Japances Source pseudo-tree Japances Source

Toshihiro Matsui, Marius C. Silaghi, Katsutoshi Hirayama, Makoto Yokoo, Hiroshi Matsuo

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Cooperative problem solving with shared resources is important in practical multi-agent systems. Resource constraints are necessary to handle practical problems such as distributed task scheduling with limited resource availability. As a fundamental formalism for multi-agent cooperation, the Distributed Constraint Optimization Problem (DCOP) has been investigated. With DCOPs, the agent states and the relationships between agents are formalized into a constraint optimization problem. However, in the original DCOP framework, constraints for resources that are consumed by teams of agents are not well supported. A framework called Resource Constrained Distributed Constraint Optimization Problem (RCDCOP) has recently been proposed. In RCDCOPs, a limit on resource usage is represented as an n-ary constraint. Previous research addressing RCDCOPs employ a pseudo-tree based solver. The pseudo-tree is an important graph structure for constraint networks. A pseudo-tree implies a partial ordering of variables. However, n-ary constrained variables, which are placed on a single path of the pseudo-tree, decrease efficiency of the solver. We propose another method using (i) a pseudo-tree that is generated ignoring resource constraints and (ii) virtual variables representing the usage of resources. However the virtual variables increase search space. To improve pruning efciency of search, (iii) we apply a set of upper/lower bounds that are inferred from resource constraints. The efciency of the proposed method is evaluated by experiment.

寄稿の翻訳タイトルA resource constrained distributed constraint optimization method using resource constraint free pseudo-tree
本文言語Japanese
ページ(範囲)417-427
ページ数11
ジャーナルTransactions of the Japanese Society for Artificial Intelligence
24
5
DOI
出版ステータス出版済み - 2009

All Science Journal Classification (ASJC) codes

  • Software
  • Artificial Intelligence

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