Publications Journal article · Delay-tolerant networks · 2017

An evolutionary approach towards contact plan design for disruption-tolerant satellite networks

Juan A. Fraire, Pablo G. Madoery, Jorge M. Finochietto, and Guillermo Leguizamón

Elsevier Applied Soft Computing, vol. 52, pp. 446–456, 2017

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Abstract

Delay and disruption tolerant networks (DTNs) are becoming an appealing solution for satellite networks where nodes can temporarily store and carry in-transit data until a link with a suitable next-hop becomes available. Since satellite trajectories and orientation can be predicted, on-board routing schemes can base these forwarding decisions on a contact plan comprising all forthcoming communication opportunities. In general, contact plans are previously calculated on ground where their design can be optimized to consider not only available spacecraft resources but also the expected traffic which is largely foreseeable in space applications. Despite optimal contact plan design procedures exist, their computation complexity might result prohibitive even for medium-sized satellite networks. In this work, we propose an evolutionary algorithm to provide sub-optimal yet efficient and implementable contact plans in bounded time. In particular, we depict specific strategies such as encoding and repairing techniques to later evaluate the algorithm performance in a typical scenario demonstrating its usefulness for planning future DTN-based satellite networks.

Cite

DOI 10.1016/j.asoc.2016.10.023

BibTeX

@article{DBLP:journals/asc/FraireMFL17,
  author  = {Juan A. Fraire and Pablo G. Madoery and Jorge M. Finochietto and Guillermo Leguizam{\'{o}}n},
  title   = {An evolutionary approach towards contact plan design for disruption-tolerant satellite networks},
  journal = {Elsevier Applied Soft Computing},
  volume  = {52},
  pages   = {446--456},
  year    = {2017},
  doi     = {10.1016/j.asoc.2016.10.023}
}

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Abstract
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Publisher
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Abstract
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Design challenges in contact plans for disruption-tolerant satellite networks Juan A. Fraire and Jorge M. Finochietto IEEE Communications Magazine, 2015
Abstract
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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