WO2014017704A1

WO2014017704A1 - System and method for controlling data transmission

Info

Publication number: WO2014017704A1
Application number: PCT/KR2012/010014
Authority: WO
Inventors: 송형준
Original assignee: 주식회사 케이티
Priority date: 2012-07-27
Filing date: 2012-11-26
Publication date: 2014-01-30
Also published as: KR101502149B1; KR20140015002A

Abstract

To control data transmission in an environment in which one or more digital units and one or more radio units are linked, a system for controlling data transmission receives traffic state information respectively transmitted from the one or more radio units when each wireless signal is received from the one or more digital units and is converted into one digital signal. On the basis of the received traffic state information, one digital signal which is to be transmitted to the one or more radio units is compressed such that a compressed digital signal is generated, and the compressed digital signal is transmitted to the one or more radio units.

Description

Data transmission control system and method

The present invention relates to a data transmission control system and method.

In the next generation mobile communication system, small cell deployment is a major research topic for increasing wireless data capacity. The small cell is a method of building an existing wireless network for securing coverage and separately establishing a hot spot area that requires a lot of wireless data capacity.

In such a structure, there is a need for operational convenience and real-time control such as interference problem management and resource allocation between the existing macro base station and the small cell base station. To this end, a cloud-type base station construction method is being developed that separates a digital unit (DU) for processing a digital signal and a radio unit (RU) for processing a radio signal.

The digital unit-radio unit separation construction method installs a digital unit for processing a digital signal in a central office and connects the radio unit through a light path. By implementing such a structure, the interference problem of the radio unit boundary region can be solved through monitoring, and the service connection persistence of the terminal can be provided when the terminal moves between radio units. In addition, by controlling the allocation of radio communication resources for each radio unit in real time, it is possible to improve the resource utilization of the construction network.

When constructing a base station with a separate digital unit-radio unit, a WDM (Wavelength Division Multiplexing) scheme is widely used to increase the capacity between the digital unit and the radio unit. This is a method of transmitting a plurality of optical signals having different lengths of wavelengths to a single light beam so that the signals do not overlap, and the capacity can be increased in proportion to the number of wavelengths transmitted by multiplexing.

WDM technology for increasing the capacity between digital units and radio units is added in proportion to the number of wavelengths in a practical implementation. The price of this equipment increases exponentially with the number of light wavelengths used, and the size of the equipment increases, so only a small number of light wavelengths are available. In addition, since the capacity provided for each radio unit is limited to the number of wavelengths supported by the WDM equipment, data capacity management is limited.

Accordingly, the present invention provides a system and method for controlling data transmission through signal characteristics between a digital unit and a radio unit.

Method for controlling data transmission by the data transmission control system which is one feature of the present invention for achieving the technical problem of the present invention,

The data transmission control system interoperates with one or more digital units and one or more radio units, and receives radio signals from the one or more digital units, respectively, and converts the radio signals into one digital signal; Receiving traffic state information transmitted from each of the one or more radio units; Generating a compressed digital signal by compressing the one digital signal to be transmitted to the one or more radio units based on the received traffic state information; And transmitting the compressed digital signal to the one or more radio units.

The converting into the digital signal may include receiving one or more wireless signals transmitted from the one or more digital units; Merging the one or more radio signals by frequency band to generate as many radio signals as the number of digital units; Digitally converting the wireless signals as many as the merged digital number and generating digital signals as many as the digital units; And generating as many digital signals as the number of digital units into the one digital signal based on a data sequence previously allocated for each digital unit.

Generating the compressed digital signal may include determining a compression rate based on the amount of information to be transmitted to the one or more radio units and the traffic state information; Generating a compression matrix for compressing the one digital signal based on the determined compression ratio; And compressing the one digital signal based on the compression matrix to generate the compressed digital signal.

Generating the compressed digital signal may include: calculating a coarseness for sampling only a band in which the digital signal is transmitted to the one or more radio units; Generating a compression matrix based on the calculated roughness; And generating the compressed digital signal by compressing the one digital signal based on the generated compression matrix.

