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The PLUS system is designed to efficiently track moving object locations on a road network and execute continuous spatial queries in support of location-based services. PLUS implements a novel lazy position update mechanism that significantly reduces the communication overhead and server indexing load related to frequent location updates in moving object and moving query scenarios. The contribution...
With the proliferation of mobile devices (e.g., PDAs, cell phones, etc.), location-based services have become more and more popular in recent years. However, users have to reveal their location information to access location-based services with existing service infrastructures. It is possible that adversaries could collect the location information, which in turn invades user's privacy. There are existing...
The European Union is presently funding collaborative research and development activities in the Sixth Framework Programme (FP 6) that covered the period of 2002-2006. Activities in the communications field have made significant progress toward advanced communication technologies, systems, and services, enabling low cost broadband end-to-end connectivity and seamless mobile and wireless access solutions...
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