KR20100096697A - Ship communication apparatus and the method thereof - Google Patents

Ship communication apparatus and the method thereof Download PDF

Info

Publication number
KR20100096697A
KR20100096697A KR1020090015709A KR20090015709A KR20100096697A KR 20100096697 A KR20100096697 A KR 20100096697A KR 1020090015709 A KR1020090015709 A KR 1020090015709A KR 20090015709 A KR20090015709 A KR 20090015709A KR 20100096697 A KR20100096697 A KR 20100096697A
Authority
KR
South Korea
Prior art keywords
communication network
communication
lan
signal
power line
Prior art date
Application number
KR1020090015709A
Other languages
Korean (ko)
Inventor
강경호
성환웅
신민수
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to KR1020090015709A priority Critical patent/KR20100096697A/en
Publication of KR20100096697A publication Critical patent/KR20100096697A/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/58—Repeater circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE: A communication system relay device in a ship and a relay method of the same are provided to use a LAN communication network as a basic communication network and comprise a power line communication network as backup network, thereby embodying smooth and continuous communication through the power communication network if the basic communication network is not usable. CONSTITUTION: A LAN(Local Area Network) network signal transceiver(310) transceives a communication signal with a communication device through a LAN cable. A power line network transceiver(320) transceives the communication signal with the LAN communication device through a power line. A determination unit(340) determines abnormality of a LAN communication network. If the determination unit notifies abnormal state of the LAN communication network, a network switching unit switches the LAN communication network for transceiving the communication signal by the power line.

Description

Communication system repeater in ships and its relay method {Ship Communication Apparatus and the method

TECHNICAL FIELD The present invention relates to a communication system, and more particularly, to a communication system relay apparatus and a relay method thereof in a ship.

In modern society, ships are used for various purposes such as travel, cargo transportation and national defense, and accordingly, ships can be classified into passenger ships, cargo ships and warships.

Ships are divided into cabins such as cabins and engine rooms, and are generally operated using various mechanical devices such as main engines, auxiliary engines, propulsion shafts, propellers, propellers, engines, motor gears, and electrical and electronic devices. Control is required.

However, ships are being enlarged and speeded up according to their needs, and the operation of various electric, electronic and mechanical devices of the ship is not only automated, but also in the case of passenger ships, cargo ships, etc., advanced ships should include various multimedia equipments. In addition, in order to increase the size and speed of the ship, the ship's light weight is being promoted simultaneously.

In other words, the communication network in the ship is progressing in capacity, speed, and stabilization for the larger, faster and more automated vessel. Communication networks applied to ships are not only control signals for remote control and monitoring of electrical equipment and distribution system equipment, but also various kinds of data or multimedia contents such as broadcasting equipment, TVs, systems, telephones, CCTVs, PC networks, etc. It must be able to transmit and receive information stably. The communication network applied in ships is expanding the application of the digital communication network based on the LAN, and the communication network is designed to have a backup communication network structure by multiplexing the LAN communication network to secure its stability.

1 is a conceptual diagram showing the structure of a LAN communication system in a ship according to the prior art.

Referring to FIG. 1, a LAN communication system in a ship according to the prior art includes a LAN communication device 110 and 120, a communication network relay device 130, and a main LAN cable 140 and 160. And additional auxiliary LAN cables 150 and 170. Each device is connected to a power line 180 for supplying driving power.

The first LAN communication device 110 communicates with the second LAN communication device 120 via the communication network relay device 130. In this case, the first LAN communication device 110 primarily transmits a communication signal to the communication network relay device 130 through the first main LAN cable 140. The communication network relay device 130 transmits the communication signal received from the first main LAN communication device 110 to the second LAN communication device 120 through the second main LAN cable 160.

However, if there is an error in the transmission of the communication signal through the second primary LAN cable 160, the communication network relay device 130 signals to the second LAN communication device 120 through the second auxiliary LAN cable 170, which is a backup network. Send.

