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    A cross-layer framework for optimal delay-margin, network lifetime and utility tradeoff in wireless visual sensor networks


    Tahir, Muhammad and Farrell, Ronan (2013) A cross-layer framework for optimal delay-margin, network lifetime and utility tradeoff in wireless visual sensor networks. Ad Hoc Networks, 11 (2). pp. 701-711. ISSN 1570-8705

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    Abstract

    For wireless multimedia sensor networks a distributed cross-layer framework is proposed, which not only achieves an optimal tradeoff between network lifetime and its utility but also provides end-to-end delay-margin. The delay-margin, defined as the gap between maximum end-to-end delay threshold and the actual end-to-end delay incurred by the network, is exploited by the application layer to achieve any desired level of delay quality-of-service. For optimal performance tradeoff an appropriate objective function for delay-margin is required, which is obtained by employing sensitivity analysis. Sensitivity analysis is performed by incorporating delay-margin in the end-to-end delay constraints while penalizing its price in the objective function. For distributed realization of proposed cross-layer framework, the optimal tradeoff problem is decomposed into network lifetime, utility and delay-margin subproblems coupled through dual variables. The numerical results for performance evaluation show that compromising network utility does not guarantee both lifetime and delay-margin improvement, simultaneously, for the set of operating points. Performance evaluation results also reveal that the fairness among different delay-margins, corresponding to different source–destination node pairs, can be improved by relaxing the end-to-end delay threshold.

    Item Type: Article
    Additional Information: Research presented in this paper was in part funded by a Strategic Research Cluster Grant (07/SRC/I1168) by Science Foundation Ireland under the National Development Plan. On Pakistan side it is funded by Higher Education Commission (under Pakistan–US Science and Technology Cooperation Program) and Directorate of Research University of Engineering and Technology Lahore. The authors gratefully acknowledge this support.
    Keywords: Sensitivity analysis; Delay-margin; Network lifetime; Distributed realization;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 9580
    Identification Number: https://doi.org/10.1016/j.adhoc.2011.09.011
    Depositing User: Dr. Ronan Farrell
    Date Deposited: 21 Jun 2018 14:40
    Journal or Publication Title: Ad Hoc Networks
    Publisher: Elsevier
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI), Higher Education Commission (Pakistan)
    URI:

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