KR102051382B1 - Vdes system able to communication of long distance, using a repeater to ship station - Google Patents

Abstract

The present invention relates to a VDES communication system capable of long-distance communication using a ship station as a relay.
Specifically, when the coast station and the ship station intends to communicate to a destination located far away in the VDES communication, by having a nearby coast station acts as a relay,
The high output power for the conventional long distance communication overcomes the problems caused by the interference between signals, and it is possible to achieve the purpose of miniaturization of hardware as the coverage is possible with the same output as the low power and short range output. The present invention relates to a VDES communication system capable of long-distance communication using a ship station as a relay.

Description

VDES communication system capable of long-distance communication using ship station as a relay {VDES SYSTEM ABLE TO COMMUNICATION OF LONG DISTANCE, USING A REPEATER TO SHIP STATION}

The present invention relates to a VDES communication system capable of long-distance communication using a ship station as a relay.

Specifically, if the coast station and the ship station intends to communicate to a far-distant destination during VDES communication, the neighboring coast station acts as a relay through VDES slot allocation.

In order to achieve the purpose of miniaturization of hardware, it is possible to overcome the problems caused by the interference between signals due to the high output for the long distance communication and to cover the same output as the output for the low power and the short distance. The present invention relates to a VDES communication system capable of long-distance communication using a ship station as a relay.

The conventional AIS (Automatic Vessel Identification System) for maritime communication selects one of two channels designated with 25 KHz bandwidth and transmits 256 bits of data at a fixed transmission rate of 96 Kbps. In this case, the AIS is configured to transmit by using one slot resource divided into 2,250 26667 ms with one minute as one frame.

Exceptions include low priority application messages such as 6 (Addressed binary message), 8 (Binary broadcast message), and 26 (Mult slot binary message with Communications State). For messages 8 and 26, the fourth priority requires more than one slot. The AIS is designed to transmit data using up to five consecutive slots (see ITU-R M1371-5 32211).

However, this priority applies to both the received message and the message to be transmitted, but is limited to the transport layer that is sent to and received from the presentation interface (PI).

The priority of messages sent by other ships does not affect the application of own ship's messages. Therefore, when the usage of these application messages increases, priority such as message 1 (Position report-Scheduled position report), message 2 (Position report-Assigned scheduled position report), and message 3 (Position report-Special position report) Insufficient slot resources are available for use by higher priority messages (priorities 1, 2 and 3 have a priority of 1).

Therefore, communication traffic overload problem may occur. In addition, when there are not enough slot resources available, the possibility of slot collision may occur frequently according to an access scheme. By repeatedly occupying multiple slots through slot allocation retry, a data transmission delay of essential messages may occur.

In order to solve this problem, a technique for managing a transmission / reception slot on a marine communication is disclosed, and a transmission / reception slot management apparatus and method for maritime communication in Korean Patent Publication No. 10-2019-0068307, and a marine microwave data exchange system is disclosed. have.

The transmission and reception slot management method according to the above technique is a transmission / reception slot management method performed by a transmission / reception slot management apparatus of a marine microwave data exchange system, the vessel station or base station that is different from the slot map for transmitting and receiving data through a single antenna for transmission and reception. Allocating a reception slot according to the slot reservation information received from the network; arranging transmission data to be transmitted to another ship station or base station according to a predetermined priority; and in the slot map, the alignment according to a predetermined priority. The method includes allocating the transmitted data in order.

On the other hand, the applicant has devised a way to transmit a message to a ship station located far through the low power and output by allocating a slot as described above.

On the other hand, Korean Patent Laid-Open No. 10-2006-0018747 describes a marine relay system for mobile communication.

The above-mentioned technology relates to a marine relay system for mobile communication, and installs a marine dedicated base station that relays 1FA for smooth use of mobile communication even in a long distance, and installs a marine repeater as a carrier copy type wave repeater. By receiving and relaying the signals transmitted from the base stations, not only the smooth handoff is performed with the coastal base stations supporting the coast, but also the installation cost of the dedicated base station for maritime services is reduced, the frequency utilization and the efficiency of the base stations are increased. It is described that there is an advantage that can be made.

However, the above technique is different from the applicant's technique in that a dedicated base station for relaying is provided.

In addition, Korean Patent Publication No. 10-1709685 describes a mobile communication relay service system and method for a vessel.

The above technology relates to a mobile communication relay service system and method for a ship, and more particularly, a mobile communication relay for a ship that provides a smooth mobile communication service to a ship in the ocean by setting a moving ship as a wireless base station relay node. A service system and method.

