KR20120069030A - Unmanned station system using dsc/vhf and analog/digital - Google Patents

Abstract

PURPOSE: An integrate analog and digital-based digital selective calling(DSC)/very high frequency(VHF) unmanned relay system is provided to save costs required for installing and operating remote equipment and to reduce the occurrence of communication problems. CONSTITUTION: A sea ship station(10) includes an analog transceiver implementing wireless communications based on an analog radio frequency(RF) signals. A first relay station(20) receives and converts the analog RF signals into digital RF signals and transmits the digital RF signals. The first relay station converts the digital RF signals into analog RF signals to be transmitted to the sea ship station. A second relay station(30) wirelessly transmits and receives the digital RF signals with the first relay station. A portable terminal(40) wirelessly transmits and receives the digital RF signals with the second relay station.

Description

DS / BH unmanned relay station system which combined analog and digital {UNMANNED STATION SYSTEM USING DSC / VHF AND ANALOG / DIGITAL}

The present invention relates to a DS / VHF unmanned relay station system that combines analog and digital, it is not necessary to install remote equipment in the coast station, can increase the work efficiency through simple equipment installation and operation In the same way as before, communication between the maritime ship station and the coastal relay station is carried out by analogue method. DS / BH unmanned relay station system that combines analog and digital to enable smooth data communication and to remove data interference caused by crosstalk of frequencies by transmitting data at different frequencies when sending data from each part. It is about.

Despite the endless efforts of related agencies and a large budget to prevent various accidents, marine accidents are becoming larger and more diversified each day.

In order to cope with this reality more efficiently, information technology is constantly developing.

For more telecommunications, coastal station equipment is installed in the highlands and island areas using remote equipment, but in terms of operation, the dedicated line and additional equipment must be used together. It is not an economic problem because the expenses are continuously generated and there is no economic feasibility, and the structure of the equipment is complicated.

In addition, the conventional coast station equipment is a whole circuit is made of an analog system to transmit and receive signals. Accordingly, in the prior art, obstacles that may occur in emergency communication exist due to crosstalk introduced from the environment due to the characteristics of analog. Therefore, in the prior art, maritime accidents due to communication failure are often prevented. In addition, there was a problem that the efficiency of the device is low in the analog signal transmission.

In the prior art, since there is only one channel capable of transmitting and receiving at the maritime ship station, and the coast relay station transmitting and receiving the signal with the maritime ship station also operates one channel for the corresponding ship station, each channel is in communication or a failure occurs. There was a problem that timely communication was impossible.

Therefore, the present invention is to improve the problems of the prior art as described above, an object of the present invention is to provide a DS / VH unmanned relay station system that combines analog and digital that do not require remote equipment installation in the coast station.

Another object of the present invention is to provide a DS / VH unmanned relay station system that combines analog and digital that can increase the work efficiency through simple equipment installation and operation.

Still another object of the present invention is to communicate by analogue method between a marine ship station and a coastal relay station in the same way as in the past, but the DS / VH unmanned incorporating analog and digital to transmit and receive the digitally converted signal from the coastal relay station It is to provide a relay station system.

It is still another object of the present invention to provide a DS / BH unmanned relay station system in which analog and digital are combined to enable fast and smooth data communication by providing a communication line between a marine vessel station and a coastal relay station in multiple channels.

It is still another object of the present invention to provide a DS / BH unmanned relay station system that combines analog and digital, which can eliminate data interference caused by crosstalk of frequencies by transmitting data at different frequencies when transmitting data from each part. It is.

In order to solve the above problems, the present invention relates to a DS / BH unmanned relay station system that combines analog and digital, the marine vessel station having an analog transceiver for wireless communication with analog RF signals; A first relay station for receiving an analog RF signal from the marine vessel station, converting the digital RF signal into a digital RF signal, and transmitting the analog RF signal to an analog RF signal for transmission to the marine vessel station; A second relay station for wirelessly transmitting and receiving a digital RF signal with the first relay station; And a portable terminal wirelessly transmitting and receiving a digital RF signal to and from the second relay station, wherein the first relay station and the second relay station change and transmit the frequency of the received signal.

According to the present invention, there is no need to install the remote equipment in the coast station, thereby reducing the cost of installing and operating the remote equipment, and also reducing the communication failure caused by the failure.

According to the present invention, there is an effect that can increase the work efficiency through easy installation and operation.

According to the present invention, the marine ship station and the coastal relay station can communicate in an analog manner as in the prior art, and can transmit and receive digitally converted signals from the coastal relay station to improve the accuracy and reliability of the transmitted and received data. .

According to the present invention, by providing a communication line between the marine vessel station and the coastal relay station in multiple channels, it is possible to quickly and smoothly communicate data to prevent various marine accidents.

According to the present invention, there is an advantage that can eliminate the communication obstacles caused by crosstalk of the frequency by transmitting data at different frequencies during data transmission in each unit.

Figure 1 is a block diagram showing the concept of the DS / BC unmanned relay station system incorporating analog and digital according to the present invention.
2 is a configuration diagram showing a specific configuration of the first relay station and the second relay station.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and examples.

Figure 1 is a block diagram showing the concept of the DS / BC unmanned relay station system incorporating analog and digital according to the present invention.

As shown, in the present invention, the marine vessel station 10, the first relay station 20, the second relay station 30 and the portable terminal 40. The maritime vessel station 10 is installed on a vessel operating or operating in the sea, the first relay station 20 is installed in the high or island area for transmitting and receiving data with the maritime vessel station 10, the second The relay station 30 serves as a relay for exchanging data with the first relay station 20, for example, as a port office. The portable terminal 40 is, for example, a situation room portable terminal 40, which transmits and receives information to and from each vessel through the second relay station 30 while overseeing information on a vessel at sea in a jurisdiction and weather information at sea. It is a structure for doing so.

