Data replication for mobile computers
SIGMOD '94 Proceedings of the 1994 ACM SIGMOD international conference on Management of data
Local anchor scheme for reducing signaling costs in personal communications networks
IEEE/ACM Transactions on Networking (TON)
An adaptive data replication algorithm
ACM Transactions on Database Systems (TODS)
On proxy agents, mobility, and web access
Mobile Networks and Applications
Location dependent query processing
Proceedings of the 2nd ACM international workshop on Data engineering for wireless and mobile access
Principles of Wireless Networks: A Unified Approach
Principles of Wireless Networks: A Unified Approach
An Overview of Location-Based Services
BT Technology Journal
Cache Management for Mobile Databases: Design and Evaluation
ICDE '98 Proceedings of the Fourteenth International Conference on Data Engineering
Location Dependent Data and its Management in Mobile Databases
DEXA '98 Proceedings of the 9th International Workshop on Database and Expert Systems Applications
A generic framework for monitoring continuous spatial queries over moving objects
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
The VLDB Journal — The International Journal on Very Large Data Bases
Mobile Networks and Applications
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Location dependant data are becoming very popular in mobile environments. To improve system performance and facilitates QoS several methods like location aware proxies, caching etc. are being used. Based on the classification of different query models and data, we propose an architecture with hierarchical service database for effective location based services to reduce the network cost with required quality of service (QoS). In our paper, a hierarchical database structure with collocated proxy is proposed to facilitate location based service delivery for both location dependant and independent data to the clients. A mobile user communicates with the proxy that is attached with the local (server) database of the cell, which routes the query to the appropriate level of the hierarchical database structure, based on the query type and location of the target object. A database update method has also been proposed based on the update frequency and access characteristics of data objects. We devise a general architecture and cost model for servicing location dependant and independent data, to reduce the network cost by maintaining quality of service and improve response time under changing user mobility and access patterns. Further when the mobile user engaged in multiple services, the per-service proxies can be employed to further improve the access time.