Table of Contents
International Journal of Vehicular Technology
Volume 2009 (2009), Article ID 958056, 13 pages
http://dx.doi.org/10.1155/2009/958056
Research Article

Evaluation of Physical Carrier Sense Based Backbone Maintenance in Mobile Ad Hoc Networks

1Department of Electrical Engineering, Arizona State University, Goldwater Center, MC 5706, Tempe, AZ 85287-5706, USA
2Department of Computer Science and Engineering, Arizona State University, Box 878809, Tempe, AZ 85287-8809, USA

Received 4 December 2008; Accepted 15 April 2009

Academic Editor: Kui Wu

Copyright © 2009 Sapna Deval 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

Physical carrier sensing has to date mainly been exploited for improving medium access control in wireless networks. Recently, a parallel algorithm striving to extensively exploit physical carrier sensing for constructing and maintaining a connected dominating set (CDS), which is also known as spanner, backbone, or overlay network in wireless ad hoc networks with interference ranges larger than transmission ranges has been proposed. Existing evaluations of this algorithm are limited to theoretical asymptotic bounds and simulations of static networks. In this paper, we evaluate the physical carrier sensing-based CDS maintenance for mobile ad hoc networks through discrete event simulations. For a wide range of node speeds and node densities, we evaluate the CDS characteristics and message exchanges required for maintaining the CDS. We find that the algorithm maintains a stable leader set dominating all nodes in the network for a wide range of mobility levels but struggles to maintain connectivity at high mobility levels. We also quantify the portions of the control messages for CDS maintenance that are exchanged through physical carrier sensing. We find that the parallel algorithm manages to greatly reduce the reliance on intact message receptions.