KR102460777B1 - Communication apparatus and method for between shore side and ship side - Google Patents

Abstract

The present invention may provide a land-to-ship communication apparatus and method, comprising: a ship communication control unit installed on a ship to transmit a communication file to the land communication unit to a satellite communication unit connected to a communication satellite; a ship positioning unit that periodically collects ship location information through a satellite navigation correction system during the operation of the ship; a weather forecast processing unit that collects weather information for each time and coordinates along a ship's travel route with respect to the ocean to which the ship will operate; The vessel position information collected by the vessel positioning unit, the weather information collected by the weather forecast processing unit, and the transmission speed for each communication file when the communication file is transmitted through the vessel communication control unit are recorded and stored. data management unit; and a weight adjuster configured to increase or decrease or adjust the transmission speed by applying a weight to the transmission speed based on the weather information corresponding to the ship location information of the data management unit at the transmission time of the communication file.

Description

COMMUNICATION APPARATUS AND METHOD FOR BETWEEN SHORE SIDE AND SHIP SIDE

The present invention relates to a land-to-ship communication device and method.

In general, communication networks have been developed from wired connections to TCP/IP-based wired, wireless networks, and satellite communication.

In particular, satellite communication is a communication method that communicates between an earth station and an earth station using a communication satellite floating above the surface of the earth. It is used to provide various communication services and broadcasting services.

The SHF frequency band for satellite communication is usually 1 GHz or more, and since this band occupies most of the frequency band occupied by microwaves, it may be commonly referred to as a microwave.

The function of a communication satellite is similar to that of a relay station in land microwave communication, so it receives a signal emitted from a certain earth station, amplifies it, and retransmits it to another earth station.

That is, in the case of terrestrial microwave communication, since several repeaters are required during transmission for long-distance transmission, communication can be performed with a communication satellite floating as a repeater over the ground in consideration of this point.

In addition, a path through which a transmitting earth station (eg, land or sea) and a receiving earth station are connected through one satellite means a satellite link. A signal from a satellite to another earth station is called a downlink signal.

In the case of geostationary orbit satellites, only three satellites can cover the global communication network except for the polar regions, so communication in a wide range is possible. It has the advantage of being able to communicate by converting it to digital.

Accordingly, communication between the land and the ship is made through a wireless network or satellite communication.

For example, communication between a ship and land according to the prior art uses an inmarsat marine satellite floating on a geostationary orbit.

However, compared to terrestrial communication, satellite communication may have a transmission delay of at least 238ms to maximum 278ms, and in view of the amount and speed of web service traffic of terrestrial communication, it may require a lot of traffic to be used on ships, and the effect of a satellite eclipse When it is difficult to perform communication when receiving radio waves, it is greatly affected by the atmosphere or climate, and when there is solar interference, typhoons, heavy rain, or heavy rain, rain attenuation, which decreases signal strength due to scattering or absorption of satellite radio waves due to water in the air Due to (rainfall attenuation) or atmospheric attenuation (atmosphere attenuation), there is a disadvantage in that communication quality is abnormal or communication is temporarily stopped.

In particular, in unpredicted weather and tsunami accompanied by rain and wind, ships cannot enter the port if there is a tsunami. You may be exposed to accidents due to communication circumstances, such as a major collision.

In addition, a long-distance navigation vessel in the ocean must periodically perform satellite communication with the land control center of the terrestrial base station for possible marine environments and climatic conditions that may occur on the ship's progress path. It may be difficult to receive related safety information, accident information, and weather information from the land control center.

In addition, the condition of the satellite communication network may be important in order to transmit data on land during the vessel's voyage.

There are satellite communication shaded areas within the vessel's route (eg, vessel operation section), and there are many sections with poor communication conditions.

In addition, there are problems in that a communication file to be transmitted over land can be created periodically, and there are many cases of failure when trying to transmit a file having a large file size, and files to be transmitted are continuously accumulated.

In addition, when a ship attempts to transmit data or files in a situation such as satellite communication failure or interruption, it has the disadvantage of wasting only time trying to communicate without considering the weather and marine environment. By actively adjusting the communication speed in consideration of the size of the desired file, communication speed, weather conditions according to the location of the vessel, etc., or by dividing and compressing the file size, the There is an urgent need for technological development.

