Prolonging Network Life Time and Running Multi-Sequence Applications in Wireless Sensor Networks

Amjed Abdul Majeed

    Research output: ThesisDoctoral Thesis

    67 Downloads (Pure)

    Abstract

    Traditionally, wireless sensor networks’ deployment is meant for a single application, which limits the commercial deployment of a sensor network. In many scenarios, however, it has become very desirable to use a sensor network to run multiple applications where the demand for applications
    that can harness the capabilities of a sensor-rich environment increases. With advancement in sensor technology, the size and cost of a sensor node have been reduced significantly, allowing a large number of these resource-constrained nodes be deployed to form a dense network. This thesis proposes a network design model that is based on utilizing a dense wireless sensor network
    to achieve running multiple applications in a predefined sequence for scenarios requiring multiple applications. We also claim that the design model proposed when applied for a single running application would result in an energy consumption improvement that would result in prolonging network life time.

    The proposed network design model fundamentally works on dividing the region of interest into multiple sets called dynamic switching sets (DSS), each of which has a number of sensor node subscribers allocated by the base station (BS). These DSS are then re-organized by the base station into a number of sets equivalent to the number of applications intended to run in a pre-defined
    sequence over the entire network life. The research model was implemented and tested to run three different applications on the network such that there were three different sets of DSS. Each DSS set would run one application in a predefined sequence while the remaining sets transit to energy saving sleep mode. Hence only one set would be active running one application while
    maintaining coverage and connectivity until new instructions are disseminated by the base station for the next in line application sequence (second application) to go active and running. Similarly, when the third set comes on active running the third application, the first two sets would transit to sleep mode after completing their assigned roles in running the first two applications. The
    experimental results show that the proposed design model also serves to improve energy consumption significantly and prolong network life time when implemented for single applications running over the entire network life time.

    The proposed research focuses on two dominating factors pertaining to the cost of a wireless sensor network (WSN). The first is the return of investment, that is the ‘usefulness’ of a WSN when deployed and hence the importance for the network to perform multi-application tasks over its intended lifetime. The second is the improvement of energy consumption when the model is applied for a single running application of the unattended network resulting in prolonging network life time. Both factors constitute a WSN that features modular and flexible infrastructure.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • Charles Sturt University
    Supervisors/Advisors
    • Zia, Tanveer, Principal Supervisor
    Award date01 Apr 2014
    Place of PublicationAustralia
    Publisher
    Publication statusPublished - 2014

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