KR101271553B1 - 2.4 ghz ism frequency terminal for sending/receiving multiple data and method sending/receiving multiple data - Google Patents

Abstract

PURPOSE: A 2.4 GHz ISM (Industrial Scientific and Medical equipment) frequency terminal and a multiple data transmission/reception method thereof are provided to transmit synthesized data through a one-time section by synthesizing data coming from several ISM frequency slave terminals through an independent time section. CONSTITUTION: A transmission buffer (170) stores synthesized multiple data. A transmission module (180) transmits the stored multiple data to an ISM frequency slave terminal. A synchronization module (190) transmits a synchronization signal for synchronizing the transmission/reception timing of a reception module and the transmission module. The synchronization module receives the data from the ISM frequency slave terminal. The synchronization module transmits the multiple data stored in the transmission buffer. [Reference numerals] (110) Reception module; (120) Reception buffer 1; (121) Reception buffer 2; (122) Reception buffer 3; (130) Data synthesis module 1; (131) Data synthesis module 2; (140) Regeneration buffer; (150) Regeneration module; (160) Master terminal data storage buffer; (170) Transmission buffer; (180) Transmission module; (190) Synchronization module

Description

2.4GHz ISM frequency terminal and multiple data transmission / reception method for multiple data transmission and reception {2.4 GHz ISM FREQUENCY TERMINAL FOR SENDING / RECEIVING MULTIPLE DATA AND METHOD SENDING / RECEIVING MULTIPLE DATA}

The present invention relates to a 2.4 GHz industrial scientific and medical equipment (ISM) frequency terminal and a multiple data transmission / reception method. More specifically, the present invention relates to a 2.4 GHz ISM frequency terminal and multiple data transmission / reception to efficiently transmit and receive sound data without mutual loss. It is about a method.

The International Telecommunication Union (ITU) allocates freely available industrial scientific and medical equipment (ISM) frequency bands for high-frequency devices used for industrial, scientific and medical purposes. The ISM frequency band is a frequency band of approximately 2.4 GHz, with minimum requirements only for fundamental wave and radio wave intensity, and the use of frequency is freely allowed for designers of high frequency devices.

Recently, terminals capable of transmitting and receiving audio source data and reproducing among terminals within a local area network of an ISM frequency have been used. Even if there are several terminals in the local area network, it is possible to transmit and receive sound data. At this time, several ISM frequency slave terminals transmit and receive sound data in accordance with the synchronization signal of one ISM frequency master terminal. However, when there are a plurality of terminals as described above, there are various problems. Hereinafter, with reference to the accompanying Figures 2 and 3 will be described in detail.

1 is a conceptual diagram illustrating a synchronization signal transmission and reception of an ISM frequency terminal according to the prior art.

The local area network of the ISM frequency band is composed of the ISM frequency master terminal 100 and the ISM frequency slave terminals 200, 201, and 202. Only one ISM frequency master terminal 100 exists in one ISM local area network, and a plurality of ISM frequency slave terminals 200, 201, and 202 may exist. The ISM frequency master terminal 100 generates a synchronization signal at boot time and sends it to other ISM frequency slave terminals 200, 201, 202 to adjust the transmission and reception timing. In addition, different ISM frequency slave terminals 200, 201, and 202 communicate directly with each other.

2A is a conceptual diagram illustrating a problem of an ISM frequency terminal according to the prior art.

Referring to FIG. 2A, a plurality of ISM frequency slave terminals 200, 201, and 202 may all be included in a local area network within a radio wave reach within the ISM frequency master terminal 100, but different ISM frequency slave terminals may be included. Between 200 and 201, there is a distance that can be directly communicated. That is, since the ISM frequency slave terminal 200 and the ISM frequency slave terminal 201 do not communicate with each other, problems of poor communication quality, unreceivable state, and inaccurate synchronization occur.

2b is a timing diagram of an ISM frequency terminal according to the prior art.

Referring to FIG. 2B, here, the ISM frequency master terminal 100 or the other ISM frequency slave terminals 200, 201, and 202 each time-divisionally transmit and receive their respective data. That is, when data is transmitted in a time period allocated to one terminal, the other terminals are configured to receive only.

3A is a conceptual diagram illustrating a problem of another conventional ISM frequency terminal.

