KR101986286B1 - Apparatus and method for controlling base station in VHF data exchange system - Google Patents

Abstract

The present invention relates to a device and a method for controlling a base station in a marine microwave data exchange system. The device of the present invention comprises: an input/output communication unit for exchanging data with a plurality of transceiving devices; a switching unit for connecting a plurality of transceiving antennas and a single receiving antenna to the transceiving devices through switching; an input/output controller for controlling the switching in the switching unit; a global navigation satellite system (GNSS) signal distribution unit for distributing a GNSS signal received from a GNSS antenna; a signal analysis and time synchronization unit for analyzing the distributed GNSS signal to convert the same into time synchronization information, and providing the converted time synchronization information for the transceiving devices; a land communication unit for communicating with a marine traffic control center or a land operating center through a land network; and a main controller for controlling and operating a base station control device, dividing the transceiving devices into first and second transceiving devices to operate the same in transmission and reception modes, respectively.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VHF data exchange system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maritime communication technology, and more particularly, to an apparatus and method for controlling a base station in a maritime microwave data exchange system.

Conventional Automatic Identification System (AIS) for maritime communication selects one of two channels designated by a 25 KHz bandwidth and transmits 256-bit data at a fixed transmission rate of 9.6 Kbps. At this time, the AIS is configured to transmit using one slot resource divided into 2,250 26.667ms with one frame as one frame. Exceptionally, an application message having a low priority such as 6 (Addressed binary message), 8 (Binary broadcast message), 26 (Multislot binary message with Communications State) , 8th, 26th messages have a priority of 4) requires one or more slots. AIS is defined to transmit data using up to five consecutive slots (see ITU-R M.1371-5, 3.2.2.11).

Table 1 below shows the configuration of the sixth message among the application messages.

However, this priority is applied to both the received message and the message to be transmitted, but is limited to the transmission layer to and from the presentation interface (PI). The priority of the message sent by the other line does not affect the transmission of the application message of the charity. Therefore, when the amount of usage of the application message increases, a priority is given to a message such as a position report, a position report, an assigned position report, and a position report (special position report) The slot resources to be used by the mandatory messages having a high ranking (the first, second and third messages have the priority of 1) becomes insufficient. Therefore, communication traffic overload problem may occur. In addition, when the available slot resources are not sufficient, there is a possibility that a slot collision occurs frequently according to an access scheme. Slot retransmission and so on, the data transmission delay of essential messages may occur.

As a countermeasure against this, the International Maritime Organization (IMO) has been able to provide services such as ASM (Application Specific Message) messages by allocating a dedicated ASM channel for processing multi-slot and low priority messages Respectively. The International Maritime Organization designated 16 MSP (Maritime Service Portfolio) as an essential service to provide a higher level of maritime communication service, and a ground and satellite VDE Data Exchange (VDE) channel . These AIS (Automatic Identification System), ASM (Application Specific Messages) and VDE (VHF data exchange) are referred to as VDES (VHF Data Exchange System) International conventions are underway to establish relevant regulations.

Among them, VDE can transmit large data packets, such as video service, which are not supported by the existing AIS at a high bandwidth in a high speed. To do this, VDE has a feature that it can selectively transmit a multilevel modulation method such as QPSK, 8PSK, and 16QAM, and can transmit up to 307.2 Kb per second with a bandwidth of up to four channels of 100 KHz.

VDE can allocate channel resources from base stations or satellites to transmit these large data packets. However, this channel resource allocation information is included in the announcement message of the base station called a bulletin board, and this base station announcement message occurs at the beginning of each frame. In addition, it is specified that frequencies and slots can be specified and used within the available channel resources, and this information is propagated to surrounding vessels through a notification message of the base station called an announcement.

VDES should be given the highest priority on AIS location reporting, safety-related information, and should be capable of receiving and processing all specific digital messages and designated calls specified by ITU-R-related recommendations. In addition, the VDES shall be capable of transmitting additional safety information on request. The VDES should be able to continue to operate while cruising or anchoring. VDES shall utilize TDMA technology, access method and data transmission method by synchronous method as specified in Recommendation ITU-R M.1371. VDES has various operating modes including an autonomous mode, an assigned mode, and a polled mode. Generally, the VDES system consists of AIS (Automatic Identification System), ASM (Application Specific Message), VDE (VHF Digital Exchange) and SAT (Satellite) functions (see ITU-R M.2092).

AIS is part of VDES in ship stations, coast stations, and satellites. AIS should have the highest priority in VDES. And all other functions must be configured so that the AIS is not interrupted and the transmission schedule is not delayed. The AIS portion of the ship VDES shall conform to the requirements for Class A shipborne equipment using the SOTDMA technology described in Recommendation ITU-R M.1371, except that channel switching is not used. The AIS portion of the coast station VDES shall conform to the requirements for the AIS base station described in Recommendation ITU-R M.1371, except that channel switching is not used in connection with the VDES. AIS has the highest priority for all functions at the VDES coastal base stations. In addition, all other functions must be configured so that the AIS is not adversely affected and the transmission schedule is not delayed.

The ASM allocates two additional channels in accordance with the increase of text and binary application service messages through 12, 13, 14, 6, 7, 8, 25 and 26 of the existing AIS , A communication system developed to enable data communication with a capacity larger than that of the conventional AIS-ASM (for example, within 2 to 8 times speed), and constitutes a part of VDES communication system.

VDE provides about 30 times faster speed than AIS communication at sea and coast, up to about 300Kb / s, can communicate with 1 ~ 4 channels, and can also be used as a satellite communication method. Table 2 below shows the data communication speed of newly developed ASM and VDE.

In order to manage and control the AIS transceiver for the base station, a base station controller dedicated to the AIS transceiver is constructed and operated.

