Remote maintenance method for ship communication equipment

Abstract

The invention relates to the technical field of ship communication, in particular to a remote maintenance method for ship communication equipment, which comprises the following steps of: constructing a communication base station distribution topology according to communication base station distribution information in a shore-based communication system, deploying a position sensor on a ship, and sensing a ship navigation track by operating at a specified refresh frequency based on the position sensor; the method comprises the following steps: acquiring an electronic map of a navigation area between a ship navigation starting point and a ship navigation ending point, adjusting an electronic map scale to enable the electronic map scale to be the same as a communication base station distribution topology scale, and correspondingly placing the communication base station distribution topology into the electronic map based on the same coordinate axis system, according to the method, the optimal communication position is searched in a specified range in combination with the real-time position of the ship and communication hindrance generated by a land mountain and a slope represented in an electronic map, so that service is provided for ship communication, and the ship communication quality can be improved through adjustment based on the ship communication position in the ship communication process.

Description

Technical Field

[0001] The present invention relates to the technical field of ship communications, and in particular to a remote maintenance method for ship communication equipment. Background Art

[0002] Ship communication is the key to ensuring the safety of ship navigation and the smooth operation of marine operations. It covers a variety of methods, such as VHF radiotelephone for short-distance calls and satellite communication for long-distance communication. Crew members can receive important information such as weather and navigation instructions, and it is also convenient to communicate with shore and other ships, playing an indispensable role in the field of navigation.

[0003] The invention patent with application number 201811645907.8 discloses a real-time parsing and filtering method for ship communication messages: the method comprises the following steps: S1 message configuration (1) message definition The ship communication system adopts UDP messages for communication: when two devices A and B interact, device A first sends a command message to device B. After device B receives the command message from device A, device B sends a confirmation message to device A, indicating that the command message sent by device A to device B has been received; if device A does not receive the confirmation message sent by device B within a period of time, it resends the command message to device B to ensure the stability of communication; in the ship communication message structure, the ship The ship communication UDP message consists of two parts: the UDP message header and the UDP data: HeadData1, HeadData2...HeadDataN represent the information fields in the message header, including the sender IP, sender port number, target IP, target port number and message length information; UDP data is the data information that really needs to be transmitted. The first four bytes of UDP data are the message ID, and the message ID uniquely identifies a message; when parsing the message, the received data is parsed according to the data field defined in this message in combination with the message ID; Data1, Data2...DataN represent the data fields in the message, and the data fields are defined by the user.

[0004] The application aims to solve the problem that "the traditional message parsing method, after receiving a message, parses each data field of the data message in turn in the program code. All parsing codes process bytes according to similar logic, and each message needs to be processed by separate code. The code is cumbersome and has poor reusability. When the data field of the message changes, the program can only be modified and has poor scalability."

[0005] However, currently, when ships are performing communication tasks, the communication quality is subject to uncontrollable and random interference due to the influence of the ship's navigation environment, which will directly lead to errors, garbled characters and packet loss in the communication content.

[0006] Therefore, a remote maintenance method for ship communication equipment is proposed. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides a remote maintenance method for ship communication equipment, which solves the technical problems raised in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A remote maintenance method for ship communication equipment, comprising:

[0010] According to the distribution information of communication base stations in the shore-based communication system, a communication base station distribution topology is constructed, and a position sensor is deployed on the ship. Based on the position sensor, the ship's navigation track is sensed at a specified refresh frequency; an electronic map of the navigation area between the ship's navigation start point and the end point is obtained, and the scale of the electronic map is adjusted so that the scale of the electronic map is the same as the scale of the communication base station distribution topology, and the communication base station distribution topology is placed in the electronic map based on the same coordinate axis system; the scale of the ship's navigation track is adjusted so that the scale of the ship's navigation track is the same as the scale of the communication base station distribution topology, and the ship's navigation track is placed in the electronic map based on the same coordinate axis system; the ship's communication is obtained in real time. The ship receives a communication request and simultaneously obtains the latest electronic map on which the distribution topology of communication base stations and the navigation track of the ship are placed during the stage when the ship communication request is sent; the latest position of the ship and the two groups of communication base stations closest to the ship are obtained according to the navigation track of the ship in the electronic map, the ship communication area is set based on the latest position of the ship, and the best communication position is searched within the ship communication area; the searched best communication position is stored in the position sensor, and the ship driving user reads the best communication position in the position sensor, drives the ship to the best communication position, and then sends a communication request to the communication base station; when the communication request sent by the ship is received by the communication base station, the ship establishes a communication channel with the communication base station.

