and trickle timer algorithms.
  • Development and implementation of the Parallel Rendezvous (PR) strategy using PAN Advertisement Solicit (PAS) packets.
  • Simulation-based evaluation of the PR Wi-SUN FAN algorithm across linear, fully connected, and mesh network topologies.

Main Results:

  • The PR Wi-SUN FAN algorithm demonstrated notable improvements in association time and energy consumption across tested topologies.
  • Significant performance gains were observed in the linear topology.
  • Reductions of up to 71.22% in association time and 59.56% in energy consumption during JS1 were achieved in the linear scenario.

Conclusions:

  • The Parallel Rendezvous (PR) strategy effectively addresses the prolonged connection delays in Wi-SUN FAN's Join State 1.
  • PR Wi-SUN FAN enhances network scalability and reliability by optimizing the node association process.
  • The proposed algorithm offers substantial benefits for deploying large-scale wireless networks in smart cities and utility applications.