12 results about "Underwater network" patented technology

The invention discloses an air-sea cross-domain integrated sensing network and a construction method thereof, relates to the technical field of communication, and adopts an underwater communication neighbor sensing protocol to realize sensing between underwater nodes through the underwater-oriented high-reliability and low-overhead underwater communication neighbor sensing protocol. Secondly, sensing between air-sea cross-domain nodes is realized through self-defined protocol integration on an overwater wireless communication platform, and the shortest link can be adaptively selected for data transmission through overwater topology sensing to underwater topology sensing, so that a traditional air-sea information island is broken through, deep fusion and sharing of cross-domain data are realized, and the data transmission efficiency is improved. A global coverage and real-time cooperation intelligent sensing system is constructed, and the problem that the existing air network, the water surface network and the underwater network are independent of one another, and integrated network sensing of the water target to the underwater target cannot be achieved is solved.

The invention provides a time-space structured sparse optical coding deepwater heterogeneous network data synchronization method and system, and the method comprises the steps: carrying out the sparse decomposition of the time sequence clock deviation data of each current underwater node at a transmitting end device of a deepwater heterogeneous network based on a trained over-complete dictionary, and obtaining an original sparse vector; converting the dynamic compression observation data corresponding to the original sparse vector into an optical signal, and transmitting the optical signal to a receiving end device of the deepwater heterogeneous network by a transmitting end device through an umbilical cable; demodulating the optical signal into an observation vector through receiving end equipment, inputting the observation vector into the trained deep expansion network model, and outputting a reconstructed sparse vector by the deep expansion network model; and recovering the reconstructed sparse vector into a clock skew signal through the over-complete dictionary, and generating a clock synchronization calibration instruction to realize data synchronization of the corresponding underwater node. According to the invention, the problems of high bandwidth occupation, low signal ratio and poor reconstruction time efficiency existing in the underwater network time synchronization technology can be solved.

The invention discloses an underwater AUV (Autonomous Underwater Vehicle) service caching and switch state switching method based on a D3QN (Digital 3QN). The method comprises the following steps: firstly, for an ocean network formed by a water surface buoy node and an AUV, establishing an AUV service cache state and dormancy / activation state coupling control model; then, through consistent binding of a target switch state and a service cache write-in action, dormancy isolation constraint and a dormancy cache freezing rule, a feasible action mask meeting cache capacity constraint and anti-repeated write-in constraint is constructed; the method comprises the following steps of: firstly, constructing a comprehensive cost function according to cache update time overhead, write-in energy consumption, switch state switching cost and invalid activation penalty, and finally, solving in a legal action subspace by using D3QN, and outputting an AUV service cache and switch state switching control strategy. According to the invention, AUV service cache updating and switch state switching under the dynamic load can be effectively realized, and underwater network energy consumption and service cache updating delay are reduced.

The application provides a kind of spatio-temporal structure sparse light coding deep water heterogeneous network data synchronization method and system, including based on the overcomplete dictionary trained, the time sequence clock deviation data of each underwater node in the sending terminal equipment of deep water heterogeneous network is sparsely decomposed, and the original sparse vector is obtained;After the dynamic compressed observation data corresponding to the original sparse vector is converted into optical signal, it is transmitted to the receiving terminal equipment of deep water heterogeneous network by umbilical cable by sending terminal equipment;After the optical signal is demodulated into observation vector by receiving terminal equipment, it is input into the trained deep unfolding network model, and the reconstructed sparse vector is output by deep unfolding network model;The reconstructed sparse vector is recovered into clock deviation signal by overcomplete dictionary, and clock synchronization calibration instruction is generated, to realize the data synchronization of corresponding underwater node.The application can solve the problems of high bandwidth occupation, low signal ratio and poor reconstruction timeliness in underwater network time synchronization technology.

The application provides an acoustic positioning and communication integrated method for underwater multi-platform sensors, which comprises three working modes of a same set of underwater acoustic hardware circuit and transducer: positioning and communication integrated mode, single positioning mode and single communication mode; when the working mode is the positioning and communication integrated mode, a spread spectrum code is directly used on the I branch, and the spread spectrum code is used to modulate communication information in the BPSK mode on the Q branch; after the two-way information spread spectrum, the two-way information is synthesized and modulated to the carrier; when the working mode is the single positioning mode, the spread spectrum code is directly used to modulate the carrier signal in the BPSK mode; when the working mode is the single communication mode, the spread spectrum code is used to modulate the communication information in the BPSK mode, and then the carrier signal is modulated in the BPSK mode; finally, the working mode is judged by the judgment criterion, the single or integrated service function of the underwater acoustic positioning and communication is realized, and technical support is provided for the development and progress of the underwater network information system.

This invention discloses a method for underwater AUV service cache and on / off state switching based on D3QN. First, for an ocean network composed of surface buoy nodes and AUVs, a coupled control model of AUV service cache state and dormant / active state is established. Next, by binding the target on / off state with the consistency of service cache write actions, implementing dormant isolation constraints, and setting dormant cache freezing rules, a feasible action mask satisfying cache capacity constraints and anti-duplicate write constraints is constructed. A comprehensive cost function is then built using cache update time overhead, write energy consumption, on / off state switching cost, and invalid activation penalty. Finally, D3QN is used to solve this function within the legal action subspace, outputting the AUV service cache and on / off state switching control strategy. This invention can effectively realize AUV service cache updates and on / off state switching under dynamic loads, reducing underwater network energy consumption and service cache update latency.

