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Selecting the best valid scopes for wireless dissemination of location-dependent data

Published: 09 March 2003 Publication History

Abstract

Mobility of user poses new challenges to research on spatial data access. Spatial data cached in the mobile client may become invalid because of the movement of the client. To increase the reusability of the cached data, we can identify the valid scope of the spatial data (i.e., the spatial area within which the data is known to be valid) and save the valid scope as well as the data in the cache. In this paper, we study issues on the dissemination of spatial data and valid scopes in a wireless environment. We investigate methods for representing valid scopes and their impacts on system performance. A generic representation method, called the invalidation-efficiency-based (IEB) method, is proposed. Simulation experiments are conducted to compare the performance of IEB with other representation methods. Result shows that IEB is superior to the other methods because it tries to balance the precision and overhead of valid scopes.

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cover image ACM Conferences
SAC '03: Proceedings of the 2003 ACM symposium on Applied computing
March 2003
1268 pages
ISBN:1581136242
DOI:10.1145/952532
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Published: 09 March 2003

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Author Tags

  1. data dissemination
  2. location-dependent query
  3. mobile computing
  4. spatial data
  5. valid scope

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SAC03: ACM Symposium on Applied Computing
March 9 - 12, 2003
Florida, Melbourne

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