This paper deals with real-time generalisation and integration in connection to building locationbased services. In the paper we are only interested in location-based services that besides service data also require cartographic data. The paper starts with describing service data according to the Open GIS consortium specification open location service (OpenLS). Then the paper describes a system ...

In an effort to offer context aware, location based services using the Bluetooth platform specification, a centralized framework has been developed that allows location approximation via sensor data from a ubiquitous Bluetooth sensor network consisting of numerous base stations. Distance from a certain base station of known position is extrapolated; a localization algorithm is applied to determ...

Location-based services (LBS) denote services provided to mobile users according to their geographic location. Such services are emerging as value-added services, and their implementation requires a secure and reliable wireless architecture. This paper identifies technical challenges related to LBS technologies, and presents a cost-effective wireless network architecture which can efficiently s...

Location tracking systems are becoming more relevant in many new environments, due to the fact they the core of context aware applications. This new concept can improve the way universities provide services and a wide number of companies do business. Inside university area, users location (both students, teachers and staff) gives rise to a new kind of services based on their profile and on the ...

Location Based Services (LBS) are gaining much importance for all kind of human activities ranging from tourist navigation to support of rescue teams in disaster management. LBS have been developed as an independent from GIS stream for wireless services, but nowadays about 80% of all supplied data is spatially related, i.e. they are presented in a form of 2D map (raster of vector). LBS is becom...

The paper reports the approach of our team “711” to recommend Brick-and-Mortar Store with Budget Constraints. By extensive studies, we find that the history data is very effective in this location based service recommendation and we exploit the history data in our recommendation from both the users’ aspect and the merchants’ aspect. Moreover, we extract predicative features from the train set a...

To offer location based services, service providers need to have access to Location Information (LI) regarding the users which they wish to serve; this is a potential privacy threat. We propose the use of constraints, i.e. statements limiting the use and distribution of LI, that are securely bound to the LI, as a means to reduce this threat. Constraints may themselves reveal information to any ...

Location-based services (LBS) have triggered a tremendous interest in both industry and academy. The interest can be measured by the number of hits using, for instance, Google search engine. The number returned from Google indicates the amount of web documents available on the Internet. Since only about 20% of online documents are indexed by search engines, the actual number of documents relate...

Homomorphic encryption schemes make it possible to perform arithmetic operations, like additions and multiplications, over encrypted values. This capability provides enhanced protection for data and offers new research directions, including blind data processing. Using homomorphic encryption schemes, a Location-Based Service (LBS) can process encrypted inputs to retrieve encrypted location-rela...

This paper discusses work being carried out by the Vocate module of the LOK8 project. The LOK8 project seeks to develop location-based services within intelligent social environments, such as museums, art galleries, office buildings, and so on. It seeks to do this using a wide range of media and devices employing multiple modalities. The Vocate module is responsible for the auditory aspect of t...