User-centric data querying for location-based services

摘要

In this paper, we propose a novel type of location-dependent data queries, which we consider to be appropriate for implementing "nighborhood description", "route presentation", and similar functions in location-based services, and present a computational model for handling such queries. These queries are user-centric by means of being spatio-contextual, focused, and motion-adaptive. Our attempt is to reflect the abstraction ability of a specific user, and in this way to maximize the effectiveness and efficiency of achieving the user goals, i.e. the usability of the service, under restrictions on data volume posed by technical, economical and cognitive factors of mobile environments. We also present the results of an exemplary implementation of the model in a simple LBS.