Efficient virtual backbone construction with routing cost constraint in wireless networks using directional antennas

Ling Ding, Weili Wu, James Willson, Hongjie Du, Wonjun Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Directional antennas can divide the transmission range into several sectors. Thus, through switching off sectors in unnecessary directions in wireless networks, we can save bandwidth and energy consumption. In this paper, we will study a directional virtual backbone (VB) in the network where directional antennas are used. When constructing a VB, we will take routing and broadcasting into account since they are two common operations in wireless networks. Hence, we will study a VB with guaranteed routing costs, named α Minimum rOuting Cost Directional VB (α-MOC-DVB). Besides the properties of regular VBs, α-MOC-DVB also has a special constraintfor any pair of nodes, there exists at least one path all intermediate directions on which must belong to α-MOC-DVB and the number of intermediate directions on the path is smaller than α times that on the shortest path. We prove that construction of a minimum α-MOC-DVB is an NP-hard problem in a general directed graph. A heuristic algorithm is proposed and theoretical analysis is also discussed in the paper. Extensive simulations demonstrate that our α-MOC-DVB is much more efficient in the sense of VB size and routing costs compared to other VBs.

Original languageEnglish
Article number6202811
Pages (from-to)1102-1112
Number of pages11
JournalIEEE Transactions on Mobile Computing
Volume11
Issue number7
DOIs
Publication statusPublished - 2012 Jul 1

Keywords

  • connected dominating set
  • Directional antennas
  • general graph
  • NP-hard
  • obstacle
  • routing costs
  • virtual backbone
  • wireless network

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Software

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