Approximating minimum size weakly-connected dominating sets for clustering mobile ad hoc networks

  • Authors:
  • Yuanzhu Peter Chen;Arthur L. Liestman

  • Affiliations:
  • Simon Fraser University, British Columbia, Canada;Simon Fraser University, British Columbia, Canada

  • Venue:
  • Proceedings of the 3rd ACM international symposium on Mobile ad hoc networking & computing
  • Year:
  • 2002

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Abstract

We present a series of approximation algorithms for finding a smallweakly-connected dominating set (WCDS) in a given graph to be usedin clustering mobile ad hoc networks. The structure of a graph canbe simplified using WCDS's and made more succinct for routing in adhoc networks. The theoretical performance ratio of these algorithmsis O(ln Δ) compared to the minimum size WCDS, whereΔ is the maximum degree of the input graph. The first twoalgorithms are based on the centralized approximation algorithms ofGuha and Khuller cite guha-khuller-1998 for finding small connecteddominating sets (CDS's). The main contribution of this work is acompletely distributed algorithm for finding small WCDS's and theperformance of this algorithm is shown to be very close to that ofthe centralized approach. Comparisons between our work and someprevious work (CDS-based) are also given in terms of the size ofresultant dominating sets and graph connectivity degradation.