Energy efficiency in wireless sensor networks using sleep mode TDMA scheduling

  • Authors:

  • Nikolaos A. Pantazis;Dimitrios J. Vergados;Dimitrios D. Vergados;Christos Douligeris

  • Affiliations:

  • Department of Information and Communication Systems Engineering, University of the Aegean, Karlovassi, Samos GR-832 00, Greece and Department of Electronics, Technological Educational Institute (T ...;School of Electrical and Computer Engineering, National Technical University of Athens, Heroon Polytechniou 9, Zographou, Athens GR-157 73, Greece;Department of Information and Communication Systems Engineering, University of the Aegean, Karlovassi, Samos GR-832 00, Greece and Department of Informatics, University of Piraeus, Karaoli & Dimit ...;Department of Informatics, University of Piraeus, Karaoli & Dimitriou St. 80, GR-185 34 Piraeus, Greece

  • Venue:
  • Ad Hoc Networks
  • Year:
  • 2009

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Abstract

Power saving is a very critical issue in energy-constrained wireless sensor networks. Many schemes can be found in the literature, which have significant contributions in energy conservation. However, these schemes do not concentrate on reducing the end-to-end packet delay while at the same time retaining the energy-saving capability. Since a long delay can be harmful for either large or small wireless sensor networks, this paper proposes a TDMA-based scheduling scheme that balances energy-saving and end-to-end delay. This balance is achieved by an appropriate scheduling of the wakeup intervals, to allow data packets to be delayed by only one sleep interval for the end-to-end transmission from the sensors to the gateway. The proposed scheme achieves the reduction of the end-to-end delay caused by the sleep mode operation while at the same time it maximizes the energy savings.