Referring to FIG. 3A, the ISM frequency master terminal 100 receives all data from other ISM frequency slave terminals 200 in time division and transmits the data in time division again. However, unlike FIG. 2A, referring to FIG. 3B, FIG. 3A has a time interval of an idle state. For example, when the ISM frequency slave terminal 200 transmits data to the ISM frequency master terminal 100, only the ISM frequency master terminal 100 is in a reception state, and the remaining ISM frequency slave terminals 201 and 202 are waiting. It becomes a state. The ISM frequency master terminal 100 transmits the data received from the ISM frequency slave terminal 200 to the remaining ISM frequency slave terminals 201 and 202, where the ISM frequency slave terminal 200 is in a standby state. In the next time interval, the ISM frequency master terminal 100 transmits its pre-stored data to all ISM frequency slave terminals 200, 201, and 202. In this way, periodic time periods are allocated for all ISM frequency slave terminals 200, 201, 202. That is, since the ISM frequency master terminal 100 retransmits the data of all the ISM frequency slave terminals 200, 201, and 202, the problem of communication quality deterioration or inability to receive according to the distance between terminals is solved, but more than in FIG. 2A. There is a problem that requires a large time period.

3B is a timing diagram of another ISM frequency terminal according to the prior art.

3B is a frame structure according to FIG. 3A. As described above, when the communication between some ISM frequency slave terminals and the IMS frequency master terminal 100 is performed, the other ISM frequency slave terminals may be in a standby state. In addition, since the ISM frequency master terminal 100 needs to send its own data through another time period, 1/2 of the time resource is required as a whole than the method of FIG. 2A.

Republic of Korea Patent No.0509223 (2005.08.11)

An object of the present invention is to provide a 2.4 GHz ISM frequency master terminal for multiple data transmission and reception.

Another object of the present invention is to provide a 2.4 GHz ISM frequency slave terminal for multiple data transmission and reception.

Still another object of the present invention is to provide a multiple data transmission / reception method of a 2.4 GHz ISM frequency master terminal.

It is still another object of the present invention to provide a multiple data transmission / reception method of a 2.4 GHz ISM frequency slave terminal.

An ISM frequency master terminal for 2.4 GHz multi-data transmission / reception according to the object of the present invention includes a receiving module for receiving sound source data from an ISM frequency slave terminal, a receiving buffer for storing the received sound source data, the stored sound source data and A data synthesizing module for synthesizing prestored sound source data to generate multiple data, a transmission buffer for storing the synthesized multiple data, a transmission module for transmitting the stored multiple data to the ISM frequency slave terminal, the reception module and a transmission module of And a synchronization module for transmitting a synchronization signal for synchronizing transmission and reception timing to the ISM frequency slave terminals, time-divisionally receiving data from each of the ISM frequency slave terminals, and time-divisionally transmitting multiple data stored in the transmission buffer. Here, the ISM frequency master terminal may be configured to transmit the synchronization signal at initial boot.

An ISM frequency slave terminal for 2.4 GHz multiple data transmission and reception according to the object of the present invention includes a transmission buffer for storing sound source data for transmission, a transmission module for transmitting sound source data to an ISM frequency master terminal, and the ISM frequency master terminal A receiving module for receiving multiple data from the receiver, a receiving buffer for storing the received multiple data, a data analysis module for parsing the stored multiple data into respective sound source data, and a sound source transmitted through the transmitting module among the parsed sound source data A reproduction module for reproducing only sound source data excluding data, and a synchronization module for receiving synchronization signals from the ISM frequency master terminal and synchronizing transmission and reception timings of the transmission module and the reception module. In this case, the transmitting module stores the transmitted sound source data in a temporary buffer, and the data analysis module compares the parsed sound source data with data stored in the temporary buffer and reproduces sound source data not stored in the temporary buffer. And the reproducing module is configured to reproduce the sound source data stored in the reproducing buffer.

In the multiple data transmission / reception method of a 2.4 GHz ISM frequency master terminal according to another object of the present invention, transmitting a synchronization signal to an ISM frequency slave terminal, and sound source data from each of the ISM frequency slave terminals according to the transmitted synchronization signal Time-dividing and receiving, storing the received sound source data in a reception buffer, synthesizing the stored sound source data and pre-stored sound source data to generate multiple data, and storing the synthesized multiple data in a transmission buffer. And time-divisionally transmitting the stored multiple data to the ISM frequency slave terminal according to the transmitted synchronization signal. In this case, the transmitting of the synchronization signal to the ISM frequency slave terminal may be configured to transmit a synchronization signal at initial booting, and when there are two or more received sound source data, the received sound source data may be synthesized. .

