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    Lifetime Optimization for Wireless Sensor Networks with Outage Probability Constraints


    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:

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