[0011] Furthermore, the distribution information of the communication base stations in the shore-based communication system is the location information of each communication base station in the shore-based communication system. Each communication base station in the shore-based communication system determines a corresponding point in a three-dimensional space based on its respective location information, and the corresponding points are connected adjacently to each other to construct a distribution topology of the communication base stations.

[0012] The refresh frequency of the position sensor running application is customized by the user end. The position information sensed during the position sensor running phase includes: position coordinates, offset angle, offset distance. The position coordinates, offset angle, and offset distance in the position information sensed by the position sensor during the first running are all zero. The position information sensed by the position sensor during the second and subsequent running are all based on the last sensed position information as a reference.

[0013] Among them, the position sensor stores the position coordinates of the starting point of the ship's navigation. The position sensor determines the real-time position of the ship based on the position coordinates, offset angle, and offset distance in the perceived position information. The continuously determined real-time positions of the ship are connected to each other to perceive the ship's navigation trajectory.

[0014] Furthermore, the electronic map on which the communication base station distribution topology and the ship navigation track are placed is updated in real time based on the refresh frequency of the position sensor, so that the ship navigation track in the electronic map on which the communication base station distribution topology and the ship navigation track are placed is always the latest ship navigation track updated based on the position information perceived by the position sensor.

[0015] Furthermore, when setting the ship communication area, the ship communication area is subject to: the ship communication area is a circular area determined with the latest position of the ship in the current electronic map as the center;

[0016] The radius of the ship communication area is:

[0017]

[0018] Where: r is the radius of the ship communication area; r0 is the radius base; G R , G S , G F is the rainfall, snowfall and fog density in the sea area where the ship is currently located; ω1, ω2, ω3 are weights; G(R) MAX 、G(S) MAX 、G(F) MAX The maximum historical rainfall, snowfall and fog density in the sea area where the ship is currently located;

[0019] Among them, the values ​​of weights ω1, ω2, and ω3 are customized by the user end, and the values ​​of weights ω1, ω2, and ω3 are all between 0.3 and 0.36, and ω1<ω2<ω3, and the radius base r0 is customized by the user end.

[0020] Furthermore, after the ship communication area is set, a grid is synchronously configured for the ship communication area, and grid points in the ship communication area configured with the grid are all used as communication position suitability analysis points, and communication position suitability analysis is performed, and the corresponding position coordinates of a grid point with the highest communication position suitability in the ship communication area are used as the optimal communication position;

[0021] Among them, in the grid configuration stage for the ship communication area, the size of the configuration grid is set according to the complexity of the terrain of the sea area where the ship communication area is located, so that the higher the complexity of the terrain of the sea area where the ship communication area is located, the smaller the configuration grid is, and vice versa, the larger the configuration grid is.

[0022] Furthermore, the terrain complexity of the sea area where the ship communication area is located is calculated by the following formula:

[0023]

[0024] Where: θ is the terrain complexity of the sea area where the ship communication area is located; M A M is the total land area in the sea area where the ship communication area is located; all The total area of ​​the sea area where the ship communication area is located; is the total amount of land in the sea area where the ship communication area is located; d(i,i+1) is the distance between the i-th land and the i+1-th land;

[0025] Among them, when performing the analysis operation, the terrain complexity of the sea area where the ship communication area is located is determined first. The target sea area for analysis is a rectangular area defined by the distance between the latest position of the ship and the communication base station farthest from the ship in the two groups of communication base stations closest to the ship as the length and the diameter of the ship communication area as the width, and the communication base station position and the latest position used to determine the target sea area for analysis are both on the boundary of the rectangular area, M A 、M all , d(i,i+1) all come from electronic maps.

[0026] Furthermore, the search logic of the optimal communication position is expressed as:

[0027]

[0028] Where: K1 j , K2 j is the suitability of the two communication base stations relative to the grid point j; u is the total amount of land intersecting the straight line connecting the communication base station and the grid point; h(v) max is the maximum width of the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; l v is the length of the line segment on the straight line connecting the communication base station and the grid point that is partially blocked by the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; η v L1 is the smoothness of the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; j 、L2 j is the length of the straight line connecting the two communication base stations relative to the grid points;

[0029] Among them, based on the above formula, the suitability of each grid point relative to the two communication base stations is calculated, and the value with the highest suitability is selected to be retained. A set is formed by the fitness values ​​corresponding to all grid points, and the maximum value in the set is selected, and the grid point corresponding to the maximum value is used as the optimal communication position.

