Efficient data aggregation in multi-hop WSNs

  • Authors:
  • XiaoHua Xu;ShiGuang Wang;XuFei Mao;ShaoJie Tang;Ping Xu;Xiang-Yang Li

  • Affiliations:
  • Illinois Institute of Technology;Illinois Institute of Technology;Illinois Institute of Technology;Illinois Institute of Technology;Illinois Institute of Technology;Illinois Institute of Technology

  • Venue:
  • GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
  • Year:
  • 2009

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Abstract

Data aggregation is a primitive communication task in wireless sensor networks (WSNs). In this paper, we study designing data aggregation schedules under the Protocol Interference Model for answering queries. Given a network consisting of a set of nodes V distributed in a two-dimensional plane, we address different kinds of queries in this paper. First and foremost, we consider a single one-off query which requires a subset of source nodes V′ ⊆ V to send data to a distinguished sink node, we propose a delay-efficient algorithm that produces a collision-free schedule and theoretically prove that the delay achieved by our algorithm is nearly a small constant factor of the optimum. We further extend our discussion to the multiple one-off queries case and periodic query case and propose our data aggregation scheduling algorithms respectively with theoretical performance analysis.