In a multiple data transmission / reception method of a 2.4 GHz ISM frequency slave terminal according to another object of the present invention, receiving a synchronization signal from an ISM frequency master terminal, transmitting data to an ISM frequency master terminal according to the received synchronization signal Performing time division reception of multiple data from the ISM frequency master terminal, storing the received multiple data in a reception buffer, parsing the stored multiple data, and outputting respective sound source data; And reproducing only the sound source data excluding the sound source data transmitted to the ISM frequency master terminal among sound source data. In this case, transmitting data to the ISM frequency master terminal according to the received synchronization signal may include storing the transmitted data in a temporary buffer and parsing the stored multiple data to output respective sound source data. Storing data not stored in the temporary buffer among the respective sound source data in a reproduction buffer, and reproducing only the sound source data except for the sound source data transmitted to the ISM frequency master terminal among the output sound data; It is preferably configured to play back the data stored in the buffer.

According to the 2.4 GHz ISM frequency terminal and multiple data transmission and reception method for multiple data transmission and reception as described above, after the ISM frequency master terminal receives data from each ISM frequency slave terminal through an independent time period and synthesizes it with its own data, By time-division transmission through one time period, the problem of communication quality deterioration with respect to distance or inaccuracy of synchronization is solved. In addition, since there is no need to allocate more time periods to the ISM frequency master terminal, time resources can be efficiently utilized.

1 is a conceptual diagram illustrating a synchronization signal transmission and reception of an ISM frequency terminal according to the prior art.
2A is a conceptual diagram illustrating a problem in transmitting and receiving data of an ISM frequency terminal according to the prior art.
2b is a timing diagram of an ISM frequency terminal according to the prior art.
3A is a conceptual diagram illustrating a problem in transmitting and receiving data of an ISM frequency terminal according to the prior art.
3B is a timing diagram of another ISM frequency terminal according to the prior art.
4A is a conceptual diagram illustrating a multiple data transmission scheme of an ISM frequency terminal according to an embodiment of the present invention.
4B is a timing diagram of an ISM frequency terminal according to an embodiment of the present invention.
5 is a block diagram of an ISM frequency master terminal for multiple data transmission and reception according to an embodiment of the present invention.
6 is a block diagram of an ISM frequency slave terminal for multiple data transmission and reception according to an embodiment of the present invention.
7 is a conceptual diagram illustrating a buffering operation of an ISM frequency slate terminal according to an embodiment of the present invention.
8 is a flowchart illustrating a multiple data transmission / reception method of an ISM frequency master terminal according to an embodiment of the present invention.
9 is a flowchart illustrating a multiple data transmission / reception method of an ISM frequency slave terminal according to an 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 should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. In describing the drawings, like reference numerals refer to like elements.

The terms first, second, A, B, 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.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. 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 herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, and 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. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

4A is a conceptual diagram illustrating a multiple data transmission scheme of an ISM frequency terminal according to an embodiment of the present invention.

4A, the ISM frequency master terminal 100 according to an embodiment of the present invention receives data from any one ISM frequency slave terminal 200 through a pre-allocated time interval, and receives the received data and the ISM. The frequency master terminal 100 synthesizes its own data and transmits the data to the ISM frequency slave terminals 200, 201, and 202 through the next time interval. Here, since the ISM frequency master terminal 100 retransmits the data to all the ISM frequency slave terminals 200, 201, and 202, problems such as deterioration of communication state according to distance are solved. In addition, since the received data and its own data are synthesized and time-divisionally transmitted through one time period, time resources can be efficiently utilized.

4B is a timing diagram of an ISM frequency terminal according to an embodiment of the present invention.

4B illustrates the frame structure of FIG. 4A, in which the ISM frequency slave terminal 200 transmits data to the ISM frequency master terminal 100 in the first time period. At this time, the remaining ISM frequency slave terminals 201 and 202 are in a standby state. In the second time period, the ISM frequency slave terminal 201 transmits data to the ISM frequency master terminal 100. At this time, the remaining ISM frequency slave terminals 200 and 202 are in a standby state. The ISM frequency master terminal 100 synthesizes the data of the ISM frequency slave terminals 200 and 201 and its own data and transmits the data through the next one time period. It can be seen that data is also transmitted and received with other ISM frequency slave terminals 202 in this manner. The communication problem according to the distance occurring in FIG. 2A is solved, and the problem of allocation of more time periods occurring in FIG. 3A is solved. That is, in the present invention, both the advantages of the time resource distribution of FIG. 2A and the reliability of the communication of FIG. 3A are guaranteed.

