MACTAS: Self-Attention-Based Inter-Agent Communication in Multi-Agent Reinforcement Learning with Action-Value Function Decomposition

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Hauptverfasser: Wojtala, Maciej, Stefańczyk, Bogusz, Bogucki, Dominik, Lepak, Łukasz, Strykowski, Jakub, Wawrzyński, Paweł
Format: Preprint
Veröffentlicht: 2025
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author Wojtala, Maciej
Stefańczyk, Bogusz
Bogucki, Dominik
Lepak, Łukasz
Strykowski, Jakub
Wawrzyński, Paweł
author_facet Wojtala, Maciej
Stefańczyk, Bogusz
Bogucki, Dominik
Lepak, Łukasz
Strykowski, Jakub
Wawrzyński, Paweł
contents Communication is essential for the collective execution of complex tasks by human agents, motivating interest in communication mechanisms for multi-agent reinforcement learning (MARL). However, existing communication protocols in MARL are often complex and non-differentiable. In this work, we introduce a self-attention-based communication method that exchanges information between the agents in MARL. Our proposed approach is fully differentiable, allowing agents to learn to generate messages in a reward-driven manner. The method can be seamlessly integrated with any action-value function decomposition algorithm and can be viewed as an orthogonal extension of such decompositions. Notably, it includes a fixed number of trainable parameters, independent of the number of agents, which makes it scalable to large systems. Experimental results on the SMACv2 benchmark demonstrate the effectiveness of our approach, which achieves state-of-the-art performance on a number of maps. makes it scalable to large systems. Experimental results on the SMACv2 benchmark demonstrate the effectiveness of our approach, which achieves state-of-the-art performance on a number of maps.
format Preprint
id arxiv_https___arxiv_org_abs_2508_13661
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle MACTAS: Self-Attention-Based Inter-Agent Communication in Multi-Agent Reinforcement Learning with Action-Value Function Decomposition
Wojtala, Maciej
Stefańczyk, Bogusz
Bogucki, Dominik
Lepak, Łukasz
Strykowski, Jakub
Wawrzyński, Paweł
Machine Learning
Multiagent Systems
Communication is essential for the collective execution of complex tasks by human agents, motivating interest in communication mechanisms for multi-agent reinforcement learning (MARL). However, existing communication protocols in MARL are often complex and non-differentiable. In this work, we introduce a self-attention-based communication method that exchanges information between the agents in MARL. Our proposed approach is fully differentiable, allowing agents to learn to generate messages in a reward-driven manner. The method can be seamlessly integrated with any action-value function decomposition algorithm and can be viewed as an orthogonal extension of such decompositions. Notably, it includes a fixed number of trainable parameters, independent of the number of agents, which makes it scalable to large systems. Experimental results on the SMACv2 benchmark demonstrate the effectiveness of our approach, which achieves state-of-the-art performance on a number of maps. makes it scalable to large systems. Experimental results on the SMACv2 benchmark demonstrate the effectiveness of our approach, which achieves state-of-the-art performance on a number of maps.
title MACTAS: Self-Attention-Based Inter-Agent Communication in Multi-Agent Reinforcement Learning with Action-Value Function Decomposition
topic Machine Learning
Multiagent Systems
url https://arxiv.org/abs/2508.13661