After the step of transmitting to the radio unit, the radio unit comprises: extracting the compression matrix from the compressed digital signal; And retrieving the compressed data by finding the roughness from the extracted compression matrix.

A system for controlling data transmission in conjunction with a plurality of digital units and a plurality of radio units which is another feature of the present invention for achieving the technical problem of the present invention,

A wireless signal merging / separation unit for merging a plurality of radio signals transmitted from the plurality of digital units for each frequency band and generating as many radio signals as the number of the plurality of digital units; An analog / digital converter configured to generate a plurality of digital signals by converting the plurality of radio signals merged for each frequency band in the radio signal merger / separator into digital signals; And generating as many digital signals as the number of digital units converted by the analog / digital converting unit into one digital signal, including compression information about the generated signals in the one digital signal, and compressing the plurality of radio units. And a signal processor for transmitting the compressed digital signal.

The data transmission control system is configured to receive a digital signal equal to the number of digital units converted by the analog / digital conversion unit, generate one digital signal, compress the digital signal, and compress the digital signal. A data sequence allocator for generating data compression information including data sequence information for generating a number of digital signals as one signal; A compression unit compressing the one digital signal based on data compression information generated by the data sequence allocator; And a signal transmitter for transmitting the compressed digital signal compressed by the compression unit to the plurality of radio units.

The compression unit may generate a compression matrix for the digital signal, and convert the digital signal into a coarse signal.

The data transmission control system includes: a signal receiving unit configured to receive a compressed signal to which a data sequence for each radio unit transmitted from the plurality of radio units is allocated; A decompressor for restoring the compressed signal received by the signal receiver; And a data divider for dividing the compressed signal reconstructed by the reconstruction unit for each frequency band and transmitting the divided signals to the plurality of digital units.

The data transmission control system may include a monitoring unit configured to monitor traffic conditions of the plurality of radio units based on the traffic state information transmitted from the plurality of radio units and to transmit the monitored traffic information to the signal processor.

The signal processor may compress the one digital signal at a different compression rate for each radio unit based on the traffic conditions of the plurality of radio units monitored by the monitoring unit.

The radio unit may include: a data division unit configured to receive a compressed digital signal transmitted from the signal transmitter, split the radio unit into radio units, and extract a compressed data signal to be provided to a plurality of terminals located within a cell area of the radio unit; A reconstruction unit for reconstructing the compressed data signal extracted by the data dividing unit to extract data; And a signal transmitter for transmitting the data extracted by the restoration unit to the plurality of terminals.

The radio unit includes a signal receiving unit for receiving a plurality of signals transmitted from the plurality of terminals, respectively; A compressor for compressing a plurality of signals received by the signal receiver to generate a plurality of compressed signals; And a data sequence generator configured to generate the plurality of compressed signals as one compressed signal and to include the data sequence for each radio unit used to generate the one signal in the one compressed signal and transmit the data sequence to the signal processor. can do.

According to the present invention, data capacity between links can be improved without installing additional equipment in an environment in which the digital unit and the radio unit are separated, and capacity control for each operator can be performed by using digital signal processing.

1 is an exemplary diagram of an environment capable of controlling data transmission according to an embodiment of the present invention.

2 is a structural diagram of a data transmission control system according to an embodiment of the present invention.

3 is a structural diagram of a remote hub unit according to an embodiment of the present invention.

4 is a structural diagram of a signal processor according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a method of controlling data transmission according to an embodiment of the present invention.

6 is a flowchart illustrating a data restoration method according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In the present specification, a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user device (User). It may also refer to an Equipment (UE), an Access Terminal (AT), or the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, and the like.

In the present specification, a base station (BS) is an access point (AP), a radio access station (Radio Access Station, RAS), a Node B (Node B), a base transceiver station (Base Transceiver Station, BTS), MMR ( Mobile Multihop Relay) -BS and the like, and may include all or part of functions such as an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Hereinafter, a system and method for controlling data transmission according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In a macrocell environment, a virtualization system is often present at the upper end of a digital unit in order to share and distribute resources of several digital units. However, in an in-building environment, in order to distribute and share signals output from a plurality of communication companies or digital units providing a plurality of communication services according to the traffic situation of the in-building, as shown in FIG. Remote Hub Unit (200) will be described with an example of being located between the digital unit 100 and the radio unit group 400.