[0030] Furthermore, the smoothness of the mountain and slope is calculated by the following formula:

[0031]

[0032] Where: S is the sum of the absolute values ​​of the height differences between adjacent points; y is the total number of measurement points; d is the horizontal distance between adjacent measurement points;

[0033] Among them, a number of groups of measurement points are selected by the user end on the mountain or slope, and S is determined using the measurement points.

[0034] Furthermore, the ship driving user reads the best communication position in the position sensor, that is, calls the best communication position in the position sensor, and the called best communication position is further moved to the ship's central control panel and displayed on the electronic map.

[0035] Furthermore, when the ship sends out a communication request, it first tries to access any communication base station in the shore-based communication system. When any communication base station cannot be accessed, it then executes the operation of reading the best communication position in the position sensor.

[0036] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0037] The present invention provides a remote maintenance method for ship communication equipment, which is applicable to ship shore-based communication scenarios. During the execution of the method, the distribution topology of communication base stations, the electronic map of the ship's navigation area, and the coordination of the ship's navigation track are completed, so that the distribution topology of the communication base stations and the ship's navigation track are both represented in the electronic map, thereby combining the real-time position of the ship and the communication obstacles caused by the land mountains and slopes represented in the electronic map, searching for the best communication position within a specified range, thereby providing services for ship communication, ensuring that during the ship communication process, the ship communication quality can be improved through adjustments based on the ship communication position;

[0038] At the same time, during the execution phase of the method steps, the ship communication area is effectively constrained based on the specified logic, and combined with the terrain complexity analysis of the sea area where the ship communication area is located, logical support is provided for the final determination of the ship communication position, thereby reducing ship communication interference and improving the quality and stability of ship communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 The present invention is a flowchart of a remote maintenance method for ship communication equipment. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The present invention will be further described below in conjunction with the embodiments.

[0043] Example:

[0044] A remote maintenance method for ship communication equipment in this embodiment is as follows: Figure 1 As shown, including:

[0045] A communication base station distribution topology is constructed based on the communication base station distribution information in the shore-based communication system, and a position sensor is deployed on the ship. The position sensor is used to sense the ship's navigation track at a specified refresh frequency.

[0046] Obtain an electronic map of the navigation area between the ship's navigation start point and end point, adjust the scale of the electronic map so that the scale of the electronic map is the same as the scale of the communication base station distribution topology, and place the communication base station distribution topology in the electronic map based on the same coordinate axis system; adjust the scale of the ship's navigation track so that the scale of the ship's navigation track is the same as the scale of the communication base station distribution topology, and place the ship's navigation track in the electronic map based on the same coordinate axis system; obtain the ship's communication request in real time, and synchronously obtain the latest electronic map with the communication base station distribution topology and the ship's navigation track placed at the stage when the ship's communication request is issued; obtain the latest position of the ship and the two groups of communication base stations closest to the ship according to the ship's navigation track in the electronic map, set the ship's communication area based on the latest position of the ship, and search for the best communication position in the ship's communication area;

[0047] When setting the ship communication area, it is subject to: the ship communication area is a circular area determined by taking the latest position of the ship in the current electronic map as the center;

[0048] The radius of the ship's communication area is:

[0049]

[0050] Where: r is the radius of the ship communication area; r0 is the radius base; G R , G S , G F is the rainfall, snowfall and fog density in the sea area where the ship is currently located; ω1, ω2, ω3 are weights; G(R) MAX 、G(S) MAX 、G(F) MAX The maximum historical rainfall, snowfall and fog density in the sea area where the ship is currently located;

[0051] Among them, the values ​​of weights ω1, ω2, and ω3 are customized by the user end, and the values ​​of weights ω1, ω2, and ω3 are all between 0.3 and 0.36, and ω1<ω2<ω3, and the radius base r0 is customized by the user end;

[0052] After the ship communication area is set, a grid is configured for the ship communication area synchronously, and all grid points in the ship communication area configured with a grid are used as communication position suitability analysis points, and communication position suitability analysis is performed, and the corresponding position coordinates of a grid point with the highest communication position suitability in the ship communication area are used as the optimal communication position;

[0053] Among them, in the stage of configuring the grid for the ship communication area, the size of the configured grid is set according to the complexity of the terrain of the sea area where the ship communication area is located, so that the higher the complexity of the terrain of the sea area where the ship communication area is located, the smaller the configured grid is, and vice versa, the larger the configured grid is;

[0054] The above logic formula is used to limit the radius of the ship's communication area to ensure that the ship is confined to the designated area when searching for the communication position, thereby ensuring the stable output of the optimal communication position.

