CN-121984913-A - Offshore emergency rescue multilink cooperative communication support system and method

CN121984913ACN 121984913 ACN121984913 ACN 121984913ACN-121984913-A

Abstract

The invention belongs to the technical field of communication data processing, and discloses a system and a method for supporting multi-link cooperative communication for offshore emergency rescue; the method comprises the steps of obtaining multi-link environment state data, constructing a collaborative detection algorithm based on a multi-input one-dimensional convolutional neural network, constructing a three-dimensional energy matrix according to frequency spectrum snapshot data, executing the collaborative detection algorithm on the three-dimensional energy matrix to generate a survival signal enhancement control instruction, introducing a survival service identifier into each receiving node, mapping a special survival signal data stream to a highest priority queue, generating a scheduling result by adopting a scheduling algorithm, generating a dynamic emission suppression strategy, forming a local silence window, selecting a redundancy forwarding path, distributing forward error correction coding redundancy and a retransmission strategy after the survival signal data stream is successfully accessed for the first time, executing slicing and cross-path coding distribution when the data quantity exceeds a quantity threshold, and realizing offshore emergency rescue multi-link collaborative communication guarantee.

Inventors

Bian Xuezheng
GE LINGLING
ZHU SHAOLONG
AN RAN
WANG WENJIE
ZHANG HAIWEN

Assignees

中国人民解放军海军第九七一医院

Dates

Publication Date: 20260505
Application Date: 20260206

Claims (10)

