KR101583028B1 - Triple band RF conference call systems and master-slave role determination methods - Google Patents

Triple band RF conference call systems and master-slave role determination methods Download PDF

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Publication number
KR101583028B1
KR101583028B1 KR1020150080068A KR20150080068A KR101583028B1 KR 101583028 B1 KR101583028 B1 KR 101583028B1 KR 1020150080068 A KR1020150080068 A KR 1020150080068A KR 20150080068 A KR20150080068 A KR 20150080068A KR 101583028 B1 KR101583028 B1 KR 101583028B1
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KR
South Korea
Prior art keywords
interface
signal
band
voice
frequency band
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KR1020150080068A
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Korean (ko)
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이세영
정덕인
서종철
이종명
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세영정보통신(주)
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The present invention relates to a triple RF band conference call system and a master-slave role determination method. The triple RF band conference call system includes: a transceiver including a transmitter transmitting a voice signal to an adjacent user and a receiver receiving the voice signal to the adjacent user; a signal converter mutually converting the voice signal to a digital signal or an analog signal; a filter unit comprising an encoder encoding the signal received from the signal converter and a decoder restoring the encoded signal to an original state signal; a base band comprising a plurality of base band chips which correct an error if the error occurs in the voice signal received in the filter unit, form a frame format, and directly control a frequency band; and a radio frequency (RF) interface comprising a first RF interface, a second RF interface, and a third RF interface, thereby enabling communications in a very noisy environment.

Description

[0001] The present invention relates to a triple RF band conference call system and a master-slave role determination method,

The present invention relates to a triple RF band multiparty call system and method. More specifically, it transmits and receives the same digital voice signals by using three frequency bands of 2.4 GHz, 900 MHz and 400 MHz, and is composed of a bone conduction microphone and an in-ear speaker, thereby enabling communication in a noisy environment And a method for providing the same.

Generally, in a small-scale military operation, police, and fire fighting, each of the team members has a transceiver for short-range communication for commanding and communicating, and such a transceiver for short- A master transceiver and a slave transceiver that performs operations by receiving operations and commands.

The master transceiver is configured to transmit and receive voice signals to all sub transceivers and the sub transceiver is configured to transmit and receive voice signals only to the main transceiver so that a user using the sub transceiver can transmit and receive with the master transceiver, There were some restrictions among users.

Accordingly, in Korean Patent No. 10-0915839, a plurality of members possessing a sub-walkie-talkie can simultaneously perform wireless voice communication with two pairs of twins, and by using the sub-walkie as a wired / wireless handset of a main walkie, There is no need to separately provide a wired handset and a wireless handset, and a plurality of members having a sub-walkiephone can selectively perform voice and text communication, and only one main walkie-talkie, such as a train, an armored vehicle, There has been disclosed a multi-radio communication system of a transceiver capable of mutually wireless communication without limitation of a radius of action by using a sub-transceiver possessed by a rider.

However, when there is a problem in the frequency band selected by the users, it takes a long time to recover the trouble and the trouble, and the user using the master transceiver can not intermittently communicate the urgent message to the user using the slave transceiver.

(Patent 0001) Korean Patent No. 10-0915839

In order to solve the problems of the related art, the present invention is to transmit and receive the same digital voice signals in a multi-way manner using three frequency bands of 2.4 GHz, 900 MHz, and 400 MHz, and includes a bone conduction microphone and an in- And provides a triple RF band multi-party call system and a method for communicating in a noisy environment.

In addition, the present invention provides a triple RF band multi-party call system and a method for providing emergency message transmission / reception, failure recovery, multi-party service status monitoring, and device location information sharing using a 400 MHz frequency band.

In addition, the present invention can dynamically attenuate a signal received by an RF transceiver through a CPU control, thereby adjusting the transmission / reception range between the devices, finely adjusting the communication service range, and stabilizing the communication quality in the service group And a method of providing the same.