As described above, the LAN communication system in a ship according to the prior art further includes a backup network in order to maintain transmission and reception of communication signals stably. That is, when there is an error in the transmission and reception of the communication signal through the primary LAN cable, the transmission and reception of the communication signal through the auxiliary LAN cable. Since such a conventional LAN communication system requires a plurality of auxiliary LAN cables separately in a ship, the system becomes complicated, the installation cost of the cable increases, and the weight of the system increases.

As the communication system implemented in a ship becomes complicated and the weight of the communication system increases, there is also a problem that makes it difficult to increase the size and speed of the ship. Therefore, it is very important to implement a communication system on a ship more simply and thereby reduce the weight of the communication system.

An object of the present invention is to solve such a conventional problem, by using a LAN communication network as a basic communication network, by configuring a power line communication network as a backup network, when it is difficult to use the basic communication network, continuous smooth communication using the power line communication network The present invention provides a communication network relay apparatus and a relay method thereof.

Another object of the present invention is to provide a communication network relay apparatus and a method for relaying the same, in which it is difficult to continuously use a power line communication network as a basic communication network, by using a LAN communication network.

It is still another object of the present invention to provide a communication network relay apparatus and a method of relaying the power line communication network as a backup network, which is simpler in construction and reduced in weight.

In accordance with an aspect of the present invention to solve the technical problem as described above, a communication network relay device and a mediation method is disclosed.

Communication network relay apparatus in a ship according to an embodiment of the present invention includes a LAN communication network signal transmission and reception unit for transmitting and receiving a communication signal with the LAN communication device via a LAN cable; A power line communication network transceiver for transmitting and receiving the communication signal with the LAN communication apparatus through a power line; A determination unit that determines whether the LAN communication network is abnormal; And a communication network switching unit for switching the communication network so that the communication signal is transmitted and received by the power line when notified that the LAN communication network is abnormal from the determination unit.

A communication network relay method according to an embodiment of the present invention includes the steps of (a) determining whether any one or more of the LAN communication network or the power line communication network is abnormal; (b) switching the LAN communication network to the power line communication network when determining that the LAN communication network is abnormal, or switching the power line communication network to the LAN communication network when determining that the LAN communication network is abnormal; And (c) transmitting and receiving a communication signal through a communication network switched in the step (b).

As described above, according to the present invention, the LAN communication network is used as a basic communication network, but the power line communication network is configured as a backup network, so that when the use of the basic communication network is difficult, the smooth communication can be continuously performed using the power line communication network. do.

In addition, according to the present invention, when it is difficult to use a power line communication network as a basic communication network, it is possible to continuously perform a smooth communication using a LAN communication network.

In addition, by configuring the power line communication network as a backup network, it is possible to provide a communication network relay device with a simpler configuration and reduced weight, so that when the communication network relay device according to the present invention is mounted on a ship, the total weight of the ship is reduced. As a result, the vessel can be enlarged, speeded up, and automated.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Regardless of the reference numerals, the same or corresponding components will be given the same reference numerals and redundant description thereof will be omitted.

In the following description, a process in which a communication signal is transmitted from the first LAN communication device to the second LAN communication device will be described. However, the direction described below, such as the communication signal being transmitted from the second LAN communication device to the first LAN communication device. It should be apparent to those skilled in the art that the present invention is not limited thereto.

2 is a conceptual diagram of a communication system structure in a ship according to an embodiment of the present invention.

Referring to FIG. 2, a communication system in a ship includes LAN communication devices 210 and 220, communication network relay 230, LAN cables 240 and 260, and power lines 250 and 270.

The LAN communication apparatus shown in FIG. 2 includes an electric apparatus, a vessel driving apparatus, and a digital apparatus capable of transmitting and receiving multimedia data in a conventional vessel.

