Satellite-ground integrated global marine safety information broadcasting system and method

Abstract

The invention discloses a satellite-ground integrated global marine safety information broadcasting system and method, and belongs to the technical field of navigation guarantee. The system comprises an NAVTEX, an Inmarsat EGC, an AIS / VDES, a Beidou short message service system and a shore-based coordination system, the first four systems are used as independent broadcasting systems to meet the whole ship type and whole sea area coverage of the marine safety information, and the shore-based coordination system has the functions of source information acquisition, data processing, broadcasting strategy making and broadcasting effectiveness evaluation, so that classification and priority division of the marine safety information are realized; and on the basis, a broadcasting strategy is further formulated and broadcasting effectiveness is evaluated. According to the invention, coordinated docking of each broadcasting system can be realized, autonomous controllable broadcasting of whole ship type and whole sea area coverage of marine safety information is ensured, centralized management, processing and broadcasting of the marine safety information are realized, efficient, accurate and reliable marine safety information is provided, and the safety and efficiency of ship marine navigation are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of maritime security, and particularly relates to a space-ground integrated global maritime safety information dissemination system and method. Background Art

[0002] Maritime Safety Information (MSI) is the navigation warnings, weather forecasts, warnings, and other safety-related emergency information broadcast to ships. It is an important part of the Global Maritime Distress and Safety System (GMDSS) established by the International Maritime Organization to effectively execute search and rescue missions and ensure the safety of life and property at sea. The dissemination of maritime safety information is crucial for the safety of ship navigation, and is a key link for national maritime departments to fulfill international conventions and the obligations of coastal states, directly related to national maritime management and the safety of ship navigation.

[0003] In the current maritime safety information dissemination system, the electronic systems written into the GMDSS for disseminating and receiving maritime safety information mainly include NAVTEX and Inmarsat EGC. China has established 6 English NAVTEX broadcast stations and 7 Chinese NAVTEX broadcast stations, and also has an EGC safety network system in Beijing. Through these facilities, China has initially constructed a complete maritime safety information dissemination system.

[0004] However, the existing maritime safety information dissemination system has certain limitations. First, the existing system only disseminates maritime safety information to GMDSS-compliant vessels, resulting in vessels without NAVTEX and Inmarsat EGC receivers being unable to receive maritime safety information. Second, the dissemination range of the NAVTEX system is limited. The Inmarsat EGC system can disseminate globally, but its control is in foreign hands, and the principle of "borne by the coastal state" needs to be followed for using it to disseminate maritime safety information. Due to the gap in the construction level of dissemination infrastructure, there will be coverage blind spots in some sea areas, making it impossible for Chinese vessels on global voyages to receive critical maritime safety information in a timely manner, posing a threat to navigation safety. Third, traditional maritime safety information dissemination mainly broadcasts to the covered sea areas at fixed schedules every day through coastal radio stations. After the information is disseminated, it is impossible to confirm whether the vessels have received the information. Therefore, repetitive broadcasts are required multiple times, resulting in overtime dissemination problems when there is a large amount of information and causing a waste of a large amount of dissemination resources. Finally, there are a large number of manual intervention tasks in the current maritime safety information dissemination process. For example, after receiving maritime safety information, the duty officers of coastal radio stations need to manually verify, classify, register the information, etc. If there are doubts about the information, they also need to verify with the issuing unit in a timely manner. Such manual intervention tasks not only reduce the processing efficiency of maritime safety information but also are difficult to meet the requirements of standardized, efficient, and transparent maritime management under the growing new situations and requirements. Therefore, disseminating maritime safety information to non-compliant vessels, achieving autonomous and controllable global dissemination of maritime safety information, reducing waste of maritime safety information dissemination resources, and improving the efficiency of maritime safety information are of extremely important practical significance for enhancing the level of maritime safety information guarantee.

[0005] At the same time, with the development of maritime VHF communication technology, the messages related to navigation safety in AIS / VDES can be used for disseminating maritime safety information, sent to a specific target or all vessels in a certain area, and AIS / VDES is a device that ships meeting the requirements are compulsorily installed as stipulated by the International Maritime Organization; on the other hand, with China's Beidou system joining GMDSS, the short messages of Beidou-3 can also undertake the responsibility of disseminating maritime safety information. Generally speaking, in order to realize the next-generation maritime safety information dissemination system with full ship type coverage and global coverage, the present invention intends to construct a core shore-based integration platform, which realizes interconnection with relevant departments to obtain accurate maritime safety information, further formulates appropriate dissemination strategies according to the real-time situation, and follows the designed dissemination process, so as to enhance the level of maritime safety information guarantee in China. In view of this, the present invention proposes a space-ground integrated global maritime safety information dissemination system, aiming to be the upgrade direction of the existing maritime safety information dissemination system, realizing full ship type coverage and global coverage of maritime safety information dissemination, improving the efficiency and effectiveness of maritime safety information dissemination, and reducing waste of dissemination resources. Summary of the Invention

[0006] To solve the above problems existing in the dissemination of maritime safety information, the present invention proposes a satellite-ground integrated global maritime safety information dissemination system and method. By adding a shore-based coordination system, obtaining the authorized maritime safety information dissemination tasks issued by the competent department, using its different functional modules to realize the parsing of maritime safety information and the formulation of dissemination strategies, and finally disseminating through each independent dissemination system connected to the shore-based coordination system, and realizing the real-time monitoring and effectiveness evaluation of the dissemination effect. The present invention can better meet the safety needs of ships sailing at sea, provide accurate, timely and reliable maritime safety information, and provide more powerful support for the safe navigation of ships and the safety of maritime personnel operations.

