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Evaluation of Content-Matched Range Monitoring Queries over Moving Objects in Mobile Computing Environments.

HaRim Jung1, MoonBae Song2, Hee Yong Youn3

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Summary

We introduce the group-aware query region tree (GQR-tree) for efficient content-matched (CM) range monitoring of moving objects. This novel structure reduces wireless communication costs and server workload, outperforming existing methods.

Keywords:
location sensinglocation-based servicelocation-update streammobile/ubiquitous computingmoving objectquery indexingrange monitoring query

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Area of Science:

  • Database Systems
  • Spatial Databases
  • Distributed Systems

Background:

  • Content-matched (CM) range monitoring queries are crucial for real-time tracking of moving objects.
  • Existing methods face challenges in efficiently managing spatial and non-spatial query attributes for moving objects.
  • Optimizing wireless communication cost and server workload is essential for scalable monitoring systems.

Purpose of the Study:

  • To propose a new query indexing structure, the group-aware query region tree (GQR-tree), for efficient CM range monitoring queries.
  • To enhance system performance by leveraging the computational capabilities of moving objects.
  • To reduce wireless communication costs and server workload.

Main Methods:

  • Development of the group-aware query region tree (GQR-tree) indexing structure.
  • Designing the GQR-tree to integrate spatial and non-spatial query conditions.
  • Utilizing object computational capabilities within the GQR-tree framework.

Main Results:

  • The GQR-tree demonstrates superior performance in evaluating CM range monitoring queries.
  • Significant reductions in wireless communication cost were observed.
  • Substantial decrease in server workload was achieved compared to existing methods.

Conclusions:

  • The GQR-tree is an effective indexing structure for efficient CM range monitoring of moving objects.
  • The proposed method offers a significant improvement in system performance.
  • The GQR-tree provides a scalable solution for real-time moving object monitoring.