The first LAN communication device 210 communicates with the second LAN communication device 220 via the communication network relay device 230. In this case, the first LAN communication device 210 primarily transmits a communication signal to the communication network relay device 230 through the first LAN cable 240. The communication network relay device 230 transmits a communication signal received from the first LAN communication device 210 to the second LAN communication device 220 through the second LAN cable 260.

Here, the first LAN communication device 210 and / or the second LAN communication device 220 (hereinafter may also be referred to collectively as a LAN communication device) includes a communication network relay unit 211, 221, communication network relay unit 211, 221 performs network switching. That is, the first communication network relay unit 211 may determine whether to transmit a communication signal to be transmitted to the communication network relay device 230 through the LAN cables 240 and 260 or through the power lines 250 and 270. have. In addition, the second communication network relay unit 221 may determine whether to transmit a communication signal to be transmitted to the communication network relay device 230 through the LAN cables 240 and 260 or through the power lines 250 and 270. have. Since the communication network relay units 211 and 221 may have the same or similar functions as the communication network relay apparatus 230 described with reference to FIG. 3, a detailed configuration and operation thereof will be described later.

When there is an error in the transmission of the communication signal through the second LAN cable 260, the communication network relay device 230 transmits a signal to the second LAN communication device 220 through the second power line 270. The first power line 250 means a section between the first LAN communication device 210 and the communication network relay 230 of the power line 180, the second power line 270 is the second of the power line 180. Means a section between the LAN communication device 220 and the communication network relay 230. The first power line 250 and the second power line 270 may be physically connected to each other.

If the communication system in the ship according to an embodiment of the present invention has an error in the transmission and reception of the communication signal through the LAN cable (240, 260), when the communication signal is transmitted and received through the power line (250, 270) Although described with respect to, if there is an error in the transmission and reception of the communication signal through the power line (250, 270), it may be implemented to transmit and receive the communication signal through the LAN cable (240, 260).

3 is a block diagram of a communication network relay device 230 according to an embodiment of the present invention.

Referring to FIG. 3, the communication network repeater 230 includes a LAN communication network signal transceiver 310, a power line communication network signal transceiver 320, a monitoring unit 330, a determination unit 340, and a communication network switching unit 350. It may include. The communication network relay device 230 may further include a report unit 360.

The LAN communication network signal transmitting / receiving unit 310 is a means for transmitting and receiving communication signals with the LAN communication apparatuses 210 and 220 through the LAN cables 240 and 260, and the first LAN cable 240 from the first LAN communication apparatus 210. ) Transmits or receives a communication signal, and transmits or receives a communication signal to the second LAN communication device 220 through the second LAN cable 260.

The power line communication network signal transmitter / receiver 320 is a communication means for transmitting and receiving a communication signal with the LAN communication apparatuses 210 and 220 through the power lines 250 and 270, and the first power line 250 from the first LAN communication apparatus 210. The communication signal is transmitted or received through the second power line 270, and the communication signal is transmitted or received to the second LAN communication device 220 through the second power line 270. In FIG. 3, the power line communication signal transmitting and receiving unit 320 is shown as being included in the communication network relay device 230 of the present invention, but this is only an embodiment of the present invention, and the communication network relay device 230 as a separate device is provided. It may be electrically connected.

The communication signal transmitted and received from the ship may include not only a control signal necessary for controlling an electric device in the ship such as a motor, but also a large amount of multimedia data such as a broadcasting facility, a video call, and a CCTV. Therefore, in order to transmit and receive such communication signals, a communication method in a ship needs a high speed communication method having a bandwidth of several tens of MHz and a transmission speed of 10 Mbps or more.

The communication method in a ship may be a multi-carrier method such as an orthogonal frequency division multiplex (OFDM) method, a DMT method, or a spread spectrum method for high speed communication. The OFDM scheme is strong in fading and has an excellent frequency efficiency. Due to these advantages, considering the characteristics of power lines, which are not only a fading problem in high-speed power line communication, but also a poor environment for transmitting high-frequency signals, the DMT communication method using OFDM communication method is considered. Or the like to transmit and receive communication signals.

