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Robust and Distributed Range-Free Localization Using Anchor Nodes with Varying Communication Range for Three Dimensional Wireless Sensor Networks

Robust and Distributed Range-Free Localization Using Anchor Nodes with Varying Communication Range for Three Dimensional Wireless Sensor Networks,10.1

Robust and Distributed Range-Free Localization Using Anchor Nodes with Varying Communication Range for Three Dimensional Wireless Sensor Networks   (Citations: 1)
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Localization of the nodes in a sensor network is a premier activity which influences the performance of the network. The data collected by a sensor node may become useless if the location of that node is not known. Sensor networks are mostly deployed in areas where manual positioning of the sensor nodes is not feasible, and the topology and size of the network also changes frequently. Therefore, the localization schemes developed for these kinds of network need to be self-configurable and adaptive to the changes. This paper presents a localization scheme for three dimensional wireless sensor networks that not only helps sensor nodes to self-localize, but, it is also able to verify the estimated location and re-estimate it, if needed. The sensor nodes estimate their positions based on the position information of the GPS enabled anchor nodes. Simulation results show that the proposed method gains heavily in terms of the accuracy of the estimated positions.
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    • ...Therefore, several localization techniques [9,10,11,14] developed for terrestrial networks can not be directly applied to UWSN...
    • ...Further, the benefits of using anchor nodes with varying communication range have been advocated and proved in [10]...
    • ...This paper proposes an accurate and selfcorrecting localization algorithm for UWSN using anchor nodes with variable communication range based on the approach proposed in [10]...
    • ...In [10] Mishra and Gore proposed a robust localization approach for 3D WSN with error correction...
    • ...But, as GPS does not work underwater, we used the approach for position calculation and error correction of [10] in this work, and modified the mobility model to adapt to 3D UWSN...
    • ...The details of the position calculations are adopted from [10]...
    • ...The error correction can be achieved by using any of the three different approaches proposed in [10]...
    • ...If this distance is equal to the transmission range of the anchor node, then the estimated location is assumed to be correct, otherwise the error correction is done using either of the methods mentioned in [10]...
    • ...The results using anchor nodes of variable communication range have been compared for all the three cases implementing the three error correction methods mentioned in [10], respectively...

    Manas Kumar Mishraet al. An Accurate and Self-correcting Localization Algorithm for UWSN Using ...

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