The active badge location system
ACM Transactions on Information Systems (TOIS)
Providing location information in a ubiquitous computing environment (panel session)
SOSP '93 Proceedings of the fourteenth ACM symposium on Operating systems principles
Fundamental challenges in mobile computing
PODC '96 Proceedings of the fifteenth annual ACM symposium on Principles of distributed computing
Location-aware mobile applications based on directory services
MobiCom '97 Proceedings of the 3rd annual ACM/IEEE international conference on Mobile computing and networking
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
The anatomy of a context-aware application
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
The GSM System for Mobile Communications
The GSM System for Mobile Communications
A Map-Based Dead-Reckoning Protocol for Updating Location Information
IPDPS '02 Proceedings of the 16th International Parallel and Distributed Processing Symposium
Scalable processing of trajectory-based queries in space-partitioned moving objects databases
Proceedings of the 16th ACM SIGSPATIAL international conference on Advances in geographic information systems
EnTracked: energy-efficient robust position tracking for mobile devices
Proceedings of the 7th international conference on Mobile systems, applications, and services
Online trajectory data reduction using connection-preserving dead reckoning
Proceedings of the 5th Annual International Conference on Mobile and Ubiquitous Systems: Computing, Networking, and Services
On a generic uncertainty model for position information
QuaCon'09 Proceedings of the 1st international conference on Quality of context
Demonstrating EnTracked a system for energy-efficient position tracking for mobile devices
Proceedings of the 12th ACM international conference adjunct papers on Ubiquitous computing - Adjunct
Exposing position uncertainty in middleware
Proceedings of the 2nd International Workshop on Middleware for Pervasive Mobile and Embedded Computing
Efficient real-time trajectory tracking
The VLDB Journal — The International Journal on Very Large Data Bases
Context-aware and quality-aware algorithms for efficient mobile object management
Pervasive and Mobile Computing
Moving range queries in distributed complex event processing
Proceedings of the 6th ACM International Conference on Distributed Event-Based Systems
Opportunistic position update protocols for mobile devices
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
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Detailed location information of mobile objects, for example that of a user with a mobile computer or phone, is an important input for many location-aware applications. However, constantly updating the location information for thousands of mobile objects is not feasible. Therefore, special update protocols for location information are required that transmit the information as efficiently as possible, that is requiring only few update messages, while still being effective in returning the location information with the desired accuracy. Different classes of such update protocols are described in this paper and a new combined protocol is proposed. To be able to compare their effectiveness and efficiency, we present an analysis for the minimum and average resulting accuracy of the location information in comparison with the number of messages transmitted. We also present the results of simulations that we have performed to back up our analysis.