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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 235374, 8 pages
http://dx.doi.org/10.1155/2012/235374
Research Article

Interference-Aware Fault-Tolerant Energy Spanner in Wireless Ad Hoc Networks

College of Information Science and Engineering, Hunan University, Changsha 410082, China

Received 20 July 2012; Accepted 21 November 2012

Academic Editor: Ruchuan Wang

Copyright © 2012 Dong Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Power assignment in wireless ad hoc networks is an important issue of topology control which assigns power for each wireless node so that the induced communication graph satisfies some desired properties such as the connectivity and the energy spanner. In this paper, we study the problem of power assignment in order that its induced communication graph meets the following properties: (1) it is an energy-t-spanner which is energy efficient; (2) it is k-fault resistant which can withstand up to node failures where k 1; (3) the interference is minimal. We propose algorithms to address this problem. Both the theoretic analysis and the simulations in the paper prove that our algorithms can induce a k-fault resistant energy spanner and furthermore the interference is minimized. To the best of our knowledge, this is the first paper to study the power assignment problem simultaneously considering spanner properties, the fault tolerance, and the interference reduction.