In the present invention, the transmission speed is increased or decreased based on the ship location information such as latitude and longitude of the current ship and the weather information at the current location, or in the case of a long-distance marine reciprocating ship, in consideration of successful communication cases in the same weather at the same location in the past By adjusting the communication speed or by adjusting the compression ratio like dividing and compressing the file size into transmittable file sizes, the success rate of file transmission can be increased, and the communication computer that uses a firewall switching hub or communicates with the communication satellite By monitoring the communication of other target computers in the ship, when connecting to the Internet network through the satellite between the ship and the land, it is possible to prevent An object of the present invention is to provide an apparatus and method for communication between ships.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

In order to solve the above problems, the present invention provides a communication control unit installed on a ship to transmit a communication file to a land communication unit to a satellite communication unit connected to a communication satellite; a ship positioning unit that periodically collects ship location information through a satellite navigation correction system during the operation of the ship; a weather forecast processing unit that collects weather information for each time and coordinates along a ship's travel route with respect to the ocean to which the ship will operate; The vessel position information collected by the vessel positioning unit, the weather information collected by the weather forecast processing unit, and the transmission speed for each communication file when the communication file is transmitted through the vessel communication control unit are recorded and stored. data management unit; and a weight adjuster configured to add or decrease the transmission speed by applying a weight to the transmission speed based on the weather information corresponding to the ship location information of the data management unit at the time of transmission of the communication file. A communication device may be provided.

In addition, the vessel communication control unit, at the time of transmission of the communication file, if the weather is bad based on the weather information for each vessel location information of the vessel, it is determined that the communication state is lower than that of the normal weather condition, and the communication file Transmission of the communication file may be attempted by increasing the split compression ratio for .

In addition, the data management unit is connected to the vessel communication control unit, the vessel positioning unit, the weather forecast processing unit, and the weight application unit so as to be accessible, and has a relationship with the vessel position information or the weather information. , transmission speed information, transmission file information, and transmission success information in the form of a database can be recorded and managed in the storage device of the data management unit by time or by event.

In addition, in the ship communication control unit, fog, rainfall, snowfall, wind direction, wind speed, wave height, wave period, atmospheric pressure, temperature by a plurality of measuring equipment provided in the ship so as to generate a marine environment correction value to be used for determining the transmission speed. A marine environment measurement unit that measures the

In addition, according to another aspect of the present invention, to transmit a file for communication to the land communication unit through the communication satellite, the ship communication control unit installed on the ship connecting to the communication satellite; collecting vessel position information periodically by a satellite navigation correction system of a vessel positioning unit during operation of the vessel; collecting weather information for each time and coordinates by a weather forecasting unit along the ship's course of the ship; The transmission speed is monitored based on the weather information and transmission speed information that match the ship location information, and the transmission speed is calculated by adding a weight applied to the previous data transmission speed and a weighted value to the previous successful transmission speed. determining step; transmitting the communication file at the predetermined transmission rate; and when the transmission of the communication file to the land communication unit is successful through the communication satellite at the predetermined transmission rate, transmission success information having a searchable success transmission rate for each of the ship location information and the weather information is transmitted by the data management unit. A method of communication between land and ship including the step of being stored in a storage device may be provided.

In addition, the step of transmitting the communication file at the predetermined transmission rate may include: calculating the transmission rate of the transmission successful file by the data management unit and removing the transmission successful file from the transmission folder; sorting the communication files in the transmission folder in the order of recent creation by the data management unit; trying to transmit the communication file by monitoring whether the most recent communication file in the transmission folder can be transmitted within a specific time; and if transmission is not possible within the specific time, dividing and compressing the file size into a transmittable file size, and attempting to transmit the divided and compressed file.

According to the apparatus and method for communication between land and ship according to an embodiment of the present invention, satellite communication through a data management unit that records and manages ship location information, weather information, marine environment information, transmission speed information, transmission file information, and transmission success information It has the advantage of realizing reliable file transfer by increasing or decreasing the transmission speed and adjusting the division and compression ratio.