This invention provides an underwater communication transmission device based on optical fiber, comprising a surface communication device and an underwater communication device, connected by optical fiber. The surface communication device includes a remote communication module, a first optical fiber transceiver module, a data conversion module, and a first power module. The underwater communication module includes a second optical fiber transceiver module, a signal conversion module, and a second power module. The surface communication device is mounted on a floating base. The floating base includes a supporting component, around which retractable cantilever arms are arranged. The cantilever arms slide against the supporting component, and a spring and a locking mechanism are provided between the cantilever arms and the supporting component. A buoyancy component is provided at one end of the cantilever arms. This invention achieves long-distance transmission between underwater network equipment and ground base stations through underwater optical fiber transmission and surface electromagnetic communication, effectively improving the underwater signal transmission speed.

The invention relates to the technical field of underwater network resource management, and discloses a resource scheduling method, device, equipment and medium for an underwater acoustic sensor network, and an underwater acoustic communication node obtains communication environment state information, channel state information and node state information. And analyzing the acquired information according to a decision network matched with the service demand to determine a link scheduling strategy comprising a link scheduling result, transmission power and a sending rate. And when the link scheduling result is that the data is sent at the current time slot, inserting the queue semantic information of the own node into the packet header of the data packet to be sent, and transmitting the data packet to be sent to the destination node according to the transmission power and the sending rate. And by carrying the queue semantic information, other nodes can conveniently know the load condition of the node. By fully utilizing the sensing capacity of the underwater acoustic communication nodes, the joint adjustment of link scheduling, transmission power and transmission rate is realized, the utilization rate of underwater inherent resources is improved, and the performance optimization of the underwater acoustic sensing network is realized.

The invention relates to an underwater network resource allocation method and device, equipment and a storage medium, and the method comprises the steps: carrying out the priority marking of a collected original data package, and obtaining a priority marking data package; obtaining a channel state parameter, and determining the number of redundant packets based on the target priority of the priority marking data packet and the channel state parameter; coding processing is carried out on the priority marking data packets to generate coded data packets, and the coded data packets comprise the priority marking data packets and redundant packets with the number equal to the number of the redundant packets; acquiring a neighbor node state corresponding to the coded data packet, and performing cross-layer resource scheduling based on the target priority, the neighbor node state and the channel state parameter to generate a scheduling instruction; according to the scheduling instruction, carrying out physical layer signal modulation on the coded data packet and transmitting the coded data packet; compared with the prior art, the technical scheme of the invention can comprehensively improve the transmission reliability of the underwater network, the resource utilization rate and the service life of the whole network.

The application discloses a resource management method, system and device of an underwater acoustic sensor network and a medium, and is applied to the field of underwater network resource management. The application needs to judge whether the topology structure of the underwater acoustic sensor network is changed. If the topology structure is changed, the sending power is calculated according to the underwater acoustic communication model, and information with the sending power is sent. If the topology structure is not changed, it is judged whether feedback information from a corresponding receiving node is received. If the feedback information is not received, the step according to the underwater acoustic communication model is returned. If the feedback information is received, information with the sending power is sent through the corresponding relationship between the feedback information and the sending power. The application couples two power control methods, solves the challenge brought by unstable underwater acoustic communication channel quality to underwater resource management, and considers an actual underwater acoustic channel state, node limited energy and a resource management method of underwater acoustic sensor network application demand, reasonably utilizes limited energy of the underwater node, meets the communication quality requirement and prolongs the network survival time.

An underwater network relay device disclosed by the present invention comprises a cylinder, two ends of the cylinder are detachably connected with a first end cover and a second end cover respectively, a support between the first end cover and the second end cover is provided with a circuit board, the support is fixed with a connecting plate through a screw, and the connecting plate is fixed with the first end cover through a screw. The material density of the connecting plate is smaller than that of the first end cover, a first socket and a second socket are fixed to the first end cover and the second end cover respectively, a hoop is detachably connected to the barrel, a clamp is detachably connected to the hoop and comprises a first clamping plate and a second clamping plate which are detachably connected, and a clamping groove is formed between the first clamping plate and the second clamping plate. Compared with the prior art, the first end cover, the second end cover and the connecting plate which are detachably arranged facilitate assembly of components in the barrel and later maintenance, and the hoop and the clamp which are detachably connected facilitate deployment of the barrel. The whole structure is simple, assembling is easy, rapid disassembling and assembling can be achieved, and cost input can be effectively reduced.

A method for self-evolution of underwater network structure based on perception data conflict driving, each underwater autonomous vehicle node collects multiple hydrological parameters in a sampling period; the distribution difference between any two underwater autonomous vehicle nodes is quantified based on entropy difference function; the weighted sum of the entropy differences of all hydrological parameters constitutes the total perception conflict degree; the conflict records in the past T sampling period are maintained by using a sliding window mechanism, the mean and standard deviation of the total perception conflict degree are used to construct a dynamic threshold; an edge is established between all underwater autonomous vehicle node pairs that satisfy the condition that the total perception conflict degree is greater than or equal to the dynamic threshold, and a conflict graph is constructed; the control node performs a connected component extraction operation on the conflict graph, and filters out high conflict areas that satisfy the following conditions: the high conflict areas are optimized by reinforcement learning, and the self-evolution of the underwater network structure is completed; thereby significantly improving the cooperation and communication stability of the underwater network in the Yellow River Basin under the environment of high disturbance and high non-uniform deployment.