Mobile users: to update or not to update?
Wireless Networks
LeZi-update: an information-theoretic approach to track mobile users in PCS networks
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
Updating and Querying Databases that Track Mobile Units
Distributed and Parallel Databases - Special issue on mobile data management and applications
Experiences of developing and deploying a context-aware tourist guide: the GUIDE project
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Mobile communications
A location management technique to support lifelong numbering in personal communications services
ACM SIGMOBILE Mobile Computing and Communications Review
A Comparison of Protocols for Updating Location Information
Cluster Computing
Moving Objects Databases: Issues and Solutions
SSDBM '98 Proceedings of the 10th International Conference on Scientific and Statistical Database Management
Efficient proximity detection among mobile targets with dead reckoning
Proceedings of the 4th ACM international workshop on Mobility management and wireless access
Extending the LBS-framework TraX: Efficient proximity detection with dead reckoning
Computer Communications
Efficient clique detection among mobile targets
Mobility '08 Proceedings of the International Conference on Mobile Technology, Applications, and Systems
EnTracked: energy-efficient robust position tracking for mobile devices
Proceedings of the 7th international conference on Mobile systems, applications, and services
Direction-based proximity detection algorithm for location-based services
WOCN'09 Proceedings of the Sixth international conference on Wireless and Optical Communications Networks
Zone-based rss reporting for location fingerprinting
PERVASIVE'07 Proceedings of the 5th international conference on Pervasive computing
Context-aware and quality-aware algorithms for efficient mobile object management
Pervasive and Mobile Computing
Constrained tracking on a road network
EWSN'06 Proceedings of the Third European conference on Wireless Sensor Networks
Efficient proximity detection among mobile objects in road networks with self-adjustment methods
Proceedings of the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Proceedings of the 4th ACM SIGSPATIAL International Workshop on GeoStreaming
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An important aspect of location-aware services is the management of location information. To this end, location information needs to be transferred from a mobile device, which determines this information by means of a local positioning sensor (such as GPS), to a location service, where the location information can be queried by applications. Because bandwidth in wide area mobile communications is still scarce and expensive, it is important to use an update protocol that requires as few messages as possible while still guaranteeing a desired accuracy of the location information. To decrease the number of necessary update messages, so-called dead-reckoning strategies have been proposed. In this paper we give an overview of different variants of dead-reckoning protocols for updating location information and propose a new map-based protocol. While a simple dead-reckoning protocol already reduces the number of update messages in some cases by up to 83%, the map-based protocol further reduces their number by again up to 60% and is able to sustain these improvements for non-uniform movement.