KR102365627B1 - System and method for maritime wireless communication - Google Patents

Abstract

The present invention relates to a maritime wireless communication system and method, and more particularly, to a maritime wireless communication system and method for transmitting and receiving messages between a service center and a ship station.
A maritime wireless communication system according to an embodiment of the present invention is a maritime wireless communication system for transmitting and receiving messages between a service center and a ship station, wherein the ship station transmits a request message to the service center via a coast station, The service center generates a response message including shipping station identification information for identifying the shipping station, and transmits the generated response message to the ship via the coast station according to the coast station identification information for identifying the coast station. send to the station

Description

Maritime wireless communication system and method

The present invention relates to a maritime wireless communication system and method, and more particularly, to a maritime wireless communication system and method for transmitting and receiving messages between a service center and a ship station.

The International Maritime Organization (IMO) uses the terrestrial radio communication link of the Very High Frequency Data Exchange System (hereinafter referred to as VDES) in accordance with the development of wireless communication for e-Navigation (e-Navigation). ) to establish standards for providing services.

Meanwhile, in Korea, a Korean-style e-navigation service is being developed through the Smart-Navigation project. Here, the message transmitted and received by the e-navigation service basically uses TCP/IP-based HTTP (Hypertext Transfer Protocol), and includes data in GML format according to the maritime data exchange standard (S-100).

The e-navigation service message is generated in the service center and transmitted to the ship station via the coast station using the VDES communication network. However, in the conventional maritime wireless communication system, since the TCT/IP connection between the coast station and the ship station is cut off, a separate device for interworking the non-TCP/IP section is absolutely necessary. In addition, in the prior art, there is no technical consideration on which route the e-navigation service message should be transmitted to the ship station, so there is a problem in that it is difficult to effectively transmit the generated e-navigation service message.

KR 10-1858553 B1

The present invention provides a maritime wireless communication system and method capable of transmitting and receiving messages by establishing a wireless communication link between a service center and a ship station.

A maritime wireless communication system according to an embodiment of the present invention is a maritime wireless communication system for transmitting and receiving messages between a service center and a ship station, wherein the ship station transmits a request message to the service center via a coast station, The service center generates a response message including shipping station identification information for identifying the shipping station, and transmits the generated response message to the ship via the coast station according to the coast station identification information for identifying the coast station. send to the station

In addition, the maritime wireless communication system according to an embodiment of the present invention, a ship station for generating a request message to be transmitted to a service center; a coast station for receiving a request message from the ship station and transmitting it to the service center; and receiving the request message from the coast station, generating a response message including ship station identification information for identifying the ship station, and using the generated response message according to the coast station identification information for identifying the coast station. It may include; a service center for transmitting to the ship station via the coast station.

The coast station identification information and the ship station identification information may be extracted from a request message transmitted to the service center.

A plurality of the coast stations may be provided to communicate with the service center, respectively, and at least one of the ship stations may be provided in plurality to communicate with each coast station.

The service center may include: a service host for generating a response message to the request message received from the ship station; and a coast station gateway configured to receive a response message from the service host and transmit the response message to the coast station.

The coast station gateway may include: a request message receiver configured to receive a request message from the coast station; an information generating unit for generating the coast station identification information and the ship station identification information from the request message received from the request message receiving unit; a storage unit for storing the coast station identification information and the ship station identification information; a request message transmitting unit for transmitting a request message via the information generating unit to the service center; a response message receiving unit for receiving a response message from the service host; an information processing unit for extracting the coast station identification information according to the ship station identification information from the information generation unit; and a response message transmitter configured to transmit the response message to the coast station according to the coast station identification information and the ship station identification information.

The storage unit may store matching information in which the coast station identification information and the ship station identification information are matched with each other.

The storage unit may update previously stored matching information when the coast station identification information and the ship station identification information input from the information generator are different from previously stored matching information.

