Node selection for cooperative localization: efficient energy vs. accuracy trade-off

  • Authors:

  • Albert Bel;José López Vicario;Gonzalo Seco-Granados

  • Affiliations:

  • Group of Signal Processing for Communication and Navigation, Telecommunications and Systems Engineering Department, Universitat Autonoma de Barcelona, Bellaterra, Barcelona, Spain;Group of Signal Processing for Communication and Navigation, Telecommunications and Systems Engineering Department, Universitat Autonoma de Barcelona, Bellaterra, Barcelona, Spain;Group of Signal Processing for Communication and Navigation, Telecommunications and Systems Engineering Department, Universitat Autonoma de Barcelona, Bellaterra, Barcelona, Spain

  • Venue:
  • ISWPC'10 Proceedings of the 5th IEEE international conference on Wireless pervasive computing
  • Year:
  • 2010

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Abstract

In this paper, we present a cooperative localization algorithm for wireless sensor networks. We adopt an RSS-based localization algorithm due to its lower complexity with respect to other ranging techniques such as TOA or AOA. Since the energy consumption is a key aspect in sensor networks, we propose a node selection algorithm in order to avoid the use of all the nodes in the network for positioning purposes. Thus, we derive a practical solution tailored to the strict requirements of sensor networks in terms of complexity, size and cost. In particular, nodes in the network select the cooperating nodes by simply comparing their received RSS with a threshold. We present results based on both computer simulations and experimentation with the Crossbow IRIS motes showing that the proposed scheme offers a good trade-off in terms of position accuracy vs. energy consumption.