Neighbor Constraint Assisted Distributed Localization for Wireless Sensor Networks

Localization is one of the most significant technologies in wireless sensor networks (WSNs) since it plays a critical role in many applications. The main idea in most localization methods is to estimate the sensor-anchor distances that are used by sensors to locate themselves. However, the distance...

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Bibliographic Details
Published in:Mathematical problems in engineering 2014-01, Vol.2014 (2014), p.1-11
Main Authors: Zhang, Baihai, Chai, Senchun, Cui, Lingguo, Wen, Longfei
Format: Article
Language:English
Subjects:
Algorithms
Engineering
Geometric constraints
Localization
Mathematical analysis
Methods
Optimization
Position (location)
Remote sensors
Sensors
Wireless networks
Wireless sensor networks
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Summary:Localization is one of the most significant technologies in wireless sensor networks (WSNs) since it plays a critical role in many applications. The main idea in most localization methods is to estimate the sensor-anchor distances that are used by sensors to locate themselves. However, the distance information is always imprecise due to the measurement or estimation errors. In this work, a novel algorithm called neighbor constraint assisted distributed localization (NCA-DL) is proposed, which introduces the application of geometric constraints to these distances within the algorithm. For example, in the case presented here, the assistance provided by a neighbor will consist in formulating a linear equality constraint. These constraints can be further used to formulate optimization problems for distance estimation. Then through some optimization methods, the imprecise distances can be refined and the localization precision is improved.
ISSN:1024-123X
1563-5147
DOI:10.1155/2014/143938