On the other hand, the maritime wireless communication method according to an embodiment of the present invention is a maritime wireless communication method for a service center to transmit and receive messages with a ship station. The coast station identification information for identification and the shipping station identification information for identifying the ship station are extracted, and the generated response message is extracted from the ship station via the coast station according to the extracted coast station identification information and the ship station identification information. send to

In addition, a maritime wireless communication method according to an embodiment of the present invention is a maritime wireless communication method for a service center to transmit and receive a message to and from a ship station, comprising: receiving a request message from the ship station via a coast station; extracting coast station identification information for identifying the coast station and shipping station identification information for identifying the ship station from the request message; and transmitting the generated response message to the coast station according to the extracted coast station identification information and ship station identification information.

The request message includes a Hypertext Transfer Protocol (HTTP) message, and the process of extracting the coast station identification information and the ship station identification information includes extracting the coast station identification information by identifying the coast station that has transmitted the request message; , it is possible to extract the ship station identification information by checking the header of the HTTP message.

The coast station identification information may include Internet Protocol (IP) address information of the coast station, and the shipping station identification information may include Maritime Resource Name (MRN) information of the shipping station.

The method further comprising: storing the extracted coast station identification information and the ship station identification information; wherein the storing of the coast station identification information and the ship station identification information may include mutually comparing the coast station identification information and the ship station identification information generating matching information by matching; and storing the generated matching information.

The storing of the coast station identification information and the ship station identification information may include: checking whether the generated matching information is different from matching information stored in advance; and updating the previously stored matching information when the generated matching information is different from the previously stored matching information.

The transmitting to the coast station may include: generating a response message including the ship station identification information; and transmitting the response message to the coast station according to the coast station identification information matched with the ship station identification information.

According to the maritime wireless communication system and method according to an embodiment of the present invention, a message can be effectively transmitted/received between the service center and the ship station through the established wireless communication link.

In addition, even when a plurality of coast stations communicate with a plurality of ship stations, messages can be transmitted and received through the established wireless communication link, and even when the coast stations to be connected are changed due to the movement of the ship stations, the service center does not lose the messages. communication between the ship station and the ship station can be maintained.

1 is a view for explaining a maritime wireless communication system.
2 is a diagram schematically showing a maritime wireless communication system according to an embodiment of the present invention.
3 is a diagram schematically illustrating a coast station gateway according to an embodiment of the present invention.
4 is a diagram illustrating an example of a request message received by a service center;
5 is a diagram illustrating matching information in which coast station identification information and ship station identification information are matched with each other;
6 is a diagram illustrating an example of a response message transmitted by a service center;
7 is a diagram schematically illustrating a maritime wireless communication method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the embodiments of the present invention allow the disclosure of the present invention to be complete, and the scope of the invention to those of ordinary skill in the art It is provided to fully inform In order to describe the invention in detail, the drawings may be exaggerated, and like reference numerals refer to like elements in the drawings.

1 is a diagram for explaining a maritime wireless communication system.

As shown in FIG. 1 , the maritime wireless communication system may include a service center 100 , a coast station 200 , and a ship station 300 . Here, the service center 100 provides an e-navigation service through the Internet. On the other hand, the coast station 200 means a communication device installed on the coast to control the ship station 300 in a very high frequency band and connected to a network, and the ship station 300 is an ultra high frequency band mobile communication device mounted on a ship. can mean

Here, the shipping station 300 periodically polls to check whether there is a message to be received from the service center 100 . Polling is accomplished by generating a message from the ship station 300 . That is, the message transmitted from the ship station 300 is transmitted to the coast station 200 according to HTTP (Hypertext Transfer Protocol), and the message transmission from the ship station 300 to the coast station 200 is VDES (VHF Data Exchange). System) is done using the communication network. At this time, the coast station 200 receives the message from the ship station 300 and transmits it to the service center 100 , and the message transmission from the coast station 200 to the service center 100 is TCP/ It is done according to IP.

Meanwhile, the service center 100 generates a message for the e-navigation service and transmits it to the coast station 200 . A plurality of coast stations 200 are provided to each communicate with the service center 100 , receive a message from the service center 100 , and transmit the received message to the shipping station 300 . A plurality of shipping stations 300 are provided to communicate with each coast station 200 , and receive messages generated from the service center 100 and transmitted via the coast station 200 . Hereinafter, for convenience of explanation, a message transmitted from the shipping station 300 to the service center 100 is defined as a request message, and a message transmitted from the service center 100 to the shipping station 300 is defined as a response message. decide to do

2 is a diagram schematically illustrating a maritime wireless communication system according to an embodiment of the present invention.

