Data Organization Issues for Location-Dependent Queries in Mobile Computing

  • Sanjay Kumar Madria
  • Bharat Bhargava
  • Evaggelia Pitoura
  • Vijay Kumar
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1884)


We consider queries which originate from a mobile unit and whose result depends on the location of the user who initiates the query. Example of such a query is How many people are living in the region I am currently in?” We execute such queries based on location-dependent data involved in their processing. We build concept hierarchies based on the location data. These hierarchies define mapping among different granularities of locations. One such hierarchy is to generate domain knowledge about the cities that belong to a state. The hierarchies are used as distributed directories to assist in finding the database or relation that contains the values of the location-dependent attribute in a particular location. We extend concept hierarchies to include spatial indexes on the location-dependent attributes. Finally, we discuss how to partition and replicate relations based on the location to process the queries efficiently. We briefly discuss the implementation issues.


Global Position System Query Processing Location Attribute Mobile Computing Mobile Host 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Sanjay Kumar Madria
    • 1
  • Bharat Bhargava
    • 1
  • Evaggelia Pitoura
    • 2
  • Vijay Kumar
    • 3
  1. 1.Department of Computer SciencePurdue UniversityWest Lafayette
  2. 2.Computer Science DepartmentUniversity of IoanninaGreece
  3. 3.Department of Computer NetworkingUniversity of Missouri-Kansas CityMO

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