In the exemplary embodiment of the present invention, three digital units 100-1 to 100-3 are connected to the remote hub unit 200 as an example, but the number of digital units can be extended. And a plurality of digital units for a plurality of operators will be described with an example of jointly using one remote hub unit 200.

The remote hub unit 200 controls to increase the capacity by compressing data transmitted to the radio unit 300 after allocating operator-specific data sequences. In this case, one radio unit is a radio unit (hereinafter, referred to as a 'cascade radio unit') 310 to one radio unit 310-1, 320-1, 330-1 and a cascade with a radio unit. -2, 320-2, and 330-2) will be described as an example. The radio unit thus configured is referred to as a radio unit group 310 to 330. In the embodiment of the present invention, three radio unit groups 310 to 330 are described as interworking with the remote hub unit 200 as an example. However, the number of radio unit groups may be extended.

The structure of the remote hub unit 200 interworking with the digital unit 100 and the radio unit groups 310 to 330 in such a network environment will be described with reference to FIG. 2. In the embodiment of the present invention, the structures of the remote hub unit 200 are transmitted through data compression among the structures of the remote hub unit 200, and may include other structures of the remote hub unit 200 generally known. In the embodiment of the present invention, the remote hub unit 200 is also referred to as a data transmission control system, but is not necessarily limited thereto.

2 is a structural diagram of a remote hub unit according to an embodiment of the present invention.

As shown in FIG. 2, the remote hub unit 200 includes a wireless signal merger / separator 210, an analog / digital converter 220, a signal processor 230, and a monitor 240.

The wireless signal merger / separator 210 merges radio signals for each operator frequency band transmitted from a plurality of digital units for each operator. That is, since one service provider can provide a service through a plurality of frequency bands, a plurality of wireless signals inputted for each service provider are merged into one wireless signal.

In the exemplary embodiment of the present invention, since three digital units 100-1 to 100-3 are connected to the remote hub unit 200 by way of example, the merged signal in the wireless signal merging / separating unit 210 is described. Three signals are output. In addition, the operator-specific signals transmitted from the radio unit 300 is received, and the signals are separated into radio signals for each operator band and transmitted to the plurality of digital units 100-1 to 100-3.

The analog / digital converter 220 converts one wireless signal merged by the wireless signal merger / separator 210 into a digital signal. At this time, the radio signals converted into digital signals are generated as many as the digital units 100-1 to 100-3. In addition, the digital signal transmitted from the radio unit 300 is converted into an analog signal and transmitted to the wireless signal merger / separator 210.

The signal processor 230 generates a plurality of digital signals converted into digital signals by the analog / digital converter 220 into one digital signal. The digital signal is compressed. Compression information related to compression is included in the header portion of the digital signal and compressed together.

In this case, the compression rate may be changed according to the traffic state of the radio unit 300, or the digital signal may be compressed at a predetermined compression rate. In addition, when compressing a data signal, it can be compressed by various methods. That is, the compression matrix may be generated and compressed or compressed through a coarse signal conversion method.

The monitoring unit 240 monitors the traffic state of the radio unit 300 based on the traffic state information transmitted from the radio unit 300. In addition, the monitored traffic information is transmitted to the signal processor 230 to determine the compression rate according to the traffic amount of the radio unit 300 when the signal processor 230 compresses the data.

Next, a detailed structure of the signal processor 230 among the structures of the remote hub unit 200 will be described with reference to FIG. 3.

3 is a structural diagram of a signal processor according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the signal processor 230 includes a data sequence allocator 231, a compressor 232, a signal transmitter 233, a signal receiver 234, a reconstructor 235, and a data divider 236. ).