Korean Patent Publication No. 10-2006-0012709 (published on February 09, 2006)

The newly introduced VHF Data Exchange System (VDES) for the land base station will be developed as a next generation AIS device integrating a conventional AIS (Automatic Identification System) ship automatic identification device, ASM and / or VDE. In addition, the basic policy is to operate the redundant system in case of an error in the equipment. The problems and considerations are as follows.

In addition to the conventional two VHF antennas, four antennas (two for ASM and two for VDE) must be additionally installed on the land base station, resulting in a situation in which the installation space becomes insufficient. If necessary, expensive steel tower construction should be carried out.

Significant costs are incurred in constructing additional thick RF cables for land base stations.

In addition to the conventional two GNSS antennas for transmitting and receiving AIS, four GNSS antennas must be installed. When a failure occurs in reception of the GNSS information, a failure occurs in the transmission function in the TDMA communication.

In order to solve the above-described problems, embodiments of the present invention are capable of operating an on-land VDES base station communication system unattended in a maritime microwave data exchange system, and capable of efficiently constructing and operating a VDES base station communication system on the land And a base station control apparatus and method in a maritime microwave data exchange system.

Embodiments of the present invention are directed to a base station control device in a maritime microwave data interchange system capable of operating with minimal installation of a VHF antenna and a GNSS antenna of an AIS, ASM and / or VDE transceiver constituting a terrestrial VDES base station communication system And methods.

In addition, embodiments of the present invention can provide a base station control apparatus and method in a maritime superfrequency data exchange system capable of providing a new GNSS signal to a VDES base station communication system on the land using a time synchronization apparatus when a failure of GNSS reception occurs .

In addition, the embodiments of the present invention can be applied to a navigation system capable of relaying AIS data and ASM data using VDE communication when mutual information exchange is difficult due to a fault of a wired communication network between a maritime control center (VTS) And to provide a base station control apparatus and method in a microwave data exchange system.

According to an embodiment of the present invention, there is provided a base station control apparatus in a VHF Data Exchange System for maritime, comprising: an input / output communication unit for exchanging data with a plurality of transceivers; A switching unit connecting a plurality of transmitting and receiving antennas and a single receiving antenna to each of the plurality of transmitting and receiving devices through switching; An input / output controller for controlling switching in the switching unit; A maritime traffic control center or an onshore communication center that communicates with the land operation center through a land network; And a main controller for controlling and operating the base station control device and dividing the plurality of transmitting and receiving devices into a first transmitting and receiving device and a second transmitting and receiving device and respectively operating the transmitting and receiving devices in a transmitting mode and a receiving mode, A base station control apparatus may be provided.

Wherein the switching unit comprises: a first switch for connecting the first transceiver and the plurality of transmission / reception antennas so that the first transceiver operates in a transmission mode; A second switch connected to the first switch and connecting the second transceiver and the single receive antenna so that the second transceiver operates in a receive mode; And a switching control unit for controlling the first switch and the second switch, and switching the communication modes of the plurality of transceivers.

Wherein the switching controller switches the connection of the second transceiver and the single reception antenna so that the second transceiver operates in a transmission / reception mode if the first transceiver is in failure, and switches the connection of the second transceiver to the second transceiver, And can be connected to the plurality of transmission / reception antennas through the switch and the first switch.

If the second transceiver is out of order, the switching controller releases the connection with the second transceiver and the single reception antenna, and the main controller can operate the first transceiver in the transmission / reception mode.

The base station controller includes: a GNSS signal distributor for distributing a GNSS signal received from a single Global Navigation Satellite System (GNSS) antenna; And a signal analysis and time synchronizing unit for analyzing the distributed GNSS signal to convert it into time synchronization information and providing the converted time synchronization information to the plurality of transceivers.

The signal analysis and time synchronization unit may generate a GNSS generation signal using time synchronization information when a failure occurs in the GNSS antenna and may convert the GNSS generation signal into time synchronization information and provide the time synchronization information to the plurality of transceivers.

The signal analysis and time synchronization unit includes: a time signal generator for generating a time signal using time synchronization information when a failure of the GNSS antenna occurs; A GNSS signal generator for generating a GNSS generation signal using the generated time signal; And a time synchronization controller for controlling the time signal generator and the GNSS signal generator, and converting the GNSS generation signal into time synchronization information and providing the time synchronization information to the plurality of transceivers.

The plurality of transceivers include an AIS (Automatic Identification System) transceiver, an ASM (Application Specific Message) transceiver, and a VDE (VHF Digital Exchange) transceiver. The main controller, when an error occurs in the terrestrial network communication, The VDE transceiver may be used to transmit the terrestrial network fault message to the maritime traffic control center or the onshore operation center.

The main controller stores the received AIS data or ASM data in a memory equipped with the AIS data or the ASM data when it encounters an abnormality in the terrestrial communication in the terrestrial communication unit, encodes the stored AIS data or ASM data into VDE data, To the maritime traffic control center or the onshore operation center.

The main controller broadcasts the land station slot reservation information for transmitting the stored AIS data or ASM data through the VDE transceiver, and transmits the AIS data or the ASM data using the reserved slot reserved according to the land station slot reservation information. ASM data to the maritime traffic control center or the onshore operation center via the VDE transceiver.

According to another embodiment of the present invention, there is provided a base station control method performed by a base station control apparatus in a maritime microwave data exchange system, comprising: exchanging data with a plurality of transmission / reception apparatuses; A plurality of transmitting and receiving antennas and a single receiving antenna are connected to the plurality of transmitting and receiving devices through switching; And communicating with a maritime traffic control center or a land operation center via a land network, wherein each of the plurality of transmitting and receiving devices is divided into a first transmitting and receiving device and a second transmitting and receiving device, And a receiving mode, respectively.