Referring to FIG. 2 , a wireless communication system according to an embodiment of the present invention is a maritime wireless communication system for transmitting and receiving messages between a service center 100 and a shipping station 300 , wherein the shipping station 300 is a coast station. Transmits a request message to the service center 100 via 200 , and the service center 100 generates and generates a response message including shipping station identification information for identifying the shipping station 300 . The received response message is transmitted to the ship station 300 via the coast station 200 according to the coast station identification information for identifying the coast station 200 .

That is, in the wireless communication system according to an embodiment of the present invention, the shipping station 300 for generating a request message to be transmitted to the service center 100 , and receiving the request message from the shipping station 300 , the service center 100 ), receiving a request message from the coast station 200 and the coast station 200, generating a response message including ship station identification information for identifying the ship station 100, and generating a response and a service center 100 for transmitting a message to the ship station 300 via the coast station 200 according to coast station identification information for identifying the coast station 200 .

Here, the service by message transmission/reception between the service center 100 and the shipping station 300 may be an e-navigation service for which a standard has been established by the International Maritime Organization (IMO). Such an e-navigation service transmits and receives a message using HTTP (Hypertext Transfer Protocol) based on TCP/IP, and the transmitted and received message may include data in GML format according to the maritime data exchange standard (S-100). .

The shipping station 300 generates a request message to be transmitted to the service center 100 . Although not shown, such a ship station 300 may include a VDES mobile station, a ship station gateway, and an e-navigation service client.

The VDES mobile station transmits/receives data to and from a VEDS base station, which will be described later, using wireless communication. That is, the DES mobile station may transmit/receive a VDES message to and from a VEDS base station, which will be described later, using wireless communication.

The ship station gateway interprets the HTTP message received from the e-navigation service client to construct a message for transmission to the coast station gateway 120, or interprets the received message to generate a response message according to HTTP, and then -Send to the navigation service client. For example, the shipping station gateway may receive a message according to HTTP from the connected e-navigation service client, convert the received message into a message according to the VDES wireless communication protocol, and transmit the converted message to the connected VDES mobile station. And, the shipping station gateway may receive a message according to the VDES wireless communication protocol from the connected VDES mobile station, convert the received message into a message according to HTTP, and transmit the converted message to the connected e-navigation service client. For example, the interface between the VDES mobile station and the ship station gateway may be formed based on UDP (IEC 61162-450).

The e-navigation service client exchanges HTTP-based VDES service messages with an external device, provides a seamless roaming function between heterogeneous communication networks, and logs or processes data. For example, the interface between the e-navigation service client and the ship station gateway may be formed based on HTTP.

The coast station 200 may include a plurality of VDES base stations. The VDES base station may transmit/receive data to and from the VDES mobile station using wireless communication.

The service center 100 receives the request message from the coast station 200 , generates a response message including shipping station identification information for identifying the shipping station 300 , and transmits the generated response message to the coast station ( 200) to the ship station 300 via the coast station 200 according to the coast station identification information for identifying the information. Here, the service center 100 receives a response message from the service host 110 and the service host 110 for generating a response message to the request message received from the shipping station 300, and sends the response message to the and a coast station gateway 120 for transmitting to the coast station 200 . In this case, the coast station identification information and the ship station identification information may be extracted from the request message transmitted to the service center 100 .

The service host 110 is a device that provides e-navigation data according to the maritime data exchange standard (S-100), and may receive data through an HTTP request from an external device.

The coast station gateway 120 interprets the message received from the shipping station 300 to generate an HTTP request message. The generated request message is transmitted to the service center 100 and is obtained as maritime data information. Also, when receiving the request message from the shipping station 300 , the coast station gateway 120 configures a routing table using the shipping station identification information. When transmitting a message to the shipping station 300 , the coast station gateway 120 determines through which route the message should be transmitted to the shipping station 300 by referring to a routing table.

3 is a diagram schematically illustrating a coast station gateway 120 according to an embodiment of the present invention.