[0007] To achieve the above object, the first aspect of the present invention provides a satellite-ground integrated global maritime safety information dissemination system, including a shore-based coordination system and a number of independent dissemination systems connected to the shore-based coordination system;

[0008] The shore-based coordination system includes a data receiving module, a data processing module, a dissemination strategy formulation module, an external interface module and an effectiveness evaluation module;

[0009] The data receiving module receives the maritime safety information data from the competent department through a dedicated network based on an encrypted transmission protocol and performs parsing and processing to obtain the specific content of the maritime safety information, including information such as the information source, information number, specific business content, business coverage time and business action area, etc., and converts the heterogeneous format of maritime safety information data into a unified structured data format to ensure the digital circulation of maritime safety information data between the modules of the shore-based coordination system and improve the processing speed of maritime safety information;

[0010] The data processing module divides the maritime safety information into three categories: meteorological, navigation warning or search and rescue according to the information source parsed by the data receiving module; for each category of maritime safety information, the data processing module assigns different priorities to the maritime safety information according to the specific business content parsed by the data receiving module, and the priorities are extremely important, important and routine from high to low. Among them, information with a high priority needs to be responded immediately, and information with a low priority can be normally responded, and extremely important messages have absolute priority compared with other information; the setting of the priority of maritime safety information helps the subsequent formulation of dissemination strategies, so as to make the best use and allocation of dissemination resources and ensure that key information can be fully conveyed;

[0011] The broadcast strategy formulation module is used to formulate a broadcast strategy to determine the broadcast system, broadcast frequency, and broadcast duration of maritime safety information; the broadcast system includes NAVTEX, Inmarsat EGC, AIS / VDES, and Beidou-3 short message system. AIS / VDES is used to broadcast maritime safety information to ships within a range less than 50 nautical miles from the coast; NAVTEX is used to broadcast maritime safety information to ships within a range of 50 to 400 (including endpoints) nautical miles from the coast; Inmarsat EGC and Beidou-3 short message system are used to broadcast maritime safety information to ships within the global sea area more than 400 nautical miles from the coast.

[0012] The broadcast frequency is determined according to the priority classification result of the data processing module for maritime safety information; specifically, for maritime safety information with extremely important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately. If the frequency is occupied, the ongoing transmission will be interrupted, and it will be broadcast immediately after the frequency becomes idle. After the extremely important information is broadcast, the original broadcast work will resume normal broadcasting; the extremely important priority maritime safety information needs to be broadcast every 1 to 2 hours; for the important priority maritime safety information, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately. If the frequency is occupied, it will be broadcast after the current broadcast ends; the important priority maritime safety information needs to be broadcast every 2 to 4 hours; for the general priority maritime safety information, it will be broadcast within the specified broadcast time according to the broadcast schedule.

[0013] The broadcast duration is determined according to the service coverage time parsed by the data receiving module and remains broadcast within the service coverage time of the maritime safety information.

[0014] The external interface module is connected to the broadcast strategy formulation module and each broadcast system. The external interface module selects the corresponding broadcast system for broadcasting according to the formulated broadcast strategy; at the same time, the ships within the broadcast area feedback the reception to the corresponding broadcast system after receiving the maritime safety information, and each broadcast system then uniformly feeds back to the external interface module.

[0015] The effectiveness evaluation module is connected to the external interface module. Based on the broadcast feedback data transmitted by the external interface module, it conducts an effectiveness evaluation of the broadcast effect of maritime safety information. The content of the effectiveness evaluation includes the broadcast coverage range and broadcast timeliness to evaluate whether the formulated broadcast strategy meets the needs of ship-end users.

[0016] Further, the data source formats of maritime safety information include emails, official document faxes, or real-time voices, etc. The data receiving module uses natural language processing and semantic understanding algorithms to parse data in text formats such as emails and official document faxes, and uses voice signal processing and semantic understanding algorithms to parse data in voice formats; the maritime safety information received through the private network has been authenticated and reviewed.

