KR20200060093A - WIRELESS COMMUNICATION RELAY SYSTEM FOR SINGLE FREQUENCY SINGLE CALL COMMUNICATION BASED ON RoIP - Google Patents

Abstract

The present invention relates to a wireless communication relay system for single-frequency simplex communication based on RoIP. More particularly, the present invention is to provide a wireless communication relay system for single-frequency simplex communication based on RoIP which allows to provide a wireless relay device for single-frequency simplex communication that provides a bidirectional simplex communication service using one frequency on the RoIP basis, a digital communication interworking technology.

Description

Wireless communication relay system for single frequency single communication based on RoIP {WIRELESS COMMUNICATION RELAY SYSTEM FOR SINGLE FREQUENCY SINGLE CALL COMMUNICATION BASED ON RoIP}

The present invention relates to a wireless communication relay system for single-frequency single-frequency communication based on RoIP. In more detail, for single-frequency single-frequency communication based on RoIP, a wireless relay device for single-frequency single-speed communication providing a two-way single-speed communication service using one frequency can be provided based on RoIP, a digital communication interworking technology. It is to provide a wireless communication relay system.

A single frequency communication system represented by a frequency shared radio communication system (TRS) is a single message transmission system that provides a two-way communication service using one frequency. The short term means transmitting only one message, or transmitting a single block or a single information message within the same information transmission step in a basic data transmission procedure.

In contrast, the duplex communication method is two-way communication using two communication lines, and when a duplex method is applied to wireless communication, two frequencies are required.

Since a communication system such as TRS uses a single frequency, it is necessary to distinguish between a transmission signal and a reception signal in time, and therefore, one communication line is used instead of two communication lines. For example, if the subjects in communication make an appointment with each other and the sender transmits a message to send a message (for example, 'OVER') by voice, the receiver recognizes the voice ('OVER') and then Switch to transmission. After switching to the sender, after transmitting the message, the promised signal ('OVER') is transmitted by voice to communicate between the senders and receivers.

TRS can be used for various purposes such as amateur radio networks used by individuals, corporate networks operated by taxi associations, public networks used by state-owned enterprises, fire networks used by police or fire control agencies, and emergency networks in buildings established for use in disasters. It is applied in the field. Among them, the emergency network is a network that must be installed in order to be inspected for the completion of the building.

As described above, TRS is widely applied around life, but compared to its effectiveness, the equipment and technologies that make up the network have not developed significantly. In particular, the relay system has been rarely developed, and the representative reason is that the TRS is a single communication system.

As described above, in the single frequency communication system, since the transmission frequency and the reception frequency are the same, a self-oscillation phenomenon occurs in which the output signal is returned to the input. Accordingly, the signal output from the transmitting end is fed back to the receiving end, the receiving end is fed back to amplify the returned signal, and the transmitting end generates an endless feedback loop that transmits the amplified signal again, making it difficult to develop a relay system. Will follow.

To solve this, it is possible to consider a relay system that secures a physical distance, that is, the isolation of the transmitting antenna and the receiving antenna. In such a relay system, the gain of the repeater is determined by the isolation between the transmit and receive antennas.

Therefore, it is difficult to secure a high repeater gain, and repeater self-oscillation may occur due to environmental and position changes.

In addition, since the possibility of installation of equipment is determined according to the installation location, there are limitations in installation and operation.

In order to overcome this limitation, a method of using a plurality of low-gain repeaters may be considered. In this method, a low-gain repeater is used in which the gain of the transmission-side driver and the reception-side driver is less than a specified value (for example, 15) and a system isolation is less than a specified value (for example, 10). However, a large number of repeaters must be installed in order to obtain a high gain or a large service area. In addition, the isolation level inside the repeater is low, causing the communication quality to deteriorate due to the self-feedback signal, and the service quality deteriorates.

Another limitation that makes it difficult to develop a repeater in a single-frequency communication system such as TRS is that the time-division short-distance method is used.