The step of connecting through the switching may include connecting the first transceiver and the plurality of transmission / reception antennas so that the first transceiver operates in a transmission mode; Connecting the second transceiver and the single receive antenna so that the second transceiver operates in a receive mode; And switching the communication modes of the plurality of transceivers.

Wherein the switching of the communication modes of the plurality of transceivers switches the connection of the second transceiver and the single reception antenna so that the second transceiver operates in the transmission / reception mode if the first transceiver fails, And can connect the second transceiver to the plurality of transceiver antennas.

The switching of the communication modes of the plurality of transceivers may include releasing the connection between the second transceiver and the single reception antenna when the second transceiver is out of order and switching the first transceiver in the transceiving mode .

The method includes distributing a GNSS signal received from a single Global Navigation Satellite System (GNSS) antenna; And analyzing the distributed GNSS signal to convert it into time synchronization information, and providing the converted time synchronization information to the plurality of transceivers.

The method may further include generating a GNSS generation signal using time synchronization information when the GNSS antenna fails, converting the GNSS generation signal into time synchronization information, and providing the GNSS generation signal to the plurality of transceivers .

The method includes generating a time signal using time synchronization information when a failure of the GNSS antenna occurs; Generating a GNSS generation signal using the generated time signal; And converting the GNSS generation signal into time synchronization information and providing the time synchronization information to the plurality of transceivers.

The method includes the steps of: (a) transmitting and receiving an AIS (Automatic Identification System) transmission / reception device, an ASM (Application Specific Message) transmission / reception device, and a VDE (VHF Digital Exchange) transmission / reception device, Transmitting the terrestrial network fault message to the maritime traffic control center or the land operation center using the VDE transceiver.

The method comprises the steps of: storing received AIS data or ASM data in a memory; And encoding the stored AIS data or ASM data into VDE data and transmitting the encoded AIS data or ASM data to the maritime traffic control center or the land operation center through the VDE transceiver.

The method may further comprise broadcasting the land station slot reservation information for transmitting the stored AIS data or ASM data through the VDE transceiver, wherein the transmitting to the maritime traffic control center or the land operation center comprises: And transmit the stored AIS data or ASM data to the maritime traffic control center or the land operation center through the VDE transceiver using the reserved slot reserved according to the land station slot reservation information.

Embodiments of the present invention can operate an off-shore VDES base station communication system unattended and a land-based VDES base station communication system efficiently in an offshore microwave data exchange system.

Embodiments of the present invention can operate VHF antennas and GNSS antennas of AIS, ASM and / or VDE transceivers constituting a VDES base station communication system with minimum installation.

In addition, embodiments of the present invention can provide a new GNSS signal to the VDES base station communication system using a time synchronization device when a failure of GNSS reception occurs.

In addition, embodiments of the present invention can relay AIS data and ASM data using VDE communication when it is difficult to mutually exchange information due to a fault of a wired communication network between a maritime control center (VTS) or a land operation center and a base station.

As described above, the embodiments of the present invention facilitate the construction of a newly introduced on-land VDES base station communication system and can respond immediately when a fault occurs.

1 is a block diagram of a general base station communication system in a maritime microwave data exchange system.
2 is a configuration diagram of a base station communication system in a maritime microwave data exchange system according to an embodiment of the present invention.
3 is a configuration diagram of a base station control apparatus in a maritime microwave data exchange system according to an embodiment of the present invention.
4 is a configuration diagram of a switching unit of a base station control apparatus according to an embodiment of the present invention.
5 and 6 are diagrams illustrating a process of switching from a receiving apparatus to a transmitting and receiving apparatus when a failure occurs in a transmitting apparatus in a base station control method according to an embodiment of the present invention.
7 is a flowchart illustrating a process of switching from a transmitting apparatus to a transmitting / receiving apparatus when a failure of the receiving apparatus occurs in the base station controlling method according to an embodiment of the present invention.
8 is a configuration diagram of a GNSS signal distribution unit of a base station control apparatus according to an embodiment of the present invention.
9 is a block diagram of a signal analysis and time synchronization unit of the base station control apparatus according to an embodiment of the present invention.
10 is a flowchart illustrating a time synchronization process in a base station control method according to an embodiment of the present invention.
11 is a flowchart illustrating a time synchronization process in a base station control method according to an embodiment of the present invention.
12 is a flowchart illustrating a process of relaying AIS and ASM data to a VDE when a terrestrial communication network failure occurs in a base station control method according to an embodiment of the present invention.
FIG. 13 is a flowchart illustrating a process of relaying AIS and ASM data to a VDE when a failure occurs in a land-based communication network in a BS control method according to an exemplary embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

The base station of the present disclosure may be any type of interfacing device such as an Advanced Base Station (ABS), an HR-BS, a Site Controller, a Base Transceiver System (BTS), an Access Point (AP), or any other type of interfacing device But are not limited to these.

A base station may also include other base stations and / or network elements (not shown), such as a base station controller (BSC), a radio network controller (RNC), relay nodes, (Remote Area Network). The base station may be configured to transmit and / or receive wireless signals within a particular geographic area, which may be referred to as a cell (not shown).

A base station may be referred to as a coast station, a land base station, a satellite base station, a base station, or some other terminology.

1 is a block diagram of a general base station communication system in a maritime microwave data exchange system.

As shown in FIG. 1, a general base station communication system 10 includes a plurality of communication devices and a base station control device 100.

The general base station communication system 10 further includes a first ASM transceiver 130, a second ASM transceiver 140 and a first VDE transceiver 150 (not shown) in addition to the general first and second AIS transceivers 110 and 120, And a second VDE transceiver 160 are installed in the second VDE transceiver 160. In addition, the basic policy is to operate the redundant system in case of an error in the equipment. The problems and considerations are as follows.