In addition, according to the apparatus and method for communication between land and ship according to an embodiment of the present invention, the ship communication control unit may be composed of a communication computer that performs satellite communication and a target computer used inside the ship, and when connecting them through a network, fire There is an advantage of improving communication security performance in a ship by using a wall switching hub or monitoring communication between a communication computer and a target computer.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art from the following description. will be.

1 is a block diagram of a communication device between land and ship according to an embodiment of the present invention.
FIG. 2 is a flowchart of a method for communication between land and ships implemented by the apparatus shown in FIG. 1 .
FIG. 3 is a detailed flowchart of a file transmission step for communication shown in FIG. 2 .
FIG. 4 is a detailed flowchart of a step of attempting to transmit a file for communication shown in FIG. 3 .

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION The detailed description set forth below in conjunction with the appended drawings is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

In order to clearly explain the present invention in the drawings, parts irrelevant to the description may be omitted, and the same reference numerals may be used for the same or similar components throughout the specification.

In the drawings, FIG. 1 is a configuration diagram of a communication device between land and ship according to an embodiment of the present invention.

Referring to FIG. 1 , the land-to-ship communication device 10 includes a ship communication means 11 that may be provided in a ship, such as a system connected largely systematically, a land communication means 12 that may be provided on land, and a communication satellite 13 connecting these means 11 and 12 to a satellite communication network.

In more detail, the land-to-ship communication device 10 is a component of the ship communication means 11 , and includes a ship communication control unit 100 , a satellite communication unit 110 , a weather forecast processing unit 120 , and a ship positioning unit 130 . , the marine environment measurement unit 140 , the weight adjustment unit 150 , the data management unit 160 , and the storage device 167 .

The ship communication means 11 and the land communication means 12 are EPIRB (Emergency Position Indicating Radio Beacon), NBDP (Narrow Band Direct Printing Telegraphy) equipment, which are satellite-using equipment to provide distress communication, safety communication, navigation warning, and weather information. , GMDSS (global maritime distress and safety system) including maritime satellite communication equipment (INMARSAT-C), fishing vessel comprehensive control system (V-Pass), maritime safety and security, and navigation from pier to pier for marine environment protection and e-Navigation systems that process the collection, integration, exchange, expression and analysis of marine information, satellite antennas, communication computers equipped with satellite transmission/reception cards, and satellite communication equipment for land control centers, so limited to specific devices it may not be

For example, the ship communication means 11 according to the present embodiment includes a firewall switching hub (not shown) and a communication computer that is connected to the firewall switching hub and can be linked with the satellite-using equipment to communicate with the communication satellite 13 . (eg, onboard computer) and other target computers on board (eg, a computer for networking to operate equipment on board or a user computer for Internet use).

In addition, the ship communication means 11 may include a software means capable of monitoring (eg, comparison check and analysis) a cyber attack when accessing the Internet network through a satellite between the ship and the land through the target computer and the communication computer, In this case, the effect of preventing the target computer inside the ship from being exposed to the onshore Ethernet network and becoming vulnerable in terms of security can be exhibited.

The land communication means 12 is a land communication unit 20 provided on land so as to receive a communication file from the ship communication means provided on the ship, including a server facility of the land control center or a computer capable of satellite communication, a satellite antenna, etc. can

For example, the land communication unit 20 may collectively refer to an unillustrated land-based satellite communication network facility, a control station, a reference station, and a server and a comforter of a land control center.

The communication satellite 13 is connected between the ship communication means 11 and the land communication means 12, and a protocol for satellite communication (eg, Statistical Multi-Channel MAC Protocol) or an Internet protocol (eg, FTP (file transfer protocol), It may refer to a geo-stationary orbit satellite that supports HTTP (Hypertext transfer protocol) and RDP (remote desktop protocol) and commercial satellites that provide other ship-related satellite communication services.

In more detail, the communication computer as the ship communication means 11 may be configured in the form of an additional device (not shown) related to the ship communication control unit 100 and satellite communication.