According to the present invention, among the plurality of relay ships moving along the sea and relaying signals through the communication with the base station located on the land, the vessels located in the ocean rather than the service area of the mobile communication system have the best signal and can be used for a long time. By using a relay ship as a radio base station relay node, it is possible to support the relaying of mobile communication service for a vessel requesting mobile communication service, thereby providing a high quality mobile communication service for a ship located in the ocean. At the same time, it is described that the mobile communication service area can be expanded to the sea.

Further, Japanese Patent Laid-Open No. 10-0791122 describes a mobile communication relay apparatus for mounting a moving object.

The above technique is a mobile communication relay for mounting a mobile device, comprising: a first duplexer portion for separating a forward signal and a reverse signal, a second duplexer portion for separating a forward signal and a reverse signal, and an input from the first duplexer portion A downlink relay processing unit including a downlink relay unit for relaying a forward signal to the second duplexer unit and distributing a path of the forward signal to be relayed and outputting the distributed forward signal to a down converter unit; A coupling unit for relaying the reverse signal input from the second duplexer unit and outputting the reverse signal to the first duplexer unit, and coupling a path of the corresponding reverse signal input from the up converter unit to a path of the reverse signal to be relayed; A link relay processor and a forward signal output from the distribution unit to a baseband The down converter converts the down-converted signal to the mobile communication processor, up-converts the baseband reverse signal output from the mobile communication processor, and outputs the up-converter to the combiner, and receives a forward baseband signal. The mobile communication receiving process, the mobile communication transmission process for outputting the baseband reverse signal by the mobile communication transmission process for the reverse signal, and controls the communication connection between a predetermined external server, and receives the operation information from the external server It is displayed through the display unit, characterized in that it comprises a control unit for transmitting the navigation information of the moving object itself to the corresponding external server.

However, the above-described techniques are not optimized for VDES communication and, in addition, do not consider any interference in acting as a relay.

Publication No. 10-2019-0068307 (2019.06.18.) Published Patent Publication No. 10-2006-0018747 (2006.03.02.) Patent Application Publication No. 10-1709685 (August 24, 2017.) Patent Registration No. 10-0791122 (January 2, 2008)

An object of the present invention, if the coast station and the ship station to communicate to a destination that is located far away in the VDES communication, by having a nearby coast station to act as a relay,

In order to achieve the purpose of miniaturization of hardware, it is possible to overcome the problems caused by the interference between signals due to the high output for the long distance communication and to cover the same output as the output for the low power and the short distance. The present invention provides a VDES communication system capable of long-distance communication using a ship station as a relay.

In order to achieve the above object, the VDES communication system capable of long-distance communication using the ship station according to the present invention as a relay,

For communication between the coast station and the ship station, each of the coast station and the ship station is provided with a VDES server,

When the VDES server intends to communicate a distance exceeding a communication range, the VDES server functions to communicate with another ship station located in the communication range as a relay station.

At this time, the VDES server,

A transmission message generator for generating a transmission message to be transmitted to a destination;

A message transmitter for transmitting a message generated by the transmission message generator;

A message receiver for receiving a message transmitted from the message transmitter; And

A relay message determining unit determining whether the message received by the message receiving unit includes relay information;

The message transmission unit,

If it is determined that the message received by the message receiving unit includes relay information by the relay message determining unit, it is characterized by releasing and transmitting the corresponding message.

In addition, the transmission message generating unit,

And a destination information generation module for generating destination information based on a manager's input when the destination is determined, and a relay information generation module for generating relay information when a station to be relayed exists.

According to the VDES communication system capable of long-distance communication using the ship station according to the present invention,

If the coast station and the ship station want to communicate to a far-distant destination during VDES communication, the ship station near the coast station should act as a relay,

In order to achieve the purpose of miniaturization of hardware, it is possible to overcome the problems caused by the interference between signals due to the high output for the long distance communication and to cover the same output as the output for the low power and the short distance. Has the effect.

1 is a diagram illustrating a VDES communication system capable of long-distance communication using a ship station as a repeater according to the present invention.
2 is a block diagram illustrating a VDES communication system capable of long-distance communication using a ship station as a repeater according to the present invention.
3 is a schematic view illustrating the present invention.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. Based on the principle, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, and various equivalents may be substituted for them at the time of the present application. It should be understood that there may be variations and examples.

Before describing the present invention with reference to the drawings, it is not shown or specifically described for the matters that are not necessary to reveal the gist of the present invention, that is, those skilled in the art can obviously add. Make a note.