To this end, the power line communication signal transmitting and receiving unit 320 of the present invention uses a coupler for loading or separating a frequency signal below 30 MHz into a general power signal, a broadband blocking filter capable of processing a wideband frequency signal, and a spectrum spreading method or a multicarrier method. Modem to use is included. In addition, a signal amplifier for amplifying the attenuated signal to a predetermined signal level is of course included.

The coupler is a means for coupling a power line with a modem or the like which can be included in a LAN communication device so that communication signals can be transmitted and received through the power line. A coupler is a means for synthesizing a communication signal and a carrier signal with a 60 Hz signal, which is a fundamental frequency of a power transmitted through a power line, or separating the synthesized communication signal and a carrier signal. Generally, a coupler is magnetically connected to a power line. It may also be electrically connected to the power line.

The broadband blocking filter is to prevent any one or more of distortion, transmission delay, and bandwidth attenuation of a communication signal transmitted and received through a power line, and is a means for stabilizing transmission and reception of a communication signal. In general, a plurality of communication devices and electric drives may be physically connected to one power line, and a plurality of power line communication networks may be formed by such a connection. In a plurality of power line communication networks formed by a simple connection of power lines, a communication signal may be applied to a communication device or an electric drive device other than the intended communication device, and this phenomenon may cause distortion of the communication signal, transmission delay and bandwidth reduction. A broadband blocking filter is used to solve the problem.

Unlike LAN cables, there are many communication environmental problems such as sudden changes in noise and impedance caused by various equipment connected to power lines, and signal interference or attenuation may occur due to complexity of communication paths.

However, as described above, according to the power line communication signal transmitting and receiving unit 320 of the present invention, not only low speed communication of about 9.6 Kbps but also high speed communication is possible, so that the stable communication state can be maintained even if the communication network in the ship is switched to power line communication. Do.

The monitoring unit 330 is a means for monitoring whether transmission and reception of communication signals through the LAN cables 240 and 260 are normal. In more detail, the monitoring unit 330 includes a second LAN before the LAN communication network signal transmitting and receiving unit 310 transmits a communication signal to the second LAN communication device 220 through the second LAN cable 260. The network connection confirmation signal is transmitted to the second LAN communication apparatus 220 through the cable 260, and a communication network connection response signal is received from the second LAN communication apparatus 220.

Here, the network connection confirmation signal is a communication network relay device 230 to check whether a LAN communication network (ie, a communication network via a LAN cable, hereinafter identical) or a power line communication network (ie, a communication network via a power line, hereinafter identical) is normal. Means a signal transmitted to the LAN communication apparatuses 210 and 220, and the network connection response signal notifies the communication network relay apparatus 230 that the LAN communication apparatuses 210 and 220 have received the communication connection confirmation signal well. Means a signal transmitted to the communication network relay device (230).

The monitoring unit 330 may transmit a communication network connection confirmation signal through the second power line 270 and receive a communication network connection response signal.

The monitoring unit 330 may transmit a network connection confirmation signal to the second LAN communication apparatus 220 through the second LAN cable 260, and receive a communication network connection response signal through the second power line 270; And a network connection confirmation signal to the second LAN communication apparatus 220 through the second power line 270, and a network connection response signal may be received through the second LAN cable 260. (Called second monitoring operation). This operation is performed when the monitoring unit 330 transmits a network connection confirmation signal to the second LAN communication device 220 through the second LAN cable 260, and receives a network connection response signal from the second LAN communication device 220. This may be possible by specifying in advance the path to receive. The determination unit 340 may determine that both the LAN communication network and the power line communication network are normal when the first monitoring operation or the second monitoring operation is normally performed. In this case, it is possible to monitor whether the second LAN communication network is normal and whether the second power line communication network is normal.