The data sequence allocator 231 receives a plurality of digital signals converted into digital signals from the analog / digital converter 220. In order to generate a plurality of received digital signals as one signal, a data sequence is allocated for each operator, that is, for each of the digital units 100-1 to 100-3.

The data sequence at this time is information indicating at which position to insert a digital signal transmitted by any digital unit among a plurality of digital signals into one signal. The data sequence may be determined in a preset order, or may be arbitrarily determined by the data sequence allocator 231. When determining in a preset order, the radio unit 300 knows the data sequence. However, if the data sequence is arbitrarily determined, the data sequence is included in the data compression information and transmitted to the radio unit 300.

In this case, the data compression information includes not only a data sequence but also compression ratio information. The compression ratio information may be a compression ratio of a digital signal determined by the data sequence allocator 231 based on the traffic state information of the radio unit 300 received from the monitoring unit 240, or may be the same compression ratio preset in all the radio units 300. When transmitting a signal may be a predetermined compression rate.

The compression unit 232 compresses the digital signal generated as one signal based on the data compression information generated by the data sequence assignment unit 231 by a preset compression method. In the exemplary embodiment of the present invention, the compression unit 232 compresses the digital signal using a compression sampling technique. For example, the compression unit 232 compresses the digital signal through a coarse signal conversion method and a compression matrix. It is not necessarily limited to this.

The signal transmitter 233 transmits the digital signal compressed by the compressor 232 to the radio unit 300.

The signal receiver 234 receives the compressed signal transmitted from the plurality of radio unit groups 310 to 330. In this case, the compressed signal is allocated a data sequence for each radio unit and includes information transmitted from the radio unit 300 to the digital unit 100.

The decompression unit 235 restores the compressed signal received by the signal receiving unit 234. In this case, the reconstructor 235 reconstructs the signal using the correlation between the coarseness of the signal and the compression matrix. This will be described later.

The data dividing unit 236 filters and divides the signal restored by the reconstructing unit 235 for each business operator. Then, the data to be divided is transmitted to the A / D converter 200 and then transmitted to the digital unit 100.

Next, a structure of a radio unit forming the radio unit groups 310 to 3330 that interoperate with the remote hub unit 200 will be described with reference to FIG. 4.

4 is a structural diagram of a radio unit according to an embodiment of the present invention.

As shown in FIG. 4, the radio unit 300 includes a data divider 301, a decompressor 302, a signal transmitter 303, a signal receiver 304, a compressor 305, and a data sequence generator. 306.

The data dividing unit 301 receives the compressed digital signal transmitted from the signal transmitting unit 233 of the signal processing unit 230 and divides the data for each radio unit 300. In this case, the signal transmitted from the signal transmitter 233 is generated by compressing signals transmitted to the plurality of radio units 310-1 to 330-2 into one signal and receiving the signal. Extracts a compressed digital signal by dividing only a signal to be used in the radio unit 300 included therein, that is, data.

The decompression unit 302 decompresses the compressed digital signal extracted by the data dividing unit 301. In this case, the reconstruction unit 302 reconstructs the signal by using the correlation between the coarseness of the signal and the compression matrix. This will be described later.

The signal transmitter 303 provides the data restored by the decompression unit 302 to a plurality of terminals located in the cell area formed by the radio unit 300.

The signal receiver 304 receives signals transmitted from a plurality of terminals, and the compressor 305 compresses a plurality of signals received by the signal receiver 304. The method of compressing the signal by the compression unit 305 is the same as that of the compression unit 232 of the signal processing unit 230.

The data sequence generator 306 generates one compressed signal compressed by the compressor 305 as one signal. That is, one radio unit group 310 to 330 has a structure in which two or more radio units 310-1_310-2 to 330-1_330-2 are cascaded, and each radio unit 310-1 to 310-2 is connected. ) Transmits a signal to the digital unit 100, the data sequence generator 306 generates and transmits a plurality of signals that one radio unit group 310 transmits to the digital unit 100 as one signal. do. In this case, the order of inserting signals when generating a plurality of signals as one signal is the same as that of the data sequence allocating unit 231 of the signal processor 230.