Typical first and second AIS transceivers 110 and 120 include two VHF antennas for AIS communication. At this time, in addition to the two VHF antennas, four antennas (two types for ASM and two types for VDE) are additionally installed in general base station communication system 10, that is, six VHF antennas 111, 121, 131, 141, 151, 161) must be installed, so that the installation space may be shortened. If necessary, expensive steel tower construction should be carried out.

Significant costs may also be incurred to construct additional thick RF cables for base stations.

In addition, in the general base station communication system 10, four GNSS antennas are installed in addition to the two GNSS antennas for transmitting and receiving AIS, that is, six GNSS antennas 112, 122, 132, 142, 152 and 162 are to be installed. When a failure occurs in reception of the GNSS information, a failure occurs in the transmission function in the TDMA communication.

As described above, the plurality of transceivers in the general base station communication system 10 includes six VHF antennas 111, 121, 131, 141, 151 and 161 for data transmission and reception and six GNSS antennas 112, 142, 152, 162 are to be installed. That is, for the construction of the general VDES base station communication system 10, six VHF antennas and six GNSS antennas are required as shown in FIG.

However, the base station communication system 20 to which the base station control apparatus 200 according to an embodiment of the present invention is applied includes four VHF antennas 201 to 204 and one GNSS antenna 205. The base station communication system 20 according to an embodiment of the present invention is very easy to construct due to a decrease in the number of antennas. Here, the present invention will be described with the SAT function, that is, the satellite communication configuration, removed in consideration of the coastal communication environment of Korea. However, the present invention is not limited to a satellite communication configuration, but may include a satellite communication configuration.

2 is a configuration diagram of a base station communication system in a maritime microwave data exchange system according to an embodiment of the present invention.

2, the land-based base station communication system 20 according to an embodiment of the present invention includes a plurality of transceivers 110 to 160 and a base station control apparatus 200. [

The specific configuration and operation of each component of the base station communication system 20 according to the embodiment of the present invention shown in FIG. 2 will be described below.

The plurality of transceivers 110 to 160 includes a first AIS transceiver 110, a second AIS transceiver 120, a first ASM transceiver 130, a second ASM transceiver 140, a first VDE transceiver 130, Device 150, a second VDE transceiver 160, a single receive antenna for transmitting and receiving data, and a plurality of transmit and receive antennas 201-204.

As described above, for the construction of the general VDES base station communication system 20, six VHF antennas and six GNSS antennas are required as shown in FIG. However, the base station communication system 20 to which the base station control apparatus 200 according to an embodiment of the present invention is applied includes four VHF antennas 201 to 204 and a single single GNSS antenna 205. The base station communication system 20 according to an embodiment of the present invention is very easy to construct due to a decrease in the number of antennas.

As an example of the VDES (VHF Digital Exchange System), a plurality of transceivers include first and second AIS (Automatic Identification System) transceivers 110 and 120 which are two AIS transceivers, two ASM transceivers First and second application specific message (ASM) transceivers 130 and 140, and first and second VDE (VHF Digital Exchange) transceivers 150 and 160 that are two types of VDE transceivers.

Here, among the four VHF antennas 201 to 204, the VHF antenna 3 formula is used for transmission only. A VHF antenna type 1 is used for receiving only. The base station communication system 20 includes three VHF antennas and one VHF antenna so that communication between the base station controller 200 and the ship device for VDES can be prevented in advance due to slot collision or transmission output have.

The base station control apparatus 200 totally manages and controls the land base stations in the maritime microwave data exchange system 20. To this end, the base station control apparatus 200 is connected to four VHF antennas 201 to 204 and one single GNSS antenna 205. The base station control apparatus 200 includes a first AIS transceiver 110, a second AIS transceiver 120, a first ASM transceiver 130, a second ASM transceiver 140, a first VDE transceiver 140, The first VDE transceiver 150 and the second VDE transceiver 160 and exchanges data through communications such as VHF, GNSS, RS-2322, and LAN, controls the plurality of transceivers 110 to 160 . The base station control device 200 communicates with the maritime control center 11 and the onshore operation center 12 through a communication network and detects a failure or an abnormal situation occurring in the plurality of transceivers 110 to 160, Can be reported.

3 is a configuration diagram of a base station control apparatus in a maritime microwave data exchange system according to an embodiment of the present invention.

3, the land-based base station control apparatus 200 in the maritime microwave data exchange system according to an embodiment of the present invention includes an input / output communication unit 210, a switching unit 220, an input / output controller 230, A GNSS signal distribution unit 240, a signal analysis and time synchronization unit 250, a land communication unit 260, and a main controller 270. Here, the base station control apparatus 200 may further include an uninterruptible power supply auxiliary unit 280 and a rack fan 290.

Hereinafter, the specific configuration and operation of each component of the base station control apparatus 200 in the maritime microwave data exchange system according to the embodiment of the present invention will be described.

The input / output communication unit 210 exchanges data with a plurality of the transmission / reception devices 110 to 160. The input / output communication unit 210 may be implemented as a VDES PI communication unit for exchanging data through a VDES presentation interface. For example, the input / output communication unit 210 is for exchanging data with the six types of transceivers (AIS 2, ASM 2, and VDE 2).

The switching unit 220 connects a plurality of transmission / reception devices 110 to 160, a single reception antenna for data transmission / reception of the plurality of transmission / reception devices 110 to 160, and a plurality of transmission / reception antennas 201 to 204 through switching . For example, the switching unit 220 may be implemented as a VHF RF switch device for connecting a VHF antenna for a six-type transceiver.

The input / output controller 230 controls switching in the switching unit 220. For example, the input / output controller 230 controls a VHF RF switch device that controls I / O (input / output) and switches a VHF RF signal.