Referring to FIG. 3 , in the coast station gateway 120 according to an embodiment of the present invention, a request message receiver 121 for receiving a request message from the coast station 200 and a request message received from the request message receiver An information generator 122 for generating the coast station identification information and the ship station identification information, a storage 123 for storing the coast station identification information and the ship station identification information, and the information generator 122 A request message transmitting unit 124 for transmitting a request message to the service center 100 via information processing unit 126 for extracting the coast station identification information according to the ship station identification information from the It may include a message transmitter 127 .

The request message receiving unit 121 receives a request message from the coast station 200 . The request message receiving unit 121 receives a message from the coast station VDES transceiver and, if necessary, reassembles or converts it into a message format that can be processed inside the coast station gateway 120 through an analysis process. The converted message format may be implemented in JSON, XML, or various other methods.

The information generator 122 generates the coast station identification information and the ship station identification information from the request message received from the receiver. The information generating unit 122 generates routing information in the storage unit 123 or updates existing information by using the Maritime Resource Name (MRN) included in the request message and identification information of the VDES transceiver of the coast station that has received the message.

The request message transmitter 124 transmits a request message via the information generator 122 to the service center 100 . The request message transmitter 124 generates the message converted by the request message receiver 121 as a request message according to the HTTP protocol again, and then transmits it to the service host 110 .

The response message receiving unit 125 receives a first response message from the service host 110 . In this case, the response message receiving unit 125 may interpret the HTTP response message received from the service host 110 and convert it into information that can be processed inside the gateway.

The information processing unit 126 extracts the coast station identification information according to the ship station identification information from the information generation unit 122 . The information processing unit 126 extracts routing information on which coast station 200 a response message should be transmitted to by using a transmission target Maritime Resource Name (MRN) from among the information converted by the response message receiving unit 125 .

The response message transmitter 127 transmits a response message to the coast station 200 according to the coast station identification information and the ship station identification information. The response message transmitter 127 transmits the response message to the coast station 200, for example, the VDES transceiver, using the message and routing information transmitted from the information processing unit 126 .

Hereinafter, a process of generating a response message and transmitting the generated response message to the coast station 200 according to the coast station identification information and the ship station identification information will be described in detail with reference to FIGS. 4 to 6 .

4 is a diagram illustrating an example of a request message received by the service center 100 . 5 is a diagram illustrating matching information in which coast station identification information and ship station identification information are matched with each other, and FIG. 6 is a diagram illustrating an example of a response message transmitted by the service center 100 .

The e-navigation service client periodically transmits a polling request to check whether there is a message to be received from the service host 110 . This polling request message is requested according to the HTTP protocol. The polling request is transmitted through the VDES communication network and transmitted to the service host 110, and when the service host 110 has a message to be transmitted to the shipping station 300 having the polling request, the e-navigation service according to the HTTP response protocol format passed to the client. Even when there is a message to be transmitted from the e-navigation service client to the service host 110 or another shipping station 300, the message is transmitted to the service host 110 according to the HTTP protocol, and the target shipping station 300 uses a polling command. take this message

As shown in FIG. 4, when transmitting a message according to the HTTP protocol, the header of the HTTP message specifies the unique identifier of the shipping station 300 that sent the message in the srcMRN field and transmits it, and the target service or target shipping station ( 300) is specified in the dstMRN field and transmitted. In FIG. 4 , the names of srcMRN and dstMRN and the notation format of the included MRN are examples of implementation, and it goes without saying that they may be expressed in various ways.

In wireless communication between the ship station 300 and the coast station 200 , one coast station 200 may transmit/receive data to and from a plurality of ship station VDES mobile stations through wireless communication. The ship station 300 is connected to and communicates with one coast station VDES transceiver among a plurality of coast station VDES transceivers. It can be connected to a station VDES transceiver.

The coast station gateway 120 is connected to a plurality of coast station VDES transceivers through a network capable of transmitting and receiving data in a manner such as TCP/IP or UDP. Request data received by all coast station VDES transceivers are transmitted to and processed by coast station gateway 120 . All data received from the coast station VDES are processed by the request message receiving unit 121 of the coast station gateway 120 . In the request message, each coast station 200 can be identified together with a message to be transmitted to the service center 100 . contains identification information. Here, the IP address is used as the coast station identification information that can identify the coast station 200, but this is an example for implementing the invention, and it goes without saying that the coast station identification information can be realized in various ways.

