Publications Conference paper · Delay-tolerant networks · 2014

Leveraging routing performance and congestion avoidance in predictable delay tolerant networks

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

IEEE International Conference on Wireless for Space and Extreme Environments (WiSEE), pp. 1–7, 2014

Abstract

Delay or Disruption Tolerant Network (DTN) architecture has become a promising solution for challenged environments where communications cannot be assumed persistent. In particular, if node dynamics can be predicted like in space-borne networks, routing schemes such as Merugu's Floyd Warshsall (MFW) and Contact Graph Routing (CGR) can take advantage of the a priori knowledge of the DTN topology. In this work we compare and leverage these popular schemes and propose Cache-CGR: a computationally efficient version of CGR that reduce processing requirements while preserving its features such as local congestion avoidance. We demonstrate the performance gain of C-CGR both by means of simulation and an on-board computer test-bench with Interplanetary Overlay Network (ION) DTN implementation. Finally, we discuss CGR open issues and lay the foundations for future research on DTN global congestion avoidance mechanisms.

Cite

DOI 10.1109/wisee.2014.6973079

BibTeX

@inproceedings{DBLP:conf/wisee/FraireMF14,
  author    = {Juan A. Fraire and Pablo G. Madoery and Jorge M. Finochietto},
  title     = {Leveraging routing performance and congestion avoidance in predictable delay tolerant networks},
  booktitle = {IEEE International Conference on Wireless for Space and Extreme Environments (WiSEE)},
  pages     = {1--7},
  publisher = {{IEEE}},
  year      = {2014},
  doi       = {10.1109/wisee.2014.6973079}
}

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CONICET Digital Publisher
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Abstract
Existing Internet protocols assume persistent end-to-end connectivity, which cannot be guaranteed in disruptive and high-latency space environments. To operate over these challenging networks, a store-carry-and-forward communication architecture called Delay/Disruption Tolerant Networking (DTN) has been proposed. This work provides the first examination of the performance and robustness of Contact Graph Routing (CGR) algorithm, the state-of-the-art routing scheme for space-based DTNs. To this end, after a thorough description of CGR, two appealing satellite constellations are proposed and evaluated by means of simulations. Indeed, the DtnSim simulator is introduced as another relevant contribution of this work. Results enabled the authors to identify existing CGR weaknesses and enhancement opportunities.

Publisher

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