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  • Research Article
  • Open Access

Efficient MAC Protocols for Wireless Sensor Networks Endowed with Directive Antennas: A Cross-Layer Solution

  • 1Email author,
  • 1,
  • 1,
  • 1,
  • 1,
  • 1,
  • 1 and
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EURASIP Journal on Wireless Communications and Networking20072007:037910

  • Received: 21 October 2006
  • Accepted: 11 May 2007
  • Published:


This paper deals with a novel MAC layer protocol, namely, directive synchronous transmission asynchronous reception (D-STAR) able to space-time synchronize a wireless sensor network (WSN). To this end, D-STAR integrates directional antennas within the communications framework, while taking into account both sleep/active states, according to a cross-layer design. After characterizing the D-STAR protocol in terms of functional characteristics, the related performance is presented, in terms of network lifetime gain, setup latency, and collision probability. It has shown a remarkable gain in terms of energy consumption reduction with respect to the basic approach endowed with omnidirectional antennas, without increasing the signaling overhead nor affecting the setup latency.


  • Wireless Sensor Network
  • Network Lifetime
  • Energy Consumption Reduction
  • Collision Probability
  • Directional Antenna


Authors’ Affiliations

Department of Electronics and Telecommunications, University of Florence, Via di S. Marta 3, Firenze, 50139, Italy


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© Gianfranco Manes et al. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.