5 is a block diagram of an ISM frequency master terminal for multiple data transmission and reception according to an embodiment of the present invention.

Referring to FIG. 5, the ISM frequency master terminal 100 for multiple data transmission and reception according to an embodiment of the present invention includes a receiving module 110, a receiving buffer 1 120, a receiving buffer 2 121, and a receiving buffer 3. (122), data synthesizing module 1 (130), data synthesizing module 2 (131), reproduction buffer (140), reproduction module (150), master terminal data storage buffer (160), transmission buffer (170), transmission module ( 180, configured to include a synchronization module 190. Hereinafter, the detailed configuration will be described.

The receiving module 110 may be configured to receive data from the ISM frequency slave terminals 200, 201, 202. It may be configured to operate in the ISM frequency band. In this case, the data may be sound source data.

The reception buffer 1 120, the reception buffer 2 121, and the reception buffer 3 122 are configured to store sound source data received through the reception module 110. In this case, the reception buffer 1 120, the reception buffer 2 121, and the reception buffer 3 122 may be configured to be allocated as many as the number of ISM frequency slave terminals.

The data synthesis module 1 130 may be configured to synthesize sound source data stored in the reception buffer 1 120, the reception buffer 2 121, and the reception buffer 3 122, and transmit the synthesized sound source data to the data synthesis module 2 131. In addition, it is configured to store the sound source data stored in the reception buffer 1 (120), the reception buffer 2 (121), and the reception buffer 3 (122) in the reproduction buffer (140).

The reproduction module 150 is configured to reproduce sound source data stored in the reproduction buffer 140.

The data synthesizing module 2 131 synthesizes the data received from the data synthesizing module 1 130 and its data previously stored in the master terminal data storage buffer 160 to generate multiple data. The generated multiple data is stored in the transmission buffer 170.

The transmission module 180 may be configured to transmit the multiple data stored in the transmission buffer 170 to the ISM frequency slave terminals 200, 201, 202. That is, configured to transmit to all ISM frequency slave terminals.

The synchronization module 190 may be configured to transmit a synchronization signal for synchronizing transmission and reception timings of the reception module 110 and the transmission module 180 to the ISM frequency slave terminals 200, 201, and 202. The ISM frequency master terminal 100 generates and transmits a synchronization signal at boot time, and synchronizes transmission and reception timing with other ISM frequency slave terminals 200, 201, and 202 according to a preset protocol. In this case, the synchronization module 190 may be configured to control the time division reception of data from each of the ISM frequency slave terminals 200, 201, and 202 and the time division transmission of multiple data stored in the transmission buffer 170.

6 is a block diagram of an ISM frequency slave terminal for multiple data transmission and reception according to an embodiment of the present invention.

Referring to FIG. 6, the ISM frequency slave terminal 200 for multiple data transmission and reception according to an embodiment of the present invention includes a transmission buffer 210, a transmission module 220, a temporary buffer 221, and a reception module 230. And a receive buffer 240, a data analysis module 250, a playback module 260, a playback buffer 261, and a synchronization module 270. Hereinafter, the detailed configuration will be described.

The transmission buffer 210 is a configuration for storing data for transmission. Here, the data may be sound source data as described above.

The transmission module 220 may be configured to transmit data to the ISM frequency master terminal 100. In this case, time division transmission may be configured through a pre-allocated time period.

The temporary buffer 221 is a component for storing data transmitted through the transmission module 220. This is a configuration for canceling or eliminating when the ISM frequency slave terminal 200 receives data transmitted by the ISM frequency slave terminal 200 again.

The receiving module 230 may be configured to receive multiple data from the ISM frequency master terminal 100. Here, the multiple data is data obtained by synthesizing data previously received by the ISM frequency master terminal 100 from another ISM frequency slave terminal and its own data. At this time, the receiving module 230 may receive the data of its own previously transmitted by the ISM frequency slave terminal 200 again.

