On the construction of 2-connected virtual backbone in wireless networks

  • Authors:

  • Feng Wang;My T. Thai;Ding-Zhu Du

  • Affiliations:

  • Mathematical and Natural Sciences Division, Arizona State University, Phoenix, AZ;Computer and Information Science and Engineering Department, University of Florida, Gainesville, FL;Department of Computer Science and Engineering, University of Texas at Dallas, Richardson, TX

  • Venue:
  • IEEE Transactions on Wireless Communications
  • Year:
  • 2009

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Abstract

Virtual backbone has been proposed as the routing infrastructure to alleviate the broadcasting storm problem in ad hoc networks. Since the nodes in the virtual backbone need to carry other node's traffic, and node and link failure are inherent in wireless networks, it is desirable that the virtual backbone is fault tolerant. In this paper, we propose a new algorithm called Connecting Dominating Set Augmentation (CDSA) to construct a 2-connected virtual backbone which can resist the failure of one wireless node. We show that CDSA has guaranteed quality by proving that the size of the CDSA constructed 2- connected backbone is within a constant factor of the optimal 2- connected virtual backbone size. Through extensive simulations, we demonstrate that in practice, CDSA can build a 2-connected virtual backbone with only small overhead.