KR102131809B1 - Base station and control method thereof - Google Patents

Abstract

According to the present invention, the base station is installed by adopting a variable-structured radio communication unit (RU) capable of efficiently changing the cell shape and further adding and changing a frequency band by simply replacing a small radio module (RF module). Disclosed is a method of operating a base station apparatus and a base station apparatus capable of overcoming the limitations of low operating efficiency in terms of cost and time, and the limitation of difficulty in flexible adaptation for frequency band change and addition, and improving base station operational efficiency.

Description

BASE STATION AND CONTROL METHOD THEREOF}

The present invention relates to a base station apparatus of a DU (Digital Unit) and RU (Remote Unit) detachable structure, more specifically, it is possible to efficiently change the cell shape, and further, to add a frequency band only by replacing the radio module and The present invention relates to a base station apparatus and a method of operating a base station apparatus that can improve base station operation efficiency by adopting a variable structure type RU that can be changed.

In order to accommodate the rapidly increasing data usage, mobile communication systems are evolving into a system method with higher frequency efficiency, and as a part, an existing base station apparatus structure in which the configuration of a DU (Digital Unit) and a RU (Remote Unit) is integrated. A structure of a base station apparatus in which a single DU and multiple RUs are matched by separating DUs and RUs has appeared.

However, in the existing DU and RU separated base station apparatuses as described above, since the RU is fixed to support only a single frequency band in hardware, avoidance of interference between cells and increase in cell capacity within the coverage of the base station apparatus is balanced. In order to flexibly change the cell shape to satisfy, it is basically assumed that a plurality of RUs are provided.

As a result, since the existing DU and RU separated base station apparatuses must have a plurality of RUs to change the cell shape within the coverage of the base station apparatus, there is a limitation in that operating efficiency is reduced in terms of base station installation cost and time. .

In addition, in the existing DU and RU separated base station apparatus, since the RU is fixed to support only a single frequency band in hardware, when changing the frequency band of the base station apparatus, the existing RU is separated from the DU and the changed frequency band You must perform a replacement operation to connect the RU supporting DU to DU.

Meanwhile, in order to accommodate the rapidly increasing data usage, the mobile communication system evolves from an existing single frequency band environment to a multi carrier (MC) and carrier aggregation (CA) environment using two or more frequency bands by adding a frequency band. Doing.

However, in the existing DU and RU detachable base station devices, since the RU is fixed in hardware to support only a single frequency band, an additional task of connecting an additional RU supporting an additional frequency band to the DU is performed. must do it.

As a result, the existing DU and RU separated base station apparatus has a limitation in that it is difficult to flexibly accommodate frequency band changes and additions, as well as operating efficiency in terms of base station installation cost and time.

Accordingly, in the present invention, in the base station apparatus of the DU and RU separable structure, the existing limitations are overcome, the cell shape can be efficiently changed, and further, the frequency band can be added and changed only by replacing the radio module. I would like to suggest a way to do it.

The present invention was created in view of the above circumstances, and the object to be reached in the present invention is that of a variable structure type capable of efficiently changing the cell shape and further adding and changing the frequency band by simply replacing the wireless module. By adopting RU, it is to provide a base station apparatus and an operation method of the base station apparatus that can improve the base station operation efficiency.

A base station apparatus according to a first aspect of the present invention for achieving the above object, a base station module; And a wireless communication unit having two or more wireless modules, and transmitting a signal transmitted from the base station module through the two or more wireless modules; The wireless communication unit transmits a signal transmitted from the base station module equally through each of the two or more wireless modules to form a single cell by the signal, and each of the different signals transmitted from the base station module is 2 It operates in any one of the multiple cell modes to form multiple cells by the different signals by transmitting through each of the above wireless modules.

Preferably, the multi-cell mode includes a single frequency band multi-cell mode in which each of the different signals in a single frequency band transmitted from the base station module is transmitted through each of the two or more radio modules, and a different frequency transmitted from the base station module. It may include a multi-frequency band multi-cell mode for transmitting each of the signals in the frequency band through each of the two or more radio modules.

Preferably, when operating in the single cell mode or the single frequency band multiple cell mode, each of the two or more wireless modules provided in the wireless communication unit is a wireless module capable of processing signals in the same single frequency band, and the plurality of When operating in the multiple frequency band cell mode, each of the two or more wireless modules provided in the wireless communication unit may be a wireless module capable of processing signals in different frequency bands.

Preferably, each of the two or more wireless modules has the same structure regardless of the frequency band of a processable signal, and is easily replaced in the wireless communication unit.

