Mobile users: to update or not to update?
Wireless Networks
Location management support for mobile commerce applications
WMC '01 Proceedings of the 1st international workshop on Mobile commerce
On the Generation of Spatiotemporal Datasets
SSD '99 Proceedings of the 6th International Symposium on Advances in Spatial Databases
Location polling algorithm for alerting service based on location
W2GIS'05 Proceedings of the 5th international conference on Web and Wireless Geographical Information Systems
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The location-based alert service is the one of the most practical location- based services. It alerts mobile users when approaching and entering into or leaving from a specific region, and provides certain services previously set by the users. To provide the service, the location of mobile users needs to be acquired periodically. However, a server which handles the location of users gets more burdens when the number of users increases. Hence it is a critical issue to properly adjust the location data acquisition time interval while maintaining the accuracy of the service. In this paper we propose two effective location acquisition algorithms, the speed-based acquisition algorithm and the anglebased acquisition algorithm. The proposed algorithms could reduce the irrelevant location information acquisition based on the movement of moving objects. The speed-based acquisition algorithm and the angle-based acquisition algorithm reduced the average number of location acquisitions by 20% and 37% over the distance-based acquisition algorithm, respectively, while they both maintained the same level of accuracy.