In a single frequency communication system, frequency isolation is secured in time using a time division short-division method. Therefore, it is very important to detect the time-division synchronous signal. Compared to a bidirectional communication system using a time-division duplex method, time-division synchronous signal detection is not systematically defined in a single-frequency short-distance communication system, and is based only on the promises between transmitting and receiving users. Therefore, it is difficult to detect the synchronization signal in the relay system because the time-division synchronization signal is classified.

Mobile communication services have been making remarkable developments in recent years, such as wideband code division multiple access (WCDMA) services. In particular, as the development of the main system, the base station and the relay system, the repeater, is systematically and planned, the service coverage using the repeater is expanding rather than the base station service coverage. Development of various repeaters used in communication methods such as WCDMA, for example, RF repeaters, optical repeaters, variable repeaters, digital repeaters, ICS (Interference Cancellation Repeater) repeaters, DPD (Digital Pre-Distortion) repeaters, etc. It gave the best service effect to everyone with minimum investment cost.

On the other hand, the single frequency communication service is difficult to develop a relay system due to the above-mentioned problems, and the developed relay system is also in the initial stage. Accordingly, an increase in installation costs, an increase in operating costs, and a decrease in service quality are occurring. Accordingly, there is an urgent need to provide a single-frequency short-term communication service and a quality of service equivalent to a two-way mobile communication service.

On the other hand, in the case of a commercial radio, a frequency of an ultra-high frequency (VHF) or an ultra-high frequency (UHF) is paid for a certain amount, and the radio communication distance is formed within 10 km to 20 km. However, the cost is lower than that of a mobile phone. In addition, these walkie-talkie and business walkie-talkies (hereinafter referred to as "portable walkie-talkie") have a smaller time difference between the time when the call is made by the sender and the time when the call is received by the receiver. That is, without needing time to connect a call and ring a ring like a mobile phone, for example, if a user presses a portable walkie talkie PTT on the calling side to speak, the portable walkie talkie speaker on the receiving end hears the caller's voice within a short time. As described above, the portable radio has a growing population due to its advantages such as low cost and ease of use, and it is very useful when a PTT is transmitted and the corresponding radio is heard immediately at the receiving radio. However, in the case of radios used by fire departments, police stations, military units, etc., there is no communication compatibility between each other because they use a specific frequency band or a specific channel, so disasters or emergency rescue activities occur, and several agencies gather and work in specific places. The problem is that command, control, and communication are not systematic.

An object of the present invention is to provide a wireless relay device and method for single frequency communication that can easily synchronize synchronization between a transmitting end and a receiving side. In particular, by implementing the RoIP-based gateway software, the above-described problems can be more smoothly solved.

In the present invention, by providing a RoIP-based gateway, it is possible to overcome the limitation of a call distance, which was pointed out as a disadvantage of a portable radio, and provides a wireless relay system for a single frequency communication that can eliminate self-oscillation while minimizing system isolation. Having

In order to achieve the above object, a wireless communication relay system for single-frequency single-frequency communication based on RoIP according to an embodiment of the present invention includes a first control unit and a second control unit, and the first control unit detects a transmission signal. Transmission signal detection module; A network module that performs a communication function with the network network; A first audio input module that receives an audio input from the first radio; A first radio signal output module for outputting a radio signal to the first radio; A first audio output module for outputting audio data to the first radio; By determining the data received through the network module, data generated in the first channel is transferred to the first audio output module and the first radio signal output module, and data generated in the second channel is transferred to the second control unit And, the audio data received from the first audio input module is transmitted to the first channel through the network module, and the audio data received from the second control unit is transmitted to the second channel through the network module. A patch control module including a module, a patch control module receiving the patch setting information input from an input unit, and patch setting information stored in the patch control module after receiving digital audio information transmitted from any one of the n RoIP modules. After referring to the information of the channel port stored in the patch setting information, it may be provided with a voice control module that transmits the digital audio signal to a RoIP module interworking with the corresponding channel port.