The present invention relates to a VDES communication system capable of long-distance communication using a ship station as a relay.

Specifically, when the coast station and the ship station intends to communicate to a destination where the distance is far from the VDES communication, by having a nearby coast station acts as a relay,

In order to achieve the purpose of miniaturization of hardware, it is possible to overcome the problems caused by the interference between signals due to the high output for the long distance communication and to cover the same output as the output for the low power and the short distance. The present invention relates to a VDES communication system capable of long-distance communication using a ship station as a relay.

As an example, it will be described with reference to FIG. 1 of the accompanying drawings.

1 is a view for explaining a VDES communication system capable of long-distance communication using the ship station as a repeater according to the present invention.

As shown in FIG. 1 of the accompanying drawings, in the case of the communication between the coast station and the ship station performing the VDES communication, when performing communication with the ship station # 2, by using the VDES server of the ship station # 1 as a repeater, The output and power according to the distance to communicate with station # 1 can enable communication with ship station # 2 located further away.

Before describing such a VDES server, VDES will be described.

VDES-based coast station communication system provides G1139 ASM / VDE message transmission and reception, data transmission / reception function for broadcasting, unicast, multicast, and geocast message transmission, and remote control / monitoring function of remote control via Ethernet. For this purpose, it includes a VDES coast station transceiver, auxiliary equipment and a VDES coast station controller.

The VDES coast station transceiver can be installed and operated directly in the AIS coast station transmitter station which is developed and operated in the 19-inch standard subrack type. The VDES coast station transceiver is equipped with two VHF antennas to provide full-duplex VDE service, and it is possible to operate both VDE and ASM simultaneously by securing isolation when installing antennas.

Such a VDES coast station transceiver is designed to operate by dividing the VDES operating frequency bands.

Ancillary equipment includes a VHF antenna, a shear processor, a GPS antenna and cables.

In this case, description of the GSP antenna and cables will be omitted.

VHF antenna is applied to VDES coast station and provides air interface link between communication equipments. When transmitting, it converts electrical signals of equipments into electromagnetic signals to propagate in free space, and when receiving, it processes electromagnetic signals of free space in equipment. It is a device that converts into possible electrical signals.

The VHF antenna is composed of a radiating part, a matching part and a base, and has a length of 5.5m or less including a bay. The VHF antenna transmits and receives electromagnetic signals in the 156 to 162 MHz band, and has a transmission characteristic of 50 Ω and 3.5: 1 or less.

The front end processor is installed between the transceiver and the antenna to prevent VDE transmission ASM transmission and reception, and interference between channels at the front end of the VDE receiver in a full duplexer method.

The front end processor consists of the VDE transmitter cavity filter, the ASM transmitter / receiver cavity filter, the VDE receiver cavity filter, and the duplexer that distinguishes ASM reception from VDE reception.

The VDES coast station controller installs and operates a VDES coast station control S / W on a terminal (a PC such as a laptop or a desktop), and performs the function of controlling / monitoring the VDES coast station transceiver through Ethernet.

In the present invention, the above-described VDES coast station transceiver, the auxiliary equipment, and the VDES coast station control device are understood as a VDES server, or a structure for the operation of the VDES server or a structure that is interlocked with those skilled in the art.

However, since the main technical matters of the present invention are to communicate with the ship station located in the vicinity of the ship station farther away from the coast station with respect to the ship station in the vicinity as described above, the VDES server Only the components that function for this purpose will be described and described.

Hereinafter, the VDES server will be described with reference to FIG. 2 in the accompanying drawings.

2 is a block diagram illustrating a VDES communication system capable of long-distance communication using a ship station as a repeater according to the present invention.

According to FIG. 2 of the accompanying drawings, the VDES server includes a transmission message generation unit; A message transmitter; Message receiving unit; Relay message decision unit; And a frequency emitting unit.

Such a VDES server is installed in each of the coast station and the ship station, it can be installed in the SW type terminal (control device) provided in each of them or function in conjunction with.

The transmission message generating unit functions to generate a transmission message to be transmitted to the destination. In this case, the message generation may be generated based on the input of the administrator, or may be automatically combined based on the predetermined rule and the input of the administrator. Since such message generation is obvious to a person skilled in the art, a detailed description thereof will be omitted.

In addition, the destination means a final station that receives the message when the message is transmitted, such as a shelf station at the coast station, a ship station at the ship station, or a coast station at the ship station.