[0017] Further, the meteorological information is further divided into two categories: meteorological forecasts and meteorological warnings according to the specific business content parsed out. When the specific business content is the daily weather forecast, it is meteorological forecast information; when the specific business content is a meteorological disaster, it is meteorological warning information; the meteorological forecast information is divided into the regular priority level; for meteorological warning information, when the meteorological disaster level is a blue warning, it is divided into the regular priority level, when the meteorological disaster level is an orange warning or above and the business impact area is close to the ship-intensive area, it is divided into the extremely important priority level, and the rest are important priority levels; the meteorological disasters include, but are not limited to, storm surges, sea wave disasters, sea ice disasters, sea fog disasters, tsunamis, etc.

[0018] For navigation warning information, when its specific business content involves emergency operation requirements for ships to immediately take evasive or detouring actions, etc., it is divided into the extremely important priority level, and the rest of the navigation warning information is divided into the important priority level.

[0019] For search and rescue information, when its specific business content involves an emergency situation related to human life safety, it is divided into the extremely important priority level, and the rest of the search and rescue information is divided into the important priority level.

[0020] Further, the broadcast area is determined according to the business impact area of the parsed maritime safety information and the priority division result of the maritime safety information; specifically, for maritime safety information with the regular priority level, the parsed business impact area is regarded as the broadcast area; for maritime safety information with the important priority level, the broadcast area is set to a range extending 3 to 5 nautical miles outward from the business impact area; for maritime safety information with the extremely important priority level, the broadcast area is set to a range extending 6 to 8 nautical miles outward from the business impact area.

[0021] Further, the shore-based coordination system further includes an integrated visualization module. The integrated visualization module displays the broadcast situation of maritime safety information in real time. Its data sources include the broadcast strategy of the broadcast strategy formulation module and the broadcast effectiveness evaluation result of the effectiveness evaluation module, covering the information that has been broadcast, the information that is being broadcast, and the information planned to be broadcast, so as to realize the summary display of information.

[0022] Furthermore, the comprehensive visualization module, based on the electronic chart technology and the S-100 data model with XML encoding standard, displays various types of maritime safety information on the chart, enabling shore-based management users to intuitively understand the geographical location and coverage range of the information. The map supports functions such as zooming and dragging to meet the viewing needs of users for different regions. The comprehensive visualization module provides real-time statistics and summary display functions for the dissemination results. Shore-based management users can evaluate the dissemination effect by viewing indicators such as the dissemination success rate, dissemination time, and dissemination effectiveness of different information. For high-priority maritime safety information, the comprehensive visualization module sets an alarm or reminder function within the system to ensure that shore-based management users can promptly pay attention to such maritime safety information to handle subsequent possible operations.

[0023] It should be noted that during the process of the flow of maritime safety information, the shore-based coordination system must strictly abide by the principles of data security and privacy protection to ensure that the information is not leaked or misused. Moreover, the shore-based coordination system needs to have strong data processing and storage capabilities, be able to efficiently and concurrently process a large amount of maritime safety information data, and perform long-term storage.

[0024] The second aspect of the present invention provides a space-ground integrated global maritime safety information dissemination method, including the following steps:

[0025] Step 1: Receive maritime safety information data from the competent department and parse out information such as the information source, information number, specific business content, business coverage time, and business impact area, and convert the heterogeneous format of maritime safety information data into a unified structured data format.

[0026] Step 2: According to the information source parsed in Step 1, divide the maritime safety information into three categories: meteorological, navigation warning, or search and rescue; for each category of maritime safety information, assign different priorities to the maritime safety information based on the specific business content parsed in Step 1. The priorities are, from high to low, extremely important, important, and routine.

[0027] Step 3: Develop a dissemination strategy based on the priority division results and the parsed information. The dissemination strategy includes the dissemination system, dissemination frequency, and dissemination duration; among them, use AIS / VDES to disseminate maritime safety information to ships in the dissemination area within 50 nautical miles from the coast, use NAVTEX to disseminate maritime safety information to ships in the dissemination area within 50 - 400 (including endpoints) nautical miles from the coast, and use Inmarsat EGC and Beidou-3 short message system to disseminate maritime safety information to ships in the global sea area where the dissemination area is more than 400 nautical miles from the coast.

[0028] The broadcast frequency is determined according to the priority division result of the maritime safety information obtained in Step 2; specifically, for the maritime safety information with extremely high priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately. If the frequency is occupied, the ongoing transmission will be interrupted, and once the frequency becomes idle, it will be broadcast immediately. After the extremely important information is broadcast, the original broadcast work will resume normal broadcasting; the maritime safety information with extremely high priority needs to be broadcast once every 1 to 2 hours; for the maritime safety information with high priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately. If the frequency is occupied, it will be broadcast after the current broadcast ends; the maritime safety information with high priority needs to be broadcast once every 2 to 4 hours; for the maritime safety information with normal priority, it will be broadcast within the specified broadcast time according to the broadcast schedule.

[0029] The broadcast duration is determined according to the service coverage time parsed in Step 1 and remains broadcast within the service coverage time of the maritime safety information.

[0030] Step 4, transmit the broadcast strategy formulated in Step 3 to the corresponding broadcast system for broadcasting; the ships within the broadcast area feedback the reception to the corresponding broadcast system after receiving the maritime safety information.

