Today’s mobile devices allow end users to get information related to particular domain based on their current location, such as the fastest route to the nearest drugstore. However, in such Location-Based Services (LBS), richer and more targeted information is desirable. In many applications, end users would like to be notified about relevant events or places to visit in the near future accordin...

Mobile services available on mobile devices such as mobile phones and Personal Digital Assistants are a suitable instrument for spontaneous, ad-hoc access to information travellers need while being on the move. The supply of mobile services with specific relevance to the traveller is already well developed: Mobile Services allow to book last-minute trips, rental cars and hotels; they provide in...

This paper examines location-based services (LBS) from a broad perspective involving deWnitions, characteristics, and application prospects. We present an overview of LBS modeling regarding users, locations, contexts and data. The LBS modeling endeavors are cross-examined with a research agenda of geographic information science. Some core research themes are brieXy speculated. © 2006 Elsevier L...

We are heading rapidly towards a global computing and information infrastructure that will contain billions of wirelessly connected devices, many of which will offer so-called location-based services to their mobile users always and everywhere. Indeed, users will soon take ubiquitous wireless access to information and services for granted. This scenario is made possible by the rapid advances in...

Location information of mobile users is very sensitive with regard to privacy. This is especially true for proactive location based services (LBSs) where users are continuously tracked. Effective privacy enhancing technologies for these services are still an open field of research. In this paper, we focus on proactive location based community services (PLBCSs), such as mobile gaming or buddy tr...

In this paper, we consider the adaptation of differential privacy to the context of locationbased services (LBSs), which personalize the information provided to a user based on his current position. Assuming that the LBS provider is queried with a perturbed version of the position of the user instead of his exact one, we rely on differential privacy to quantify the level of indistinguishability...

Recent enhancements in location technologies reliability and precision are fostering the development of a new wave of applications that make use of the location information of users. Such applications introduces new aspects of access control which should be addressed. On the one side, precise location information may play an important role and can be used to develop Location-based Access Contro...

For centuries, people have been concerned with their spatial location and surroundings on Earth. The methods of describing routes and areas of space by one person to another have always been a function of the available resources. Today these resources include mobile phones, personal digital assistants and palmtop computers, providing people with detailed spatial information whilst ‘on the move’...