That is, the data sequence generator 306 generates a data sequence and inserts the data sequence into a signal. In this case, the data sequence is information indicating at which position to insert the digital signal transmitted by any digital unit among the plurality of digital signals into one signal. The data sequence may be determined in a preset order or may be arbitrarily determined by the data sequence generator 306. When determining in a preset order, the remote hub unit 200 knows the data sequence. However, if the data sequence is arbitrarily determined, it is included in the data compression information and transmitted to the remote hub unit 200.

Here, the data compression information includes not only a data sequence but also compression rate information. The compression ratio information may be a compression ratio of a digital signal determined based on traffic state information of the radio unit 300 that transmits the signal, or may be a compression ratio at the same compression ratio preset and allocated to all the radio units 300.

A method of controlling data transmission through each structure described above will be described with reference to FIGS. 5 and 6.

5 is a flowchart illustrating a method of controlling data transmission according to an embodiment of the present invention, and FIG. 6 is a flowchart illustrating a data restoration method according to an embodiment of the present invention.

In FIG. 5, the data transmission control method in the case of transmitting a signal from the digital unit 100 to the radio unit 300 will be described. However, the method shown in FIG. 5 even in the case of transmitting from the radio unit 300 to the digital unit 100. You can control the data transfer.

As shown in FIG. 5, the wireless signal merger / separator 210 of the remote hub unit 200 transmits from the plurality of digital units 100-1 to 100-3 to which the remote hub unit 200 is connected. When receiving the radio signal, a plurality of radio signals are merged for each of the digital units 100-1 to 100-3.

That is, when the first digital unit 100-1 is described as an example, since the first digital unit 100-1 may use one or more frequency bands, the plurality of radios in the first digital unit 100-1 may be used. The signal can be sent. Therefore, the wireless signal merger / separator 210 generates a plurality of wireless signals as one wireless signal. The analog / digital converting unit 220 converts the wireless signals corresponding to the number of digital units merged by the wireless signal merging / separating unit 210 into digital signals (S100).

The monitoring unit 240 receives traffic state information of the radio unit transmitted from the plurality of radio units 310-1 to 330-2 connected to the remote hub unit 200 (S110). Step S110 may be omitted when the remote hub unit 200 compresses the digital signal by applying the same compression rate to the radio unit groups 310 to 330 regardless of the traffic state of the radio unit.

The data sequence allocator 231 of the signal processor 230 generates a plurality of digital signals converted by the analog / digital converter 220 in one step S100. The compression unit 232 determines a compression rate for compressing the digital signal (S120). The compression rate may be determined to compress at a constant compression rate irrespective of the traffic state of the radio unit 300, or may be determined at a different compression rate according to the traffic state of the radio unit 300. In the embodiment of the present invention will be described with an example that is determined by a different compression rate, but is not necessarily limited to this.

When the compression rate is determined in step S120, the compression unit 232 compresses one digital signal generated by the data sequence allocation unit 231 based on the traffic state information of the radio unit 300 received by the monitoring unit 240. (S130). When the compression unit 232 compresses one digital signal in operation S320, the digital signal may be compressed by various methods. In the embodiment of the present invention, a sparse signal conversion method and a method of generating and compressing a compression matrix are described as an example, but are not necessarily limited thereto.

That is, the compressor 232 converts one digital signal transmitted from the data sequence allocator 231 from the time axis to the frequency axis. In general, when using the coarse signal conversion method, since the signal is converted from the time axis to the frequency axis, the embodiment of the present invention will be described as an example of switching from the time axis to the frequency axis. Can be.

The compression unit 232 compresses the remaining frequency after the signal converted to the frequency axis, leaving only a specific frequency in which the original data exists, and deleting the frequency without the original data through the compression matrix generated by the compression unit 232. This is because, when compressing using only a specific band in which the original data exists, it is easy to control the compression and maintain the compression rate stably.

In this case, the compression matrix may be generated by various methods, and the embodiment is not limited to any one method. However, since the maximum compression ratio is determined according to the data length, generating a compression matrix accordingly may have a maximum compression ratio and a maximum restoration success rate.