According to an aspect of the present invention, there is provided a triple RF band multi-party call system including a transmitter configured to communicate with a neighboring user and configured to transmit a voice signal to an adjacent user, a receiver configured to receive a voice signal from an adjacent user, A signal converter configured to convert a voice signal received from the transceiver or an adjacent communication terminal into a digital signal or an analog signal, and a signal converter to encode or decode a voice signal received from the signal converter or the adjacent communication terminal A filter unit including an encoder for encoding a signal received from the signal converter and a decoder for restoring a coded signal to an original signal, an error detection unit for detecting an error in a speech signal received by the filter unit, Occurs A base band formed of a plurality of baseband chips configured to directly control a frequency band in an RF interface, and a base band configured to generate a preamble, A first RF interface configured to receive and communicate with an adjacent communication terminal, a second RF interface configured to communicate with an adjacent communication terminal, and a second RF interface configured to monitor and diagnose the service status of the first RF interface and the second RF interface, And a third RF interface in which a frequency band for setting a frequency band is set.

The transmitter may further include a bone conduction microphone for converting a voice signal inputted through the vibrating vibration of the bone into an electrical waveform and transmitting the voice wave when the user speaks voice.

The receiver may be configured to be surrounded by an in ear type finishing material for inserting a speaker into the ear.

The communication terminal may further include a main processing unit configured to monitor a conference service state of the first RF interface and the second RF interface and to recover from a failure and an error when a failure and an error occur, And an auxiliary memory device configured to store data information such as frequency and group code information to be used.

In addition, the main processing apparatus includes a function of dynamically attenuating a signal received from the RF interface.

The RF interface may further include an RF interface having a stronger signal strength by comparing a frequency band set in the first RF interface with a signal received in a frequency band set in the second RF interface, do.

In addition, the RF interface is characterized in that the communication terminal is configured as a TMDA / TDD system so as to enable bi-directional communication and multi-user voice communication.

The third RF interface may be directly controlled by the baseband chip or may be directly controlled by the main processing unit.

The third RF interface may be set to be lower than a frequency band of the first RF interface and the second RF interface.

A master-slave role determination method using a triple RF band multi-party call system including a transceiver, a signal converter, a filter unit, a baseband, and an RF interface includes: setting and applying a frequency and a group code to be used from an auxiliary memory; A step of scanning the synchronous signal transmitted from the peripheral device, a step of receiving the synchronous signal at the RF interface, and a step of booting the master and the slave terminal.

According to the embodiment of the present invention, the same digital voice signals are transmitted / received in a multi-way manner using three frequency bands of 2.4 GHz, 900 MHz, and 400 MHz, and a bone conduction microphone and an in- Can communicate in severe environment.

In addition, according to the embodiment of the present invention, it is possible to transmit / receive urgent messages, repair failures, monitor the status of multi-party services, and share device location information using the 400MHz frequency band.

Also, according to the embodiment of the present invention, by dynamically attenuating the signal received by the RF transceiver through the CPU control, the range of the communication service can be finely adjusted by adjusting the transmission / reception range between the devices, The communication quality can be stabilized.

Figs. 1A and 1B are an overall configuration diagram of a first embodiment of a triple RF band multi-
2 is an operational block diagram of a first embodiment of a triple RF band multi-
FIGS. 3A and 3B are a flowchart of the determination of the first embodiment of the triple RF band master-
4 is a block diagram of a triple RF band master-slave role determination method.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications are possible.

FIG. 1 is an overall block diagram of a first embodiment of a triple RF band multi-party call system; FIG. 2 is an operating block diagram of a first embodiment of a triple RF band multi- Figure 4 is a block diagram of a triple RF band master-slave role determination method.

A triple RF band multi-party communication system for establishing and communicating three frequency bands, comprising: a transceiver 110 capable of transmitting and receiving between users as shown in FIGS. 1A and 1B and FIG. 2; A filter unit 130 configured to correct and transmit a part of the audio signal when an error occurs, and to convert the audio signal into a transmission signal, An RF interface 150 in which a transmission signal and a high frequency signal are converted to each other, an antenna 160 configured to transmit and receive a voice signal, an antenna 160 configured to control the communication terminal 100 And an auxiliary memory 180 for storing various data such as frequency and group code.

The communication terminal 100 is a device configured to allow a user to perform voice communication between a user and a master terminal 101 communicating with an administrator and a commander and a plurality of users using commands and notifications from the master terminal 101 And a slave terminal 103 which can receive the slave terminal 103.

