PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Updating and Querying Databases that Track Mobile Units
Distributed and Parallel Databases - Special issue on mobile data management and applications
Indexing the positions of continuously moving objects
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
A foundation for representing and querying moving objects
ACM Transactions on Database Systems (TODS)
Database System Implementation
Database System Implementation
Modeling and Querying Moving Objects
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
Capturing the Uncertainty of Moving-Object Representations
SSD '99 Proceedings of the 6th International Symposium on Advances in Spatial Databases
Monitoring Continuous Location Queries Using Mobile Agents
ADBIS '02 Proceedings of the 6th East European Conference on Advances in Databases and Information Systems
Location-Dependent Queries in Mobile Contexts: Distributed Processing Using Mobile Agents
IEEE Transactions on Mobile Computing
Query Language for Location-Based Services: A Model Checking Approach
IEICE - Transactions on Information and Systems
Location-dependent query processing under soft real-time constraints
Mobile Information Systems
Location-dependent query processing: Where we are and where we are heading
ACM Computing Surveys (CSUR)
Moving objects management system supporting location data stream
CIMMACS'05 Proceedings of the 4th WSEAS international conference on Computational intelligence, man-machine systems and cybernetics
Design of query language for location-based services
W2GIS'05 Proceedings of the 5th international conference on Web and Wireless Geographical Information Systems
Leveraging computation sharing and parallel processing in location-dependent query processing
The Journal of Supercomputing
A generic data model for moving objects
Geoinformatica
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As prices of basic enabling equipment like smart cell phones, hand holds, wireless modems, and GPS devices continue to drop rapidly, International Data Corp (IDC) predicts that the number of wireless subscribers worldwide will soar to 1.1 billion in 2003. Spurred by the combination of expensive new location-based infrastructure and an enormous market of mobile users, companies will roll out new wireless applications to re-coop their technology investments and increase customer loyalty and switching costs. These applications are collectively called location-based services. In this position paper we outline a novel and comprehensive model for moving objects in location based services. The model is different than other models proposed in the literature in the sense that is captures the spatial, temporal, and uncertain aspects of the location of a moving object. These aspects are captured in the concept of a trajectory. We argue that the existing prevalent model in industry, point location management, has severe drawbacks, and explain why our trajectory model solves these problems. We also outline a set of operators to access the trajectories database.