UMBC ebiquity

Context Broker Architecture (CoBrA)

Status: Past project

Project Description:
Context Broker Architecture (CoBrA) is an agent based architecture for supporting context-aware systems in smart spaces (e.g., intelligent meeting rooms, smart homes, and smart vehicles). Central to this architecture is an intelligent agent called context broker that maintains a shared model of context on the behalf of a community of agents, services, and devices in the space and provides privacy protections for the users in the space by enforcing the policy rules that they define.

Start Date: September 2002

End Date: October 2005

Principal Investigator:
Harry Chen, Part of his PhD disseration research

Anupam Joshi
Yun Peng

Anubhav Sonthalia

Tags: context, pervasive computing, semantic web, ontology


There are 16 associated publications:  Hide the list...

14 Refereed Publications


1. Harry Chen, "An Intelligent Broker Architecture for Pervasive Context-Aware Systems", PhdThesis, University of Maryland, Baltimore County, December 2004, 6137 downloads.

2. Harry Chen et al., "Intelligent Agents Meet the Semantic Web in Smart Spaces", Article, IEEE Internet Computing, November 2004, 4659 downloads.

3. Harry Chen et al., "SOUPA: Standard Ontology for Ubiquitous and Pervasive Applications", InProceedings, International Conference on Mobile and Ubiquitous Systems: Networking and Services, August 2004, 10661 downloads.

4. Harry Chen et al., "Intelligent Agents Meet Semantic Web in a Smart Meeting Room", InProceedings, Proceedings of the Third International Joint Conference on Autonomous Agents & Multi Agent Systems (AAMAS 2004), July 2004, 4867 downloads.

5. Harry Chen et al., "An Ontology for Context-Aware Pervasive Computing Environments", Article, Special Issue on Ontologies for Distributed Systems, Knowledge Engineering Review, May 2004, 6888 downloads.

6. Harry Chen et al., "Building an Autonomous Broker Agent for Smart Meeting Rooms", InBook, Submitted to Robotics and Autonomous Systems, April 2004.

7. Harry Chen et al., "The SOUPA Ontology for Pervasive Computing", InBook, Ontologies for agents: Theory and experiences, April 2004, 951 downloads.

8. Harry Chen et al., "A Context Broker for Building Smart Meeting Rooms", Proceedings, Proceedings of the AAAI Symposium on Knowledge Representation and Ontology for Autonomous Systems Symposium, 2004 AAAI Spring Symposium, March 2004, 7591 downloads.

9. Harry Chen et al., "Semantic Web in in the Context Broker Architecture", InProceedings, Proceedings of the Second Annual IEEE International Conference on Pervasive Computer and Communications, March 2004, 9623 downloads.


10. Harry Chen et al., "An Intelligent Broker for Context-Aware Systems", Article, Adjunct Proceedings of Ubicomp 2003, October 2003, 3350 downloads.

11. Harry Chen et al., "Semantic Web in a Pervasive Context-Aware Architecture", InProceedings, Workshop on Artificial Intelligence in Mobile System, 5th Annual Conf. on Ubiquitous Computing, October 2003, 7036 downloads.

12. Harry Chen et al., "Using OWL in a Pervasive Computing Broker", Article, Workshop on Ontologies in Agent Systems, AAMAS-2003, July 2003, 2678 downloads.


13. Harry Chen et al., "Beyond Distributed AI, Agent Teamwork in Ubiquitous Computing", Article, Workshop on Ubiquitous Agents on Embedded, Wearable, and Mobile Devices, AAMAS-2002, July 2002, 2707 downloads.


14. Harry Chen et al., "Creating Context-Aware Software Agents", Article, First GSFC/JPL Workshop on Radical Agent Concepts, September 2001, 2896 downloads.

2 Non-Refereed Publications


1. Harry Chen et al., "A Pervasive Computing Ontology for User Privacy Protection in the Context Broker Architecture", TechReport, University of Maryland, Baltimore County, July 2004, 3957 downloads.


2. Harry Chen, "An Intelligent Broker Architecture for Context-Aware Systems", TechReport, PhD Dissertation Proposal, December 2002, 8700 downloads.


There are 7 associated resources:  Hide the list...

1. A Proposal for Pervasive Computing Standard Ontology, Document.

2. An Intelligent Broker for Pervasive Context-Aware Systems, Presentation.

3. CoBrA, Web Site.

4. F-OWL, Web Site.

5. My Experience in Building Ontology-driven Applications, Presentation.

6. My Experience in Building the CoBrA Eclipse Viewer, Presentation.

7. Semantic Web in UbiComp SIG, Web Site.


Research Areas:
 Context-Aware Computing
 Knowledge Representation and Reasoning
 Mobile Computing
 Multi-Agent Systems
 Security, Trust and Privacy
 Semantic Web



  1. (Project) Context Broker Architecture (CoBrA) has developer (Person) Harry Chen.
  2. (Project) Context Broker Architecture (CoBrA) has principal investigator (Person) Harry Chen