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Evaluation of Spatio-Temporal Queries in Sensor Networks

Autor Markus Bestehorn
en Limba Engleză Paperback – 29 iun 2015
Declarative query interfaces for Sensor Networks (SN)have become a commodity. These interfaces allowaccess to SN deployed for collecting data usingrelational queries. However, SN are not confined todata collection, but may track object movement, e.g.,wildlife observation or traffic monitoring. Whilerelational approaches are well suited for datacollection, research on Moving Object Databases (MOD)has shown that relational operators are unsuitable toexpress queries on object movement, i.e.,spatio-temporal semantics. The properties of SNprevent a straightforward application of MOD, e.g.,node failures, limited accuracy etc. Furthermore, MODmodel entities like regions as point sets whichpresumes very accurate knowledge on thespatial extend of these entities. Such knowledge isunavailable in most SN. Thisdissertation is the first to address spatio-temporalqueries in SN. It defines a complete set ofspatio-temporal operators for SN while taking intoaccount their properties and systematically shows howto derive query results from object detections.Finally, the dissertation presents a distributed,energy-efficient query processor for spatio-temporalqueries in SN.
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Specificații

ISBN-13: 9783838125145
ISBN-10: 3838125142
Pagini: 240
Dimensiuni: 152 x 229 x 14 mm
Greutate: 0.36 kg
Editura: Sudwestdeutscher Verlag Fur Hochschulschrifte