Here, the correlation between columns of the optimal compression matrix according to the matrix size has a lower bound as shown in Equation 1 below.

[Equation 1]

Where N is the length of the original data, M is the length of the compressed data, and A is the compression matrix.

The compression unit 232 generates a compression matrix and converts it into a coarse signal, which is already known. Detailed descriptions are omitted in the exemplary embodiment of the present invention. When the compression unit 232 compresses the digital signal by the method described above, the signal transmitter 233 transmits the compressed digital signal to the radio unit 300 (S140).

When data is transmitted in this way, different signal providing capacities may be controlled according to traffic conditions for each radio unit 300.

Meanwhile, a method in which the radio unit 300 receiving the compressed digital signal transmitted in FIG. 5 restores the compressed signal will be described with reference to FIG. 6. In the exemplary embodiment of the present invention, the compressed signal transmitted from the remote hub unit 200 to the radio unit 300 is described as an example, but in the opposite case, that is, from the radio unit 300 to the remote hub unit 200. It can also be applied in case of transmission.

As shown in FIG. 6, when the data division unit 301 of the radio unit 300 receives a compressed digital signal in which a plurality of signals are compressed into one signal, only the compressed digital signal to be used is divided and extracted ( S200). There are several methods for extracting a compressed signal to be used by the radio unit 300 from the compressed digital signal, and embodiments of the present invention are not limited to any one method.

The decompression unit 302 restores the compressed digital signal extracted in S200 (S210 and S220). In the embodiment of the present invention, the method of restoring the compressed signal uses the correlation between the received signal and the compression matrix by using the coarseness of the signal.

That is, a column vector of a number corresponding to the coarseness of the signal is found from the compressed signal extracted by the data dividing unit 301 to restore the present signal. It finds the most correlated column first, finds only the number of columns corresponding to the coarseness, and restores the transmission signal closest to the received signal.

However, since the accuracy of the reconstruction signal may be insufficient, if there is a difference between the number of compression matrices found in the compression matrix and the received signal, the transmission signal may be reconstructed after adding a sequence of transmission signals that may cause the difference. do. In addition, the sequence must be found and compared with the restored signal.

In this case, the signal restored first is L1 norm (

If) is small, it means that the first recovered signal is the most accurately restored signal. However, if the reconstructed signal is larger than the first reconstructed signal, the procedure of reconstructing the transmission signal again after adding columns is performed again. Here, the method for restoring the signal by the restoration unit 320 is already known, and detailed description thereof will be omitted in the exemplary embodiment of the present invention.

When the restoration unit 302 restores the signal in this manner, the signal transmission unit 303 transmits the restored signal to the terminals in the cell area generated by the radio unit 300 to provide services to users. . 5 and 6, a procedure of compressing a signal including data in the remote hub unit 200 and transmitting the signal to the radio unit 300, restoring the signal in the radio unit 300 and providing the signal to the terminal has been described. In addition, the procedure of transmitting from the radio unit 300 to the digital unit 100 through the remote hub unit 200 may be performed in the same manner.

Although the 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 concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims

In the data transmission control system to control the data transmission,

The data transmission control system is interoperable with one or more digital units and one or more radio units,

Receiving wireless signals from the at least one digital unit and converting the radio signals into one digital signal;

Receiving traffic state information transmitted from each of the one or more radio units;

Generating a compressed digital signal by compressing the one digital signal to be transmitted to the one or more radio units based on the received traffic state information; And

Transmitting the compressed digital signal to the one or more radio units

Data transmission control method comprising a.
The method of claim 1,

Converting to the digital signal,

Receiving one or more wireless signals transmitted from the one or more digital units;

Merging the one or more radio signals by frequency band to generate as many radio signals as the number of digital units;

Digitally converting the wireless signals as many as the merged digital number and generating digital signals as many as the digital units; And

Generating as many digital signals as the number of digital units into the one digital signal based on a data sequence previously allocated for each digital unit;