The ship communication control unit 100 transmits a communication file to the land communication unit 20 with the satellite communication unit 110 connected to the communication satellite 13, or is installed on the ship to receive a communication signal or data from the communication satellite 13. there may be

The vessel positioning unit 130 is connected to the vessel communication control unit 100 and may serve to periodically collect the vessel position information 161 to the satellite navigation correction system during the operation of the vessel.

The satellite navigation correction system may refer to a device that can be mounted on a ship to process DGPS (Differential GPS: Differential Position Information).

Here, DGPS (Differential GPS) can correct position data whose accuracy is lowered due to an error code as much as possible.

That is, the DGPS refers to a reference station that knows the exact location data to inform the error part of the location data received from the satellite.

The ship positioning unit 130 having a DGPS configuration is connected to the DGPS control station and the reference station (Reference Station / DGPS Site) in charge of transmitting the DGPS correction value, etc., and improves the positioning accuracy through the received correction value. have the advantage of being able to

The weather forecast processing unit 120 is connected to the ship communication control unit 100, and serves to collect weather information for each time and coordinates along the ship's route for the ocean to be operated by the ship.

The data management unit 160 transmits the ship position information collected by the vessel positioning unit 130 , the weather information collected by the weather forecast processing unit 120 , and the communication file through the vessel communication control unit 100 . It can play a role of recording and storing the transmission speed for each file for communication and providing the search result to the ship communication control unit 100 and the weight adjustment unit 150 .

In addition, the data management unit 160 is accessible to the ship communication control unit 100, the vessel positioning unit 130, the weather forecast processing unit 120, the marine environment measurement unit 140, and the weight application unit 150, The marine environment information 163, the transmission speed information 164, the transmission file information 165, and the transmission success information 166 having a relationship with the ship location information 161 or the weather information 162 are described above in the form of a database. The storage device 167 of the data management unit may play a role of managing records by time or by event.

For example, the transmission file information 165 may include data and information identifiers for storing, sorting, deleting, and modifying communication files through a transmission folder.

In addition, the data management unit 160 may also play a role of storing the past successful transmission rate in the transmission success information 166 .

Here, in the case of a ship that travels to and from the ocean along the ship's route, the ship location information 161, the weather information 162, and the transmission speed information 164 are stored in the storage device 167 of the data management unit 160 in real time. It can be recorded and managed in the form of history information.

That is, the past success transfer rate may mean a transfer rate recorded when the file transfer is successful by transmitting it in the same or similar location and in the same or similar weather among the history information collected and recorded while the ship has operated in the past.

This past successful transmission rate may be recorded and managed in the transmission success information 166 through the data management unit 160 or may be searchable and usable speed data.

The weight adjustment unit 150 applies a weight to the transmission speed of the communication file when the communication file is transmitted based on weather information corresponding to the ship location information that can be recorded and managed in the data management unit 160 at the time of transmission of the communication file. By applying the application to increase or decrease or adjust the transmission speed, the satellite communication success rate can be increased and the time required for communication success can be shortened.

In addition, at the time of transmission of the communication file, the ship communication control unit 100 determines that if the weather is bad based on the weather information for each ship location information of the ship, the communication status is lower than that of the normal weather condition, and divides the communication file It may also play a role of attempting to transmit the communication file by increasing the compression ratio.

In addition, the above-mentioned marine environment measurement unit 140 may be connected to the ship communication control unit 100 .

The marine environment measurement unit 140 generates a marine environment correction value to be used for determining the transmission speed of the communication file to be transmitted to the land communication unit 20 through the communication satellite 13 during the operation of the vessel, a plurality of measuring equipment provided in the vessel It may consist of a device and an operating program for measuring fog, rainfall, snowfall, wind direction, wind speed, wave height, wave period, atmospheric pressure, and temperature by (not shown).

Hereinafter, a communication method according to the device configuration described above will be described.

FIG. 2 is a flowchart of a communication method between land and ship implemented by the apparatus shown in FIG. 1, FIG. 3 is a detailed flowchart of the communication file transfer step shown in FIG. 2, and FIG. 4 is a communication file shown in FIG. It is a detailed flowchart of the transmission attempt phase.