The receiving radio may be configured to transmit a receiving end message to the RoIP server of the receiving side upon receiving a communication end detection code from the transmitting radio.

In the wireless communication relay system for the single-frequency single-frequency communication based on RoIP, the transmission signal detection module further includes a remote that turns on a transmission path and turns off a reception path when a transmission signal is transmitted. It may be.

The remote may be a single-frequency short-distance communication that turns off the transmission path in a standby state while maintaining the reception path on (ON).

The remote may be a plurality of remotely connected in series.

Hereinafter, the present invention will be described in more detail.

A wireless communication relay system for single-frequency single-frequency communication based on RoIP according to an embodiment of the present invention includes a first control unit and a second control unit, and the first control unit includes: a transmission signal detection module for detecting a transmission signal; A network module that performs a communication function with the network network; A first audio input module that receives an audio input from the first radio; A first radio signal output module for outputting a radio signal to the first radio; A first audio output module for outputting audio data to the first radio; By determining the data received through the network module, data generated in the first channel is transferred to the first audio output module and the first radio signal output module, and data generated in the second channel is transferred to the second control unit And, the audio data received from the first audio input module is transmitted to the first channel through the network module, and the audio data received from the second control unit is transmitted to the second channel through the network module. A patch control module including a module, a patch control module receiving the patch setting information input from an input unit, and patch setting information stored in the patch control module after receiving digital audio information transmitted from any one of the n RoIP modules. After referring to the information of the channel port stored in the patch setting information, it may be provided with a voice control module that transmits the digital audio signal to a RoIP module interworking with the corresponding channel port.

In a multi-directional network system using the RoIP gateway, the receiving radio may be configured to transmit a receiving end message to the receiving RoIP server when receiving a communication termination detection code from the transmitting radio.

At this time, the wireless data signal is characterized in that the data signal in accordance with the wireless RS-232C communication protocol.

On the other hand, when receiving the pilot tone signal from the transmitting radio, the receiving radio is characterized in that it transmits a start message to the receiving side RoIP server.

In this case, when the receiving RoIP server receives the receiving start message from the receiving RoIP server, the transmitting RoIP server is characterized in that it transmits the transmitting start message to the transmitting radio.

In addition, the receiving radio is characterized in that when receiving the communication termination detection code from the transmitting radio, the receiving end message is transmitted to the receiving RoIP server.

At this time, the RoIP server of the transmitting side is characterized in that when receiving the receiving end message from the receiving RoIP server, the transmitting end message is transmitted to the transmitting radio.

On the other hand, the transmission-side RoIP server is characterized in that it transmits any one message selected from the channel change message, the signal sensitivity level change message, the transmission power change message to the transmission radio.

In order to achieve the above object, a method according to the present invention comprises: converting a voice signal input through a microphone in a transmitting radio into a wireless data signal and transmitting it to a wireless space through an antenna; Converting wireless data transmitted from the transmitting radio into TCP / IP Internet data in a transmitting RoIP server; Transmitting the Internet data converted by the transmitting-side RoIP server to the receiving-side RoIP server through an Internet network; Receiving the Internet data at a receiving side RoIP and converting it into a wireless data signal for output; And receiving a wireless data signal output from the RoIP server on the receiving side at a receiving radio, and converting the received wireless data signal into a voice signal and outputting it to a speaker.

In this case, the method may include transmitting a pilot tone signal to a receiving radio by pressing a PTT button on the transmitting radio; Transmitting a reception start message from the reception radio to the reception side RoIP server; And transmitting the transmission start message from the transmission RoIP server to the transmission radio as the reception start message is received by the reception RoIP server.

In addition, the method includes, as the PTT button is released by the transmitting radio, transmitting a communication termination code to the receiving radio; Transmitting a reception end message from the reception radio to the reception side RoIP server; And transmitting the transmission end message from the RoIP server of the transmission to the transmission radio as the reception end message is received from the RoIP server of the reception side.