[0055] The terrain complexity of the sea area where the ship communication area is located is calculated by the following formula:

[0056]

[0057] Where: θ is the terrain complexity of the sea area where the ship communication area is located; M A M is the total land area in the sea area where the ship communication area is located; all The total area of ​​the sea area where the ship communication area is located; is the total amount of land in the sea area where the ship communication area is located; d(i,i+1) is the distance between the i-th land and the i+1-th land;

[0058] Among them, when performing the analysis operation, the terrain complexity of the sea area where the ship communication area is located is determined first. The target sea area for analysis is a rectangular area defined by the distance between the ship's latest position and the communication base station farthest from the ship in the two groups of communication base stations closest to the ship as the length and the diameter of the ship communication area as the width. The communication base station position and the latest position used to determine the target sea area for analysis are both on the boundary of the rectangular area. A 、M all , d(i,i+1) are all from electronic maps;

[0059] The search logic for the best communication position is expressed as:

[0060]

[0061] Where: K1 j , K2 j is the suitability of the two communication base stations relative to the grid point j; u is the total amount of land intersecting the straight line connecting the communication base station and the grid point; h(v) max is the maximum width of the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; l v is the length of the line segment on the straight line connecting the communication base station and the grid point that is partially blocked by the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; η v L1 is the smoothness of the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; j 、L2 j is the length of the straight line connecting the two communication base stations relative to the grid points;

[0062] Among them, based on the above formula, the suitability of each grid point relative to the two communication base stations is calculated, and the value with the highest suitability is selected for retention. A set is formed by the fitness values ​​corresponding to all grid points, and the maximum value in the set is selected, and the grid point corresponding to the maximum value is taken as the optimal communication position;

[0063] By setting the above logic formula, the terrain complexity of the sea area where the ship communication area is located is calculated to provide support for the operation of configuring the grid of the ship communication area. At the same time, the search logic of the best communication position is further limited to ensure that the best communication position is stably output by the method in this embodiment.

[0064] The smoothness of the mountain and slope is calculated by the following formula:

[0065]

[0066] Where: S is the sum of the absolute values ​​of the height differences between adjacent points; y is the total number of measurement points; d is the horizontal distance between adjacent measurement points;

[0067] Among them, the user selects several groups of measurement points on the mountain and slope, and uses the measurement points to determine S;

[0068] Based on the above formula, data support is provided for the search logic of the optimal communication position.

[0069] The searched best communication position is stored in the position sensor. The ship driver reads the best communication position in the position sensor, drives the ship to the best communication position, and then sends a communication request to the communication base station.

[0070] When a communication request sent by a ship is received by the communication base station, the ship establishes a communication channel with the communication base station.

[0071] In this embodiment, by executing the method in the above embodiment, in the ship communication scenario, a guidance effect is provided for the ship to ensure that the ship can perform communication operations in the best communication position within a limited area, thereby improving communication quality and ensuring communication stability.

[0072] like Figure 1 As shown, the distribution information of the communication base stations in the shore-based communication system is the location information of each communication base station in the shore-based communication system. Each communication base station in the shore-based communication system determines a corresponding point in a three-dimensional space based on its respective location information, and the corresponding points are adjacently connected to each other to construct a distribution topology of the communication base stations;

[0073] The refresh frequency of the location sensor running application is customized by the user. The location information sensed during the location sensor running phase includes: location coordinates, offset angle, offset distance. The location coordinates, offset angle, and offset distance of the location information sensed by the location sensor during the first run are all zero. The location information sensed by the location sensor during the second and subsequent runs are all based on the last sensed location information.

[0074] The position sensor stores the position coordinates of the starting point of the ship's voyage. The position sensor determines the real-time position of the ship based on the position coordinates, offset angle, and offset distance in the sensed position information. The real-time positions of the ship determined continuously are connected to each other to sense the ship's navigation track.

