Distributed Heuristic Multi-Agent Path Finding with Communication

• URL: http://arxiv.org/abs/2106.11365v1
• Date: Mon, 21 Jun 2021 18:50:58 GMT
• Title: Distributed Heuristic Multi-Agent Path Finding with Communication
• Authors: Ziyuan Ma, Yudong Luo, Hang Ma
• Abstract summary: Multi-Agent Path Finding (MAPF) is essential to large-scale robotic systems. Recent methods have applied reinforcement learning (RL) to learn decentralized polices in partially observable environments. This paper combines communication with deep Q-learning to provide a novel learning based method for MAPF.
• Score: 7.854890646114447
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Multi-Agent Path Finding (MAPF) is essential to large-scale robotic systems. Recent methods have applied reinforcement learning (RL) to learn decentralized polices in partially observable environments. A fundamental challenge of obtaining collision-free policy is that agents need to learn cooperation to handle congested situations. This paper combines communication with deep Q-learning to provide a novel learning based method for MAPF, where agents achieve cooperation via graph convolution. To guide RL algorithm on long-horizon goal-oriented tasks, we embed the potential choices of shortest paths from single source as heuristic guidance instead of using a specific path as in most existing works. Our method treats each agent independently and trains the model from a single agent's perspective. The final trained policy is applied to each agent for decentralized execution. The whole system is distributed during training and is trained under a curriculum learning strategy. Empirical evaluation in obstacle-rich environment indicates the high success rate with low average step of our method.

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