CDS-based virtual backbone construction with guaranteed routing cost in wireless sensor networks

Hongwei Du, Weili Wu, Qiang Ye, Deying Li, Wonjun Lee, Xuepeng Xu

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Inspired by the backbone concept in wired networks, virtual backbone is expected to bring substantial benefits to routing in wireless sensor networks (WSNs). Virtual backbone construction based on Connected Dominating Set (CDS) is a competitive approach among the existing methods used to establish virtual backbone in WSNs. Traditionally, CDS size was the only factor considered in the CDS-based approach. The motivation was that smaller CDS leads to simplified network maintenance. However, routing cost in terms of routing path length is also an important factor for virtual backbone construction. In our research, both of these two factors are taken into account. Specifically, we attempt to devise a polynomial-time constant-approximation algorithm that leads to a CDS with bounded CDS size and guaranteed routing cost. We prove that, under general graph model, there is no polynomial-time constant-approximation algorithm unless (P) (=NP). Under Unit Disk Graph (UDG) model, we propose an innovative polynomial-time constant-approximation algorithm, GOC-MCDS-C, that produces a CDS (D) whose size |(D)| is within a constant factor from that of the minimum CDS. In addition, for each node pair (u) and (v), there exists a routing path with all intermediate nodes in (D) and path length at most (7 · d(u,v)), where (d(u,v)) is the length of the shortest path between (u) and (v). Our theoretical analysis and simulation results show that the distributed version of the proposed algorithm, GOC-MCDS-D, outperforms the existing approaches.

Original languageEnglish
Article number6216366
Pages (from-to)652-661
Number of pages10
JournalIEEE Transactions on Parallel and Distributed Systems
Volume24
Issue number4
DOIs
Publication statusPublished - 2013

Keywords

  • Wireless sensor networks
  • connected dominating set
  • routing cost
  • virtual backbone

ASJC Scopus subject areas

  • Signal Processing
  • Hardware and Architecture
  • Computational Theory and Mathematics

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