Geofencing and Background Tracking – The Next Features in LBSs Axel Küpper*, Ulrich Bareth*, and Behrend Freese** * TU Berlin – Deutsche Telekom Laboratories, TEL 19, Ernst-Reuter-Platz 7, 10583 Berlin ** Ubiry GmbH, Heidefeld 21, 14532 Kleinmachnow [axel.kuepper|[email protected]] [email protected] Abstract: The upcoming generation of LBSs will be significantly determined by geofencing applications and background tracking. A geofence is a small geo- graphic area that is defined to generate a location event as soon as a user enters or leaves this geofence and to process this event in the context of an LBS. Back- ground tracking continuously monitors the whereabouts of a user and is thus the major prerequisite for detecting location events. Both functions can be regarded as important enablers for an improvement and broad establishment of information re- levance in mobile environments. After an overview of the emergence of LBSs in the recent years, this article provides an introduction into geofencing and back- ground tracking and demonstrates their working for location-based recommender systems. 1 A Brief History of Location-based Services The success of the Mobile Internet in the recent years has created a huge market for new applications in the area of information relevance. The most innovative of these applica- tions belong to the category of Location-based Services (LBSs), which generate, com- pile, select, or filter information or perform other actions by taking into consideration the current location of the user [Kü05]. Prominent examples are so-called finder or points- of-interest (PoI) services , which deliver lists of nearby points-of-interest to the user, for example, restaurants, filling stations, or ATMs. Recently, the idea of LBSs has also been adopted by social community platforms, which now enable location sharing , that is, the mutual exchange of current whereabouts among their members. INFORMATIK 2011 - Informatik schafft Communities 41. Jahrestagung der Gesellschaft für Informatik , 4.-7.10.2011, Berlin erschienen im Tagungsband der INFORMATIK 2011 Lecture Notes in Informatics, Band P192 ISBN 978-3-88579-286-4 weitere Artikel online:
However, location is just one example that describes the current situation of the mobile user. Other parameters are weather conditions on the spot, his vital functions, or the current means of transportation while travelling, to name only a few. The sum of all parameters that are taken into consideration for delivering the user with relevant infor- mation are called context , and they are derived and processed by so-called Context- aware Services (CASs), see [DA99]. Thus, LBSs can be regarded as a special appea- rance of the more general CASs. However, a technical barrier for a successful mass-mar- ket introduction of CASs is still the automatic detection of context parameters, which of- ten suffers from the non-availability of appropriate sensors in mobile devices or in the environment as well as from the potential variety of such parameters. The location of the
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