The request message receiving unit 121 interprets the data received through the coast station 200 to recover the message sent by the shipping station 300 . This message includes srcMRN and dstMRN included in the HTTP message generated by the shipping station 300, where srcMRN means an identifier that can identify the shipping station 300 that has transmitted the message. The srcMRN and the coast station identification information are generated as one piece of information by the information generating unit 122 and stored in the storage unit 123 . At this time, if information on the same srcMRN already exists in the routing table, the coast station identification information for srcMRN is updated. Here, the difference between the device identification information of the existing coast station 200 and the newly received identification information means that the shipping station 300 is connected to the new coast station 200 .

5 is a configuration example of matching information stored in the storage unit 123 . Whenever a request message is received from the ship station 300, the information generator 122 extracts srcMRN from the request message, and adds new matching information to this table using the identification information of the VDES transceiver of the coast station that received the data. Add or update existing matching information.

That is, when the coast station gateway 120 is driven to receive the HTTP message transmitted by the ship station 300 through the coast station VDES transceiver device, the coast station gateway interprets the srcMRN information written in the header of the HTTP message, and the coast station Matching information is generated together with identification information of the station VDES transceiver. At this time, the storage unit 123 checks whether existing matching information for srcMRN exists, and if there is no information on srcMRN, stores new matching information in the routing table, and if there is already matching information, the existing matching information is replaced with new matching information. It is updated with matching information. When the processing of such matching information is completed, the coast station gateway 120 waits until the next request message is received.

When the service host 110 transmits a message to the shipping station 300 , a response message is transmitted in response to the polling request of the shipping station 300 . The HTTP response message transmitted by the service host 110 is received as in the example of FIG. 6 . When the service host 110 transmits the HTTP response message to the coast station gateway 120 , the response message receiving unit 125 of the coast station gateway 120 receives and interprets the response message. The response message includes dstMRN, which means identification information of a ship station that should receive the response message.

The information processing unit 126 extracts an identification number, for example, an IP address, of a VDES transceiver of a coast station to which a response message is to be transmitted from a routing table using dstMRN. Referring to the matching information shown in FIG. 5 , it can be seen that the coast station VDES transceiver identification number for dstMRN urn:mrn:itu:mmsi:440000100 is 192.168.30.10. At this time, the response message sending unit 127 of the coast station gateway 120 uses the TCP/IP or UDP method as the coast station VDES transceiver IP address extracted by the information processing unit 126 from the response message interpreted by the response message sending unit 127 . send.

7 is a diagram schematically illustrating a maritime wireless communication method according to an embodiment of the present invention.

Referring to FIG. 7 , the maritime wireless communication method according to an embodiment of the present invention is a maritime wireless communication method for the service center 100 to transmit and receive messages to and from a ship station 300 , via the coast station 200 . From the request message received from the shipping station 300, coast station identification information for identifying the coast station 200 and shipping station identification information for identifying the shipping station 300 are extracted, and the generated response message is extracted. It is transmitted to the shipping station 300 via the coast station 200 according to the coast station identification information and the shipping station identification information.

That is, the maritime wireless communication method according to an embodiment of the present invention is a maritime wireless communication method for the service center 100 to transmit and receive messages to and from the ship station 300 , and the ship station 300 via the coast station 200 . ) receiving a request message from the request message (S100), and extracting coast station identification information for identifying the coast station 200 and shipping station identification information for identifying the ship station 300 from the request message (S200) ) and transmitting the generated response message to the coast station 200 according to the extracted coast station identification information and the ship station identification information (S400).