The monitoring unit 330 may transmit the network connection confirmation signal and receive the network connection response signal only once before transmitting or receiving the communication signal, or periodically while transmitting and receiving the communication signal.

The determination unit 340 determines whether the communication network connection confirmation signal and the communication network connection response signal are normally transmitted and received through the monitoring unit 330, or the communication network connection confirmation signal and the communication network connection response signal transmitted and received by the monitoring unit 330 are normal. Means to determine whether or not.

When the monitoring unit 330 does not receive the communication network connection response signal, the determination unit 340 determines that the second LAN communication network is abnormal, and notifies the communication network switching unit 350 that the second LAN communication network is abnormal.

The determination unit 340 may also notify the reporting unit 360 that the second LAN communication network is abnormal. Report unit 360 has a communication status report function in the ship as a means for reporting to the system administrator that the communication network is abnormal. Report unit 360 may directly report to the system administrator that the communication network is abnormal through wired or wireless communication means such as short message service (SMS), short-range wireless communication, and may notify that the communication network is abnormal through alarm sounds, sirens, etc. have.

When the determination unit 340 determines that the second LAN cable communication network is abnormal, not only the monitoring unit 330 does not receive the communication network connection response signal, but also does not normally transmit the communication network connection confirmation signal, or the communication network. Even if the connection response signal is received, a case in which the connection response signal is not the same as a reference of the preset network connection response signal may be included.

The reference for the network connection response signal is set in advance to determine whether the signal received by the monitoring unit 330 as the network connection response signal is normal.

The communication network switching unit 350 performs transmission and reception of communication signals between the communication network relay device 230 and the LAN communication devices 210 and 220 through the LAN cables 240 and 260 or through the power lines 250 and 270. It is a means of choosing whether or not to do so.

When receiving the notification that the second LAN communication network is abnormal from the determination unit 340, the communication network switching unit 350 switches the communication network so that transmission and reception of the communication signal is performed through the power line communication network, that is, the second power line 270.

In the above description, the case in which the monitoring unit 330, the determination unit 340, and the communication network switching unit 350 are included in the communication network relay device 230 has been described as an example, but the monitoring unit 330, the determination unit 340, As described above, the communication network switching unit 350 may be included in the LAN communication devices 210 and 220 as well as the communication network relay device 230. That is, since the communication network relays 211 and 221 included in the LAN communication devices 210 and 220 may perform the same or similar functions as the communication network relay device 230 described above, the communication network relays 211 and 221 may be used. Obviously, the components included may be the same as or similar to the components included in the network relay apparatus 230 described above. Therefore, the detailed description of the communication network relays 211 and 221 included in the LAN communication devices 210 and 220 may be omitted here.

4 is a flowchart illustrating a communication network relay method according to an embodiment of the present invention.

In step S410, the LAN communication network signal transceiver 310 receives a communication signal from the first LAN communication device 210 through the first LAN cable 240.

In operation S420, the monitoring unit 330 transmits a communication network connection confirmation signal to the first LAN communication device 220 through the second LAN cable 260. The monitoring unit 330 transmits the communication signal through the second LAN cable 260 before the LAN communication signal transmitting and receiving unit 310 transmits a communication signal to the second LAN communication device 220 through the second LAN cable 260. 2 The network communication confirmation signal is transmitted to the LAN communication device 220.

The monitoring unit 330 may perform the operation of transmitting the communication network connection confirmation signal only once before transmitting the communication signal or periodically during the transmission of the communication signal. In addition, the monitoring unit 330 may transmit a communication network connection confirmation signal through the second power line 270.

The monitoring unit 330 may transmit a communication network connection confirmation signal through the second power line 270 (S420).

In operation S430, the determination unit 340 determines whether the second LAN communication network is normal.