The reception buffer 240 is a configuration for storing multiple data received through the reception module 230.

The data analysis module 250 may be configured to parse multiple data stored in the reception buffer 240 into respective data. The data analysis module 250 parses the data of the ISM frequency master terminal 100 itself and the data of the ISM frequency slave terminals. At this time, the data analysis module 250 compares its own data stored in the temporary buffer 221 with the parsed data and discards its own data received from the ISM frequency master terminal 100 and stores it in the reproduction buffer 261. do. That is, the data of the ISM frequency slave terminal 200 itself is stored in the reproduction buffer 261 while being deleted.

The reproduction module 260 may be configured to reproduce only the remaining data except for the data transmitted through the transmission module 220 among the data parsed by the data analysis module 250. As described above, the reproduction module 260 reproduces the data stored in the reproduction buffer 261.

The synchronization module 270 may be configured to receive a synchronization signal from the ISM frequency master terminal 100 to synchronize transmission and reception timing of the transmission module 220 and the reception module 230.

7 is a conceptual diagram illustrating a buffering operation of an ISM frequency slate terminal according to an embodiment of the present invention.

Referring to FIG. 7, in <1>, first, the ISM frequency slave terminal 200 stores its data 1 and 2 in the transmission buffer 210, and the ISM frequency master terminal 100 also stores its own data 3. , 4 is stored in the transmission buffer 170. In <2>, the ISM frequency slave terminal 200 transmits '1' among the data stored in the transmission buffer 210 and stores it in the temporary buffer 221. In the transmission buffer 210, 1 is pushed out. Next, in <3>, the ISM frequency master terminal 100 receives 1 and stores it in the reception buffer 120. In <4>, the ISM frequency master terminal 100 synthesizes 3 stored in the transmission buffer 170 and transmits 1 stored in the reception buffer 120 to the ISM frequency slave terminal 200 through the next time period. Then, the ISM frequency slave terminal 200 receives the multiple data 1 and 3 and stores them in the reception buffer 240. Next, the ISM frequency slave terminal 200 parses the multiple data 1 and 3 stored in the reception buffer 240 and compares it with the data 1 stored in the temporary buffer 221. At this time, the same data 1 is deleted and only one other data 3 is stored in the reproduction buffer 261. The reproduction module 260 may reproduce one data 3 except for its own data.

8 is a flowchart illustrating a multiple data transmission / reception method of an ISM frequency master terminal according to an embodiment of the present invention.

Referring to FIG. 8, first, the ISM frequency master terminal 100 transmits a synchronization signal to the ISM frequency slave terminal 200 (S110). At this time, synchronization and time division transmission / reception timing are determined between the ISM frequency master terminal 100 and the ISM frequency slave terminals 200, 201, and 202.

Next, the ISM frequency master terminal 100 receives data from the ISM frequency slave terminal 200 according to the synchronization signal (S120). In this case, the ISM frequency master terminal 100 may be configured to time-divisionally receive data from each of the ISM frequency slave terminals 200, 201, and 202. Here, the data may be sound source data.

Next, the ISM frequency master terminal 100 stores the previously received data in the reception buffer 1 (120) (S130). At this time, when there are two or more received data, the received data is synthesized by the data synthesizing module 130.

Next, the ISM frequency master terminal 100 generates multiple data by synthesizing the data stored in the reception buffer 1 120 and its own data (S140).

Next, the ISM frequency master terminal 100 stores the synthesized multiple data in the transmission buffer 170 (S150).

The ISM frequency master terminal 100 transmits the multiple data stored in the transmission buffer 170 to the ISM frequency slave terminals 200, 201, and 202 according to the synchronization signal (S160). Here, the ISM frequency master terminal 100 may be configured to transmit multiple data to the ISM frequency slave terminals 200, 201, 202 according to the synchronization signal.

9 is a flowchart illustrating a multiple data transmission / reception method of an ISM frequency slave terminal according to an embodiment of the present invention.

Referring to FIG. 9, first, the ISM frequency slave terminal 200 receives a synchronization signal from the ISM frequency master terminal 100 (S210). This establishes the timing of synchronization and transmission and reception.

Next, the ISM frequency slave terminal 200 transmits data to the ISM frequency master terminal 100 according to the synchronization signal (S220). At this time, each of the ISM frequency slave terminals 200, 201, and 202 may be configured to time-divisionally transmit data. Here, the data may be sound source data.

