Mobile wireless computing: challenges in data management
Communications of the ACM
Using semantic caching to manage location dependent data in mobile computing
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Location dependent query processing
Proceedings of the 2nd ACM international workshop on Data engineering for wireless and mobile access
An introduction to spatial database systems
The VLDB Journal — The International Journal on Very Large Data Bases - Spatial Database Systems
Cache Invalidation and Replacement Strategies for Location-Dependent Data in Mobile Environments
IEEE Transactions on Computers
Mobile Computing and Databases-A Survey
IEEE Transactions on Knowledge and Data Engineering
Querying in Highly Mobile Distributed Environments
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
Semantic Data Caching and Replacement
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Semantic Caching in Location-Dependent Query Processing
SSTD '01 Proceedings of the 7th International Symposium on Advances in Spatial and Temporal Databases
A predicate-based caching scheme for client-server database architectures
The VLDB Journal — The International Journal on Very Large Data Bases
Answering queries using views: A survey
The VLDB Journal — The International Journal on Very Large Data Bases
Location Dependent Data and its Management in Mobile Databases
DEXA '98 Proceedings of the 9th International Workshop on Database and Expert Systems Applications
Location-based spatial queries
Proceedings of the 2003 ACM SIGMOD international conference on Management of data
Location-dependent query processing: Where we are and where we are heading
ACM Computing Surveys (CSUR)
An information relevancy-oriented cache replacement policy in PCS
Mobility '09 Proceedings of the 6th International Conference on Mobile Technology, Application & Systems
Applying the effective distance to location-dependent data
OTM'06 Proceedings of the 2006 international conference on On the Move to Meaningful Internet Systems: AWeSOMe, CAMS, COMINF, IS, KSinBIT, MIOS-CIAO, MONET - Volume Part II
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In a mobile environment, the result of queries often depends on the client's location. These queries are called location dependent queries (LDQ). Applying the concept of caching to LDQs provides a means for efficient processing when queries exhibit both semantic similarity and spatial locality. Existing LDQ caching schemes require database (DB) servers to provide validity regions (VR) for LDQ results, which introduces significant processing and/or storage overhead. As a result, DB servers may only provide the validity information conditionally or do not provide it at all. We propose a novel LDQ proxy scheme that can estimate the VR if DB servers do not provide such information. The simulation results show that the LDQ proxy reduces both the LDQ response time and the database workload.