The GNSS signal distributor 240 distributes the GNSS signal received from the Global Navigation Satellite System (GNSS) In one example, the GNSS signal distributor 240 receives the GNSS signal from the single GNSS antenna 205 to distribute the GNSS signal to the transceivers of the six formulas.

The signal analysis and time synchronization unit 250 analyzes the GNSS signal distributed from the GNSS signal distribution unit 240, converts the analyzed GNSS signal into time synchronization information, and provides the converted time synchronization information to the plurality of transceivers 110 to 160 . The signal analysis and time synchronization unit 250 generates a GNSS generation signal using the time signal generator 251 and the GNSS signal generator 252 provided when the reception failure of the GNSS antenna 205 due to lightning or the like occurs , Converts the generated GNSS generation signal into time synchronization information of the NMEA0183 format, and provides it to the plurality of transceivers 110 to 160.

The terrestrial communication unit 260 communicates with a VTS (Vessel Traffic Service System) or a terrestrial operation center (12) via a terrestrial network.

The main controller 270 is connected to the input / output communication unit 210, the input / output controller 230, the signal analysis and time synchronization unit 250, and the land communication unit 260 to control the respective components of the base station control device 200. The main controller 270 controls and operates the respective components of the base station controller 200. The main controller 270 divides the plurality of transceivers 110 to 160 into a first transceiver and a second transceiver, . For example, the first transceiver may include a first AIS transceiver 110, a first ASM transceiver 130, and a first VDE transceiver 150. The second transceiver may include a second ASM transceiver 140, a second AIS transceiver 120, and a second VDE transceiver 160. Here, the first transceiver and the second transceiver are not limited to the group divided into the specific transceiver. The main controller 270 can be operated by dividing the VDE transceiver into a first VDE transceiver 150 operating in a transmission mode and a first VDE transceiver 150 operating in a reception mode.

The uninterruptible power supply auxiliary unit 280 provides power to the internal components of the base station control device 200. [

The rack fan 290 is made up of a fan for cooling the uninterruptible power supply auxiliary unit 280.

4 is a configuration diagram of a switching unit of a base station control apparatus according to an embodiment of the present invention.

4, the switching unit 220 of the base station control apparatus 200 includes a first switch 221, a second switch 222, and a switching control unit 223 do.

The specific configuration and operation of each element of the switching unit 220 of the base station control apparatus 200 according to an embodiment of the present invention will be described below.

The first switch 221 connects the first transceiver and the plurality of transceivers 201-203 so that the first transceiver operates in the transmission mode among the plurality of transceivers 110-160. For example, the first switch 221 includes three VHF transceiving antennas 201 to 203 for transmitting and receiving the first AIS transceiver 110, the first ASM transceiver 130 and the first VDE transceiver 150, And converts the first AIS transceiver 110, the first ASM transceiver 130 and the first VDE transceiver 150 into a transmission-only mode.

The second switch 222 is connected to the first switch 221. The second switch 222 connects the second transceiver and the single receive antenna 204, which are dedicated to reception, so that the second transceiver is operated in the receive mode among the plurality of transceivers 110 to 160. For example, the second switch 222 connects the second AIS transceiver 120, the second ASM transceiver 140 and the second VDE transceiver 160 with a VHF single receive antenna 204 that is dedicated for receiving The second AIS transceiver 120, the second ASM transceiver 140 and the second VDE transceiver 160 into the receive-only mode.

The switching control unit 223 controls the first switch 221 and the second switch 222 to switch the communication modes of the plurality of transceivers 110 to 160. For example, the switching controller 223 switches the first and second switches 221 and 222, which are two RF switches, according to an external signal.

The switching process of the communication mode including the transmission mode and the reception mode when the first transceiver is in failure or the second transceiver is in failure will be described in detail.

First, a case where the first transceiver is failed will be described. The switching control unit 223 switches the connection of the second transceiver and the single reception antenna 204 so that the second transceiver operates in the transmission / reception mode if the first transceiver is out of order. Through this switching, the switching controller 223 connects the second transceiver to the plurality of transmitting and receiving antennas 201 through 203 through the second switch 222 and the first switch 221.

Next, a case where the second transceiver is failed will be described. When the second transceiver is out of order, the switching controller 223 releases the connection with the second transceiver and the single receive antenna 204. [ Then, the main controller 270 operates the first transceiver in the transmission / reception mode.

5 and 6 are diagrams illustrating a process of switching from a receiving apparatus to a transmitting and receiving apparatus when a failure occurs in a transmitting apparatus in a base station control method according to an embodiment of the present invention.

As shown in FIG. 5, in step S101, the main controller 270 of the base station control apparatus 200 confirms an abnormality of a transmitting apparatus operating in a transmission mode among a plurality of the transmitting and receiving apparatuses 110 to 160. For example, the first AIS transceiver 110 in the plurality of transceivers 110 to 160 may be a transmitter operating in a transmission mode, and the second AIS transceiver 120 may be a receiver operating in a reception mode. The same applies to ASM and VDE other than AIS. Here, the main controller 270 can check the alarm message of the transmitting apparatus and confirm the occurrence of an error.

In step S102, the main controller 270 checks whether or not an error has occurred in the transmitting apparatus.

If it is determined in step S103 that the error has occurred in the transmission apparatus, the main controller 270 instructs the input / output controller 230 to switch the RF of the transmission apparatus having the failure to the reception apparatus. On the other hand, if it is determined in step S102 that no abnormality occurs in the transmitting apparatus, the main controller 270 repeats step S102 of confirming whether or not an abnormality occurs in the transmitting apparatus.

In step S104, the input / output controller 230 instructs the switching unit 220 to switch the RF of the failed transmission device to the receiving device.

