4 results about "Underwater acoustic network" patented technology

This invention discloses a data-driven method for monitoring marine phytoplankton abundance using underwater acoustic networks. The method includes: constructing and training a multi-level spatiotemporal feature ensemble model based on historical marine phytoplankton abundance and corresponding marine environmental data to determine the optimal spatial location and monitoring time window of the underwater acoustic network nodes; constructing a teacher model for channel prediction, including a multi-layer cascaded structure and residual modules, and compressing the teacher model into a student model using spatiotemporal knowledge distillation; training the student model to achieve real-time channel state prediction at the underwater acoustic network nodes; matching suitable underwater acoustic communication devices and seasonal optimal routing strategies to each underwater acoustic network node based on the optimal spatial location and real-time predicted channel state, and performing adaptive modulation and coding at the link level, while simultaneously monitoring phytoplankton abundance using the underwater acoustic network. This invention can improve data throughput and prediction accuracy under strict energy consumption constraints.

This application relates to a method, system, and medium for simulating the physical layer of an underwater acoustic network in a network simulator. It includes: a mirror event scheduler monitoring transmission events at the physical layer; when any node triggers a transmission event, the mirror event scheduler adds the transmission event to a preset micro-batch buffer for buffering; when preset conditions are met, the mirror event scheduler performs micro-batch aggregation processing on all current transmission events in the micro-batch buffer; the mirror event scheduler generates a transmission signal based on the micro-batch aggregation result; the mirror event scheduler generates an uplink parameter file based on the transmission signal and sends it to the channel simulation end; the channel simulation end determines the target channel impulse response; the channel simulation end generates a downlink parameter file based on the target channel impulse response and the transmission signal and returns it to the network simulation end; the mirror event scheduler in the network simulation end processes the corresponding reception events based on the downlink parameter file. This application can avoid the interference underestimation and collision misjudgment caused by traditional packet-by-packet processing.

The application provides a position service method for an underwater acoustic network VBF routing protocol, which realizes local node position coordinate calculation through a distributed ranging and three-side positioning method and designs a deviation elimination mechanism, and finally obtains absolute coordinates of all nodes in the network through network transmission of node position information, fusion and conversion of multiple coordinate systems. The method does not need to deploy positioning beacons and GPS signals, and realizes self-organization of positioning of all nodes in the network, can provide position service for the underwater acoustic network VBF routing protocol, improves routing efficiency and reliability, and has high engineering practical value.

The application relates to an implementation method of a heat value-oriented underwater acoustic positioning-free routing method for cavity avoidance, and relates to underwater communication. The method utilizes the heat transfer law in nature, constructs a virtual heat field in an underwater acoustic sensor network, and realizes efficient guidance and stable forwarding of underwater acoustic data packets. A corresponding heat value variable is generated by fusing node hop number, node residual energy and node depth, a converging node located on the water surface is taken as a network heat source, heat value signaling packets are periodically broadcasted, and a dynamic self-adaptive virtual heat field is constructed; after each node receives the heat value signaling packets, the heat value of the node is updated, and the node is adapted to topological changes. When data is forwarded, a neighbor node with the highest heat value is selected as a relay node, a concurrent mechanism is adopted for efficient forwarding, and energy utilization efficiency and topological adaptability are improved. The virtual heat field can provide stable and adjustable multi-path guidance capability. In an underwater acoustic environment with sparse nodes or unstable topology, the heat value-driven data forwarding strategy can effectively avoid cavities, and the robustness of underwater acoustic routing and the connectivity of the underwater acoustic network are improved.