A hybrid approach to solving coarse-grained DisCSPs.

Lee, David; Arana, Inés; Ahriz, Hatem; Hui, Kit-Ying

Abstract

A coarse-grained Distributed Constraint Satisfaction Problem (DisCSP) consists of several loosely connected constraint satisfaction subproblems, each assigned to an individual agent. We present Multi-Hyb, a two-phase concurrent hybrid approach for solving DisCSPs. In the first phase, each agents subproblem is solved using systematic search which generates the key partial solutions to the global problem. Concurrently, a penalty-based local search algorithm attempts to find a global solution from these partial solutions. If phase 1 fails to find a solution, a phase 2 systematic search algorithm solves the problem using the knowledge gained from phase 1. We show that our approach is highly competitive in comparison with other coarse-grained DisCSP algorithms.

Citation

LEE, D., ARANA, I., AHRIZ, H. and HUI, K.-Y. 2009. A hybrid approach to solving coarse-grained DisCSPs. In Proceedings of the 8th International conference on autonomous agents and multiagent systems (AAMAS 2009), 10-15 May 2009, Budapest, Hungary. Richland, South Carolina: International Foundation for Autonomous Agents and Multiagent Systems (IFAAMAS) [online], pages 1235-1236. Available from: http://www.aamas-conference.org/Proceedings/aamas09/pdf/02_Extended_Abstract/C_SP_0555.pdf

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 8th International conference on autonomous agents and multiagent systems (AAMAS 2009)
• Start Date: May 10, 2009
• End Date: May 15, 2009
• Online Publication Date: Dec 31, 2009
• Publication Date: Dec 31, 2009
• Deposit Date: Jun 8, 2009
• Publicly Available Date: Jun 8, 2009
• Publisher: International Foundation for Autonomous Agents and Multiagent Systems (IFAAMAS)
• Peer Reviewed: Peer Reviewed
• Pages: 1235-1236
• Keywords: Artificial intelligence; Constraint satisfaction; Agent cooperation; Distributed problem solving
• Public URL: http://hdl.handle.net/10059/359
• Publisher URL: http://www.ifaamas.org/Proceedings/aamas09/pdf/02_Extended_Abstract/C_SP_0555.pdf
• Contract Date: Jun 8, 2009