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ThinkMind // ICWMC 2014, The Tenth International Conference on Wireless and Mobile Communications // View article icwmc_2014_5_20_20117


On-Demand Data Collection in Sparse Underwater Acoustic Sensor Networks Using Mobile Elements

Authors:
Jalaja M Janardanan Kartha
Lillykutty Jacob

Keywords: Underwater Sensor Networks; Delay Tolerant Network; Mobile Sink; Priority Polling; Energy Efficiency; Fairness.

Abstract:
Underwater Wireless Sensor Networks (UWSNs) is a group of sensors and underwater vehicles, networked via acoustic links, that perform collaborative tasks and enable a wide range of aquatic applications. Due to hostile environment, resource constraints and peculiarities of the underlying physical layer technology, providing energy-efficient data collection in a sparse UWSN is a challenging problem. We consider mobility-assisted routing technique for enabling connectivity and improving the energy efficiency of sparse UWSN, considering it as a Delay/Disruption Tolerant Network (DTN) or Intermittently Connected Network (ICN). We use analytical models to investigate the performance of the data collection scheme. Based on the result that the DTN scheme improves energy efficiency and Packet Delivery Ratio (PDR) at the cost of increased message latency, we investigate techniques to improve the delay performance. The effects of using multiple mobile elements for data collection and priority-polling based on traffic class and data generation rate are investigated. The analytical results are validated through extensive simulations. The results show that our model for data collection in sparse UWSNs can effectively capture the underwater acoustic network conditions. Also, the improved DTN framework shows superior performance in terms of energy efficiency and network connectivity over ad hoc multihop network, and in terms of message latency and fairness over simple polling-based DTN framework.

Pages: 105 to 111

Copyright: Copyright (c) IARIA, 2014

Publication date: June 22, 2014

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-347-6

Location: Seville, Spain

Dates: from June 22, 2014 to June 26, 2014

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