Data transmission control method comprising a.
The method of claim 1,

Generating the compressed digital signal,

Determining a compression rate based on the amount of information to be transmitted to the one or more radio units and the traffic state information;

Generating a compression matrix for compressing the one digital signal based on the determined compression ratio; And

Compressing the one digital signal based on the compression matrix to generate the compressed digital signal

Data transmission control method comprising a.
The method of claim 3,

Generating the compressed digital signal,

Calculating a roughness for sampling only a band in which the digital signal is transmitted to the one or more radio units;

Generating a compression matrix based on the calculated roughness; And

Generating the compressed digital signal by compressing the one digital signal based on the generated compression matrix

Data transmission control method comprising a.
The method of claim 4, wherein

After the step of transmitting to the radio unit,

The radio unit,

Extracting the compression matrix from the compressed digital signal; And

Recovering the compressed data from the extracted compression matrix and restoring the compressed data

Data transmission control method comprising a.
In a system for controlling data transmission in conjunction with a plurality of digital units and a plurality of radio units,

A wireless signal merging / separation unit for merging a plurality of radio signals transmitted from the plurality of digital units for each frequency band and generating as many radio signals as the number of the plurality of digital units;

An analog / digital converter configured to generate a plurality of digital signals by converting the plurality of radio signals merged for each frequency band in the radio signal merger / separator into digital signals; And

As many digital signals as the number of digital units converted by the analog / digital converter are generated as one digital signal, and the compressed information about the generated signals is included in the one digital signal and then compressed to the plurality of radio units. Signal processing unit for transmitting the compressed digital signal

Data transmission control system comprising a.
The method of claim 6,

The data transmission control system,

Receives the digital signals of the plurality of digital units converted by the analog / digital conversion unit and generates one digital signal, and compresses the digital signal and the digital signals of the plurality of digital units. A data sequence allocator configured to generate data compression information including data sequence information generated by a signal of the data sequence;

A compression unit compressing the one digital signal based on data compression information generated by the data sequence allocator; And

A signal transmitter for transmitting the compressed digital signal compressed by the compressor to the plurality of radio units

Data transmission control system comprising a.
The method of claim 7, wherein

The compression unit generates a compression matrix for the digital signal, and converts the digital signal into a coarse signal.
The method of claim 7, wherein

The data transmission control system,

A signal receiver configured to receive a compressed signal to which a data sequence for each radio unit transmitted from the plurality of radio units is allocated;

A decompressor for restoring the compressed signal received by the signal receiver; And

A data dividing unit for dividing the compressed signal restored by the decompression unit by frequency band and transmitting the divided signal to the plurality of digital units

Data transmission control system further comprising.
The method of claim 6,

The data transmission control system,

A monitoring unit for monitoring the traffic conditions of the plurality of radio units based on the traffic state information transmitted from the plurality of radio units, and transferring the monitored traffic information to the signal processor;

Data transmission control system further comprising.
The method of claim 10,

And the signal processing unit compresses the one digital signal at a different compression rate for each radio unit based on traffic conditions of the plurality of radio units monitored by the monitoring unit.
The method of claim 6,

The radio unit,

A data dividing unit for receiving a compressed digital signal transmitted from the signal transmitting unit, dividing the compressed digital signal for each radio unit, and extracting a compressed data signal to be provided to a plurality of terminals located within a cell area of the radio unit;

A reconstruction unit for reconstructing the compressed data signal extracted by the data dividing unit to extract data; And

Signal transmission unit for transmitting the data extracted by the recovery unit to the plurality of terminals

Data transmission control system comprising a.
The method of claim 12,

The radio unit,

A signal receiver which receives a plurality of signals transmitted from the plurality of terminals, respectively;

A compressor for compressing a plurality of signals received by the signal receiver to generate a plurality of compressed signals; And

A data sequence generator for generating the plurality of compressed signals into one compressed signal and including the data sequence for each radio unit used to generate the one signal in the one compressed signal and transmitting the data sequence to the signal processor.

Data transmission control system further comprising.