Li, James C. F. and Dey, Subhrakanti (2006) Lifetime Optimization for Wireless Sensor Networks with Outage Probability Constraints. In: 12th European Wireless Conference 2006 - Enabling Technologies for Wireless Multimedia Communications. IEEE. ISBN 9783800729616

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Abstract

Due to the limited energy resources in a wireless sensor network (WSN), lifetime of a WSN is a key parameter. In this paper, we address a lifetime optimization problem of a wireless TDMA/CDMA sensor network for joint transmit power and rate allocations in a time-varying fast Rayleigh fading environment. The effect of fast fading is captured by including rate outage and link outage constraints on each link and a given time-slot. A resulting nonconvex problem is then reduced to an approximate convex optimization problem using an appropriate functional approximation and variable substitutions. This centralized problem is then solved by standard barrier-method based optimization algorithms. A partially distributed algorithm is also provided to illustrate how most of the computations can be done locally at each node in a decentralized manner. The novelty of the paper lies in considering fast fading channels via outage probability constraints for the first time in lifetime maximization problems and obtaining a better convex approximation than previously used approximations in the literature. Simulation results illustrate that our centralized algorithm results in optimal power and rate allocations that result in a substantially extended lifetime of the WSN compared to previously published algorithms. The convergence of the partially distributed algorithms to the optimal power and rate solutions is also illustrated.

Item Type:	Book Section
Additional Information:	Cite as: J. C. F. Li and S. Dey, "Lifetime Optimization for Wireless Sensor Networks with Outage Probability Constraints," 12th European Wireless Conference 2006 - Enabling Technologies for Wireless Multimedia Communications, 2006, pp. 1-7.
Keywords:	Multiaccess; communication; lifetime; optimization; wireless sensor networks; outage; probability constraints;
Academic Unit:	Faculty of Science and Engineering > Research Institutes > Hamilton Institute
Item ID:	14459
Depositing User:	Subhrakanti Dey
Date Deposited:	25 May 2021 13:49
Publisher:	IEEE
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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