The transceiver 110 is configured to communicate by communicating communication, and comprises a transmitter 111 configured as a micro-controller and a receiver 113 configured as a speaker.

The transmitter 111 collectively refers to all the transmitters configured to transmit the user's communication to other users. In the present invention, the transmitter 111 includes a bone conduction microphone that can be used in a noisy environment.

Here, the bone conduction microphone is configured so that when a user speaks a voice, the voice signal that is introduced through the vibration of the bones is converted into an electrical waveform and is less influenced by wind noise and ambient noise.

The receiver 113 collectively refers to all receivers configured to be able to communicate by receiving a voice signal received from another user. In the present invention, the receiver 113 is surrounded by an in ear type finishing material for inserting a speaker into the ear It is preferable to separate the sound input from the outside and the sound output from the speaker so as to enable clear communication.

The signal converter 120 is configured to convert a voice signal generated from the transmitter 111 or convert a voice signal received through the antenna 160 and transmit the converted voice signal to the receiver 113 so that the user can receive the voice signal. The voice signal generated in the transmitter 111 is converted into a digital signal and transmitted to the filter unit 130. The digital signal received through the antenna 160 is converted into an analog signal and transmitted to the receiver 113. [

In addition, the signal converter 120 is configured to apply the data payload generated in the main processor 170, which will be described later, and the frequency, group code, and security code stored in the auxiliary storage device 180. [

The filter unit 130 is configured to detect an error signal when transmitting and receiving a digital signal generated in the signal converter 120 and a transmission signal formed in the base band. When the error signal is detected, the filter unit 130 outputs a corresponding error signal It is desirable to be configured so that even if some error occurs, it can be corrected and corrected by itself and smoothly communicated.

In addition, the filter unit 130 includes an encoder 131 for encoding a voice signal for standardization of the signal type and format, security, improvement of the processing speed, storage space saving, and the like, And a decoder 133.

The encoder 131 is configured to encode the digital voice signal generated by the signal converter 120, thereby performing communication security, processing speed improvement, data compression, and the like, and performs encoding processing.

The decoder 133 is configured to smoothly convert the encoded signal from the baseband 140 into a digital voice signal, so that the signal converter 120 can be smoothly converted from a digital signal to an analog signal.

The base band 140 connected to the filter unit 130 applies a group code and a security code to the encoded signal transmitted from the encoder of the filter unit, applies error detection and correction codes, and then generates a preamble, And detects the wirelessly received signal using the correlator based on the generated preamble information, performs the error detection and correction process to perform the data payload restoration operation, applies the group code and the security code, And the like.

The RF interface 150 is configured to transmit and receive a predetermined frequency band in a set frequency band. Each of the RF interfaces 150 is configured to transmit a digital signal received from the baseband 140 in a frequency shift keying manner And transmits the received signal through the frequency and the received signal to the baseband 140 without filtering or attenuates the received signal in response to the instruction of the main processing unit 170. In addition, 150 and a baseband 140 is configured to synchronize a time managed for each device to configure a data link so as to enable communication between a plurality of wireless communication devices 100, In order to enable multi-party voice communication to enable bidirectional communication based on the communication link, TMDA / TDD .

The RF interface 150 includes a first RF interface 151 for setting and using a 2.4 GHz frequency band, a second RF interface 153 for setting and using a 900 MHz frequency band, And a third RF interface 155,

The first RF interface 151 is configured to set a frequency band of 2.4 GHz and the second RF interface 153 is configured to transmit and receive a voice signal between users by setting a 900 MHz frequency band. The first RF interface 151 and the second RF interface 153 may be simultaneously transmitted through the frequency band or may be transmitted through the frequency band of the selected RF interface in response to the command of the main processing unit 170, The data signals simultaneously received through the interface 151 and the second RF interface 153 are transmitted to the base band 140 and are capable of attenuating the received signal strength at a certain level when there is an instruction from the main processing unit .

The signal received through the first RF interface 151 and the second RF interface 153 is compared with the received signal strength and the error detection and recovery level in the base band 140 to select or restore the received signal having a good state, Thereby improving the communication stability through the frequency diversity and the reception diversity effect.