1. An offshore emergency rescue multilink cooperative communication support system, comprising: The multi-link environment sensing module is used for acquiring frequency spectrum snapshot data and link state parameters and comprehensively generating multi-link environment state data; the survival signal cooperative enhancement module is used for constructing a cooperative detection algorithm based on a multi-input one-dimensional convolutional neural network, constructing a three-dimensional energy matrix according to frequency spectrum snapshot data, executing the cooperative detection algorithm on the three-dimensional energy matrix and generating a survival signal enhanced control instruction; The service resource scheduling module is used for introducing a survival service identifier into each receiving node, mapping a special survival signal data stream to a highest priority queue, and generating a scheduling result by adopting a scheduling algorithm; The interference and suppression control module is used for generating a dynamic emission suppression strategy based on the survival signal enhancement control instruction and equipment emission power configuration in the multilink environment state data and forming a local silence window; The multi-link redundancy and fusion module is used for selecting a redundancy forwarding path and distributing forward error correction coding redundancy and retransmission strategies after the survival signal data stream is successfully accessed for the first time, and executing slicing and cross-path coding distribution when the data quantity exceeds a quantity threshold value; And the end-to-end feedback module is used for measuring the end-to-end performance according to the sending quality probe message, obtaining a real-time service quality index and carrying out interface interaction.
2. The offshore emergency rescue multilink cooperative communication security system of claim 1, wherein the method for comprehensively generating multilink environmental status data comprises: At the front end of the receiver radio frequency of each receiving node, carrying out sweep sampling on adjacent frequency bands at preset time intervals, thereby generating frequency spectrum snapshot data comprising power spectrum density and channel occupation conditions; reading transmitting power configuration, receiving signal intensity, signal to noise ratio, modulation coding mode, current service queue length and retransmission count parameter from interfaces of physical layer and MAC layer of each communication device, thereby obtaining link state parameter; And marking uniform time stamps for the frequency spectrum snapshot data and the link state parameters, and synthesizing the frequency spectrum snapshot data, the link state parameters and the uniform time stamps thereof to generate the multi-link environment state data.
3. The offshore emergency rescue multilink cooperative communication security system of claim 2, wherein the method of generating the survival signal enhancement control command comprises: the method comprises the steps of (1) aligning frequency spectrum snapshot data from a plurality of receiving nodes according to time stamps thereof to construct a multi-node-multi-frequency-multi-time slot three-dimensional energy matrix; executing a collaborative detection algorithm on the three-dimensional energy matrix, and outputting survival signal detection confidence and estimated frequency points thereof, wherein the preset survival signal characteristics comprise a personal position indication mark fixed beacon format, a smart phone emergency beacon frequency hopping mode or other preregistered survival signal characteristics; When the confidence of the survival signal detection exceeds a preset threshold, a survival signal enhancement control instruction is generated, wherein the instruction comprises an interference communication link identifier needing to be restrained, a time slot interval needing to keep silence and an idle frequency point set reserved for the survival signal suggestion.
4. The offshore emergency rescue multilink cooperative communication security system of claim 3, wherein the method for constructing the cooperative detection algorithm based on the multi-input one-dimensional convolutional neural network comprises the following steps: The collaborative detection algorithm is designed based on a trained multi-input one-dimensional convolutional neural network model; The input of the multi-input one-dimensional convolutional neural network model is a power spectrum time sequence generated by each receiving node according to the frequency spectrum snapshot data; the system comprises a plurality of parallel input branches, a cross-node feature fusion layer, a full-connection layer and a Softmax output layer, wherein the cross-node feature fusion layer is arranged on the cross-node feature fusion layer; each input branch corresponds to a receiving node and is used for receiving the power spectrum time sequence preprocessed by the node; each input branch comprises a one-dimensional convolution layer, a batch normalization layer and a nonlinear activation layer which are connected in sequence; The cross-node feature fusion layer is used for splicing one-dimensional feature vectors output by each input branch, and then sequentially sending the output of the one-dimensional feature vectors to the full-connection layer and the Softmax output layer; Softmax outputs two results, including the probability of existence of the survival signal and the detection confidence of the survival signal corresponding to the probability; Training a multi-input one-dimensional convolutional neural network model by using a predefined sample set, wherein the sample set comprises samples collected in an environment simulating offshore multipath fading and noise, namely a personal position-indicating signal sample, a smart phone emergency beacon sample and a background interference sample; The trained model is deployed to edge computing nodes on the receiving node.
5. The offshore emergency rescue multilink cooperative communication security system of claim 4, wherein the method for introducing a survival service identifier in each receiving node, mapping a dedicated survival signal data stream to a highest priority queue, and generating a scheduling result by adopting a scheduling algorithm comprises: Introducing a survival service identifier into a protocol stack of each receiving node, and immediately marking the survival service identifier as a special survival signal data stream at a network layer and a transmission layer when a certain access request confirms that the survival signal is a survival signal; Constructing a multi-level priority queue which is distinguished according to the service type in the MAC layer, and mapping the survival signal data stream to the highest priority queue in the multi-level priority queue; according to the scheduling algorithm, the transmission opportunities are distributed among different communication links for generating signal data streams, the coding redundancy is determined, and a scheduling result comprising the transmission opportunities and the coding redundancy distribution result is generated.