[0075] The electronic map on which the communication base station distribution topology and the ship navigation track are placed is updated in real time based on the refresh frequency of the position sensor, so that the ship navigation track in the electronic map on which the communication base station distribution topology and the ship navigation track are placed is always the latest ship navigation track updated based on the position information perceived by the position sensor.

[0076] Through the above settings, the position information content perceived by the position sensor during the operation phase is limited, and the update operation of the position information content perceived by the position sensor during the operation phase is set to ensure that the electronic map is stably updated to represent the latest ship navigation track.

[0077] like Figure 1 As shown, the ship driving user reads the best communication position in the position sensor, that is, the best communication position is retrieved from the position sensor, and the retrieved best communication position is further moved to the central control panel of the ship and displayed on the electronic map;

[0078] When the ship sends a communication request, it first tries to access any communication base station in the shore-based communication system. When any communication base station cannot be accessed, it then executes the operation of reading the best communication position in the position sensor.

[0079] In summary, during the execution of the method in the above embodiment, the coordination of the communication base station distribution topology, the electronic map of the ship navigation area, and the ship navigation trajectory is completed, so that the communication base station distribution topology and the ship navigation trajectory are both represented in the electronic map, thereby combining the real-time position of the ship and the communication obstacles caused by the land mountains and slopes represented in the electronic map, and searching for the best communication position within the specified range, so as to provide services for ship communications and ensure that during the ship communication process, the ship communication quality can be improved through adjustments based on the ship communication position; at the same time, during the execution stage of the method steps, the ship communication area is effectively constrained based on the specified logic, and combined with the terrain complexity analysis of the sea area where the ship communication area is located, logical support is provided for the final determination of the ship communication position, thereby reducing ship communication interference and improving the quality and stability of ship communications.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A remote maintenance method for ship communication equipment, characterized in that: include: A communication base station distribution topology is constructed based on the communication base station distribution information in the shore-based communication system, and a position sensor is deployed on the ship. The position sensor is used to sense the ship's navigation track at a specified refresh frequency. Obtain an electronic map of the navigation area between the ship's navigation start point and end point, adjust the scale of the electronic map so that the scale of the electronic map is the same as the scale of the communication base station distribution topology, place the communication base station distribution topology in the electronic map based on the same coordinate axis system, adjust the scale of the ship's navigation track so that the scale of the ship's navigation track is the same as the scale of the communication base station distribution topology, and place the ship's navigation track in the electronic map based on the same coordinate axis system; Obtain ship communication requests in real time, and simultaneously obtain the latest electronic map with the distribution topology of communication base stations and ship navigation tracks during the stage when the ship communication requests are issued; According to the ship's navigation track in the electronic map, the latest position of the ship and the two groups of communication base stations closest to the ship are obtained, the ship's communication area is set based on the latest position of the ship, and the best communication position is searched within the ship's communication area; The searched best communication position is stored in the position sensor. The ship driver reads the best communication position in the position sensor, drives the ship to the best communication position, and then sends a communication request to the communication base station; When a communication request sent by a ship is received by the communication base station, the ship establishes a communication channel with the communication base station.

2. A method for remote maintenance of ship communication equipment according to claim 1, characterized in that: The distribution information of the communication base stations in the shore-based communication system is the location information of each communication base station in the shore-based communication system. Each communication base station in the shore-based communication system determines a corresponding point in a three-dimensional space based on its respective location information, and the corresponding points are connected adjacently to each other to construct a distribution topology of the communication base stations. The refresh frequency of the position sensor running application is customized by the user end. The position information sensed during the position sensor running phase includes: position coordinates, offset angle, offset distance. The position coordinates, offset angle, and offset distance in the position information sensed by the position sensor during the first running are all zero. The position information sensed by the position sensor during the second and subsequent running are all based on the last sensed position information as a reference. Among them, the position sensor stores the position coordinates of the starting point of the ship's navigation. The position sensor determines the real-time position of the ship based on the position coordinates, offset angle, and offset distance in the perceived position information. The continuously determined real-time positions of the ship are connected to each other to perceive the ship's navigation trajectory.

3. A method for remote maintenance of ship communication equipment according to claim 1, characterized in that: The electronic map on which the communication base station distribution topology and the ship navigation track are placed is updated in real time based on the refresh frequency of the position sensor, so that the ship navigation track in the electronic map on which the communication base station distribution topology and the ship navigation track are placed is always the latest ship navigation track updated based on the position information perceived by the position sensor.