In step S105, the switching unit 220 switches the first switch 221 and the second switch 222 to switch the RF of the failed transmission device to the receiving device. That is, the switching unit 220 can switch the transmission / reception antenna connected to the transmission device in which the failure occurs to the reception device in which the failure has not occurred. At this time, the connection between the transmission device in which the failure occurs and the transmission / reception antenna is released.

6, in step S201, the switching unit 220 reports to the main controller 270 via the input / output controller 230 that the transmission device having failed is switched to the receiving device.

In step S202, the main controller 270 instructs the receiving apparatus having no failure to switch to the transmission / reception mode.

In step S203, the main controller 270 confirms that the receiving apparatus having no failure switches to the transmission / reception mode and reports the switching state to the land center.

In step S204, the main controller 270 relays the transmission / reception message of the reception apparatus switched to the transmission / reception mode.

7 is a flowchart illustrating a process of switching from a transmitting apparatus to a transmitting / receiving apparatus when a failure of the receiving apparatus occurs in the base station controlling method according to an embodiment of the present invention.

In step S301, the main controller 270 of the base station control apparatus 200 confirms an abnormality of the receiving apparatus in the plurality of transmitting / receiving apparatuses 110 to 160. Here, the main controller 270 can check an alarm message of the receiving apparatus to confirm an error occurrence.

In step S302, the main controller 270 determines whether or not an error has occurred in the receiving apparatus.

If it is determined in step S303 that the error has occurred in the receiving apparatus, the main controller 270 instructs the transmitting apparatus having no failure to switch to the transmitting / receiving mode. On the other hand, if it is determined in step S302 that there is no abnormality in the receiving apparatus, the main controller 270 performs step S302 to check whether there is an abnormality in the receiving apparatus.

In step S304, the main controller 270 confirms that the transmission apparatus having no failure switches to the transmission / reception mode and reports the switching state to the land center.

In step S305, the main controller 270 relays transmission / reception messages of the transmission apparatus that has switched to the transmission / reception mode.

8 is a configuration diagram of a GNSS signal distribution unit of a base station control apparatus according to an embodiment of the present invention.

8, the GNSS signal distributor 240 of the base station controller 200 according to an embodiment of the present invention includes a GNSS signal distributor 241, a first GNSS signal amplifier 242, a second GNSS signal distributor 242, A signal amplifier 243 and a GNSS signal switching controller 244.

The first GNSS signal amplifier 242 amplifies the GNSS signal received from the GNSS antenna. The first GNSS signal amplifier 242 may amplify the GNSS signal received from the GNSS antenna and forward it to the six transceivers.

The GNSS signal distributor 241 has a plurality of switches and switches the plurality of switches to distribute the GNSS signal amplified by the first GNSS signal amplifier 242 to the plurality of transceivers 110 to 160. The GNSS signal distributor 241 distributes the GNSS signal received from the GNSS antenna and the second GNSS generated signal using the time synchronization information at the time of occurrence of the failure of the GNSS antenna to the transceiver of the equation (6).

The second GNSS signal amplifier 243 amplifies the GNSS generation signal received from the signal analysis and time synchronization unit 250. The second GNSS signal amplifier 243 amplifies the GNSS generation signal received from the signal analysis and time synchronization unit 250 and transmits the amplified signal to the six transceivers.

The GNSS signal switching controller 244 controls signal switching of the switches provided in the GNSS signal distributor 241. [ The GNSS signal switching controller 244 can control the signal branching of the switch provided through the external serial communication.

9 is a block diagram of a signal analysis and time synchronization unit of the base station control apparatus according to an embodiment of the present invention.

9, the signal analysis and time synchronization unit 250 of the base station control apparatus 200 according to an embodiment of the present invention includes a time signal generator 251, a GNSS signal generator 252, And a synchronization controller 253.

The time signal generator 251 generates the time signal using the preset time synchronization information if the time synchronization information is not provided due to the occurrence of the failure of the GNSS antenna. That is, the time signal generator 251 can generate a new GNSS generation signal by generating a precise time frequency when the GNSS antenna fails due to a lightning or the like.

The GNSS signal generator 252 generates a GNSS generation signal using the time signal generated by the time signal generator 251. The GNSS signal generator 252 converts the time signal provided from the time signal generator 251 to generate a GNSS generation signal.

The time synchronization controller 253 controls the time generation process in the time signal generator 251 and the signal generation process in the GNSS signal generator 252. The time synchronization controller 253 controls the time signal generator 251 and the GNSS signal generator 252 and converts the GNSS generation signal into second time synchronization information and provides the same to the plurality of transceivers 110 to 160.

Further, the time synchronization controller 253 analyzes the GNSS signal and converts it into time synchronization information in the form of NMEA0183, and provides it to the transceiver of six types. The time synchronization information may be used as time synchronization information of all devices operating in the base station communication system 20. [

10 is a flowchart illustrating a time synchronization process in a base station control method according to an embodiment of the present invention.

In step S401, the main controller 270 of the base station control device 200 confirms that an abnormality has occurred when the GNSS is received. Here, the main controller 270 can check the alarm message and confirm the abnormal occurrence of the GNSS reception.

In step S402, the main controller 270 determines whether there is an abnormality in GNSS reception.

If there is an abnormality in GNSS reception in step S403, the main controller 270 instructs the signal analysis and time synchronization unit 250 to switch to a new GNSS generation signal instead of the GNSS signal received from the GNSS antenna I command to do. On the other hand, if it is determined in step S402 that there is no abnormality in the reception of the GNSS, the main controller 270 performs step S402 to determine whether there is an abnormality in reception of the GNSS.

In step S404, the signal analysis and time synchronization unit 250 commands the GNSS signal distribution unit 240 to interwork with the signal analysis and time synchronization unit 250.

