Matching events in a content-based subscription system
Proceedings of the eighteenth annual ACM symposium on Principles of distributed computing
PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
DOMINO: databases fOr MovINg Objects tracking
SIGMOD '99 Proceedings of the 1999 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
Indexing moving points (extended abstract)
PODS '00 Proceedings of the nineteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Indexing the positions of continuously moving objects
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Achieving scalability and expressiveness in an Internet-scale event notification service
Proceedings of the nineteenth annual ACM symposium on Principles of distributed computing
Realms and states: a framework for location aware mobile computing
WMC '01 Proceedings of the 1st international workshop on Mobile commerce
Concepts for personal location privacy policies
Proceedings of the 3rd ACM conference on Electronic Commerce
Modeling and Querying Moving Objects
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
Novel Approaches in Query Processing for Moving Object Trajectories
VLDB '00 Proceedings of the 26th International Conference on Very Large Data Bases
Moving Objects Databases: Issues and Solutions
SSDBM '98 Proceedings of the 10th International Conference on Scientific and Statistical Database Management
Towards the Observation of Spatial Events in Distributed Location-Aware Systems
ICDCSW '02 Proceedings of the 22nd International Conference on Distributed Computing Systems
Mobile Push: Delivering Content to Mobile Users
ICDCSW '02 Proceedings of the 22nd International Conference on Distributed Computing Systems
Indexing the Current Positions of Moving Objects Using the Lazy Update R-tree
MDM '02 Proceedings of the Third International Conference on Mobile Data Management
Location Aggregation from Multiple Sources
MDM '02 Proceedings of the Third International Conference on Mobile Data Management
CAMEL: A Moving Object Database Approach for Intelligent Location Aware Services
MDM '03 Proceedings of the 4th International Conference on Mobile Data Management
High-performance spatial indexing for location-based services
WWW '03 Proceedings of the 12th international conference on World Wide Web
Challenges in Location-Aware Computing
IEEE Pervasive Computing
Indexing of Moving Objects for Location-Based Services
ICDE '02 Proceedings of the 18th International Conference on Data Engineering
A Modular Location-Aware Service and Application Platform
ISCC '99 Proceedings of the The Fourth IEEE Symposium on Computers and Communications
An efficient spatial publish/subscribe system for intelligent location-based services
Proceedings of the 2nd international workshop on Distributed event-based systems
Detecting identifiable areas in mobile environments
Proceedings of the 2006 ACM symposium on Applied computing
SIMPLE: developing a LBS positioning solution
MUM '05 Proceedings of the 4th international conference on Mobile and ubiquitous multimedia
Inferring generic activities and events from image content and bags of geo-tags
CIVR '08 Proceedings of the 2008 international conference on Content-based image and video retrieval
Event recognition: viewing the world with a third eye
MM '08 Proceedings of the 16th ACM international conference on Multimedia
Location-dependent query processing: Where we are and where we are heading
ACM Computing Surveys (CSUR)
SEUS'07 Proceedings of the 5th IFIP WG 10.2 international conference on Software technologies for embedded and ubiquitous systems
Geotagging in multimedia and computer vision--a survey
Multimedia Tools and Applications
PerPos: a translucent positioning middleware supporting adaptation of internal positioning processes
Proceedings of the ACM/IFIP/USENIX 11th International Conference on Middleware
Review: A framework for awareness maintenance
Journal of Network and Computer Applications
Inferring photographic location using geotagged web images
Multimedia Tools and Applications
A content-based publish/subscribe matching algorithm for 2d spatial objects
Middleware'11 Proceedings of the 12th ACM/IFIP/USENIX international conference on Middleware
A content-based publish/subscribe matching algorithm for 2D spatial objects
Proceedings of the 12th International Middleware Conference
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With the advance in wireless Internet and mobile computing, location-based services (LBS)--the capability to deliver location-aware content to subscribers on the basis of the positioning capability of the wireless infrastructure--are emerging as key value-added services that telecom operators can offer. To support efficient and effective development and deployment of innovative location-aware applications, a flexible and resilient middleware should be built as the enabling infrastructure. This paper presents the research and efforts made in the IBM China Research Laboratory toward developing an infrastructure that supports location-aware services. This infrastructure is based on a proposed location operating reference model (LORE), which addresses many major aspects of building location-aware services, including positioning, location modeling, location-dependent query processiug, tracking, and intelligent location-aware message notification. Three key components of the infrastructure--the location server, a moving object database, and a spatial publish/subscribe engine--are introduced in detail. The location server has a common location adapter framework that supports heterogeneous positioning techniques and industry-standard location application program interfaces (APIs). The moving object database manages the location stream and processes the location-based queries. The spatial publish/subscribe engine enables intelligent location-aware message notification. We also present some location-aware application demonstrations that leverage the LORE infrastructure. Part of our work has been tested in pilot projects with leading carriers in China and has been integrated into the IBM WebSphere® Everyplace® Suite.