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Advances in Multimedia
Volume 2007 (2007), Article ID 19860, 9 pages
Research Article

Cross-Layer Path Configuration for Energy-Efficient Communication over Wireless Ad Hoc Networks

1Department of Electrical and Computer Engineering, University of Victoria, BC V8W 3P6, Canada
2Department of Computer Science, University of Victoria, BC V8W 3P6, Canada

Received 27 December 2006; Revised 12 April 2007; Accepted 12 April 2007

Academic Editor: Jianwei Huang

Copyright © 2007 Hong-Chuan Yang 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.


We study the energy-efficient configuration of multihop paths with automatic repeat request (ARQ) mechanism in wireless ad hoc networks. We adopt a cross-layer design approach and take both the quality of each radio hop and the battery capacity of each transmitting node into consideration. Under certain constraints on the maximum tolerable transmission delay and the required packet delivery ratio, we solve optimization problems to jointly schedule the transmitting power of each transmitting node and the retransmission limit over each hop. Numerical results demonstrate that the path configuration methods can either significantly reduce the average energy consumption per packet delivery or considerably extend the average lifetime of the multihop route.