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Sensors 2016, 16(10), 1662; doi:10.3390/s16101662

Achieving Passive Localization with Traffic Light Schedules in Urban Road Sensor Networks

School of Computer Science and Technology, China University of Mining and Technology, Xuzhou 221116, China
These authors contributed equally to this work.
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Academic Editors: Lyudmila Mihaylova, Byung-Gyu Kim and Debi Prosad Dogra
Received: 30 July 2016 / Revised: 18 September 2016 / Accepted: 27 September 2016 / Published: 10 October 2016
(This article belongs to the Special Issue Scalable Localization in Wireless Sensor Networks)
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Abstract

Localization is crucial for the monitoring applications of cities, such as road monitoring, environment surveillance, vehicle tracking, etc. In urban road sensor networks, sensors are often sparely deployed due to the hardware cost. Under this sparse deployment, sensors cannot communicate with each other via ranging hardware or one-hop connectivity, rendering the existing localization solutions ineffective. To address this issue, this paper proposes a novel Traffic Lights Schedule-based localization algorithm (TLS), which is built on the fact that vehicles move through the intersection with a known traffic light schedule. We can first obtain the law by binary vehicle detection time stamps and describe the law as a matrix, called a detection matrix. At the same time, we can also use the known traffic light information to construct the matrices, which can be formed as a collection called a known matrix collection. The detection matrix is then matched in the known matrix collection for identifying where sensors are located on urban roads. We evaluate our algorithm by extensive simulation. The results show that the localization accuracy of intersection sensors can reach more than 90%. In addition, we compare it with a state-of-the-art algorithm and prove that it has a wider operational region. View Full-Text
Keywords: wireless sensor network; localization; traffic lights; time stamps wireless sensor network; localization; traffic lights; time stamps
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Niu, Q.; Yang, X.; Gao, S.; Chen, P.; Chan, S. Achieving Passive Localization with Traffic Light Schedules in Urban Road Sensor Networks. Sensors 2016, 16, 1662.

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