In step S405, the GNSS signal distribution unit 240 cancels reception of a signal received from the GNSS antenna, and performs switching to the signal analysis and time synchronization unit 250. [

11 is a flowchart illustrating a time synchronization process in a base station control method according to an embodiment of the present invention.

As shown in FIG. 11, in step S501, the signal analysis and time synchronization unit 250 confirms whether or not the reception mode is switched from the GNSS antenna to the reception mode.

In step S502, the signal analysis and time synchronization unit 250 reports the state change of the main controller 270. [

12 and 13 are diagrams for explaining the operation of the maritime control center 11 when a failure occurs in the land network when the base station communication system 20 is connected to the maritime control center 11 or the land operating center 12 via a land network, A base station control method of providing AIS data and ASM data for maritime traffic and safety purposes to the maritime control center 11 or the land operation center 12 via VDE communication through relay communication with the land operation center 12 have. Hereinafter, the base station control method will be described with reference to FIGS. 12 and 13. FIG.

12 is a flowchart illustrating a process of relaying AIS and ASM data to a VDE when a terrestrial communication network failure occurs in a base station control method according to an embodiment of the present invention.

As shown in FIG. 12, in step S601, the main controller 270 of the base station control device 200 confirms a land communication state.

In step S602, the main controller 270 checks whether an abnormality occurs in the land communication state. The main controller 270 can periodically check the terrestrial communication status to check whether or not an error has occurred.

In step S603, the main controller 270 receives the AIS data and the ASM data, and stores the received AIS data and the ASM data in a queue of the provided memory when the above-described confirmation result (S602) The main controller 270 stores the AIS data and the ASM data in a memory, which is an internal storage, when an abnormality or a failure occurs in the land communication state. On the other hand, if it is determined in step S602 that there is no abnormality in the terrestrial communication state, the main controller 270 performs step S602 to check whether an abnormality occurs in the terrestrial communication state.

In step S604, the main controller 270 transmits a terrestrial network fault occurrence message to the maritime control center 11 (VTS) or the land operation center 12 using the VDE transceiver. The main controller 270 transmits a terrestrial network fault occurrence message to the VTS center or the land operation center 12 by using the VDE transceiver to encode an abnormality in the terrestrial network communication status as an alarm message.

In step S605, the main controller 270 uses the VDE transceiver to broadcast land station slot reservation information to a nearby ship or a neighboring base station. In addition, the main controller 270 can broadcast the land station slot reservation information using the VDE transceiver to the ship of the surrounding service area. Through this, a specific time slot section is converted into a reserved slot for relay.

FIG. 13 is a flowchart illustrating a process of relaying AIS and ASM data to a VDE when a failure occurs in a land-based communication network in a BS control method according to an exemplary embodiment of the present invention.

In step S701, the main controller 270 of the base station control apparatus 200 encodes the AIS data and AMS data stored in the queue into VDE transmission data. The main controller 270 encodes the AIS data and the ASM data stored in the queue using the reserved slot for VDE transmission.

In step S702, the main controller 270 transmits the encoded VDE transmission data to the VDE transceiver.

Then, in step S703, the main controller 270 confirms whether the AIS and ASM information has been received from the VTS center or the land operation center 12.

In step S704, the main controller 270 confirms the land communication state again. The main controller 270 can transmit once more if the reception is not confirmed.

In step S705, the main controller 270 confirms whether or not abnormalities still occur in the land communication. As a result of the check (S705), if there is no abnormality in the land communication, the main controller 270 ends the process of relaying the AIS and ASM data to the VDE. On the other hand, the main controller 270 periodically checks the terrestrial network communication status and can continuously transmit AIS data and ASM data stored in the queue through the terrestrial network when an error occurs. That is, the main controller 270 repeats the step S701 to encode the AIS data and the AMS data into the VDE transmission data if there is a further abnormality in the terrestrial communication.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions as defined by the following claims It will be understood that various modifications and changes may be made thereto without departing from the spirit and scope of the invention.

10, 20: base station communication system
100, 200; Base station control device
110, 120: a first AIS transceiver, a second AIS transceiver
130, 140: a first ASM transceiver, a second ASM transceiver
150, 160: a first VDE transceiver, a second VDE transceiver
111, 121, 131, 141, 151, and 161: VHF antennas
112, 122, 132, 142, 152, 162: GNSS antenna
11: Maritime Control Center
12: Athletics Operations Center
201 to 204: Single reception antenna and plural transmission / reception antennas
205: GNSS antenna
210: Input /
220:
230: I / O controller
240: GNSS signal distributor
250: Signal analysis and time synchronization unit
260: Land communication department
270: Main controller
280: Uninterruptible power supply auxiliary
290; Rack fan
221, 222: first switch, second switch
223:
241: GNSS signal distributor
242, 243: a first GNSS signal amplifier, a second GNSS signal amplifier,
244: GNSS signal switching controller
251: Time signal generator
252: GNSS signal generator
253; Time synchronization controller

Claims (20)

