Modelling topological and metrical properties in physical processes
Proceedings of the first international conference on Principles of knowledge representation and reasoning
Mobile wireless computing: challenges in data management
Communications of the ACM
The stick-e note architecture: extending the interface beyond the user
Proceedings of the 2nd international conference on Intelligent user interfaces
The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
Cyberguide: a mobile context-aware tour guide
Wireless Networks - Special issue: mobile computing and networking: selected papers from MobiCom '96
The context toolkit: aiding the development of context-enabled applications
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
Developing a context-aware electronic tourist guide: some issues and experiences
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
The Clio project: managing heterogeneity
ACM SIGMOD Record
Context-Aware Telephony Over WAP
Personal and Ubiquitous Computing
The Geometry of Uncertainty in Moving Objects Databases
EDBT '02 Proceedings of the 8th International Conference on Extending Database Technology: Advances in Database Technology
Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
The Aware Home: A Living Laboratory for Ubiquitous Computing Research
CoBuild '99 Proceedings of the Second International Workshop on Cooperative Buildings, Integrating Information, Organization, and Architecture
A Model-Based, Open Architecture for Mobile, Spatially Aware Applications
SSTD '01 Proceedings of the 7th International Symposium on Advances in Spatial and Temporal Databases
Making Everyday Life Easier Using Dense Sensor Networks
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
Answering queries using views: A survey
The VLDB Journal — The International Journal on Very Large Data Bases
The Location Stack: A Layered Model for Location in Ubiquitous Computing
WMCSA '02 Proceedings of the Fourth IEEE Workshop on Mobile Computing Systems and Applications
ContextCube " Providing Context Information Ubiquitously
ICDCSW '03 Proceedings of the 23rd International Conference on Distributed Computing Systems
Architecture of a Large-Scale Location Service
ICDCS '02 Proceedings of the 22 nd International Conference on Distributed Computing Systems (ICDCS'02)
ISWC '99 Proceedings of the 3rd IEEE International Symposium on Wearable Computers
Web Services and Service-Oriented Architecture: The Savvy Manager's Guide
Web Services and Service-Oriented Architecture: The Savvy Manager's Guide
From Home to World - Supporting Context-aware Applications through World Models
PERCOM '04 Proceedings of the Second IEEE International Conference on Pervasive Computing and Communications (PerCom'04)
How to Observe Real-World Events through a Distributed World Model
ICPADS '04 Proceedings of the Parallel and Distributed Systems, Tenth International Conference
Efficiently Managing Context Information for Large-Scale Scenarios
PERCOM '05 Proceedings of the Third IEEE International Conference on Pervasive Computing and Communications
Schema Matching Using Duplicates
ICDE '05 Proceedings of the 21st International Conference on Data Engineering
DCbot: Exploring the Web as Value-Added Service for Location-Based Applications
ICDE '05 Proceedings of the 21st International Conference on Data Engineering
Context-Aware Computing Applications
WMCSA '94 Proceedings of the 1994 First Workshop on Mobile Computing Systems and Applications
DCbot: finding spatial information on the web
DASFAA'05 Proceedings of the 10th international conference on Database Systems for Advanced Applications
Context-Aware Mashups for Mobile Devices
WISE '08 Proceedings of the 9th international conference on Web Information Systems Engineering
| Hi-index | 0.00 |
With the emerging availability of small and portable devices which are able to determine their position and to communicate wirelessly, mobile and spatially-aware applications become feasible. These applications rely on information that is bound to locations and managed by so-called location-based data services. Large-scale location-based systems have to cope efficiently with different types of data (mostly spatial or conventional). Each type poses its own requirements to the data server that is responsible for management and provisioning of the data. In addition to efficiency, it is overly important to provide for a combined and integrated usage of that data by the applications. In this paper we discuss various basic technologies to achieve a flexible, extensible, and scalable management of the context model and its data organized and managed by the different data servers. Based on a classification of location-based data services we introduce a service-oriented architecture that is built on a federation approach to efficiently support location-based applications. Furthermore, we report on the Nexus platform that realizes a viable implementation of that approach.