Publications Conference paper · Delay-tolerant networks · 2017

On the Performance Analysis of Disruption Tolerant Satellite Networks under Uncertainties

Pablo G. Madoery, Fernando D. Raverta, Juan A. Fraire, and Jorge M. Finochietto

Workshop on Information Processing and Control (RPIC), pp. 1–6, 2017

Abstract

Collaborative Earth observation satellite constellations are arising as a new paradigm with important advantages in comparison with traditional monolithic systems. In this context, Disruptions Tolerant Networking (DTN) protocols were proposed to provide efficient and autonomous store-and-forward data transport. Although a scheduled contact plan can be used to optimize routing and data delivery metrics, significant challenges remains in studying the capacity of recovering from unplanned events. In this work we analyze, by means of simulation, the sensitivity of state-of-the art DTN routing algorithms towards transient faults occurring both in random and critical points in the satellite network. Furthermore, obtained results provides enough evidence that the a priori knowledge of the fault rate of DTN nodes can be used to further improve data delivery, which motivates future enhancements in the existing routing solutions.

Cite

DOI 10.23919/rpic.2017.8214346

BibTeX

@inproceedings{madoery2017performance,
  author    = {Madoery, Pablo G. and Raverta, Fernando D. and Fraire, Juan A. and Finochietto, Jorge M.},
  title     = {On the Performance Analysis of Disruption Tolerant Satellite Networks under Uncertainties},
  booktitle = {Workshop on Information Processing and Control (RPIC)},
  pages     = {1--6},
  publisher = {{IEEE}},
  year      = {2017},
  doi       = {10.23919/rpic.2017.8214346}
}

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Abstract
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During the past 20 years, space communications technologies have shown limited progress in comparison to Internet-based networks on Earth. However, a brand new working group of the IETF with focus on DTN promises to extend today's Internet boundaries to embrace disruptive communications such as those seen in space networks. Nevertheless, several challenges need to be overcome before operative DTNs can be deployed in orbit. We analyze the state of the art of effective design, planning, and implementation of the forthcoming network communications opportunities (contacts). To this end, different modeling techniques, system constraints, selection criteria, and methods are reviewed and compared. Finally, we discuss the increasing complexity of considering routing and traffic information to enrich the planning procedure, yielding the need to implement a contact plan computation element to support space DTN operation.

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