The transmission message generation unit includes a destination information generation module for generating destination information based on a manager's input when a destination is determined, and a relay information generation module for generating relay information when a station to be relayed exists.

The relay information is information on a message rule indicating that a relay station exists when transmitting a message from the coast station to ship station # 2, for example. For example, the ship station # 1 may be information including the relay station.

Alternatively, the relay account may be information for which no relay station is designated. However, the information may mean that the relay station exists. In this case, the VDES server of the ship station receiving the message may determine the existence of the relay information and transmit the message to another ship station within the communication range again if the destination is not itself.

The message transmission unit functions to transmit a message generated by the transmission message generation unit.

Such a message transmission unit may transmit a message to a corresponding ship station if the relay station is correctly determined in the relay information. If the relay station is relay information, the relay station is a message directed to a specific destination. The message may be sent in the form of a release to a nearby ship station within its communicable range.

The message receiving unit functions to receive a message transmitted from the message transmitting unit. Also, the message receiver determines whether the received message is intended for the station.

The relay message determination unit determines whether the message received by the message receiver includes relay information.

In this case, when the relay message determining unit determines that the relay message has the relay information, if the destination is not the corresponding station due to the determination result of the message receiving unit, the message may be transmitted again through the message transmitting unit.

On the other hand, as described above, when the relay station is not set correctly in the relay information, as the message transmission in the form of emission is made, it may cause confusion between ship stations, and the destination station may receive a duplicate message .

In this case, although the duplicated message of the destination is not shown in the drawing, the redundant message removing unit may further include a duplicate message removing unit of the VDES server of the receiving station corresponding to the destination information included in the message to remove the duplicate message. .

In the case of confusion of the ship station, for example, reference is made to FIG. 3.

3 is a schematic view illustrating the present invention.

Referring to FIG. 3 of the accompanying drawings, for example, when the destination is ship station # 5 (line 5), and the relay station is not correctly set in the relay information when the message is transmitted from the coast station, the coast station first The message sent from is transmitted to ship station # 1 and ship station # 2 within the communication range.

When the ship station # 1 and the ship station # 2 confirms that the destination of the received message is not itself, the ship station transmits the corresponding message again, and the message is transmitted from the ship station # 2 to the ship station # 4 within a communication range. Ship station # 4 likewise retransmits the message. However, if there is no other ship station within the communication range, the message may be destroyed, but since the ship station # 2 is within the communication range with the ship station # 4, the message may be retransmitted to the ship station # 2, which is a message. Errors can occur due to overload of transmissions and interference between frequencies.

The same applies to the case where it is transmitted to the ship station # 1 and transmitted to the ship station # 3 and the ship station # 6, and the same also when the message received by the ship station # 6 is transmitted again to the ship station # 5.

In order to overcome this problem, the present invention includes a frequency emitter as a method of not receiving a message again at a ship station that has already passed a message according to a design condition.

The frequency emitter functions to emit a frequency used for communication in a ship station equipped with a corresponding VDES server for a predetermined time. At this time, the frequency emitted through the frequency emitter does not include any information, and emits for about 1 to 5 minutes.

Through this, even if the message transmitted from the ship station # 4 in the above-described example is transmitted back to the ship station # 2, it is possible to block the reception of the message by the frequency emitted by the ship station # 2.

The frequency emitter may be controlled to operate when the message received from the specific station is transmitted through the message transmitter.

In addition, what was described above using the drawing has described only the main matter of this invention, and it is clear that this invention is not limited to the structure of drawing as long as various designs are possible within the technical scope.

Claims (3)

In the VDES communication system for communication between the coast station and the ship station,
Each of the coast station and the ship station is provided with a VDES server,
When communicating the distance beyond the communication range, the VDES server functioning to communicate with another ship station located in the communication range as a relay station,
A transmission message generator for generating a transmission message to be transmitted to a destination;
A message transmitter for transmitting a message generated by the transmission message generator;
A message receiver for receiving a message transmitted from the message transmitter;
A relay message determining unit determining whether the message received by the message receiving unit includes relay information; And
In order to avoid receiving the message again in the ship station has already passed the message, the frequency emission unit for emitting a frequency for a predetermined time that the message is used for communication in the ship station of the route; includes,
The message transmission unit,
If it is determined that the message received by the message receiver includes relay information by the relay message determining unit, the message is emitted and transmitted.
The transmission message generating unit,
A destination information generation module for generating destination information based on a manager's input when a destination is determined;
And a relay information generation module for generating relay information when there is a station to be relayed, wherein the long distance communication is possible using the ship station as a relay. delete delete

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