Applications of Deep Reinforcement Learning in Communications and Networking: A Survey
Nguyen Cong LuongDinh Thai HoangShimin GongDusit NiyatoPing WangYing-Chang LiangDong In Kim
Surveys the application of deep reinforcement learning across modern communication networks, providing a structured analysis of how advanced models solve complex decision-making problems in dynamic spectrum access, wireless caching, traffic routing, and network security.
Modern wireless communication systems, such as cellular networks, the Internet of Things, and autonomous drone networks, are increasingly decentralized, dynamic, and complex. Network entities like mobile devices, base stations, and sensors must make real-time decisions regarding spectrum access, data transmission rates, content caching, computation offloading, and cybersecurity defenses without complete knowledge of their operating environment. While traditional reinforcement learning allows devices to learn optimal behaviors through trial and error, it struggles with slow convergence and computational unmanageability in large-scale systems with massive decision spaces. This article set out to evaluate how deep reinforcement learning—which combines reinforcement learning with deep neural networks—can overcome these scalability challenges and optimize autonomous decision-making across diverse networking applications.
The article conducts a comprehensive review and taxonomy of deep reinforcement learning applications across communications and networking, examining algorithmic frameworks such as deep Q-learning, double deep Q-networks, dueling architectures, and actor-critic models. It synthesizes findings from extensive studies, simulations, and real-world datasets across cellular infrastructure, cognitive radio, heterogeneous networks, vehicular networks, and satellite systems. Through comparative analysis, the article evaluates how these techniques solve complex sequential decision processes and multi-agent game-theoretic formulations in uncertain, time-varying environments without requiring complete channel models or centralized coordination.
The findings demonstrate that deep reinforcement learning consistently achieves near-optimal performance across critical networking domains while drastically accelerating learning speed compared to traditional reinforcement learning. In dynamic spectrum access and user association, deep learning algorithms increased network throughput by 24% to 28% over standard methods and achieved up to double the throughput of traditional random access protocols. For adaptive video streaming and traffic rate control, deep reinforcement learning architectures improved user Quality of Experience by up to 25% and reduced video freezing by roughly 33%. In mobile edge computing and wireless caching, deep learning strategies improved cache hit rates and cut operational delay and energy costs by up to 55% compared to static allocation policies. In network security and anti-jamming scenarios, deep reinforcement learning converged up to 83% faster than standard methods, cutting transmission error rates by approximately 47% and enhancing communication secrecy.
These findings indicate that integrating deep neural networks into autonomous decision-making provides a viable pathway toward self-organizing next-generation communication architectures. By enabling decentralized network entities to learn optimal policies locally with minimal information exchange, deep reinforcement learning reduces communication overhead, enhances operational robustness, and lowers latency. For network operators and technology providers, this translates into reduced infrastructure energy costs, improved spectrum efficiency, and superior service reliability without the need to solve computationally prohibitive optimization problems in real time.
Decision-makers and network engineers should consider deploying deep reinforcement learning incrementally, prioritizing high-impact applications such as proactive edge caching and adaptive video bitrate control where performance gains are substantial. Organizations should establish hybrid architectures where computationally intensive training occurs on centralized or edge servers while local agents execute low-complexity inference. However, stakeholders should remain cautious: deep reinforcement learning models often depend heavily on the quality and stability of training data, demand significant hardware resources, and can experience instability in rapidly shifting environments. Further validation through large-scale physical testbeds and real-world pilot deployments is recommended before deploying fully autonomous control mechanisms in mission-critical networks.
- Paper: Deep Reinforcement Learning: An Overview, Yuxi Li (2017). Provides a comprehensive overview of fundamental deep reinforcement learning models and stabilization techniques that form the theoretical baseline of the networking survey.
- Paper: Human-level control through deep reinforcement learning, Volodymyr Mnih et al. (2015). Introduces Deep Q-Networks (DQN) with experience replay and target networks, which serves as a core algorithmic building block referenced throughout the survey's networking applications.
- Paper: Continuous control with deep reinforcement learning, T. Lillicrap et al. (2015). Establishes the Deep Deterministic Policy Gradient (DDPG) framework essential for continuous-action resource management and power control problems examined in the survey.
- Paper: Multi-Agent Actor-Critic for Mixed Cooperative-Competitive Environments, Ryan Lowe et al. (2017). Develops multi-agent deep reinforcement learning using centralized training with decentralized execution, which directly underpins decentralized networking and multi-UAV coordination techniques.
- Paper: Learning to Communicate with Deep Multi-Agent Reinforcement Learning, Jakob N. Foerster et al. (2016). Presents differentiable inter-agent communication protocols in multi-agent RL, establishing the foundations for learning cooperative networking behaviors.
- Paper: Deep Reinforcement Learning with Double Q-learning, Hado van Hasselt et al. (2016). Formulates Double DQN to mitigate action-value overestimations, an algorithmic enhancement widely adopted in wireless optimization policies.
- Paper: Deep Recurrent Q-Learning for Partially Observable MDPs, Matthew Hausknecht et al. (2015). Introduces recurrent deep Q-learning for partially observable environments, providing the key model used to handle dynamic and incomplete state information in wireless channels.
- Paper: Policy Gradient Methods for Reinforcement Learning with Function Approximation, Richard S. Sutton et al. (1999). Derives the fundamental policy gradient theorem under function approximation that enables direct policy optimization methods in complex network control.
- Paper: Edge Intelligence: Paving the Last Mile of Artificial Intelligence With Edge Computing, Zhi Zhou et al. (2019). Expands on edge-based intelligence architectures by investigating how decentralized AI and edge computing collaborate beyond core reinforcement learning algorithms.
- Paper: Intelligent Reflecting Surface-Aided Wireless Communications: A Tutorial, Qingqing Wu et al. (2020). Explores intelligent reflecting surface-aided communications as a physical-layer reconfiguration paradigm where deep reinforcement learning control strategies are directly applied.
- Paper: QMIX: Monotonic Value Function Factorisation for Deep Multi-Agent Reinforcement Learning, Tabish Rashid et al. (2018). Extends multi-agent reinforcement learning via monotonic value function factorisation, advancing cooperative decision-making in decentralized network environments.
- Paper: Offline Reinforcement Learning: Tutorial, Review, and Perspectives on Open Problems, Sergey Levine et al. (2020). Investigates offline reinforcement learning from static logged datasets, addressing key safety and data-efficiency challenges highlighted in future networking research directions.
- Paper: Federated Learning: Challenges, Methods, and Future Directions, Tian Li et al. (2019). Surveys the systems and communication challenges of federated learning, extending the survey's discussion on distributed network optimization and localized intelligence.
