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Many cooperative multiagent reinforcement learning environments provide agents with a sparse team-based reward, as well as a dense agent-specific reward that incentivizes learning basic skills. Training policies solely on the team-based…

Machine Learning · Computer Science 2020-10-13 Shauharda Khadka , Somdeb Majumdar , Santiago Miret , Stephen McAleer , Kagan Tumer

Efficient exploration in multi-agent reinforcement learning (MARL) is a challenging problem when receiving only a team reward, especially in environments with sparse rewards. A powerful method to mitigate this issue involves crafting dense…

Machine Learning · Computer Science 2025-07-28 Xuefei Wu , Xiao Yin , Yuanyang Zhu , Chunlin Chen

Discovering successful coordinated behaviors is a central challenge in Multi-Agent Reinforcement Learning (MARL) since it requires exploring a joint action space that grows exponentially with the number of agents. In this paper, we propose…

Machine Learning · Computer Science 2021-10-14 Ammar Fayad , Majd Ibrahim

Multi-Agent Reinforcement Learning (MARL) has achieved significant success in large-scale AI systems and big-data applications such as smart grids, surveillance, etc. Existing advancements in MARL algorithms focus on improving the rewards…

Machine Learning · Computer Science 2023-09-14 Samuel Wiggins , Yuan Meng , Rajgopal Kannan , Viktor Prasanna

Multi-agent reinforcement learning (MARL) extends (single-agent) reinforcement learning (RL) by introducing additional agents and (potentially) partial observability of the environment. Consequently, algorithms for solving MARL problems…

Multiagent Systems · Computer Science 2019-09-12 Yilun Zhou , Derrik E. Asher , Nicholas R. Waytowich , Julie A. Shah

In cooperative multi-agent reinforcement learning (MARL), agents aim to achieve a common goal, such as defeating enemies or scoring a goal. Existing MARL algorithms are effective but still require significant learning time and often get…

Machine Learning · Computer Science 2024-03-08 Hyungho Na , Yunkyeong Seo , Il-chul Moon

Multi-Agent Reinforcement Learning (MARL) is a challenging subarea of Reinforcement Learning due to the non-stationarity of the environments and the large dimensionality of the combined action space. Deep MARL algorithms have been applied…

Machine Learning · Computer Science 2021-07-27 Yuanchao Xu , Amal Feriani , Ekram Hossain

The multi-agent setting is intricate and unpredictable since the behaviors of multiple agents influence one another. To address this environmental uncertainty, distributional reinforcement learning algorithms that incorporate uncertainty…

Machine Learning · Computer Science 2023-03-06 Jihwan Oh , Joonkee Kim , Minchan Jeong , Se-Young Yun

Multi-agent deep reinforcement learning (MARL) suffers from a lack of commonly-used evaluation tasks and criteria, making comparisons between approaches difficult. In this work, we provide a systematic evaluation and comparison of three…

Machine Learning · Computer Science 2021-11-10 Georgios Papoudakis , Filippos Christianos , Lukas Schäfer , Stefano V. Albrecht

Multi-agent reinforcement learning (MARL) algorithms often struggle to find strategies close to Pareto optimal Nash Equilibrium, owing largely to the lack of efficient exploration. The problem is exacerbated in sparse-reward settings,…

Machine Learning · Computer Science 2024-05-03 Zhicheng Zhang , Yancheng Liang , Yi Wu , Fei Fang

Efficient exploration in deep cooperative multi-agent reinforcement learning (MARL) still remains challenging in complex coordination problems. In this paper, we introduce a novel Episodic Multi-agent reinforcement learning with…

Machine Learning · Computer Science 2021-11-23 Lulu Zheng , Jiarui Chen , Jianhao Wang , Jiamin He , Yujing Hu , Yingfeng Chen , Changjie Fan , Yang Gao , Chongjie Zhang

Reward design is a key component of deep reinforcement learning, yet some tasks and designer's objectives may be unnatural to define as a scalar cost function. Among the various techniques, formal methods integrated with DRL have garnered…

Artificial Intelligence · Computer Science 2023-10-24 Jiangwei Wang , Shuo Yang , Ziyan An , Songyang Han , Zhili Zhang , Rahul Mangharam , Meiyi Ma , Fei Miao

Information theoretic sensor management approaches are an ideal solution to state estimation problems when considering the optimal control of multi-agent systems, however they are too computationally intensive for large state spaces,…

Multiagent Systems · Computer Science 2021-02-02 William A. Dawson , Ruben Glatt , Edward Rusu , Braden C. Soper , Ryan A. Goldhahn

Many recent successful off-policy multi-agent reinforcement learning (MARL) algorithms for cooperative partially observable environments focus on finding factorized value functions, leading to convoluted network structures. Building on the…

Machine Learning · Computer Science 2023-10-27 Raphaël Avalos , Mathieu Reymond , Ann Nowé , Diederik M. Roijers

Cooperative multi-agent reinforcement learning (MARL) for navigation enables agents to cooperate to achieve their navigation goals. Using emergent communication, agents learn a communication protocol to coordinate and share information that…

Machine Learning · Computer Science 2024-02-13 Mohamed K. Abdelaziz , Mohammed S. Elbamby , Sumudu Samarakoon , Mehdi Bennis

Multi-agent reinforcement learning (MARL) has made significant strides in enabling coordinated behaviors among autonomous agents. However, most existing approaches assume that communication is instantaneous, reliable, and has unlimited…

Artificial Intelligence · Computer Science 2025-11-17 Zejiao Liu , Yi Li , Jiali Wang , Junqi Tu , Yitian Hong , Fangfei Li , Yang Liu , Toshiharu Sugawara , Yang Tang

The number of agents can be an effective curriculum variable for controlling the difficulty of multi-agent reinforcement learning (MARL) tasks. Existing work typically uses manually defined curricula such as linear schemes. We identify two…

Artificial Intelligence · Computer Science 2025-05-16 Wenshuai Zhao , Zhiyuan Li , Joni Pajarinen

Training a multi-agent reinforcement learning (MARL) algorithm is more challenging than training a single-agent reinforcement learning algorithm, because the result of a multi-agent task strongly depends on the complex interactions among…

Machine Learning · Computer Science 2021-01-19 Heechang Ryu , Hayong Shin , Jinkyoo Park

We consider the problem of cooperative exploration where multiple robots need to cooperatively explore an unknown region as fast as possible. Multi-agent reinforcement learning (MARL) has recently become a trending paradigm for solving this…

Robotics · Computer Science 2023-04-12 Chao Yu , Xinyi Yang , Jiaxuan Gao , Jiayu Chen , Yunfei Li , Jijia Liu , Yunfei Xiang , Ruixin Huang , Huazhong Yang , Yi Wu , Yu Wang

Deep Reinforcement Learning (DRL) and Deep Multi-agent Reinforcement Learning (MARL) have achieved significant successes across a wide range of domains, including game AI, autonomous vehicles, robotics, and so on. However, DRL and deep MARL…

Artificial Intelligence · Computer Science 2023-02-03 Jianye Hao , Tianpei Yang , Hongyao Tang , Chenjia Bai , Jinyi Liu , Zhaopeng Meng , Peng Liu , Zhen Wang