6. The offshore emergency rescue multilink cooperative communication security system of claim 5, wherein the method for generating a dynamic transmission suppression strategy and forming a local silence window based on the survival signal enhancement control command and the device transmission power configuration in the multilink environment state data comprises: firstly, identifying high-power communication equipment causing co-frequency or adjacent frequency interference to a target survival signal frequency point based on a survival signal enhancement control instruction and equipment transmitting power configuration in multi-link environment state data; Secondly, combining the service type currently carried by the high-power communication equipment to generate a dynamic emission suppression strategy, wherein the dynamic emission suppression strategy comprises one or more operations of reducing emission power, converting into an idle state in a time slot interval appointed by the survival signal enhancement control instruction or transferring the service to an idle frequency point suggested by the survival signal enhancement control instruction on the premise of ensuring the basic connectivity of the key command service; Finally, issuing a dynamic emission suppression strategy to the corresponding high-power communication equipment through a standardized remote equipment control interface; Therefore, the high-power communication equipment is controlled to form a local silence window on the key time period and the frequency point of the survival signal transmission.
7. The offshore emergency rescue multilink cooperative communication security system of claim 6, wherein the method for selecting a redundant forwarding path and allocating a forward error correction coding redundancy and a retransmission policy and performing fragmentation and cross-path coding distribution when the data amount exceeds a number threshold comprises: Immediately selecting at least two communication links as redundant forwarding paths according to the multi-link environment state data after the survival signal data stream is successfully accessed to any communication link for the first time; distributing differentiated forward error correction coding redundancy and a data packet retransmission strategy for each selected redundancy forwarding path; The survival signal data packets arriving at the emergency command terminal through each redundant forwarding path are subjected to duplication removal and time sequence recombination according to the serial numbers and the time stamps; when the data volume of the transmitted survival signal data stream exceeds a preset quantity threshold value, slicing the data stream; And carrying out cross-path coding and distribution on the fragmented data on a plurality of redundant forwarding paths.
8. The offshore emergency rescue multilink cooperative communication security system of claim 7, wherein the method for obtaining the real-time quality of service index according to the end-to-end performance of the transmission quality probe message measurement comprises the following steps: firstly, periodically embedding and transmitting a quality probe message on each communication link carrying a survival signal data stream; actively measuring end-to-end round trip delay, jitter and packet loss rate from a sending node to an emergency command terminal through a quality probe message; secondly, gathering return data of the quality probe message on each communication link; counting the real-time transmission quantity and successful receiving quantity of the actual transmission survival signal data packets, and carrying out fusion calculation with the return data to obtain the real-time service quality index when each communication link bears the survival signal data stream; Dynamically adjusting the scheduling weight and the redundancy strategy according to the real-time service quality index; and when the real-time service quality index is lower than a preset quality threshold, performing emission suppression on the identified interference source.
9. The offshore emergency rescue multilink cooperative communication security system of claim 8, wherein the interface interaction method comprises: based on the multilink environment state data, dynamically displaying the real-time state of each receiving node and the communication link used by each receiving node in a network topology diagram form on a display interface of the emergency command terminal; When a new survival signal is detected and the redundant forwarding and fusion processing of the survival signal data stream is completed, marking an actual transmission path and a candidate redundant forwarding path of the survival signal data stream with a highlight path in a network topology diagram; based on the issued control instruction, synchronously prompting the currently effective silent window range on the display interface; When the service quality index of the survival signal data stream is continuously lower than a preset quality threshold, automatically generating a control strategy suggestion, wherein the control strategy suggestion comprises one or more operation instructions for improving the transmission quality of the survival signal data stream, such as increasing the link bandwidth of a satellite terminal, temporarily shutting down part of non-key video backhaul service, or adjusting the relative positions of a command boat, an assault boat and a helicopter; and presenting the control strategy advice on a display interface of the emergency command terminal.
10. An offshore emergency rescue multilink cooperative communication security method for implementing the offshore emergency rescue multilink cooperative communication security system as claimed in any one of claims 1 to 9, comprising: S1, acquiring frequency spectrum snapshot data and link state parameters, and marking uniform time stamps on the frequency spectrum snapshot data and the link state parameters to generate multi-link environment state data; S2, designing a collaborative detection algorithm based on a multi-input one-dimensional convolutional neural network model; S3, aligning the frequency spectrum snapshot data of a plurality of receiving nodes according to time stamps to construct a three-dimensional energy matrix, executing a collaborative detection algorithm on the three-dimensional energy matrix, outputting the detection confidence level of the survival signal and the estimated frequency point, and generating a survival signal enhancement control instruction when the confidence level exceeds a threshold; S4, marking the confirmed survival signal as a special survival signal data stream, and mapping the special survival signal data stream to a highest priority queue; S5, identifying high-power communication equipment possibly causing interference, generating and launching a state emission suppression strategy, and thus forming a local silence window; S6, selecting a redundant forwarding path for generating a signal data stream, and performing de-duplication and time sequence recombination on the transmitted data packet; S7, periodically sending a quality probe message to further obtain a real-time service quality index; And S8, dynamically displaying the network topology on the command interface and performing interface interaction.