The first RF interface 151 and the second RF interface 153 are configured to control a voice signal through a baseband chip 141 having a corresponding frequency band and transmit and receive a synchronization signal for a wireless network configuration , It is desirable that the user is configured to be able to send and receive the conference service control payload to request, respond, and manage the originating authority.

The third RF interface 155 having the 400 MHz frequency band is controlled by the main processing unit 170 to monitor the service status of the first RF interface 151 and the second RF interface 153 and to diagnose And is a frequency band configured to identify the position and device state between each user.

If the first RF interface 151 and the second RF interface 153 can not communicate with each other due to device failure and noise, the third RF interface 155 transmits / receives a data payload for urgent message transmission to the user or the administrator So that it can be used in emergency communication when there is a problem between the first RF interface 151 and the second RF interface 153.

Here, the third RF interface 155 may be configured in a controlled manner, but not limited to, the baseband 140 as shown in 1a. As shown in FIG. 1B, the main processing unit 170 ) May directly be controlled by a control unit.

When the third RF interface 155 is configured to receive the control of the baseband 140, the load of the main processor 170 is reduced and the probability of failure is lowered even if the third RF interface 155 is used for a long time. The baseband chip 141 can be fabricated to reduce the manufacturing cost.

In addition, the wireless communication unit including the baseband 140 and the RF interface 150 is configured to be able to perform multi-party communication by distinguishing voice channels in TDMA / TDD and time division manner, Of course.

The antenna 160 is a device configured to transmit / receive data between the communication terminals 100.

The main processing unit 170 is a device that directly or indirectly controls the third RF interface 155 and monitors the first RF interface 151 and the conference service status of the second RF interface 153, 1 RF interface 151 and the second RF interface 153 when a failure or an error occurs, the failure and the error are recovered.

The main processor 170 controls not only the third RF interface 155 but also the first RF interface 151 and the second RF interface 153 so that data payloads and synchronization signals can be transmitted and received Role.

The auxiliary storage device 180 is a device configured to store data information such as frequency and group code information to be used in the RF interface 150. The auxiliary storage device 180 includes a first RF interface 151 and a second RF interface 153, And provides various data to transmit and receive a synchronization signal with the communicator 100.

3A, when the master terminal 101 and the plurality of slave terminals 103 are used to configure one network, the master terminal 101 transmits a certain network based on the master terminal 101 Way communication between the master terminal 101 and the slave terminal 103. The master terminal 101 and the slave terminal 103 are connected to each other.

Here, when the slave terminal 103 acquires a voice right to the master terminal 101 and transmits a voice signal to a plurality of slave terminals 103 under the master terminal 101 and the master terminal 101, Another slave terminal 103b deviating from the network constituted from one slave terminal 103a may not be able to receive a voice signal.

The slave terminal 103 transmits the intensity of all the synchronization signals received from the master through the RF interface 150 through the main processing unit 170 of all the slave terminals 103, 103a and 103b under the master terminal 101 It is preferable that the master terminal 101 is configured to be capable of dynamically attenuating the master terminal 101 so as to transmit it to all the slave terminals 103 configured under the master terminal 101.

The base station 140, the RF interface 150, the antenna 160, the main processor 170, and the auxiliary memory 180 are connected to the transceiver 110, the signal converter 120, the filter unit 130, In the method of determining the master-slave role in the triple RF band multi-party communication system, information on a frequency and a group code to be used is read from the auxiliary storage device 180 (S110) The interface 151 and the information of the frequency and the group code read from the auxiliary memory device 180 are applied to the second RF interface 153 at step S120.

The first RF interface 151 and the second RF interface 153 to which the information of the frequency and the group code to be used are applied are scanned to receive the synchronization signal transmitted from the adjacent communication terminal 100 at step S130, .

If it is determined that the frequency of the adjacent communication terminal 100 is the same as the group code of the adjacent communication terminal 100 in step S150, (S160), and the slave terminal 103 is booted (S170).

If it is determined in step S140 that the sync code is not received or if the group code of the received sync signal does not match in step S150, it is checked whether the number of times of the cumulative sync signal scan exceeds three times in step S180. The signal is scanned (S130) and the master terminal 101 is booted when the number of scanning times of the synchronous signal exceeds three times.

