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International Journal of Sensors, Wireless Communications and Control

Author(s): Vidya S. Bennur, Ashok V. Sutagundar and Lokesh B. Bhajantri*

DOI: 10.2174/2210327912666220405154504

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Agent-based Localization using Mobile Sink in Wireless Sensor Networks

Page: [387 - 401] Pages: 15

  • * (Excluding Mailing and Handling)

Abstract

Aims: This paper presents agent-based localization using the mobile sink in wireless sensor networks. This proposed scheme is less expensive than GPS. It has a longer lifetime and is more energy-efficient. The mobile sink has a large and easily replenishable energy reserve and is movable within the sensor network's deployment area.

Objective: In this work, a mobile sink is proposed that traverses inside the network's boundary and gathers information at a low energy cost.

Methods: The use of a mobile sink in localization introduces a new way to reduce energy consumption in WSNs. The location of a mobile sink beacon signal is known to all the sensor nodes and is also communicated periodically to all the sensor nodes. The distance measurements of the three beacon signals broadcasted by the mobile sink moving in a predetermined path and time slot are considered in this scheme, which uses the trilateration method to compute the position of the node. For isolated nodes, location estimation is performed for non-GPS equipped nodes to derive from the network their locations by using the reference node beacon signals and performing multilateration. For nodes that receive only one beacon signal from the sink, position estimation is performed by considering the reference node beacon signal by iterative multilateration technique.

Results: In this scheme, reference nodes are those nodes that are localized by the sink, and no GPS is included. The proposed algorithm is simulated using C language, and some of the performance parameters used for the evaluation of the scheme are localization time, localization error, data gathering time, and communication overhead.

Conclusion: The proposed work is compared to the centralized algorithm and the proposed work has been found to outperform the existing networks.

Keywords: Localization, agent technology, mobile sink node, trilateration, multilateration, reference node, isolated node.

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