On the other hand, the transmitting-side RoIP server is characterized in that it transmits any one message selected from the channel change message, the signal sensitivity level change message, the transmission power change message to the transmission radio.

According to the wireless communication relay system for single-frequency single-frequency communication based on RoIP of the present invention, a single-frequency communication that can easily synchronize synchronization between a transmitting end and a receiving end can be provided. In particular, the above-described problem can be solved by implementing the RoIP-based gateway software.

According to the wireless communication relay system for single-frequency single-frequency communication based on the RoIP of the present invention, it is possible to overcome the limitation of the call distance, which was pointed out as a disadvantage of the portable radio, and can minimize the system isolation and eliminate self-oscillation. .

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art to which the present invention pertains can easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

The input unit of the present invention is composed of a keypad having an m X n matrix structure, m represents the number of groups, n represents the number of channel ports, and m and n are natural numbers of at least 2 or more.

2, the configuration of the gateway of the present invention includes an input unit, a control unit, a plurality of RoIP modules 1 to 8, and a plurality of channel ports (CH1 to CH8). The input unit of the present invention includes channel port information (CH1 to CH8) and group information (Group1 to Group4).

Channel port information is indicated by CH1 to CH8, but this is an embodiment and can be expanded as needed. Here, the channel port information CH1 to CH8 indicates channel ports (CH1 to CH8) interlocked with RoIP modules 1 to 8 to which different radios are connected.

Then, the group information indicates information of channel ports that are grouped together and capable of mutual communication.

The two channel ports CH1 and CH2 of the present invention are classified as group 1, the two channel ports CH3 and CH4 are classified as group 2, and the four channel ports CH5 to CH8 are classified as group 3. Accordingly, when grouped as described above by the input unit, the radio group connected to the channel port 1 and the radio group connected to the channel port 2 can communicate with each other.

Similarly, the radio group connected to the channel port 3 and the radio group connected to the channel port 4 can communicate with each other, and mutual communication between radio groups connected to the channel ports 5 to 8 is possible. .

For reference, in the present specification, a state in which different channel ports are interconnected as described above is referred to as a patch or patch state.

On the other hand, the gateway of the present invention may perform the same function as above through input of a computer or the like other than the input unit.

Next, the control unit of the present invention includes a patch control module and a voice control module as shown. The patch control module performs a function of storing channel port patch (connection) status information input by a user through an input unit or a computer and providing a reference control module for reference. Patch setting through a computer is also in the existing case, and thus, the input unit newly proposed in the present invention will be mainly described.

The operation process of the patch control module according to the present invention is as follows.

First, when patch setting information is input to the patch control module through the input unit, the patch control module determines whether the input patch setting information exists.

If there is no previously set patch information, the patch information is stored according to the input patch setting information.

If there is previously set patch setting information, the existing patch setting information is deleted and the newly entered patch setting information is saved. For example, when CH1 and CH2 are set in group 1 through the input unit, the patch control module has different groups of CH1 and CH2.

For example, it is determined whether or not it belongs to group 2 or group 3, and if it belongs to another group, it is replaced. Otherwise, the input patch setting information, that is, information to set CH1 and CH2 in group 1, is displayed. Save as is. Next, the voice control module checks whether or not the audio input of the radio connected to each channel port (channel ports 1 to 8) is detected, and if the audio input is detected, checks whether the channel port is patched through the patch control module, If the corresponding channel is in a patched state, check if another channel in the corresponding group is already speaking, and if speaking is possible, audio is transmitted to all channels in the patched group.

Next, a description will be given of a plurality of RoIP modules, which are other components of the present invention, and a plurality of channel ports linked thereto.

In the embodiment of the present invention, 8 RoIP modules and 8 channel ports (channel ports 1 to 8) interworking with each of them are provided, but the number of RoIP modules and chat port may be expandable as needed.