Referring to FIG. 2 , a step (not shown) in which the ship communication control unit installed on the ship connects to the communication satellite may first be started so as to transmit the communication file to the land communication unit through the communication satellite.

Various step-by-step descriptions to be described later, including the step of connecting to the communication satellite, may be automatically performed by a program set in the memory (not shown) of the ship communication control unit 100 .

Connection of communication satellites or adjustment of transmission speed (eg, weight application) may be performed periodically or automatically according to a predetermined time, or may be performed when a communication connection event occurs by a user.

Thereafter, during the operation of the vessel, a step (S100) of periodically collecting vessel position information by the satellite navigation correction system of the vessel positioning unit may be performed.

In addition, the step (S200) of collecting weather information for each time and coordinates by the weather forecasting unit along the ship's progress path may be performed.

On the other hand, during the operation of the ship, in order to correct more accurate weather information and weather information, the step (S300) of collecting marine environment information around the ship for each current ship location information by the marine environment measurement unit may be further performed.

The marine environment information around the vessel directly collected from the vessel can be used as a correction value for weather information or when adjusting the transmission speed in the form of a marine environment correction value.

The transmission speed is monitored (eg, compared, checked and analyzed) based on the weather information and the transmission speed information matched with the ship location information (S400). It can be maintained the same as (S550).

However, in order to overcome the changed satellite communication environment due to various reasons such as deterioration of the weather environment at the ship's location or rainfall attenuation or atmospheric attenuation analyzed according to the collected weather information, sunspot explosion, etc. When it is necessary to adjust the transmission speed based on the matching weather information, marine environment information, and transmission speed information, a weight applied to the previous data transmission rate (eg, the first value) and a value obtained by applying a weight to the previous successful transmission rate (eg, the second value) may be used to determine the transmission speed.

Alternatively, a value obtained by adding a weight to the previous data transfer rate, a weighted value to the previous successful transfer rate, and a value applied a dissolution environment correction value to the immediately preceding data transfer rate (e.g., the third value) is used to determine the transfer rate. Step S500 may be performed.

Since the data transfer rate just before the bad weather is the transferred file size divided by the transfer time, for example, if a 16 KB file is transferred in 2 minutes, the transfer rate may be 8 KB per minute.

However, when it is predicted that normal communication or communication at the existing transmission speed is not possible in consideration of the current vessel location information, weather information, or marine environment information, the transmission speed may be adjusted.

That is, the corrected or adjusted transmission rate is 2.4KB/min (eg, the first value) calculated by applying a weight of 30% to the previous data transmission rate (eg, multiplied by 0.3), ship location information, weather information, and transmission As can be seen through the search for success information and transmission speed information, a weight of 70 to the past successful transmission speed (eg 6 KB/min) corresponding to a case in which the transmission of the communication file was successful in the same or similar weather as the current ship. By adding 4.2 KB/min (eg, the second value) calculated by applying % (eg, multiplying by 0.7), the result may be 6.6 KB/min, which is the sum of the first value and the second value.

Here, since the weight or the marine environment correction value may be determined through statistical data analysis data or big data analysis data or simulation, it may not be limited to a specific value.

In addition, since the full speed of the communication file is determined by reflecting the weather for each location of the vessel and the past communication success results, as a result, there is an advantage in that the satellite communication success rate of the current vessel can be reliably secured.

In addition, the step (S600) of transmitting the communication file at the transmission rate determined as described above may be performed through the ship communication control unit 100 and the satellite communication unit 110 of FIG. 1 described above.

In addition, the result of the communication file being normally transmitted to the land communication unit 20 on land is stored by the storage device 167 of the data management unit in the form of transmission success information (S700) to determine or adjust the transmission speed later can be used to

In the step (S700) stored by the storage device 167, when the transmission of the communication file to the land communication unit 20 through the communication satellite 13 at the predetermined transmission rate is successful, the ship position information 161 at that time ) and the weather information 162 , it may mean that the transmission success information 166 having a searchable success transmission rate is stored in the storage device 167 by the data management unit 160 .