[0031] Step 5, collect the broadcast feedback data received by the broadcast system and conduct an effectiveness evaluation of the broadcast effect of the maritime safety information. The content of the effectiveness evaluation includes the broadcast coverage range and the broadcast timeliness.

[0032] Furthermore, in the said Step 1, the data source formats of the maritime safety information include emails, official document faxes, or real-time voices, etc. Among them, for the text format data such as emails and official document faxes, natural language processing and semantic understanding algorithms are used for parsing, and for the voice format data, voice signal processing and semantic understanding algorithms are used for parsing.

[0033] Furthermore, in the said Step 2, the meteorological information is further divided into two categories: meteorological forecasts and meteorological warnings according to the specific service content parsed in Step 1. When the specific service content is the daily weather forecast, it is meteorological forecast information. When the specific service content is a meteorological disaster, it is meteorological warning information; the meteorological forecast information is classified as having normal priority; for the meteorological warning information, when the meteorological disaster level is a blue warning, it is classified as having normal priority. When the meteorological disaster level is an orange warning or above and the service area is close to a ship-intensive area, it is classified as extremely important, and the rest is of high priority; the meteorological disasters include but are not limited to storm surges, wave disasters, sea ice disasters, sea fog disasters, tsunamis, etc.

[0034] For the navigation warning information, when its specific service content involves emergency action operations such as requiring ships to immediately take evasive or detouring actions, it is classified as having extremely high priority, and the rest of the navigation warning information is classified as having high priority.

[0035] For search and rescue information, when its specific business content involves emergency situations related to human life safety, it is classified as the extremely important priority level, and the remaining search and rescue information is classified as the important priority level.

[0036] Furthermore, the broadcast area is determined according to the service area of the maritime safety information parsed in step 1 and the priority classification result of this maritime safety information in step 2; specifically, for the maritime safety information with the regular priority level, the parsed service area is regarded as the broadcast area; for the maritime safety information with the important priority level, the broadcast area is set to the range that extends 3 to 5 nautical miles outward from the service area; for the maritime safety information with the extremely important priority level, the broadcast area is set to the range that extends 6 to 8 nautical miles outward from the service area.

[0037] The beneficial effects of the present invention are as follows:

[0038] 1) The present invention provides a space-ground integrated global maritime safety information broadcast system, which adds two broadcast systems, namely the AIS / VDES and the Beidou-3 short message system, covering ship types without NAVTEX and Inmarsat EGC receivers, ensuring the globally autonomous and controllable broadcast of maritime safety information; by adding a shore-based coordination system, comprehensive coordination and docking of each individual broadcast system and digital circulation of maritime safety information are realized, and global coverage broadcast, service coordination management and efficient data processing of maritime safety information are achieved without manual intervention, improving the broadcast efficiency and reliability of maritime safety information;

[0039] 2) The present invention provides a method for designing the priority classification and broadcast process of space-ground integrated global maritime safety information. Through priority classification and broadcast process design, instant response, integrated processing and effective broadcast of maritime safety information can be realized, improving the broadcast effectiveness and accuracy of maritime safety information;

[0040] 3) The space-ground integrated global maritime safety information broadcast system provided by the present invention helps to improve the application level and efficiency of maritime management, provides more effective, accurate, reliable and efficient maritime safety information services for global maritime navigation, and enhances the global safety guarantee ability of ships' maritime navigation. Description of the Drawings

[0041] Figure 1 It is a block diagram of the structure of the space-ground integrated global maritime safety information broadcast system of the present invention.

[0042] Figure 2 It is a block diagram of the structure of the shore-based coordination system in the space-ground integrated global maritime safety information broadcast system of the present invention.

[0043] Figure 3It is a flow chart for the dissemination of maritime safety information of the conventional priority meteorological type.

[0044] Figure 4 It is a flow chart for the dissemination of maritime safety information of the important priority navigation warning type.

[0045] Figure 5 It is a flow chart for the dissemination of maritime safety information of the extremely important priority search and rescue type. Specific implementation manner

[0046] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] The present invention provides a space-ground integrated global maritime safety information dissemination system. The structural block diagram of the system is as Figure 1 shown, including NAVTEX, Inmarsat EGC, Beidou-3 short message system, AIS / VDES and shore-based coordination system. Among them, NAVTEX, Inmarsat EGC, Beidou-3 short message system and AIS / VDES are connected to the shore-based coordination system as independent dissemination systems respectively. The shore-based coordination system is the core of the space-ground integrated global maritime safety information dissemination system and is the centralized management and processing center of maritime safety information.

[0048] Each independent dissemination system has different working frequencies and coverage ranges, as shown in Table 1. The AIS / VDES disseminates maritime safety information to ships within 50 nautical miles off the coast. The AIS / VDES system is less affected by external natural factors and can play a unique role in ship collision avoidance, maritime search and rescue, maritime investigation, etc. The NAVTEX system disseminates maritime safety information to ships within 50 - 400 nautical miles off the coast. For ships more than 400 nautical miles from the coast, the Inmarsat EGC and Beidou-3 short message system disseminate maritime safety information to the ships. Among them, the Beidou-3 short message system is an independently controllable system in our country, and the data security can be guaranteed.

