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International Journal of Distributed Sensor Networks
Volume 2011 (2011), Article ID 717208, 9 pages
http://dx.doi.org/10.1155/2011/717208
Research Article

Distributed Algorithm for Traffic Data Collection and Data Quality Analysis Based on Wireless Sensor Networks

Department of Computer Science and Technology, Dalian University of Technology, Dalian Liaoning 116023, China

Received 14 February 2011; Accepted 10 July 2011

Copyright © 2011 Nan Ding et al. 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.

Abstract

The growing need of the real-time traffic data has spurred the deployment of large-scale dedicated monitoring infrastructure systems, which mainly consist of the use of inductive loop detectors. However, the loop sensor data is prone to be noised or even missed under harsh environment. The state-of-the-art wireless sensor networks provide an appealing and low-cost alternative to inductive loops for traffic surveillance. Focusing on the urban traffic data collection, this paper proposes a distributed algorithm to collect the traffic data based on sensor networks and improve the reliability of data by quality analysis. Considering the certain correlated characteristics, this algorithm firstly processes the data samples with an aggregation model based on the mean filter, and then, the data quality is analyzed, and partial bad data are repaired by the cusp catastrophe theory. The performance of this algorithm is analyzed with a number of simulations based on data set obtain in urban roadway, and the comparative results show that this algorithm could obtain the better performance.