Abstract:At present, the marine emergency communication mainly focuses on the surface part, less on the underwater part, which cannot meet the underwater emergency needs. Therefore, the underwater emergency communication is discussed. Firstly, the possible application scenarios are analyzed, and the basic requirements and performance measurements are given. Secondly, the architecture of the system is discussed from the aspects of network topology, working mechanism and node types. Then, the key technologies are described, including multi-mode communication and function integration of nodes, rapid mobile deployment of network, rapid switching of network modes, and joint integration of underwater and sea surface. Finally, the paper introduces the machine learning and meta learning methods that can be used in intelligence, and discusses the ideas of intelligent underwater emergency communication.