[0049] Table 1 Working frequencies and coverage ranges of the dissemination systems

[0050]

[0051] The shore-based coordination system is the core of the space-ground integrated global maritime safety information dissemination system, with functions such as source information acquisition, data processing, dissemination strategy formulation and dissemination effectiveness evaluation, responsible for managing maritime safety information and uniformly coordinating each independent dissemination system. At the same time, the shore-based coordination system should at least adopt the form of dual-machine hot standby to ensure the security and reliability of maritime safety information data to the greatest extent. Its system block diagram is as Figure 2As shown in the figure. The shore-based coordination system consists of a data reception module, a data processing module, a broadcast strategy formulation module, an external interface module, a validity evaluation module, and a comprehensive visualization module.

[0052] Embodiment 1: The space-ground integrated maritime safety information broadcast system of the present invention is used to broadcast routine priority meteorological maritime safety information, and the broadcast process is as Figure 3 shown. The meteorological forecast content is as follows: 250303006, A blue warning signal for strong winds at sea was issued at 10:41 on March 3, 2025: It is expected that from the afternoon to evening of the 3rd, there will be a northeasterly wind of force 6 along the coast of Dalian, with gusts of 7 to 8. Please relevant departments do a good job in preventing strong winds and pay attention to the safety of maritime transportation and operations.

[0053] First, the data receiving module of the shore-based coordination system receives the maritime safety information sent by the meteorological department via a dedicated network using the HTTPS protocol. It parses that the information source is the Dalian Meteorological Observatory, the information number is 250303006, the specific business content is a blue warning for strong winds at sea, the business coverage time is from 13:00 to 18:00 on March 3, 2025, the business affected area is the coastal area of Dalian, and it converts the source information data into structured data to ensure the flow of data between modules of the shore-based coordination system. Then, the data after format conversion is transferred to the data processing module. The data processing module determines that the maritime safety information is meteorological information based on the parsed information source being the Dalian Meteorological Observatory, and classifies this meteorological information as a regular priority according to the parsed specific business content of a blue warning for strong winds at sea. Then, the broadcast strategy formulation module formulates a broadcast strategy according to the result of the priority division of the maritime safety information and the parsed information. For meteorological maritime safety information with a regular priority, first, the broadcast area is set as the business affected area. The broadcast area of this information is the coastal area of Dalian, usually within 50 nautical miles from the coast, so AIS / VDES is used for broadcasting; the broadcast duration is from 13:00 to 18:00 on March 3, 2025; it is judged whether the current time is within the specified broadcast time. If the current time is not within the specified broadcast time, it waits until the specified broadcast time; if the current time is within the specified broadcast time, the maritime safety information is transcoded to match the selected broadcast system and is broadcast according to the formulated broadcast strategy. After receiving the maritime safety information, ships within the broadcast area also use AIS / VDES to feedback the reception to the broadcast station, and the external interface module feeds back the broadcast result to the effectiveness evaluation module, and the effectiveness evaluation module evaluates the effectiveness of this broadcast. These two belong to subsequent broadcast actions and do not affect the timeliness of this broadcast. Finally, the entire broadcast process is tracked and displayed in full by the comprehensive visualization module. The comprehensive visualization module displays the broadcast situation of the maritime safety information and related information in real time. Its data sources include the broadcast strategy of the broadcast strategy formulation module and the broadcast effectiveness evaluation result of the effectiveness evaluation module, facilitating the shore-based management personnel to grasp the real-time situation of the broadcast service.

[0054] Embodiment 2: The space-ground integrated maritime safety information broadcast system of the present invention is used to broadcast important priority navigation warning information, and the broadcast process is as Figure 4 shown. The content of the navigation warning is as follows: Tianjin Navigation Warning 13 / 25 Tianjin Port. From now until May 31, 2024, the "Tianjinghao", "Tianlinhao", "Shunxing 99", and "Jinyou 19" will carry out quay construction operations in the west port basin of Dalian Port.

