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The Research on Localization Technology of Wireless Sensor Network

Author: JiaHongDong
Tutor: WangDianHong
School: China University of Geosciences
Course: Information and Communication Engineering
Keywords: Wireless sensor networks Node Localization RSSI DV-Distance Quadratic weighted
CLC: TP212.9
Type: Master's thesis
Year: 2011
Downloads: 100
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Abstract


Wireless sensor network (Wireless Sensor Networks, WSN) is a set of multi-point data acquisition, wireless transmission and information processing in the new integrated wireless communication network system. Wireless sensor networks as an emerging technology for the 21st century, has caused great concern. With the rapid development of the technology, an extremely wide range of applications in all aspects of daily life, environmental monitoring, industrial production and national defense construction. The positioning is the basis of most of the wireless sensor network applications. For most applications, it does not know the sensor node position and perception data information does not make sense, and wireless sensor network routing mechanism, network management, target tracking and topology control are dependent on the location information of the sensor nodes in the network . Positioning technology as one of the key technologies of wireless sensor networks, wireless sensor network positioning technology has great significance. This paper focuses on the wireless sensor network positioning technology for in-depth analysis of research. The main content of this study include: analysis of the history of the development of the wireless sensor networks, the overall situation, the status and development of wireless sensor network architecture and features as well as network positioning technology. Analysis of the characteristics of the wireless sensor network positioning technology, requirements, and evaluation, as well as basic ranging positioning method, and finally, the analysis of several typical wireless sensor network node localization algorithm. RSSI ranging model experiments to understand the model given parameters and several environmental factors on the signal propagation characteristics for RSSI signal the easy additional noise signal, the the RSSI signal selection when determining the model parameters optimization method and node hardware test. DV-distance algorithm analysis, considering the small size of the actual situation of node hardware and absorb the advantages of the DV-hop algorithm APS series algorithm. An improved DV-distance algorithm; simulation tests to verify its validity. Combined with the characteristics of the weighted centroid algorithm and DV-distance algorithm, proposed a TWCD-HL hybrid positioning algorithms, the algorithm is weighted twice in the DV-distance positioning calculation process to improve positioning accuracy and simulation environment under simulated test the algorithm. RSSI model improvements, as well as the design of the two algorithms, ranging, positioning accuracy is improved to a certain extent and having a certain degree of practicality in certain application environments.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Sensor applications
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