Description

Offshore emergency rescue multilink cooperative communication support system and method Technical Field The invention relates to the technical field of communication data processing, in particular to a system and a method for supporting multi-link cooperative communication for offshore emergency rescue. Background In the offshore emergency rescue action, reliable and efficient short-range communication is a key for coordinating multi-party strength, positioning a difficult person and ensuring the success of rescue. However, the communication guarantee in this scenario faces serious challenges of coexistence of extremely severe physical environments and complex heterogeneous networks, resulting in abnormal difficulties in reliable and rapid transmission of survival signals for the difficult individuals. Modern offshore emergency rescue generally involves multiple units of collaborative operations, such as command boats, assault boats, helicopters, and various types of intelligent rescue equipment. These units are typically equipped with communication systems of varying standards, parameters, such as maritime VHF networks, broadband ad hoc networks, LTE emergency micro base stations, satellite terminals, etc. The heterogeneous wireless links temporarily established by different units may overlap or be adjacent to each other in their operating frequency bands, and co-channel interference or adjacent channel interference is easily generated in a limited short-range space. Particularly, the transmission of high-power equipment (such as a shipborne radio station) can generate far-near effect suppression on low-power difficult person terminals (such as personal position marks, smart phones and smart bracelets), and further drown the low-power distress signals. The survival signal has been severely degraded by environmental factors during physical transmission, and even if the signal is coming to the touch to a certain link, the link may face inter-link resource contention and congestion because the link may be carrying high priority traffic (e.g., directing voice, video backhaul) of the unit to which it belongs. Meanwhile, the link is exposed to severe environment and common-frequency interference from other unit links, the quality continuously fluctuates, and transmission interruption is extremely easy to cause. In view of the above, an offshore emergency rescue multilink cooperative communication support system and method are designed. Disclosure of Invention In order to overcome the defects in the prior art and achieve the purposes, the invention provides the technical scheme that the offshore emergency rescue multilink cooperative communication guaranteeing method comprises the following steps: The multi-link environment sensing module is used for acquiring frequency spectrum snapshot data and link state parameters and comprehensively generating multi-link environment state data; the survival signal cooperative enhancement module is used for constructing a cooperative detection algorithm based on a multi-input one-dimensional convolutional neural network, constructing a three-dimensional energy matrix according to frequency spectrum snapshot data, executing the cooperative detection algorithm on the three-dimensional energy matrix and generating a survival signal enhanced control instruction; The service resource scheduling module is used for introducing a survival service identifier into each receiving node, mapping a special survival signal data stream to a highest priority queue, and generating a scheduling result by adopting a scheduling algorithm; The interference and suppression control module is used for generating a dynamic emission suppression strategy based on the survival signal enhancement control instruction and equipment emission power configuration in the multilink environment state data and forming a local silence window; The multi-link redundancy and fusion module is used for selecting a redundancy forwarding path and distributing forward error correction coding redundancy and retransmission strategies after the survival signal data stream is successfully accessed for the first time, and executing slicing and cross-path coding distribution when the data quantity exceeds a quantity threshold value; And the end-to-end feedback module is used for measuring the end-to-end performance according to the sending quality probe message, obtaining a real-time service quality index and carrying out interface interaction. Preferably, the method for comprehensively generating the multi-link environment state data comprises the following steps: At the front end of the receiver radio frequency of each receiving node, carrying out sweep sampling on adjacent frequency bands at preset time intervals, thereby generating frequency spectrum snapshot data comprising power spectrum density and channel occupation conditions; reading transmitting power configuration, receiving signal intensity, signal to noise ratio, m