[0055] First, the data receiving module of the shore-based coordination system receives maritime safety information sent by the maritime administration department through a dedicated network using the HTTPS protocol. It parses that the information source is Tianjin Maritime Bureau, the information number is 13 / 25, the specific business content is dock construction operations, the business coverage time is from May 11, 2024 (the date of receiving this information) to May 31, 2024, and the business area of effect is from 38°59′08″N, 122°02′00″E to 38°53′00″N, 121°41′00″E; and converts the source information data into structured data to ensure the flow of data between modules of the shore-based coordination system. Then, the data after format conversion is transferred to the data processing module. The data processing module determines that the maritime safety information is a navigation warning message based on the parsed information source being the maritime bureau, and classifies this navigation warning message as of high priority according to the parsed specific business content of dock construction operations. Then, the broadcast strategy formulation module formulates a broadcast strategy based on the priority classification result of the maritime safety information and the parsed information. For navigation warning-type maritime safety information of high priority, first, the broadcast area is set to a range extending 3 to 5 nautical miles outward from the business area of effect. The broadcast area of this information is within about 9 to 11 nautical miles from the coast, so AIS / VDES is used for broadcast; the broadcast duration is from May 11, 2024 to May 31, 2024; it is judged whether the frequency of the selected broadcast system is idle. If the current frequency is occupied, wait until the current broadcast ends and then broadcast again; if the current frequency is idle, transcode this navigation warning message to match the selected broadcast system and broadcast it according to the formulated broadcast strategy. After receiving the maritime safety information, ships within the broadcast area also use AIS / VDES to feedback the reception to the broadcast station, and the external interface module feeds back the broadcast result to the effectiveness evaluation module, and the effectiveness evaluation module evaluates the effectiveness of this broadcast. These two belong to subsequent broadcast actions and do not affect the timeliness of this broadcast. Finally, the entire broadcast process is tracked and displayed in full flow by the comprehensive visualization module. The comprehensive visualization module displays the broadcast situation of the maritime safety information and related information in real time. Its data sources include the broadcast strategy of the broadcast strategy formulation module and the broadcast effectiveness evaluation result of the effectiveness evaluation module, facilitating the shore-based management personnel to master the real-time situation of the broadcast service.

[0056] Embodiment 3: The space-ground integrated maritime safety information broadcast system of the present invention is used to broadcast extremely important priority search and rescue type maritime safety information, and the broadcast process is as Figure 5As shown below. The search and rescue information is as follows: NAVAREA XV 231 / 14, San Ambrosio & San Felix, Chile. Four speedboats carrying 20 pirates armed with automatic weapons attacked a fishing boat. The pirates have left, leaving a number of seafarers injured and in urgent need of help.

[0057] First, the data receiving module of the shore-based coordination system receives maritime safety information sent by the search and rescue center via a dedicated network using the HTTPS protocol. It parses that the information source is the Chile Search and Rescue Coordination Center, the information number is 231 / 14, and the specific business content is "Four speedboats carrying 20 pirates armed with automatic weapons attacked a fishing boat. The pirates have left, leaving a number of seafarers injured and in urgent need of help". This information does not include the service coverage time, and the service area is San Ambrosio & San Felix. Then, it converts the source information data into structured data to ensure the flow of data between modules of the shore-based coordination system. Next, the data after format conversion is transferred to the data processing module. Based on the parsed information source being the Chile Search and Rescue Coordination Center, the data processing module determines that the maritime safety information is a search and rescue type of information. And according to the specific business content parsed as "Four speedboats carrying 20 pirates armed with automatic weapons attacked a fishing boat. The pirates have left, leaving a number of seafarers injured and in urgent need of help", it classifies this search and rescue type of information as extremely important priority. Then, the dissemination strategy formulation module formulates a dissemination strategy based on the result of the priority classification of the maritime safety information and the parsed information. For extremely important priority search and rescue type maritime safety information, first, the dissemination area is set to a range that extends 6 - 8 nautical miles outward from the service area. The dissemination area of this information is more than 500 nautical miles from the coast, so it is disseminated using Inmarsat EGC and Beidou-3 short message service. Since the information does not specify the dissemination duration, it is set to be disseminated once every two hours for 24 consecutive hours. It judges whether the frequency of the selected dissemination system is idle. If the current frequency is occupied, the ongoing transmission is interrupted, and once the frequency is idle, it is immediately disseminated. If the current frequency is idle, the search and rescue type of information is transcoded to match the selected dissemination system and is disseminated according to the formulated dissemination strategy. After receiving the maritime safety information, the ships within the dissemination area also use Inmarsat EGC or Beidou-3 short message service to feedback the reception to the dissemination station. The external interface module feeds back the dissemination result to the effectiveness evaluation module, and the effectiveness evaluation module evaluates the effectiveness of this dissemination. These two are subsequent actions of the dissemination and do not affect the timeliness of this dissemination.Finally, the entire dissemination process is tracked and displayed in full by the integrated visualization module, which shows the dissemination status of maritime safety information and related information in real time. Its data sources include the dissemination strategy of the dissemination strategy formulation module and the dissemination effectiveness evaluation results of the effectiveness evaluation module, facilitating the onshore management personnel to grasp the real-time situation of the dissemination service.

[0058] The present invention provides an objective and scientific space-ground integrated global maritime safety information dissemination system and method. Through systematic framework design, it ensures the autonomous and controllable dissemination of maritime safety information covering all ship types and all sea areas, realizes the centralized management, efficient processing and effective dissemination of maritime safety information, improves the dissemination efficiency, reliability and accuracy of maritime safety information through method process design, and enhances the global safety guarantee ability of ships during maritime navigation.