In the process of receiving the request message ( S100 ), the service center 100 receives the request message generated by the shipping station 300 and transmitted via the coast station 200 . Here, the shipping station 300 periodically polls to check whether there is a message to be received from the service center 100 . Polling is performed by generating a message from the ship station 300 . That is, the message transmitted from the ship station 300 is transmitted to the coast station 200 according to HTTP (Hypertext Transfer Protocol), and the message transmission from the ship station 300 to the coast station 200 is VDES (VHF Data Exchange). System) is done using the communication network. At this time, the coast station 200 receives the message from the shipping station 300 and transmits it to the service center 100 , and the message transmission from the coast station 200 to the service center 100 is TCP/ It is done according to IP.

In the process of extracting the coast station identification information and the shipping station identification information ( S200 ), coast station identification information for identifying the coast station 200 and shipping station identification information for identifying the shipping station 300 are obtained from the request message. extract Here, the process of extracting the coast station identification information and the ship station identification information ( S200 ) is performed by the coast station gateway 120 included in the service center 100 .

The coast station gateway 120 interprets the message received from the shipping station 300 to generate an HTTP request message. The generated request message is transmitted to the service center 100 and is obtained as maritime data information. Also, when receiving the request message from the shipping station 300 , the coast station gateway 120 configures a routing table using the shipping station identification information. When transmitting a message to the shipping station 300 , the coast station gateway 120 determines through which route the message should be transmitted to the shipping station 300 by referring to a routing table.

Here, in the process of extracting the coast station identification information and the ship station identification information ( S200 ), the coast station 200 that has transmitted the request message is identified to extract the coast station identification information, and the header of the HTTP message is checked to determine the shipping station. Identification information can be extracted. In this case, the coast station identification information may include Internet Protocol (IP) address information of the coast station, and the shipping station identification information may include Maritime Resource Name (MRN) information of the shipping station.

That is, when transmitting a message according to the HTTP protocol, in the header of the HTTP message, the unique identifier of the shipping station 300 that sent the message is specified in the srcMRN field and transmitted, and the target service or the unique identifier of the target shipping station 300 is transmitted. It is transmitted by designating it in the dstMRN field. In this case, the information generator 122 generates the coast station identification information and the ship station identification information from the request message received from the receiver.

The request message received through the request message receiving unit 121 includes srcMRN and dstMRN included in the HTTP message generated by the shipping station 300, where srcMRN can identify the shipping station 300 that has transmitted the message. means an identifier. The srcMRN and the coast station identification information are generated as one piece of information by the information generating unit 122 and stored in the storage unit 123 . At this time, if information on the same srcMRN already exists in the routing table, the coast station identification information for srcMRN is updated. Here, the difference between the device identification information of the existing coast station 200 and the newly received identification information means that the shipping station 300 is connected to the new coast station 200 . Here, whenever a request message is received from the shipping station 300 , the information generator 122 extracts srcMRN from the request message, and uses the identification information of the VDES transceiver of the coast station that received the data to match the new table. Add information or update existing matching information.

The information processing unit 126 extracts an identification number, for example, an IP address, of a VDES transceiver of a coast station to which a response message is to be transmitted from a routing table using dstMRN. Referring to the matching information shown in FIG. 5 , it can be seen that the coast station VDES transceiver identification number for dstMRN urn:mrn:itu:mmsi:440000100 is 192.168.30.10. At this time, the response message sending unit 127 of the coast station gateway 120 uses the TCP/IP or UDP method as the coast station VDES transceiver IP address extracted by the information processing unit 126 from the response message interpreted by the response message sending unit 127 . send.

The maritime wireless communication method according to an embodiment of the present invention may further include a step of storing the extracted coast station identification information and ship station identification information (S300). Here, the process of storing the coast station identification information and the ship station identification information (S300) may be performed after the process of extracting the coast station identification information and the ship station identification information (S200).

Meanwhile, the process of storing the coast station identification information and the ship station identification information ( S300 ) includes a process of generating matching information by matching the coast station identification information and the ship station identification information with each other, and a process of storing the generated matching information. may include That is, the process of storing the coast station identification information and the ship station identification information ( S300 ) is performed by the coast station gateway 120 , and the request message receiving unit 121 of the coast station gateway 120 receives the coast station 200 . The message sent by the ship station 300 is recovered by analyzing the data received through the This message includes srcMRN and dstMRN included in the HTTP message generated by the shipping station 300, where srcMRN means an identifier that can identify the shipping station 300 that has transmitted the message. The srcMRN and IP address information of the coast station 200 are each matched as one piece of information in the information generating unit 122 and stored in the storage unit 123 . At this time, if information on the same srcMRN already exists in the routing table, the coast station identification information for srcMRN is updated. Here, the difference between the device identification information of the existing coast station 200 and the newly received identification information means that the shipping station 300 is connected to the new coast station 200 .