Here, the maritime vessel station 10 and the first relay station 20 transmits and receives data through an analog RF signal. In addition, the first relay station 20 converts the analog RF signal received from the marine vessel station 10 into a digital RF signal and transmits it to the second relay station 30 or transmits the digital RF signal received from the second relay station 30. The signal is converted into an analog RF signal and transmitted to the marine vessel station 10. Thereafter, a signal is transmitted and received digitally between the second relay station 30 and the portable terminal 40.

In addition, the maritime shipping station 10, the first relay station 20, the second relay station 30 and the portable terminal 40 each has four channels, and transmits and receives data at different frequencies. Therefore, a phenomenon in which data transmitted from each component causes confusion with data received by the corresponding component can be prevented.

In addition, since the four channels are not fixed to each other but can be changed, transmission and reception of data through other channels is possible even if one channel is used.

Next, a specific configuration of the first relay station 20 and the second relay station 30 will be described with reference to FIG. 2.

The basic configurations of the first relay station 20 and the second relay station 30 include receivers 110 and 110 ', transmitters 120 and 120', modulation and demodulation units 130 and 130 ', receive signal amplifiers 111 and 111' and transmit signal amplifiers ( 121,121 ').

The receivers 110 and 110 'receive the radio frequency signals and tone codes having the same frequency as those set by the central controllers 140 and 140' through the antennas 180 and 180 '.

The transmitters 120 and 120 'transmit the radio frequency signals received from the modulation and demodulation units 130 and 130' to the outside through the antennas 180 and 180 'together with the tone codes.

The modulators 130 and 130 'send the audio signals obtained by demodulating the radio frequency signals received by the receivers 110 and 110' to the received signal amplifiers 111 and 111 ', and the voice signals input from the transmission signal amplifiers 121 and 121'. Transmits the radio frequency signal obtained by modulating the signal to the transmitters 120 and 120 '.

In addition, the reception signal amplifiers 111 and 111 'amplify the voice signals received from the receivers 110 and 110', and output the amplified voice signals to the built-in speakers 170 and 170 '. When the microphone jack 1211 'terminal of the other radio 100' is electrically connected to the first radio 1111, the amplified voice signal is transmitted to the transmission signal amplifier 121 'of the other radio 100'.

In addition, the transmission signal amplifier 111 amplifies a voice signal input from the built-in microphone 170 and transmits it to the modulation and demodulation unit 130, but is set in the repeater mode and the other radio 100 is connected to the microphone jack terminal 1211. Speaker terminal 1111 'is electrically connected to amplified voice signal transmitted from the reception signal amplifier 111' of the other radio 100 'and transmitted to the demodulator 130'. .

Here, the central controllers 140 and 140 'may be set by the user so that the radios 100 and 100' are not operated when the tone codes received by the receivers 110 and 110 'are different from the tone codes preset therein. Can be.

In addition, the central controllers 140 and 140 'may transmit / receive at a frequency of a corresponding channel when a user selects a specific channel among a plurality of transmit / receive channels through a manipulation of an external key button among a plurality of preset transmit / receive channels and a single repeater channel. It is set to the transmission and reception mode, and when the user selects a repeater channel to be set to the repeater mode.

Here, when the radio frequency signal received by one of the two radios (100,100 ') connected to the other radio from the outside, the repeater is in operation on the LCD display through the LCD display 150,150' Done. Therefore, it is possible to easily check the transmission and reception state of the radio.

In addition, the receivers 110 and 110 'transmit a de-emphasis to the modulated demodulators 130 and 130'.

Here, DE-emphasis is used to reduce the relative strength of the high frequency component to restore the signal level to its original state in order to eliminate the pre-emphasis effect of emphasizing the high frequency component before reproducing the audio signal. Say that.

The transmitters 120 and 120 'pre-emphasis the radio frequency signals received from the modulation and demodulators 130 and 130' and transmit them to the outside through an antenna.

Here, pre-emphasis is a pre-emphasis of a portion of the transmission frequency in advance to improve the signal-to-noise ratio (S / N), frequency characteristics, and distortion characteristics. In frequency modulation, noise is modulated. Since the frequency increases as the frequency increases, the high frequency of the modulated signal is emphasized with a constant time constant in advance, and the receiving side weakens the high frequency with the same time constant. In this way, the noise component of the transmission system is separated and reduced by de-emphasis while keeping the overall amplitude frequency characteristic flat.

In addition, the first relay station 20 receives an analog RF signal from the maritime vessel station 10 and converts it into an analog RF signal for converting the digital RF signal into a digital RF signal and converts the analog RF signal to the maritime vessel station 10 And further comprising a digital-to-analog converter for transmitting.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

10: Marine ship station 20: First relay station
30: second relay station 40: portable terminal

Claims (1)

A marine vessel station having an analog transceiver for wireless communication with an analog RF signal;
A first relay station for receiving an analog RF signal from the marine vessel station, converting the digital RF signal into a digital RF signal, and transmitting the analog RF signal to an analog RF signal for transmission to the marine vessel station;
A second relay station for wirelessly transmitting and receiving a digital RF signal with the first relay station; And
And a portable terminal wirelessly transmitting and receiving a digital RF signal to and from the second relay station.
And the first relay station and the second relay station change the frequency of the received signal and transmit the same.

Images