4. A method for remote maintenance of ship communication equipment according to claim 1, characterized in that: When setting the ship communication area, the ship communication area is subject to: the ship communication area is a circular area determined with the latest position of the ship in the current electronic map as the center; The radius of the ship communication area is: Where: r is the radius of the ship communication area; r0 is the radius base; G R , G S , G F is the rainfall, snowfall and fog density in the sea area where the ship is currently located; ω1, ω2, ω3 are weights; G(R) MAX 、G(S) MAX 、G(F) MAX The maximum historical rainfall, snowfall and fog density in the sea area where the ship is currently located; Among them, the values ​​of weights ω1, ω2, and ω3 are customized by the user end, and the values ​​of weights ω1, ω2, and ω3 are all between 0.3 and 0.36, and ω1<ω2<ω3, and the radius base r0 is customized by the user end.

5. A method for remote maintenance of ship communication equipment according to claim 4, characterized in that: After the ship communication area is set, a grid is synchronously configured for the ship communication area, and grid points in the ship communication area configured with the grid are all used as communication position suitability analysis points, and communication position suitability analysis is performed, and the corresponding position coordinates of a grid point with the highest communication position suitability in the ship communication area are used as the optimal communication position; Among them, in the grid configuration stage for the ship communication area, the size of the configuration grid is set according to the complexity of the terrain of the sea area where the ship communication area is located, so that the higher the complexity of the terrain of the sea area where the ship communication area is located, the smaller the configuration grid is, and vice versa, the larger the configuration grid is.

6. A method for remote maintenance of ship communication equipment according to claim 5, characterized in that: The terrain complexity of the sea area where the ship communication area is located is calculated by the following formula: Where: θ is the terrain complexity of the sea area where the ship communication area is located; M A M is the total land area in the sea area where the ship communication area is located; all The total area of ​​the sea area where the ship communication area is located; is the total amount of land in the sea area where the ship communication area is located; d(i,i+1) is the distance between the i-th land and the i+1-th land; Among them, when performing the analysis operation, the terrain complexity of the sea area where the ship communication area is located is determined first. The target sea area for analysis is a rectangular area defined by the distance between the latest position of the ship and the communication base station farthest from the ship in the two groups of communication base stations closest to the ship as the length and the diameter of the ship communication area as the width, and the communication base station position and the latest position used to determine the target sea area for analysis are both on the boundary of the rectangular area, M A 、M all , d(i,i+1) all come from electronic maps.

7. A method for remote maintenance of ship communication equipment according to claim 6, characterized in that: The search logic of the optimal communication position is expressed as: Where: K1 j , K2 j is the suitability of the two communication base stations relative to the grid point j; u is the total amount of land intersecting the straight line connecting the communication base station and the grid point; h(v) max is the maximum width of the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; l v is the length of the line segment on the straight line connecting the communication base station and the grid point that is partially blocked by the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; η v L1 is the smoothness of the mountain or slope on the vth land that is higher than the location where the ship communication request is sent; j 、L2 j is the length of the straight line connecting the two communication base stations relative to the grid points; Among them, based on the above formula, the suitability of each grid point relative to the two communication base stations is calculated, and the value with the highest suitability is selected to be retained. A set is formed by the fitness values ​​corresponding to all grid points, and the maximum value in the set is selected, and the grid point corresponding to the maximum value is used as the optimal communication position.

8. A method for remote maintenance of ship communication equipment according to claim 7, characterized in that: The smoothness of the mountain and slope is calculated by the following formula: Where: S is the sum of the absolute values ​​of the height differences between adjacent points; y is the total number of measurement points; d is the horizontal distance between adjacent measurement points; Among them, a number of groups of measurement points are selected by the user end on the mountain or slope, and S is determined using the measurement points.

9. A method for remote maintenance of ship communication equipment according to claim 1, characterized in that: The ship driving user reads the best communication position in the position sensor, that is, calls the best communication position in the position sensor, and further moves the called best communication position to the ship's central control panel and displays it on the electronic map.

10. A method for remote maintenance of ship communication equipment according to claim 1, characterized in that: When the ship sends a communication request, it first tries to access any communication base station in the shore-based communication system. When any communication base station cannot be accessed, it then executes the operation of reading the best communication position in the position sensor.

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