In this case, the process of storing the coast station identification information and the ship station identification information (S300) includes the process of checking whether the generated matching information is different from the previously stored matching information (S310) and if the generated matching information is different from the previously stored matching information, previously It may include a process (S330) of updating the stored matching information. Here, if the generated matching information is the same as the previously stored matching information or if there is no matching information stored in advance in the storage unit 123 , the process ( S320 ) of storing the generated matching information in the storage unit 123 is performed as well as am.

That is, when the coast station gateway 120 is driven to receive the HTTP message transmitted by the ship station 300 through the coast station VDES transceiver device, the coast station gateway interprets the srcMRN information written in the header of the HTTP message, and the coast station Matching information is generated together with identification information of the station VDES transceiver. At this time, the storage unit 123 checks whether the existing matching information for srcMRN exists, and if there is no information on srcMRN, stores new matching information in the routing table, and if there is already matching information, the existing matching information is replaced with new matching information. It is updated with matching information. When the processing of such matching information is completed, the coast station gateway 120 waits until the next request message is received.

In the process of transmitting the response message ( S400 ), a response message is generated, and the generated response message is transmitted to the coast station according to the extracted coast station identification information and the ship station identification information. Here, in the step of transmitting the response message ( S400 ), the process of generating a response message including the shipping station identification information and the generated response message are transmitted to the coast station 200 according to the coast station identification information matched with the shipping station identification information. ) may include the process of transmitting to

When the service host 110 transmits a message to the shipping station 300 , a response message is transmitted in response to the polling request of the shipping station 300 . The HTTP response message transmitted by the service host 110 is received as in the example of FIG. 6 . When the service host 110 transmits the HTTP response message to the coast station gateway 120 , the response message receiving unit 125 of the coast station gateway 120 receives and interprets the response message. The response message includes dstMRN, which means identification information of a ship station that should receive the response message.

The information processing unit 126 extracts an identification number, for example, an IP address, of a VDES transceiver of a coast station to which a response message is to be transmitted from a routing table using dstMRN. Referring to the matching information shown in FIG. 5 , it can be seen that the coast station VDES transceiver identification number for dstMRN urn:mrn:itu:mmsi:440000100 is 192.168.30.10. At this time, the response message sending unit 127 of the coast station gateway 120 uses the TCP/IP or UDP method as the coast station VDES transceiver IP address extracted by the information processing unit 126 from the response message interpreted by the response message sending unit 127 . send.

As described above, according to the maritime wireless communication system and method according to an embodiment of the present invention, a message can be effectively transmitted and received between the service center 100 and the shipping station 300 through the established wireless communication link.

In addition, even when a plurality of coast stations 200 communicate with a plurality of ship stations 300 , messages can be transmitted and received through a set wireless communication link, and the coast stations 200 connected by movement of the ship stations 300 . ) is changed, communication between the service center 100 and the ship station 300 can be maintained without loss of the message.

In the above, preferred embodiments of the present invention have been described and illustrated using specific terms, but such terms are only for clearly explaining the present invention, and the embodiments of the present invention and the described terms are the spirit of the following claims And it is obvious that various changes and changes can be made without departing from the scope. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, but should be said to fall within the scope of the claims of the present invention.

