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Reconfigurable routing protocol for free space optical sensor networks.

Rong Xie1, Won-Hyuk Yang, Young-Chon Kim

  • 1Department of Computer Engineering, Chonbuk National University, Jeonju 561-756, Korea. xierong@jbnu.ac.kr

Sensors (Basel, Switzerland)
|June 6, 2012
PubMed
Summary

Free space optical sensor networks (FSOSNs) face connectivity issues when nodes fail. A novel reconfigurable routing protocol (RRP) dynamically adjusts network topology to maintain performance and extend network lifetime.

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Network Engineering

Background:

  • Free space optical sensor networks (FSOSNs) offer advantages over traditional wireless sensor networks (WSNs) like higher capacity and security.
  • FSOSNs require a direct line-of-sight (LOS) path, making them vulnerable to node failures and data loss.

Purpose of the Study:

  • To propose a reconfigurable routing protocol (RRP) for FSOSNs to address connectivity degradation caused by node energy depletion.
  • To enhance network lifetime and data packet delivery ratio in FSOSNs.

Main Methods:

  • The RRP operates in three phases: virtual topology construction, routing establishment, and reconfigurable routing.
  • A node with low residual energy triggers reconfiguration, classifying affected nodes as maintenance or adjustment nodes.
Keywords:
free space optical sensor networks (FSOSNs)reconfigurationrouting

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  • An energy model was used to evaluate RRP performance via OPNET simulation.

    • Main Results:

    • The RRP demonstrated superior performance compared to simple-link and direct reconfiguration schemes.
    • Key performance indicators improved, including connectivity, network lifetime, packet delivery ratio, and the number of living nodes.

    Conclusions:

    • The proposed RRP effectively mitigates connectivity loss in FSOSNs due to node failures.
    • Dynamic reconfiguration of the virtual topology is crucial for robust and long-lasting FSOSN operation.