Relay node placement in two-tiered wireless sensor networks with base stations

  • Authors:
  • Guangting Chen;Suhui Cui

  • Affiliations:
  • The Institute of Operational Research and Cybernetics, Hangzhou Dianzi University, Hangzhou, P.R. China 310018;The Institute of Operational Research and Cybernetics, Hangzhou Dianzi University, Hangzhou, P.R. China 310018

  • Venue:
  • Journal of Combinatorial Optimization
  • Year:
  • 2013

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Abstract

This paper addresses the relay node placement problem in two-tiered wireless sensor networks with base stations, which aims to deploy a minimum number of relay nodes to achieve certain coverage and connectivity requirement. Under the assumption that the communication range of the sensor nodes is no more than that of the relay node, we present a polynomial time (5+∈)-approximation algorithm for the 1-coverage 1-connected problem. Furthermore, we consider the fault tolerant problem in the network, we present a polynomial time (20+∈)-approximation algorithm for the 2-coverage 2-connected problem, where ∈ is any given positive constant. For the k-coverage 2-connected situation, we present a polynomial time (15k驴10+∈)-approximation algorithm.