A predetermined radio is connected to the channel port of the present invention, and a PTT terminal, an audio output terminal, an audio terminal, and a Carrier Operated Relay (COR) terminal are provided in the channel port.

The radio connected to the channel port usually includes a PTT terminal, an audio output terminal, and an audio terminal, but there may or may not be a COR terminal in the radio. In consideration of this, the present invention additionally provides a COR terminal to the channel port to expand the versatility of the gateway, which may be an optional element.

For reference, in the case of a radio that does not provide a COR terminal, it is determined whether to input a voice by analyzing an audio input signal.

Next, a plurality of RoIP modules are interlocked with channel ports 1 to 8 corresponding to each.

The RoIP module of the present invention is connected to a radio connected to a corresponding channel port through an audio input / output terminal, a PTT terminal, and a COR terminal, and a VoIP-related protocol stack such as SIP and RTP, and a voice codec are embedded to connect each other to the radio patch. It plays a role of enabling voice communication between groups.

Hereinafter, the functional operation of the "Internet-based walkie-talkie gateway that enables communication between heterogeneous walkie-talkie groups by interconnecting different n walkie-talkie groups" proposed by the present invention will be described.

For convenience of explanation, it is assumed that there are three groups. Assuming that group A represents the group with radios used by firefighters, group B represents the group with radios used by police officers, and group C is group A with radios used by soldiers. Groups belonging to each other can only talk within Group A through their own radios, and group B belongs to Group B only through their own radios, and group C belongs to each group You will only be able to talk within Group C through your radio.

However, when disasters or emergencies occur in a specific area and groups A, B, and C all participate, it is often necessary to talk to each other.

In this case, after installing the gateway of the present invention shown in Fig. 2, predetermined radios used in each of the groups A, B, and C are connected to any channel port of the eight channel ports, respectively.

When using an internet-based walkie-talkie gateway that enables calls between heterogeneous walkie-talkie groups by interconnecting different n walkie-talkie groups according to the present invention described so far, it is possible to configure a single communication network in an emergency on-site rescue team or military unit coalition operation. In addition, by using an IP network network, it is possible to establish a wireless communication network without limitation of place or distance, and it is possible to easily perform a group setting in which a single communication is possible by operating an input unit attached to the gateway.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (5)

It includes a first control unit and a second control unit,
The first control unit includes: a transmission signal detection module that detects a transmission signal;
A network module that performs a communication function with the network network;
A first audio input module that receives an audio input from the first radio;
A first radio signal output module for outputting a radio signal to the first radio;
A first audio output module for outputting audio data to the first radio;
By determining the data received through the network module, data generated in the first channel is transferred to the first audio output module and the first radio signal output module, and data generated in the second channel is transferred to the second control unit And, the audio data received from the first audio input module is transmitted to the first channel through the network module, and the audio data received from the second control unit is transferred to the second channel through the network module. A patch control module including a module and receiving the patch setting information input from an input unit,
After receiving digital audio information transmitted from any one of the n RoIP modules, referring to patch setting information stored in the patch control module, check the channel port information stored in the patch setting information, and then correspond to the corresponding channel port It is equipped with a voice control module for transmitting the digital audio signal to the RoIP module interlocked with
RoIP-based wireless communication relay system for single frequency communication. According to claim 1,
When the receiving radio receives a communication end detection code from the transmitting radio, the receiving radio transmits a receiving end message to the receiving RoIP server.
RoIP-based wireless communication relay system for single frequency communication. According to claim 1,
The transmission signal detection module further includes a remote that turns on (ON) the transmission path and turns off (OFF) the transmission path when the transmission signal is transmitted.
RoIP-based wireless communication relay system for single frequency communication. According to claim 3,
The remote is a single frequency short communication that turns off the transmission path in the standby state while maintaining the reception path on (ON).
RoIP-based wireless communication relay system for single frequency communication. The method of claim 4,
The remote is that a plurality of remotes are connected in series
RoIP-based wireless communication relay system for single frequency communication.