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Reference node placement and selection algorithm based on trilateration for indoor sensor networks

WIRELESS COMMUNICATIONS & MOBILE COMPUTING 2009年第8期9卷 1017-1027页

作者： Han, Guangjie Choi, Deokjai Lim, Wontaek Hohai Univ Dept Informat & Commun Engn Changzhou 213022 Peoples R China Chonnam Natl Univ Dept Comp Sci Kwangju 500757 South Korea

The key problem of location service in indoor sensor networks is to quickly and precisely acquire the position information of mobile nodes. Due to resource limitation of the sensor nodes, some of the traditional positioning, algorithms, such as two-phase positioning (TPP) algorithm, are too complicated to be implemented and they cannot provide the real-time localization of the mobile node. We analyze the localization error, which is produced when one tries to estimate the mobile node using trilateration method in the localization process. We draw the conclusion that the localization error is the least when three reference nodes form all equilateral triangle. Therefore, we improve the TPP algorithm and propose reference node selection algorithm based on trilateration (rnst), which call provide real-time localization service for the mobile nodes. Our proposed algorithm is verified by the simulation experiment. Based on the analysis of the acquired data and comparison with that of the TPP algorithm, we conclude that our algorithm call meet real-time localization requirement of the mobile nodes ill an indoor environment, and make the localization error less than that of the traditional algorithm: therefore our proposed algorithm call effectively solve the real-time localization problem of the mobile nodes in indoor sensor networks. Copyright (C) 2008 John Wiley & Sons, Ltd.

关键词： indoor sensor networks reference node rnst algorithm trilateration location localization error

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Reference node selection algorithm and localization error analysis for indoor sensor networks

Reference node selection algorithm and localization error an...

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3rd IEEE/IFIP International Conference in Central Asia on Internet

作者： Han, Guangjie Choi, Deokjai Van Nyuyen, Tam Chonnam Natl Univ Dept Comp Sci Kwangju 500757 South Korea

ISBN: (纸本)9781424410064

In indoor environment, one of the major challenges for researchers is to localize the sensor nodes with relatively high localization precision. Many traditional positioning algorithms dealt with the node localization issues, such as Two-Phase Positioning (FPP) algorithm, without taking into account the "reference node" parameter, however which also strongly affects the quality of spatial localization. We analyze the localization error and draw the conclusion that the localization error is the least when three reference nodes form an equilateral triangle. Therefore, we propose Reference Node Selection algorithm based on Trilateration (rnst). The simulation results show that our algorithm can meet real-time localization requirement of the mobile nodes in indoor environment, and make the localization error less than that of the traditional algorithm.

关键词： Wireless Sensor Networks rnst algorithm trilateration location localization error real-time localization

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