Rollback Links Characterization for the Snapshot Routing Algorithm in Polar-Orbit Satellite Networks

  • TANG Zhu
    College of Computer, National University of Defense Technology
  • WU Chunqing
    College of Computer, National University of Defense Technology
  • FENG Zhenqian
    College of Computer, National University of Defense Technology
  • YU Wanrong
    College of Computer, National University of Defense Technology
  • ZHAO Baokang
    College of Computer, National University of Defense Technology
  • HAN Wei
    College of Computer, National University of Defense Technology

抄録

In this paper, we analyze the rollback traffic in polar-orbit satellite networks that use the snapshot routing algorithm. The concept of diamond rollback links and polar rollback links are presented for the first time, and the numbers of diamond and polar rollback links in polar-orbit satellite networks are concisely formulated. Simulations are performed based on the Iridium and Teledesic system in NS2, and the results finally confirm our analysis. With this work, we can not only simplify the rollback loops avoidance scheme, but also provide guidance for future satellite network routing optimization and topology design.

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