The monitoring unit 330 transmits a communication network connection confirmation signal to the second LAN communication device 220 through the second LAN cable 260 (S420), and receives a communication network connection response signal from the second LAN communication device 220. To wait. When the monitoring unit 330 does not receive the communication network connection response signal, the determination unit 340 determines that the second LAN communication network is abnormal. Even when the monitoring unit 330 receives the network connection response signal, even if the received network connection response signal is not the same as the reference of the preset network connection response signal, the determination unit 340 determines that the second LAN communication network is connected. It may be determined that it is abnormal. In addition, the determination unit 340 may determine that the second LAN communication network is abnormal even when the monitoring unit 330 does not normally transmit the communication network connection confirmation signal through the second LAN cable 260.

The monitoring unit 330 transmits a communication network connection confirmation signal to the second LAN communication device 220 through the second LAN cable 260 (S420), and receives a communication network connection response signal through the second power line 270 ( S430) or when transmitting a network connection confirmation signal through the second power line 270 (S420) and receiving a network connection response signal through the second LAN cable 260 (S430), the monitoring unit 330 It is possible to simultaneously monitor whether the second LAN communication network is normal and whether the second power line communication network is normal.

When determining that the second LAN communication network is abnormal, the determination unit 340 notifies the communication network switching unit 350 that the second LAN communication network is abnormal.

In operation S440, when the second LAN communication network is abnormal, the network switching is performed to the second power line communication network. When determining that the second LAN communication network is abnormal, the determination unit 340 notifies the communication network switching unit 350 that the second LAN communication network is abnormal. The communication network switching unit 350 is notified from the determination unit 340 that the second LAN communication network is abnormal, and switches the communication network from the second LAN communication network to the second power line communication network.

Although not shown in FIG. 4, step S440 may further include reporting to the system administrator that the second LAN communication network is abnormal.

In operation S450, the power line communication network signal transceiver 320 transmits a communication signal through the second power line 270. In operation S440, since the communication network switching unit 350 switches the communication network from the second LAN communication network to the second power line communication network, the power line communication network signal transceiver 320 transmits the communication signal through the second power line 270 to the second LAN communication device. Transmit to 220.

In step S460, the LAN communication network signal transceiver 310 transmits a communication signal through the second LAN cable 260. When the determination unit 340 determines that the second LAN communication network is normal in step S430, the LAN communication network signal transceiver 310 transmits a communication signal to the second LAN communication device 220 through the second LAN cable 260. Send.

5 is a flowchart illustrating a communication network relay method according to another embodiment of the present invention. 5 is a step after step S440 of FIG. 4. In FIG. 5, since step S440 of FIG. 4 is shown, the description of each step is omitted for steps S410 to S440 and S460.

In operation S510, the monitoring unit 330 transmits a communication network connection confirmation signal to the first LAN communication device 220 through the second power line 270.

In operation S520, the determination unit 340 determines whether the second power line communication network is normal. The determination unit 340 determines whether the second power line communication network is normal as described above in step S430.

In operation S530, the power line communication network signal transceiver 320 transmits a communication signal through the second power line 270. In operation S440, since the communication network switching unit 350 switches the communication network from the second LAN communication network to the second power line communication network, the power line communication network signal transceiver 320 may transmit a communication signal through the second power line 270. .

In operation S540, the communication network repeater 230 stops transmitting a communication signal through the second power line 270. In operation S430, the determination unit 340 determines that the second LAN communication network is abnormal. In operation S520, since the determination unit 340 determines that the second power line communication network is abnormal, the communication network relay device 230 determines that the second LAN communication network is abnormal. The attempt to communicate with the second LAN communication device 220 over the communication network or the second power line communication network is stopped.

As described above, the transmission of the network connection confirmation signal and the reception of the network connection response signal may be performed only once before transmitting or receiving the communication signal, or may be periodically performed while the communication signal is transmitted and received. Therefore, when the operation of determining that the second power line communication network is abnormal is performed before transmitting and receiving the communication signal, step S540 may be omitted.