[0059] Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention and do not constitute any form of limitation to the present invention. Those skilled in the art should fully understand that it is completely feasible to modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on any part or all of the technical features therein. As long as these modifications or replacements do not deviate from the protection scope determined by the claims of the present invention, they should be regarded as reasonable extensions of the present invention.

Claims

1. A satellite-ground integrated global maritime safety information broadcasting system, characterized in that: It includes a shore-based coordination system and several independent broadcasting systems connected to the shore-based coordination system; The shore-based coordination system includes a data receiving module, a data processing module, a broadcast strategy formulation module, an external interface module and a validity evaluation module; The data receiving module receives maritime safety information data from the competent department through a dedicated network based on an encrypted transmission protocol and performs parsing processing to obtain the specific content of the maritime safety information, including the source of the information, the information number, the specific business content, the business coverage time and the business application area, and converts the maritime safety information data in heterogeneous formats into a unified structured data format; The data processing module divides the maritime safety information into three categories: meteorological, navigation warning or search and rescue according to the information source parsed by the data receiving module; for each category of maritime safety information, the data processing module assigns different priorities to the maritime safety information according to the specific business content parsed by the data receiving module, and the priorities are extremely important, important and routine from high to low; The broadcast strategy formulation module is used to formulate a broadcast strategy to determine the broadcast system, broadcast frequency and broadcast duration of maritime safety information; the broadcast system includes NAVTEX, Inmarsat EGC, AIS / VDES and BeiDou-3 short message system, using AIS / VDES to broadcast maritime safety information to ships within a broadcast area of ​​less than 50 nautical miles from the coast, using NAVTEX to broadcast maritime safety information to ships within a broadcast area of ​​50 to 400 nautical miles from the coast, and using Inmarsat EGC and BeiDou-3 short message system to broadcast maritime safety information to ships in the global waters with a broadcast area greater than 400 nautical miles from the coast; The broadcast frequency is determined according to the priority classification result of the maritime safety information by the data processing module: for the maritime safety information of extremely important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, the ongoing transmission will be interrupted, and the frequency will be idle and broadcast immediately. After the broadcast of the extremely important information is completed, the original broadcast work will resume normal broadcasting; the maritime safety information of extremely important priority is broadcast once every 1 to 2 hours; for the maritime safety information of important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, it will be broadcast after the current broadcast is completed; the maritime safety information of important priority is broadcast once every 2 to 4 hours; for the maritime safety information of normal priority, it is broadcast within the specified broadcast time according to the broadcast schedule; The broadcasting duration is determined according to the service coverage time analyzed by the data receiving module, and the broadcasting is maintained within the service coverage time range of the maritime safety information; The external interface module is connected to the broadcast strategy formulation module and each broadcast system. The external interface module selects the corresponding broadcast system for broadcasting according to the formulated broadcast strategy. At the same time, after receiving the maritime safety information, the ships in the broadcast area feedback the reception to the corresponding broadcast system, and each broadcast system then uniformly feedbacks to the external interface module. The effectiveness evaluation module is connected to the external interface module, and performs effectiveness evaluation on the broadcast effect of maritime safety information based on the broadcast feedback data transmitted by the external interface module. The effectiveness evaluation includes the broadcast coverage and the timeliness of the broadcast, so as to evaluate whether the formulated broadcast strategy meets the needs of ship-side users.

2. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1, characterized in that: The data receiving module uses natural language processing and semantic understanding algorithms to parse data in text format, and uses voice signal processing and semantic understanding algorithms to parse data in voice format.

3. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1 is characterized in that: The meteorological information is divided into two categories according to the specific business content analyzed, namely, meteorological forecast and meteorological warning. When the specific business content is daily weather forecast, it is meteorological forecast information; when the specific business content is meteorological disaster, it is meteorological warning information. The meteorological forecast information is classified into conventional priority. For meteorological warning information, when the meteorological disaster level is blue warning, it is classified into conventional priority. When the meteorological disaster level is above orange warning and the business action area is close to the ship-intensive area, it is classified into extremely important priority. The rest are important priorities. The meteorological disasters include storm surges, sea wave disasters, sea ice disasters, sea fog disasters, and tsunamis. For navigation warning information, when its specific business content involves requiring the ship to take emergency actions immediately, it is classified as extremely important priority, and the rest of the navigation warning information is classified as important priority; For search and rescue information, when its specific business content involves emergency situations involving human life safety, it is classified as extremely important priority, and the rest of the search and rescue information is classified as important priority.

4. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1, characterized in that: The broadcast area is determined based on the business impact area of ​​the analyzed maritime safety information and the priority division result of the maritime safety information; specifically, for maritime safety information of normal priority, the broadcast area is the analyzed business impact area; for maritime safety information of important priority, the broadcast area is a range extending 3 to 5 nautical miles outward from the business impact area; for maritime safety information of extremely important priority, the broadcast area is a range extending 6 to 8 nautical miles outward from the business impact area.

