C 3 LRTA*, color code coordinated LRTA* algorithm

In this paper we present an extension to the Learning Real-Time A* (LRTA*) algorithm by utilizing a color coded coordination scheme. The new algorithm (C3LRTA*) has been applied to solve randomly generated mazes with multiple problem solvers. Our work suggests that by using the proposed modification, we get an improvement in LRTA*. Multiple agents coordinate their actions by using color code, a heritage from those agents, which have previous traversed the current state. We have evaluated this coordination scheme on a large number of test cases with random obstacles and varying obstacle ratio. Experimentation has shown that C3LRTA* performs better then LRTA*. In addition, an increase in the number of agents and/or obstacle ratio, solution quality is improved as compared to LRTA*

[1]  Faruk Polat,et al.  Coordination of intelligent agents in real‐time search , 2002, Expert Syst. J. Knowl. Eng..

[2]  Kevin Knight,et al.  Are Many Reactive Agents Better Than a Few Deliberative Ones? , 1993, IJCAI.

[3]  Makoto Yokoo,et al.  Multi-state commitment search , 1998, Proceedings Tenth IEEE International Conference on Tools with Artificial Intelligence (Cat. No.98CH36294).

[4]  Richard E. Korf,et al.  Real-Time Heuristic Search , 1990, Artif. Intell..

[5]  Faruk Polat,et al.  Real-Time Edge Follow: A New Paradigm to Real-Time Path Search , 2001, GAME-ON.

[6]  Yasuhiko Kitamura,et al.  Organizational Strategies for Multiagent Real-time Search , 1996 .

[7]  Mihai Horia Zaharia,et al.  A New Approach in Agent Path-Finding using State Mark Gradients , 2004, Comput. Sci. J. Moldova.

[8]  Joseph Eckerle,et al.  New strategies in real-time heuristic search , 1997 .

[9]  V. Scott Gordon,et al.  Evolving sparse direction maps for maze pathfinding , 2004, Proceedings of the 2004 Congress on Evolutionary Computation (IEEE Cat. No.04TH8753).

[10]  Toru Ishida,et al.  Real-Time Search for Autonomous Agents and Multiagent Systems , 1998, Autonomous Agents and Multi-Agent Systems.

[11]  Sven Koenig,et al.  A comparison of fast search methods for real-time situated agents , 2004, Proceedings of the Third International Joint Conference on Autonomous Agents and Multiagent Systems, 2004. AAMAS 2004..