In step S550, the reporting unit 360 reports to the system administrator that the second LAN communication network and the second power line communication network are abnormal.

In the above description, a communication system in a ship uses a LAN communication network as a main communication network and a power line communication network as a backup communication network. However, the communication system in a ship uses a power line communication network as a main communication network and a LAN communication network as a backup communication network. Alternatively, the main communication network or the backup communication network may be selectively used to be either a LAN communication network or a power line communication network according to each section of the ship.

Although the above has been described with reference to embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

1 is a conceptual diagram showing the structure of a LAN communication system in a ship according to the prior art.

2 is a conceptual diagram of a communication system structure in a ship according to an embodiment of the present invention.

3 is a block diagram illustrating a communication network relay apparatus according to an embodiment of the present invention.

4 is a flow chart of a communication network relay method according to an embodiment of the present invention.

5 is a flow chart of a communication network relay method according to another embodiment of the present invention.

<Description of components on main parts of drawing>

140: first primary LAN cable 150: first auxiliary LAN cable

160: second main LAN cable 170: second auxiliary LAN cable

180: power line

210: first LAN communication device 220: second LAN communication device

230: communication network relay device 240: first LAN cable

250: first power line 260: second LAN cable

270: second power line

310: LAN communication network signal transmission and reception unit 320: power line communication network signal transmission and reception unit

330: monitoring unit 340: determination unit

350: network switching unit 360: reporting unit

Claims (13)

In the network relay apparatus in ships, LAN communication network signal transmission and reception unit for transmitting and receiving a communication signal with a LAN communication device via a LAN cable; A power line communication network transceiver for transmitting and receiving the communication signal with the LAN communication apparatus through a power line; A determination unit that determines whether the LAN communication network is abnormal; And And a communication network switching unit for switching the communication network so that the communication signal is transmitted and received by the power line when the determination unit is informed that the LAN communication network is abnormal. The method of claim 1, The power line communication signal transmitting and receiving unit And a communication network transmitting and receiving the communication signal using a DMT communication method utilizing an OFDM communication method. The method according to claim 1 or 2, The power line communication signal transmitting and receiving unit And a coupler magnetically or electrically connected to the power line so that the communication signal can be transmitted and received through the power line. The method of claim 3, wherein The power line communication signal transmitting and receiving unit And a broadband blocking filter for preventing any one or more of distortion, transmission delay, or bandwidth attenuation of a communication signal transmitted and received through the power line. The method of claim 4, wherein The power line communication signal transmitting and receiving unit And a signal amplifier for amplifying the attenuated signal to a predetermined signal level. The method of claim 1, The communication network relay device And a reporting unit which is notified from the determination unit that any one or more of the LAN communication network or the power line communication network is abnormal and reports to a system administrator. The method of claim 1, The communication network relay device, A first monitoring operation of transmitting a network connection confirmation signal to the LAN communication device through the LAN cable and receiving a network connection response signal through the power line; or A monitoring unit configured to transmit the network connection confirmation signal to the LAN communication apparatus through the power line and to perform a second monitoring operation of receiving the network connection response signal through the LAN cable; And the determination unit determines that both the LAN communication network and the power line communication network are normal when the first monitoring operation or the second monitoring operation is normally performed. The method of claim 1, The communication network relay device, Further comprising a monitoring unit for transmitting a network connection confirmation signal to the LAN communication device via the LAN cable, and receives a communication network connection response signal from the LAN communication device, The determining unit, when the monitoring unit does not receive the network connection response signal, when the received communication network connection response signal is not the same as the reference standard of the predetermined network connection response signal, the monitoring unit is normal to the network connection confirmation signal The communication network relay apparatus in ship, characterized in that it is determined that the LAN communication network is abnormal when at least one of the transmission failure. A communication network relay method in a communication system having both a LAN communication network and a power line communication network, (a) determining whether at least one of the LAN communication network and the power line communication network is abnormal; (b) switching the LAN communication network to the power line communication network if it is determined that the LAN communication network is abnormal, or switching the power line communication network to the LAN communication network if it is determined that the power line communication network is abnormal; And (c) transmitting and receiving a communication signal through a communication network switched in the step (b). The method of claim 9, Step (a) is Monitoring whether at least one of the LAN communication network and the powerline communication network is abnormal for the determination; The monitoring may include transmitting the network connection confirmation signal to the LAN communication apparatus through the LAN cable and receiving the network connection response signal through the power line, And transmitting the network connection confirmation signal through the power line and receiving the network connection response signal through the LAN cable. The method of claim 9, Step (a) is And monitoring the network connection confirmation signal and the network connection response signal by transmitting and receiving through the LAN cable or by transmitting and receiving through the power line for the determination.  When the network connection response signal is not received, when the received network connection response signal is not the same as a preset criterion of the network connection response signal. And determining that the communication network is abnormal. The method of claim 9, The communication network relay method And reporting to a system administrator that at least one of the LAN communication network and the power line communication network is abnormal. The method of claim 9, Step (c) is (d) determining whether the switched communication network is abnormal; And (e) if it is determined that the switched communication network is abnormal, reporting a system administrator that at least one of the LAN communication network and the powerline communication network is abnormal.
KR1020090015709A 2009-02-25 2009-02-25 Ship communication apparatus and the method thereof KR20100096697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090015709A KR20100096697A (en) 2009-02-25 2009-02-25 Ship communication apparatus and the method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090015709A KR20100096697A (en) 2009-02-25 2009-02-25 Ship communication apparatus and the method thereof

