Energy efficient target-oriented scheduling in directional sensor networks

Yanli Cai, Wei Lou, Minglu Li, Xiang Yang Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

127 Citations (Scopus)


Unlike convectional omnidirectional sensors that always have an omniangle of sensing range, directional sensors may have a limited angle of sensing range due to the technical constraints or cost considerations. A directional sensor network consists of a number of directional sensors, which can switch to several directions to extend their sensing ability to cover all the targets in a given area. Power conservation is still an important issue in such directional sensor networks. In this paper, we address the multiple directional cover sets (MDCS) problem of organizing the directions of sensors into a group of nondisjoint cover sets to extend the network lifetime. One cover set in which the directions cover all the targets is activated at one time. We prove the MDCS to be NP-complete and propose several algorithms for the MDCS. Simulation results are presented to demonstrate the performance of these algorithms.
Original languageEnglish
Pages (from-to)1259-1274
Number of pages16
JournalIEEE Transactions on Computers
Issue number9
Publication statusPublished - 25 Aug 2009


  • Coverage
  • Energy conservation
  • Mixed integer programming
  • Scheduling
  • Sensor networks

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Hardware and Architecture
  • Computational Theory and Mathematics


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