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Journal of Sensors
Volume 2016, Article ID 2424101, 16 pages
http://dx.doi.org/10.1155/2016/2424101
Research Article

Performance Analysis of ZigBee Wireless Networks for AAL through Hybrid Ray Launching and Collaborative Filtering

1Electrical and Electronic Engineering Department, Public University of Navarre, 31006 Pamplona, Spain
2Department of Computer Engineering and Mathematics, Rovira i Virgili University, 43007 Catalonia, Spain
3Institute for Smart Cities, Public University of Navarre, 31006 Pamplona, Spain
4School of Engineering and Sciences, Tecnológico de Monterrey, 64849 Monterrey, NL, Mexico

Received 2 September 2015; Accepted 26 January 2016

Academic Editor: Pietro Siciliano

Copyright © 2016 Peio Lopez-Iturri 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

This paper presents a novel hybrid simulation method based on the combination of an in-house developed 3D ray launching algorithm and a collaborative filtering (CF) technique, which will be used to analyze the performance of ZigBee-based wireless sensor networks (WSNs) to enable ambient assisted living (AAL). The combination of Low Definition results obtained by means of a deterministic ray launching method and the application of a CF technique leads to a drastic reduction of the time and computational cost required to obtain accurate simulation results. The paper also reports that this kind of AAL indoor complex scenario with multiple wireless devices needs a thorough and personalized radioplanning analysis as radiopropagation has a strong dependence on the network topology and the specific morphology of the scenario. The wireless channel analysis performed by our hybrid method provides valuable insight into network design phases of complex wireless systems, typical in AAL-oriented environments. Thus, it results in optimizing network deployment, reducing overall interference levels, and increasing the overall system performance in terms of cost reduction, transmission rates, and energy efficiency.