Publications (1)

Publication Number Publication Date
KR20100096697A true KR20100096697A (en) 2010-09-02

Family

ID=43004198

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090015709A KR20100096697A (en) 2009-02-25 2009-02-25 Ship communication apparatus and the method thereof

Country Status (1)

Country Link
KR (1) KR20100096697A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230039427A (en) * 2021-09-14 2023-03-21 국방과학연구소 Method for recovering of fading for maritime communications, communication apparatus and system thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230039427A (en) * 2021-09-14 2023-03-21 국방과학연구소 Method for recovering of fading for maritime communications, communication apparatus and system thereof

Similar Documents

Publication Publication Date Title
EP2267915B1 (en) Power line communication system on aircraft
US20160269078A1 (en) Methods and system for increasing data transmission rates across a three-phase power system
CA2631758C (en) Control channel for vehicle systems using the vehicle&#39;s power distribution system
US7920588B2 (en) Data communications system and method of data transmission
US20100034298A1 (en) Rail vehicle internal information network device
KR102051382B1 (en) Vdes system able to communication of long distance, using a repeater to ship station
CN112235879A (en) Railway train control dual-mode wireless terminal and implementation method
KR20100096697A (en) Ship communication apparatus and the method thereof
KR20130064310A (en) Ship system using power line communication
JP2007221251A (en) Multiple transmission system
CN114189285A (en) pRRU remote system and communication processing method based on same
JP2007274273A (en) Radio communication system
JP5055955B2 (en) Railway vehicle transmission equipment
WO2011013705A1 (en) Monitor/control device and monitor target device
JP2006067239A (en) Transmission equipment, fault notification method therefor, and transmission system
EP2151965B1 (en) Method and device for data processing and communication system comprising such device
JP2004015637A (en) Radio relay system and its reset method
CN218450145U (en) Remote control device for channel machine
KR101856456B1 (en) Train radio interfce device in LTE-R system and operation method thereof
CN112602291B (en) Communication device, system and method thereof
JP4246925B2 (en) Multi-carrier transmission method and transmission apparatus
JP2008078928A (en) Repeater equipment
JP2008199291A (en) Communicating system
JPH0193232A (en) Inter-device communication control system
JP2001111301A (en) Antenna device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application