Although the present invention has been described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is to be understood that the present invention is not limited thereto, It is to be understood that various modifications and changes may be made without departing from the scope of the appended claims.

100: communication terminal 101: master terminal
103: Slave terminal 110: Transceiver
111: Transmitter 113: Receiver
120: signal converter 130: filter unit
131: Encoder 133: Decoder
140: base band 141: base band chip
150: RF interface 151: first RF interface
153: second RF interface 155: third RF interface
160: antenna 170: main processing unit
180: Auxiliary memory

Claims (10)

A communication terminal for establishing and communicating three frequency bands,
A transceiver configured to communicate between adjacent users, the transceiver comprising a transmitter for transmitting a voice signal to an adjacent user and a receiver for receiving a voice signal to an adjacent user;
A signal converter configured to convert a voice signal received from the transceiver or an adjacent communication terminal into a digital signal or an analog signal;
An encoder for encoding or decoding a speech signal received from the signal converter or the adjacent communication terminal and encoding the signal received from the signal converter; and a decoder for decoding the encoded signal into an original signal, ;
And a controller configured to detect an error in the voice signal received by the filter unit and to correct an error if an error occurs, the apparatus comprising: a plurality of units configured to generate a preamble to form a frame format, A base band made of a base band chip; And
A first RF interface configured to communicate with an adjacent communication terminal, a second RF interface configured to transmit / receive a predetermined frequency band and set / A frequency band to be used for monitoring, fault diagnosis and recovery is set, and when a communication is impossible, a data payload for urgent message transmission is transmitted to a user or an administrator, and is directly controlled by the baseband chip Or an RF interface consisting of a third RF interface that is directly controlled by the main processing unit;
And a third RF band-to-band call system.
The method according to claim 1,
The transmitter includes:
And a bone conduction microphone for transmitting a voice signal, which is transmitted through a vibration resonating from the bone, into an electrical waveform and transmitting the voice wave when the user speaks voice.
The method according to claim 1,
The receiver includes:
And an ear-type finish material for inserting a speaker into the ear. ≪ Desc / Clms Page number 19 >
The method according to claim 1,
The communication terminal includes:
A main processing unit configured to monitor a conference service state of the first RF interface and the second RF interface and to recover from a failure and an error when a failure and an error occur; And
An auxiliary memory configured to store data information such as frequency and group code information to be used in the RF interface;
Further comprising the step of: receiving a call request message from the radio base station.
5. The method of claim 4,
The main processing apparatus includes:
And a function of dynamically attenuating a signal received at the RF interface.
The method according to claim 1,
The RF interface
And selecting an RF interface having a stronger signal strength by comparing a frequency band set in the first RF interface with a signal received in a frequency band set in the second RF interface, .
delete delete The method according to claim 1,
The third RF interface includes:
Wherein the frequency band of the first RF interface and the frequency of the second RF interface are set lower than the frequency band of the first RF interface and the second RF interface.
delete
KR1020150080068A 2015-06-05 2015-06-05 Triple band RF conference call systems and master-slave role determination methods KR101583028B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010008240A (en) * 2000-11-16 2001-02-05 이진섭 CDMA Repeater Guard System by N:1 Muliple Connecting Method
KR100548414B1 (en) * 2003-10-09 2006-02-02 엘지전자 주식회사 Mobile communication terminal equipped with triple mode function
KR100915839B1 (en) 2009-04-23 2009-09-07 성진씨앤티(주) Multilateral wireless communication system
KR101436593B1 (en) * 2014-06-09 2014-09-15 세영정보통신(주) Radio Transmitting/Receiving Apparatus Using RF Dual Band

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010008240A (en) * 2000-11-16 2001-02-05 이진섭 CDMA Repeater Guard System by N:1 Muliple Connecting Method
KR100548414B1 (en) * 2003-10-09 2006-02-02 엘지전자 주식회사 Mobile communication terminal equipped with triple mode function
KR100915839B1 (en) 2009-04-23 2009-09-07 성진씨앤티(주) Multilateral wireless communication system
KR101436593B1 (en) * 2014-06-09 2014-09-15 세영정보통신(주) Radio Transmitting/Receiving Apparatus Using RF Dual Band

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