In addition, the ISM frequency slave terminal 200 receives multiple data from the ISM frequency master terminal 100 (S230). In this case, each of the ISM frequency slave terminals 200, 201, and 202 may be configured to time-divisionally receive multiple data.

Next, the ISM frequency slave terminal 200 stores the multiple data in the reception buffer 240 (S240).

The ISM frequency slave terminal 200 parses multiple data stored in the reception buffer 240 and outputs each data (S250).

Next, the ISM frequency slave terminal 200 reproduces only the remaining data except for the data transmitted to the ISM frequency master terminal 100 among the respective output data (S260).

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

100: master terminal 110: receiving module
120: occasional buffer 130: synthesis module
160: storage buffer 170: transmission buffer
180: transmission module 190: synchronization module
200, 201, 202: slave terminal

Claims (8)

A receiving module for receiving sound source data from an ISM frequency slave terminal;
A reception buffer for storing the received sound source data;
A data synthesizing module for synthesizing the stored sound source data and pre-stored sound source data to generate multiple data;
A transmission buffer for storing the synthesized multiple data;
A transmission module for transmitting the stored multiple data to the ISM frequency slave terminal;
Transmitting a synchronization signal for synchronizing transmission / reception timing of the receiving module and the transmitting module to the ISM frequency slave terminal, time-divisionally receiving data from each of the ISM frequency slave terminals, and controlling to time-divisionally transmit multiple data stored in the transmission buffer. ISM frequency master terminal for multiple data transmission and reception comprising a synchronization module. The method of claim 1, wherein the ISM frequency master terminal,
ISM frequency master terminal for multiple data transmission and reception, characterized in that for transmitting the synchronization signal during the initial boot. A transmission buffer for storing sound source data for transmission;
A transmission module for transmitting sound source data to the ISM frequency master terminal;
A receiving module for receiving multiple data from the ISM frequency master terminal;
A reception buffer for storing the received multiple data;
A data analysis module for parsing the stored multiple data into respective sound source data;
A reproduction module for reproducing only sound source data excluding the sound source data transmitted through the transmitting module among the parsed sound source data;
And a synchronization module for receiving a synchronization signal from the ISM frequency master terminal and synchronizing transmission and reception timings of the transmission module and the reception module. The method of claim 3,
The transmitting module stores the transmitted sound source data in a temporary buffer,
The data analysis module compares the parsed sound source data with data stored in the temporary buffer and stores sound source data not stored in the temporary buffer in a reproduction buffer,
The reproduction module is an ISM frequency slave terminal for multiple data transmission and reception, characterized in that for reproducing the sound source data stored in the reproduction buffer. Transmitting a synchronization signal to the ISM frequency slave terminal;
Time-divisionally receiving sound source data from each of the ISM frequency slave terminals according to the transmitted synchronization signal;
Storing the received sound source data in a reception buffer;
Generating multiple data by synthesizing the stored sound source data and pre-stored sound source data;
Storing the synthesized multiple data in a transmission buffer;
Time-divisionally transmitting the stored multiple data to the ISM frequency slave terminal according to the transmitted synchronization signal. The method of claim 5, wherein the transmitting of the synchronization signal to the ISM frequency slave terminal comprises:
Multiple data transmission and reception method of the ISM frequency master terminal, characterized in that for transmitting a synchronization signal at the initial boot. Receiving a synchronization signal from an ISM frequency master terminal;
Transmitting data to an ISM frequency master terminal according to the received synchronization signal;
Time-divisionally receiving multiple data from the ISM frequency master terminal;
Storing the received multiple data in a reception buffer;
Parsing the stored multiple data to output respective sound source data;
And reproducing only the remaining sound source data except for the sound source data transmitted to the ISM frequency master terminal among the respective sound source data. The method of claim 7, wherein
Transmitting data to the ISM frequency master terminal according to the received synchronization signal, storing the transmitted data in a temporary buffer,
Parsing the stored multiple data to output respective sound source data includes: storing data not stored in the temporary buffer among the outputted sound source data in a reproduction buffer,
Reproducing only the remaining sound source data except for the sound source data transmitted to the ISM frequency master terminal among the respective sound source data, the multiple data transmission and reception of the ISM frequency slave terminal, characterized in that for playing the data stored in the reproduction buffer Way.

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