Referring to FIG. 3, in the step (S600) of transmitting the file for communication at the predetermined transmission rate described above, the data management unit calculates the transmission rate of the transmission successful file, and removing the transmission successful file from the transmission folder (S610, S611, S612) may be performed.

However, if the transmission file is not in the transmission folder due to transmission failure, the data management unit may perform a step ( S620 ) of sorting the communication files in the transmission folder in the order of the most recent generation.

That is, the vessel may miss a predetermined communication timing during transmission attempt or transmission failure, and when the latest updated communication file is further generated, it is necessary to prevent retransmission of the past communication file.

Therefore, when retransmission is attempted, an advantage of being able to reliably transmit the latest communication file over land may occur by sorting in the order of the most recent fish.

At this time, the steps (S630 and S640) of trying to transmit the communication file by monitoring whether the most recent communication file in the transmission folder can be transmitted within a specific time (eg, 4 minutes) may be performed.

Here, the characteristic time may mean an interval for satellite access and communication, and is selected from 1 second to 5 minutes in consideration of a typical location-related satellite update interval (eg, 8 steps from 1 second to 5 minutes). It may be any one time, and may not be a fixed value only as a time setting value that can be selectively determined.

Referring to FIG. 4, even in the transmission attempt (S640, S641) of the communication file before division, the communication files in the transmission folder are arranged in the order of the smallest data size (S642), and the communication file is transmitted based on the smallest data size. An attempt process ( S643 ) may be performed.

In addition, if transmission is not possible within a specific time, dividing and compressing the file size to a transmittable file size (S631), and adjusting the division compression ratio to increase the division compression ratio, a step of trying to transmit the divided and compressed file (S632) may be performed. .

That is, when transmitting a file for communication, the transmission speed (eg, communication speed) is measured, the file is divided and compressed enough to transmit data within a certain period of time, and the file size is reduced by transmitting the divided file size according to the communication speed. Time-consuming cases of trying to send large files and eventually failing can be greatly improved.

And, after all transmission attempts, a process of checking the success of transmission to land (S650, S633) or a process of checking whether all divided files have been transmitted and performing a repeated attempt as a result of the check (S634) may be performed, so it is repeated There is an advantage in that the probability of success can be increased by trial and reliability of communication quality can be secured.

The embodiments of the present invention disclosed in the present specification and drawings are merely provided for specific examples in order to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention.

Therefore, the scope of the present invention should be construed as including all changes or modifications derived based on the technical spirit of the present invention in addition to the embodiments disclosed herein are included in the scope of the present invention.

100: ship communication control unit 110: satellite communication unit
120: weather forecast processing unit 130: ship positioning unit
140: marine environment measurement unit 150: weight adjustment unit
160: data management unit 167: storage device

Claims (4)

Ship communication control unit installed on the ship to transmit the communication file;
a vessel positioning unit for collecting vessel position information during the operation of the vessel;
a weather forecast processing unit for collecting weather information for each time and coordinates along the course of the vessel;
a marine environment measurement unit for collecting marine environment information obtained by measuring at least one of fog, rainfall, snowfall, wind direction, wind speed, wave height, wave period, atmospheric pressure, and temperature around the ship;
a data management unit for storing the vessel location information, the weather information, the marine environment information, and transmission speed information when the communication file is successfully transmitted through the vessel communication control unit; and
and a weight adjustment unit for determining a weight based on weather information corresponding to the ship location information;
The ship communication control unit,
When the transmission of the communication file fails by controlling the weight adjustment unit, the weight is corrected by adjusting the weather information using the marine environment information, and the value obtained by applying the corrected weight to the transmission speed of the immediately preceding communication file and the A land-to-ship communication device for retransmitting the communication file at the retransmission rate after calculating a retransmission rate by adding a value obtained by applying a corrected weight to a past success rate at a location corresponding to a ship and weather.
The method of claim 1,
The ship communication control unit,
At the time of transmission of the communication file, if the weather is not good based on the weather information for each vessel location information of the vessel, it is determined that the communication condition is lower than that of the normal weather condition, and the divisional compression ratio for the communication file is increased and the A land-to-ship communication device that attempts to transmit a communication file.
delete delete

Images