Sleepers and workaholics: caching strategies in mobile environments
SIGMOD '94 Proceedings of the 1994 ACM SIGMOD international conference on Management of data
R-trees: a dynamic index structure for spatial searching
SIGMOD '84 Proceedings of the 1984 ACM SIGMOD international conference on Management of data
A Hybrid Index Technique for Power Efficient Data Broadcast
Distributed and Parallel Databases
Data Management in Location-Dependent Information Services
IEEE Pervasive Computing
Cache Invalidation and Replacement Strategies for Location-Dependent Data in Mobile Environments
IEEE Transactions on Computers
Data on Air: Organization and Access
IEEE Transactions on Knowledge and Data Engineering
Optimizing Index Allocation for Sequential Data Broadcasting in Wireless Mobile Computing
IEEE Transactions on Knowledge and Data Engineering
Broadcast-Based Data Access in Wireless Environments
EDBT '02 Proceedings of the 8th International Conference on Extending Database Technology: Advances in Database Technology
The D-Tree: An Index Structure for Planar Point Queries in Location-Based Wireless Services
IEEE Transactions on Knowledge and Data Engineering
Spatial queries in wireless broadcast systems
Wireless Networks - Special issue: Pervasive computing and communications
An efficient nearest neighbor algorithm for P2P settings
dg.o '05 Proceedings of the 2005 national conference on Digital government research
Continuous nearest neighbor monitoring in road networks
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Broadcasting and prefetching schemes for location dependent information services
W2GIS'04 Proceedings of the 4th international conference on Web and Wireless Geographical Information Systems
A scalable nearest neighbor search in p2p systems
DBISP2P'04 Proceedings of the Second international conference on Databases, Information Systems, and Peer-to-Peer Computing
P2PR-Tree: an R-tree-based spatial index for peer-to-peer environments
EDBT'04 Proceedings of the 2004 international conference on Current Trends in Database Technology
Opportunistic data dissemination in mobile peer-to-peer networks
SSTD'05 Proceedings of the 9th international conference on Advances in Spatial and Temporal Databases
Mobile continuous nearest neighbor queries on air
Proceedings of the 16th ACM SIGSPATIAL international conference on Advances in geographic information systems
SPID: a novel P2P-based information diffusion scheme for mobile networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Short communication: Location-based grid-index for spatial query processing
Expert Systems with Applications: An International Journal
| Hi-index | 14.98 |
Indexing provides for selective tuning but suffers from the drawback that, in order to conserve battery power, the client has to wait for and tune to the index segment. In Location-Aware Mobile Services (LAMSs), it is important to reduce the query response time since a late query response may contain out-of-date information. In this paper, we present a broadcast-based spatial query processing scheme designed to support Nearest Neighbor (NN) query processing. With the proposed schemes, broadcast data items are sorted sequentially based on their locations and the clients can selectively tune to the desired data item without the need for an index segment. For the purpose of selective tuning, we present the Exponential Sequence Scheme (ESS) and Cluster-Based Fibonacci Sequence Scheme (CFS) schemes. The ESS and CFS schemes attempt to conserve battery power. The performance of our schemes is investigated in relation to various environmental variables such as the distributions of data objects, the average speed of the clients, and the size of the service area. The resulting latency and tuning time are close to the optimum values, as our analysis and simulation results indicate.