Towards QoC-aware location-based services

Sophie Chabridon (1, 2, 3, 4) , Cao Cuong Ngo (2) , Zied Abid (2, 3, 4) , Denis Conan (1, 2, 3, 4) , Chantal Taconet (1, 2, 3, 4) , Alain Ozanne (2)

1 ACMES-SAMOVAR - Architecture, Cloud continuum, formal Models, artificial intElligence and Services in distributed computing
2 TSP - INF - Département Informatique
3 SAMOVAR - Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux
4 CNRS - Centre National de la Recherche Scientifique

As location-based services on mobile devices are entering more and more everyday life, we are concerned in this paper with finding ways to master the level of quality of location information in order to take relevant decisions. Location being a typical example of context information, we manipulate it using the COSMOS framework that we develop for the management of context data and their associated quality meta-data or quality of context (QoC). We consider several QoC parameters that are important for location and determine how the QoC can help a location aggregator component to identify the current region where a user is located. The mechanisms we propose support a pragmatic approach in which application designers or deployers survey an area to demarcate regions surrounding locations, and application users are localized into these regions and are presented with the quality of the estimate. We report on the experimentation we performed on the campus of our institute collecting information from Wi-Fi, 3G networks and GPS signals, and show the accuracy we obtain at no additional infrastructure cost

Mots clés: Context; Quality of context; Location; Uncertainty

Domaines: Informatique [cs]; Informatique ubiquitaire

Sophie Chabridon, Cao Cuong Ngo, Zied Abid, Denis Conan, Chantal Taconet, et al.. Towards QoC-aware location-based services. 11th Distributed Applications and Interoperable Systems (DAIS), Jun 2011, Reykjavik, Iceland. pp.71 - 76, ⟨10.1007/978-3-642-21387-8_6⟩. ⟨hal-01303054⟩