Data broadcasting strategies over multiple unreliable wireless channels
CIKM '95 Proceedings of the fourth international conference on Information and knowledge management
Balancing push and pull for data broadcast
SIGMOD '97 Proceedings of the 1997 ACM SIGMOD international conference on Management of data
Updating and Querying Databases that Track Mobile Units
Distributed and Parallel Databases - Special issue on mobile data management and applications
Transmission of continuous query results in mobile computing systems
Information Sciences—Applications: An International Journal
Adaptive push-pull: disseminating dynamic web data
Proceedings of the 10th international conference on World Wide Web
Continual Queries for Internet Scale Event-Driven Information Delivery
IEEE Transactions on Knowledge and Data Engineering
Modeling and Querying Moving Objects
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
RTMonitor: real-time data monitoring using mobile agent technologies
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
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In this paper, using the real-time navigation system, RETINA, as an example, we study the important design issues underlying the processing of location-dependent continuous queries, especially those requiring access to data describing the current status of a dynamic environment and possessing spatial properties. To reduce the probability of missing the arrival deadline associated with each navigation request, we use a time-stamp with prediction scheme to model the traffic data and replicated dynamic directed graphs to organize the traffic data required for path searching and path calculation. Correctness of the best path calculations and scalability of the system are improved through an adaptive Push or Pull (APoP) scheme to monitor the best path and traffic data in navigation. A prototype and simulation results demonstrate the effectiveness of the system.