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Multiagent reinforcement learning (MARL) is commonly considered to suffer from non-stationary environments and exponentially increasing policy space. It would be even more challenging when rewards are sparse and delayed over long…

Finding the optimal signal timing strategy is a difficult task for the problem of large-scale traffic signal control (TSC). Multi-Agent Reinforcement Learning (MARL) is a promising method to solve this problem. However, there is still room…

Machine Learning · Computer Science 2021-09-14 Xiaoqiang Wang , Liangjun Ke , Zhimin Qiao , Xinghua Chai

Multi-agent systems have evolved into practical LLM-driven collaborators for many applications, gaining robustness from diversity and cross-checking. However, multi-agent RL (MARL) training is resource-intensive and unstable: co-adapting…

Recently, deep multiagent reinforcement learning (MARL) has become a highly active research area as many real-world problems can be inherently viewed as multiagent systems. A particularly interesting and widely applicable class of problems…

Multiagent Systems · Computer Science 2020-02-11 Yaodong Yang , Jianye Hao , Guangyong Chen , Hongyao Tang , Yingfeng Chen , Yujing Hu , Changjie Fan , Zhongyu Wei

We consider the problem of robust multi-agent reinforcement learning (MARL) for cooperative communication and coordination tasks. MARL agents, mainly those trained in a centralized way, can be brittle because they can adopt policies that…

Multiagent Systems · Computer Science 2020-12-16 T. van der Heiden , C. Salge , E. Gavves , H. van Hoof

For Industry 4.0 Revolution, cooperative autonomous mobility systems are widely used based on multi-agent reinforcement learning (MARL). However, the MARL-based algorithms suffer from huge parameter utilization and convergence difficulties…

Multiagent Systems · Computer Science 2023-08-04 Soohyun Park , Jae Pyoung Kim , Chanyoung Park , Soyi Jung , Joongheon Kim

Recent advances in multi-agent reinforcement learning (MARL) have achieved super-human performance in games like Quake 3 and Dota 2. Unfortunately, these techniques require orders-of-magnitude more training rounds than humans and don't…

Machine Learning · Computer Science 2020-10-19 Tianjun Zhang , Huazhe Xu , Xiaolong Wang , Yi Wu , Kurt Keutzer , Joseph E. Gonzalez , Yuandong Tian

Reinforcement learning (RL) is one of the most practical ways to learn from real-life use-cases. Motivated from the cognitive methods used by humans makes it a widely acceptable strategy in the field of artificial intelligence. Most of the…

Artificial Intelligence · Computer Science 2026-04-14 Abhishek Sawaika , Samuel Yen-Chi Chen , Udaya Parampalli , Rajkumar Buyya

We study the problem of online multi-agent reinforcement learning (MARL) in environments with sparse rewards, where reward feedback is not provided at each interaction but only revealed at the end of a trajectory. This setting, though…

Machine Learning · Computer Science 2025-09-29 The Viet Bui , Tien Mai , Hong Thanh Nguyen

Many advances in cooperative multi-agent reinforcement learning (MARL) are based on two common design principles: value decomposition and parameter sharing. A typical MARL algorithm of this fashion decomposes a centralized Q-function into…

Artificial Intelligence · Computer Science 2022-08-09 Wei Fu , Chao Yu , Zelai Xu , Jiaqi Yang , Yi Wu

This paper studies a distributed policy gradient in collaborative multi-agent reinforcement learning (MARL), where agents over a communication network aim to find the optimal policy to maximize the average of all agents' local returns. Due…

Multiagent Systems · Computer Science 2022-12-06 Xiaoxiao Zhao , Jinlong Lei , Li Li , Jie Chen

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

Recent research endeavours have theoretically shown the beneficial effect of cooperation in multi-agent reinforcement learning (MARL). In a setting involving $N$ agents, this beneficial effect usually comes in the form of an $N$-fold linear…

Multiagent Systems · Computer Science 2024-07-31 Nicolò Dal Fabbro , Arman Adibi , Aritra Mitra , George J. Pappas

This paper considers the multi-agent reinforcement learning (MARL) problem for a networked (peer-to-peer) system in the presence of Byzantine agents. We build on an existing distributed $Q$-learning algorithm, and allow certain agents in…

Systems and Control · Electrical Eng. & Systems 2021-04-08 Yijing Xie , Shaoshuai Mou , Shreyas Sundaram

Q-learning with neural network function approximation (neural Q-learning for short) is among the most prevalent deep reinforcement learning algorithms. Despite its empirical success, the non-asymptotic convergence rate of neural Q-learning…

Machine Learning · Computer Science 2020-03-05 Pan Xu , Quanquan Gu

This paper studies the networked multi-agent reinforcement learning (NMARL) problem, where the objective of agents is to collaboratively maximize the discounted average cumulative rewards. Different from the existing methods that suffer…

Multiagent Systems · Computer Science 2025-06-02 Pengcheng Dai , Yuanqiu Mo , Wenwu Yu , Wei Ren

Collaboration is a key challenge in distributed multi-agent reinforcement learning (MARL) environments. Learning frameworks for these decentralized systems must weigh the benefits of explicit player coordination against the communication…

Quantum Physics · Physics 2025-02-21 Alexander DeRieux , Walid Saad

Sparse and delayed rewards pose a challenge to single agent reinforcement learning. This challenge is amplified in multi-agent reinforcement learning (MARL) where credit assignment of these rewards needs to happen not only across time, but…

Machine Learning · Computer Science 2022-11-01 Jennifer She , Jayesh K. Gupta , Mykel J. Kochenderfer

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

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