This article presents the first dedicated and comprehensive survey of DRL for Open AI-RAN, and reviews the foundations of model-free, model-based, offline, safe, multi-agent, federated, and transfer learning, and provides an O-RAN-aware framework for formulating RAN control problems through states, observations, actions, rewards, constraints, and temporal structure.
Jie Lu, Peihao Yan, Qijun Wang et al.· 0 citations