1. What contributions have the authors mentioned in the paper "Multiple objects device-free passive tracking using wireless sensor networks" ?
Object tracking is a main application of wireless sensor networks ( WSNs ), and has been studied widely [ 4 ], [ 9 ].. In this work, the authors study multiple objects tracking problem using WSNs, in which they assume no equipment is carried by the object and the tracking procedure is passive.. The authors first show that without carefully design, Received Signal Strength Indicator ( RSSI ) and Link Quality Indicator ( LQI ) are not as effective as claimed for passive detection through their testbed studies.. The authors further propose to use light to track moving objects in WSNs.. To their best knowledge, this is the first work to study multiple objects tracking using light sensors and general light sources.. The authors propose a novel probabilistic tracking protocol to track multiple objects.. The authors further design several efficient methods to compute some attributes of the moving objects ( like heights, moving speeds etc. ).
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2. What have the authors stated for future works in "Multiple objects device-free passive tracking using wireless sensor networks" ?
The authors proposed several algorithms to study the moving patterns of objects efficiently.. Based on showing their main algorithm in single object tracking using light sensors and light sources, the authors further proposed their probabilistic method to track multiple objects at the same time.. The authors found that it is possible to do counting when they can carefully arrange the position of light sources and sensors.. One of their next steps is to improve their approach for counting and then tracking multiple moving objects efficiently using light sensors, further do real testbed experiments.
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