100: service center 110: service host
120: coast station gateway 121: request message receiving unit
122: information generating unit 123: storage unit
124: request message transmitter 125: response message receiver
126: information processing unit 127: response message transmitter
200: coast station 300: shipping station

Claims (15)

A maritime wireless communication system for transmitting and receiving messages between a service center and a ship station, comprising:
The ship station transmits a request message to the service center via the coast station,
The service center generates a response message including shipping station identification information for identifying the shipping station, and transmits the generated response message to the ship via the coast station according to the coast station identification information for identifying the coast station. send to the country,
The service center is
a service host for generating a response message to the request message received from the ship station; and
a coast station gateway configured to receive a response message from the service host and transmit the response message to the coast station;
The coast station gateway,
a request message receiving unit for receiving a request message from the coast station;
an information generating unit for generating the coast station identification information and the ship station identification information from the request message received from the request message receiving unit;
a storage unit for storing matching information in which the coast station identification information and the ship station identification information are matched with each other;
a request message transmitting unit for transmitting a request message via the information generating unit to the service host;
a response message receiving unit for receiving a response message from the service host;
an information processing unit for extracting the coast station identification information according to the ship station identification information from the information generation unit; and
a response message transmitter configured to transmit the response message to the coast station according to the coast station identification information and the ship station identification information;
The storage unit,
If the coast station identification information and the shipping station identification information input from the information generator are different from the previously stored matching information, update the matching information stored in advance according to the coast station identification information and the ship station identification information input from the information generator; ,
The response message sending unit,
The maritime wireless communication system receives the updated matching information from the storage unit and transmits the response message to the coast station according to the updated matching information. a shipping station for generating a request message to be sent to the service center;
a coast station for receiving a request message from the ship station and transmitting it to the service center; and
Receives a request message from the coast station, generates a response message including shipping station identification information for identifying the shipping station, and transmits the generated response message to the coast station according to the coast station identification information for identifying the coast station Including; service center for transmitting to the ship station via the station;
The service center is
a service host for generating a response message to the request message received from the ship station; and
a coast station gateway configured to receive a response message from the service host and transmit the response message to the coast station;
The coast station gateway,
a request message receiving unit for receiving a request message from the coast station;
an information generating unit for generating the coast station identification information and the ship station identification information from the request message received from the request message receiving unit;
a storage unit for storing matching information in which the coast station identification information and the ship station identification information are matched with each other;
a request message transmitting unit for transmitting a request message via the information generating unit to the service host;
a response message receiving unit for receiving a response message from the service host;
an information processing unit for extracting the coast station identification information according to the ship station identification information from the information generation unit; and
a response message transmitter configured to transmit the response message to the coast station according to the coast station identification information and the ship station identification information;
The storage unit,
If the coast station identification information and the shipping station identification information input from the information generator are different from the previously stored matching information, update the matching information stored in advance according to the coast station identification information and the ship station identification information input from the information generator; ,
The response message sending unit,
The maritime wireless communication system receives the updated matching information from the storage unit and transmits the response message to the coast station according to the updated matching information. The method according to claim 1 or 2,
The maritime wireless communication system wherein the coast station identification information and the ship station identification information are extracted from a request message transmitted to the service center. The method according to claim 1 or 2,
The coast station is provided in plurality to communicate with the service center, respectively,
A maritime wireless communication system in which at least one of the ship stations is provided in plurality to communicate with each coast station. delete delete delete delete delete As a maritime wireless communication method for a service center to transmit and receive messages with a ship station,
receiving a request message from the ship station via a coast station;
extracting coast station identification information for identifying the coast station and shipping station identification information for identifying the ship station from the request message;
storing the extracted coast station identification information and ship station identification information; and
Transmitting the generated response message to the coast station according to the stored coast station identification information and the ship station identification information;
The process of storing the coast station identification information and the ship station identification information includes:
generating matching information by matching the coast station identification information with the ship station identification information; and
If the generated matching information is different from the previously stored matching information, updating the previously stored matching information according to the extracted coast station identification information and ship station identification information;
The process of transmitting to the coast station is
generating a response message including the ship station identification information; and
and transmitting the response message to the coast station according to the updated matching information. 11. The method of claim 10,
The request message includes a Hypertext Transfer Protocol (HTTP) message,
The process of extracting the coast station identification information and the ship station identification information includes:
A maritime wireless communication method for extracting coast station identification information by identifying a coast station that has transmitted the request message, and extracting ship station identification information by checking a header of the HTTP message. 12. The method of claim 11,
The coast station identification information includes Internet Protocol (IP) address information of the coast station,
The shipping station identification information includes Maritime Resource Name (MRN) information of the shipping station. delete delete delete

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