A base station control apparatus in a VHF Data Exchange System,
An input / output communication unit for exchanging data with a plurality of transceivers;
A switching unit connecting a plurality of transmitting and receiving antennas and a single receiving antenna to each of the plurality of transmitting and receiving devices through switching;
An input / output controller for controlling switching in the switching unit;
A maritime traffic control center or an onshore communication center that communicates with the land operation center through a land network; And
And a main controller for controlling and operating the base station control device and dividing the plurality of transmission / reception devices into a first transmission / reception device and a second transmission / reception device, respectively, for operating in a transmission mode and a reception mode,
The switching unit includes:
A first switch for connecting the first transceiver and the plurality of transmission / reception antennas so that the first transceiver operates in a transmission mode;
A second switch connected to the first switch and connecting the second transceiver and the single receive antenna so that the second transceiver operates in a receive mode; And
And a switching control unit for controlling the first switch and the second switch and switching communication modes of the plurality of transmitting and receiving apparatuses. delete The method according to claim 1,
Wherein the switching control unit comprises:
Wherein the first transceiver is connected to the first transceiver and the second transceiver is connected to the first transceiver and the second transceiver is connected to the second transceiver, Wherein the plurality of transmission / reception antennas are connected to the plurality of transmission / reception antennas via switches. The method according to claim 1,
Wherein the switching controller releases the connection with the second transceiver and the single receiving antenna when the second transceiver is out of order,
And the main controller operates the first transceiver in a transmission / reception mode. The method according to claim 1,
A GNSS signal distribution unit for distributing a GNSS signal received from a single Global Navigation Satellite System (GNSS) antenna; And
And a signal analysis and time synchronization unit for analyzing the distributed GNSS signal to convert it into time synchronization information and providing the converted time synchronization information to the plurality of transceivers. 6. The method of claim 5,
Wherein the signal analysis and time synchronization unit comprises:
A base station control unit in a maritime microwave data interchange system for generating a GNSS generation signal using time synchronization information when a failure of the GNSS antenna occurs and converting the GNSS generation signal into time synchronization information and providing the time synchronization information to the plurality of transmission / . 6. The method of claim 5,
Wherein the signal analysis and time synchronization unit comprises:
A time signal generator for generating a time signal using time synchronization information when a failure of the GNSS antenna occurs;
A GNSS signal generator for generating a GNSS generation signal using the generated time signal; And
And a time synchronization controller for controlling the time signal generator and the GNSS signal generator to convert the GNSS generation signal into time synchronization information and providing the time synchronization information to the plurality of transceivers. The method according to claim 1,
The plurality of transceivers include an AIS (Automatic Identification System) transceiver, an ASM (Application Specific Message) transceiver, and a VDE (VHF Digital Exchange) transceiver,
Wherein the main controller transmits a terrestrial network fault message to the maritime traffic control center or the onshore operation center using the VDE transceiver when an abnormality occurs in the terrestrial network communication, . 9. The method of claim 8,
The main controller includes:
The AIS data or the ASM data is stored in the memory, and the AIS data or the ASM data is encoded into the VDE data to transmit the AIS data or the ASM data through the VDE transceiver, Base station control device in a maritime microwave data exchange system transmitted to a control center or the land operation center. 10. The method of claim 9,
The main controller includes:
Broadcasts the AIS data or ASM data to the VDE transceiver through the VSS transceiver, and transmits the AIS data or ASM data to the VDE And transmits the data to the maritime traffic control center or the onshore operation center through a transceiver. A base station control method performed by a base station control apparatus in a maritime microwave data exchange system,
Exchanging data with a plurality of transceivers;
A plurality of transmitting and receiving antennas and a single receiving antenna are connected to the plurality of transmitting and receiving devices through switching; And
Comprising the steps of communicating with a maritime traffic control center or a land operation center via a land network,
Wherein the step of connecting through the switching respectively comprises dividing the plurality of transmitting and receiving devices into a first transmitting and receiving device and a second transmitting and receiving device and operating them in a transmission mode and a receiving mode,
Connecting the first transceiver and the plurality of transceivers so that the first transceiver operates in a transmission mode;
Connecting the second transceiver and the single receive antenna so that the second transceiver operates in a receive mode; And
And switching communication modes of the plurality of transceivers. delete 12. The method of claim 11,
Wherein the switching of the communication modes of the plurality of transceivers comprises:
Wherein the second transceiver switches the connection of the second transceiver and the single reception antenna so that the second transceiver operates in the transmission / reception mode if the first transceiver is out of order, and connects the second transceiver to the plurality of transceivers A base station control method. 12. The method of claim 11,
Wherein the switching of the communication modes of the plurality of transceivers comprises:
And disconnects the second transceiver from the single reception antenna and operates the first transceiver in a transmission / reception mode if the second transceiver is out of order. 12. The method of claim 11,
Distributing a GNSS signal received from a single Global Navigation Satellite System (GNSS) antenna; And
Analyzing the distributed GNSS signal to convert it into time synchronization information, and providing the converted time synchronization information to the plurality of transceivers. 16. The method of claim 15,
Generating a GNSS generation signal using time synchronization information when a failure occurs in the GNSS antenna and converting the GNSS generation signal into time synchronization information and providing the time synchronization information to the plurality of transceivers. 16. The method of claim 15,
Generating a time signal using time synchronization information when a failure of the GNSS antenna occurs;
Generating a GNSS generation signal using the generated time signal; And
And converting the GNSS generation signal into time synchronization information and providing the time synchronization information to the plurality of transceivers. 12. The method of claim 11,
The plurality of transceivers include an AIS (Automatic Identification System) transceiver, an ASM (Application Specific Message) transceiver, and a VDE (VHF Digital Exchange) transceiver,
Further comprising transmitting the terrestrial network fault message to the maritime traffic control center or the onshore operation center using the VDE transceiver when an abnormality occurs in the terrestrial network communication. 19. The method of claim 18,
Storing the received AIS data or ASM data in a memory provided; And
Encoding the stored AIS data or ASM data into VDE data and transmitting the encoded AIS data or ASM data to the maritime traffic control center or the land operation center through the VDE transceiver. 20. The method of claim 19,
Broadcasting the land station slot reservation information for transmitting the stored AIS data or ASM data through the VDE transceiver,
And transmitting the stored AIS data or ASM data to the maritime traffic control center or the land operation center through the VDE transceiver using the reserved slots reserved according to the land station slot reservation information, Or to the onshore operation center.

Images