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Distributed Detour Routing Scheme for Link Failure with Minimized Overhead in LEO Satellite Networks.

Jeongju Im1, Jiseung Youn2, Soohyeong Kim2

  • 1Major in Bio-Artificial Intelligence, Department of Applied Artificial Intelligence, Hanyang University, Ansan 15588, Republic of Korea.

Sensors (Basel, Switzerland)
|December 9, 2023
PubMed
Summary

This study introduces a new routing scheme for low Earth orbit (LEO) satellite networks to reduce communication overhead. The proposed method significantly cuts down on the massive communications needed for frequent route convergence in dynamic LEO environments.

Keywords:
LEO satellitecommunication overheaddistributed routingfloodinglink failure

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Area of Science:

  • Satellite Communications
  • Network Routing Protocols
  • Space Network Engineering

Background:

  • Low Earth orbit (LEO) satellite networks face dynamic topology changes due to satellite mobility and link instability.
  • Frequent topology changes necessitate massive communication overhead for route convergence, straining limited satellite resources.
  • Limited onboard power in LEO satellites makes minimizing communication overhead crucial for network lifespan and stable transmission.

Purpose of the Study:

  • To propose a distributed detour routing scheme designed to minimize communication overhead in LEO satellite networks.
  • To address the challenges of frequent route convergence and resource limitations in dynamic LEO network environments.

Main Methods:

  • A distributed detour routing scheme comprising rapid detour, selective flooding, and link recovery procedures.
  • Rapid detour utilizes precalculated routing tables for swift link failure detection.
  • Selective flooding identifies optimal detour points within minimal hop regions, followed by a link recovery procedure to restore the original path.

Main Results:

  • The proposed routing scheme significantly reduces communication overhead.
  • Achieved a 97.6% reduction in communication overhead compared to the n-hop flooding approach in simulations.
  • Demonstrated the effectiveness of rapid detour and selective flooding in managing dynamic network changes.

Conclusions:

  • The developed distributed detour routing scheme effectively minimizes communication overhead in LEO satellite networks.
  • This approach conserves limited satellite resources, potentially extending satellite lifespan and improving network stability.
  • The findings offer a viable solution for efficient routing in dynamic LEO satellite communication systems.