5. The satellite-ground integrated global maritime safety information broadcasting system according to claim 1 is characterized in that: The shore-based coordination system also includes a comprehensive visualization module, which displays the broadcasting status of maritime safety information in real time. Its data sources include the broadcasting strategy of the broadcasting strategy formulation module and the broadcasting effectiveness evaluation results of the effectiveness evaluation module, covering information that has been broadcast, information that is being broadcast, and information that is planned to be broadcast, thereby realizing the summary display of information.

6. The satellite-ground integrated global maritime safety information broadcasting system according to claim 5, characterized in that: The comprehensive visualization module is based on electronic nautical chart technology and the S-100 data model of the XML encoding standard, and displays various types of maritime safety information on the nautical chart. The map supports zooming and dragging to meet users' viewing needs for different areas; the comprehensive visualization module provides real-time statistics and summary display functions for broadcast results, and shore-based management users can evaluate the broadcast effect by viewing the broadcast success rate, broadcast time, and broadcast effectiveness indicators of different information.

7. A satellite-ground integrated global maritime safety information broadcasting method, characterized in that: The following steps are involved: Step 1: Receive maritime safety information data from the competent authorities and parse out information such as the source of the information, information number, specific business content, business coverage time and business application area, and convert the maritime safety information data in heterogeneous formats into a unified structured data format; Step 2: Classify the maritime safety information into three categories: meteorological, navigation warning or search and rescue, based on the information source analyzed in step 1; assign different priorities to each category of maritime safety information based on the specific business content analyzed in step 1, with the priorities being extremely important, important and routine from high to low; Step 3: formulate a broadcast strategy based on the priority classification results and the parsed information. The broadcast strategy includes the broadcast system, broadcast frequency and broadcast duration. AIS / VDES is used to broadcast maritime safety information to ships within 50 nautical miles from the coast, NAVTEX is used to broadcast maritime safety information to ships within 50 to 400 nautical miles from the coast, and Inmarsat EGC and BeiDou-3 short message systems are used to broadcast maritime safety information to ships in the global waters with a broadcast area greater than 400 nautical miles from the coast. The broadcast frequency is determined according to the priority classification result of the maritime safety information obtained in step 2: for maritime safety information of extremely important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, the ongoing transmission will be interrupted, and the frequency will be idle and broadcast immediately. After the broadcast of extremely important information is completed, the original broadcast work will resume normal broadcasting; maritime safety information of extremely important priority is broadcast once every 1 to 2 hours; for maritime safety information of important priority, if the current frequency of the selected broadcast system is idle, it will be broadcast immediately; if the frequency is occupied, it will be broadcast after the current broadcast is completed; maritime safety information of important priority is broadcast once every 2 to 4 hours; for maritime safety information of normal priority, it is broadcast within the specified broadcast time according to the broadcast schedule; The broadcasting duration is determined according to the service coverage time parsed in step 1, and the broadcasting is maintained within the service coverage time range of the maritime safety information; Step 4: Transmit the broadcast strategy formulated in step 3 to the corresponding broadcast system for broadcasting; after receiving the maritime safety information, the ships in the broadcast area feedback the receipt to the corresponding broadcast system; Step 5: Collect the broadcast feedback data received by the broadcast system and conduct an effectiveness evaluation on the broadcast effect of maritime safety information. The effectiveness evaluation includes the broadcast coverage and timeliness of the broadcast.

8. The satellite-ground integrated global maritime safety information broadcasting method according to claim 7, characterized in that: In the step 1, the data in text format is parsed using natural language processing and semantic understanding algorithms, and the data in voice format is parsed using voice signal processing and semantic understanding algorithms.

9. The satellite-ground integrated global maritime safety information broadcasting method according to claim 7, characterized in that: In step 2, meteorological information is divided into two categories: meteorological forecast and meteorological warning according to the specific business content parsed in step 1. When the specific business content is daily weather forecast, it is meteorological forecast information, and when the specific business content is meteorological disaster, it is meteorological warning information; the meteorological forecast information is classified into conventional priority; for meteorological warning information, when the meteorological disaster level is blue warning, it is classified into conventional priority, when the meteorological disaster level is above orange warning and the business action area is close to the ship-intensive area, it is classified as extremely important, and the rest are important priorities; the meteorological disasters include storm surges, sea wave disasters, sea ice disasters, sea fog disasters, and tsunamis; For navigation warning information, when its specific business content involves requiring the ship to take emergency actions immediately, it is classified as extremely important priority, and the rest of the navigation warning information is classified as important priority; For search and rescue information, when its specific business content involves emergency situations involving human life safety, it is classified as extremely important priority, and the rest of the search and rescue information is classified as important priority.

10. The satellite-ground integrated global maritime safety information broadcasting method according to claim 7, characterized in that: For maritime safety information of normal priority, the broadcast area is the parsed business action area; for maritime safety information of important priority, the broadcast area is a range of 3 to 5 nautical miles extending outward from the business action area; for maritime safety information of extremely important priority, the broadcast area is a range of 6 to 8 nautical miles extending outward from the business action area.

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