A method of operating a base station apparatus according to a second aspect of the present invention for achieving the above object includes: receiving a signal transmitted from a base station module by a wireless communication unit having two or more radio modules; And a single cell mode in which the wireless communication unit transmits a signal transmitted from the base station module identically through each of the two or more wireless modules to form a single cell by the signal, and each of the different signals transmitted from the base station module. And transmitting in each of two or more wireless modules to operate in any one of multiple cell modes to form multiple cells by the different signals.

Preferably, the multi-cell mode includes a single frequency band multi-cell mode in which each of the different signals in a single frequency band transmitted from the base station module is transmitted through each of the two or more radio modules, and a different frequency transmitted from the base station module. It may include a multi-frequency band multi-cell mode for transmitting each of the signals in the frequency band through each of the two or more radio modules.

Accordingly, according to the operating method of the base station apparatus and the base station apparatus according to the present invention, it is possible to efficiently change the cell shape, and furthermore, by adopting a variable structure type RU capable of adding and changing the frequency band only by replacing the radio module. , Overcoming the limitations of low operating efficiency in terms of base station installation cost and time, and the limitation of flexible acceptance for changing and adding frequency bands, derives the effect of improving the efficiency of base station operation.

1 is a block diagram showing a base station apparatus according to a preferred embodiment of the present invention.
2 is a view showing the structure of the RU adopted by the base station apparatus according to the preferred embodiment of the present invention.
3 is an operation flowchart showing a method of operating a base station apparatus according to a preferred embodiment of the present invention.

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

1 is a block diagram showing a base station apparatus according to a preferred embodiment.

As shown in FIG. 1, the base station apparatus 300 of the present invention includes a base station module 100 and a wireless communication unit 200.

Here, the base station module 100 corresponds to one DU in a DU (Digital Unit) and RU (Remote Unit) separate structure.

More specifically, the base station module 100 is connected to an external device (for example, a broadband router) through a backhaul to provide a communication service to a terminal using a single frequency band or two or more frequency bands. It is a module for.

That is, the base station module 100, in the case of downlink, by transmitting a signal of a single frequency band or two or more frequency bands, a signal of a single frequency band or two or more frequency bands in the wireless communication unit 200 connected to itself Wirelessly.

In addition, in the case of uplink, the base station module 100 transmits a signal of a single frequency band or two or more frequency bands received from the wireless communication unit 200 to an external device (for example, a broadband router) through a backhaul.

In other words, the base station module 100 of the base station apparatus 300 using a single frequency band or two or more frequency bands through the wireless communication unit 200 for wirelessly transmitting and receiving a single frequency band or two or more frequency band signals. Communication services such as voice and data can be provided from the coverage to the connected terminal.

The wireless communication unit 200 includes two or more wireless modules 220 as shown in FIG. 1, and transmits signals transmitted from the base station module 100 through two or more wireless modules 220.

That is, the wireless communication unit 200 is a configuration corresponding to one RU in a DU and RU separated structure, and is a function unit that transmits and receives wireless signals to a connected terminal.

The wireless communication unit 200 includes two or more wireless modules 220 as described above.

For example, when the wireless module 1 is described as a representative among two or more wireless modules 220, that is, the wireless modules 1, 2, 3, and 4 as shown in FIG. 1, the wireless module 1 is a base station device ( 300) is a radio module that supports any one single frequency band, that is, an RF module.

Of course, the remaining radio modules 2, 3, and 4 are also RF modules that support any single frequency band among a plurality of frequency bands accommodated by the base station apparatus 300.

At this time, each of the two or more wireless modules 220, it is desirable to have the same structure regardless of the frequency band of the supported signal, that is, the processable signal, it is preferable that the wireless communication unit 200 is easy to replace.

The existing RU adopted in the existing DU and RU separated base station apparatus can be said to be a wireless communication unit in which a radio module, that is, an RF module is fixedly installed in hardware.

For example, when referring to the 2*2 MIMO method generally adopted in the current mobile communication system, in the existing DU and RU separated base station apparatus, the first frequency band is used to support the first frequency band. The two RF modules supported adopt a wireless communication unit (RU) fixedly installed in hardware, and the first frequency band is accommodated by transmitting and receiving signals of the first frequency band in a 2*2 MIMO manner through the two RF modules.

Therefore, in the existing DU and RU separated base station apparatus, when changing the frequency band of the base station apparatus from the first frequency band to the second frequency band, the radio communication unit (RU) of the existing first frequency band is separated from the DU. A replacement operation for connecting the radio communication unit (RU) supporting the second frequency band to the DU must be performed.

In addition, in the existing DU and RU separated type base station apparatus, when it is desired to additionally accommodate the second frequency band in addition to the first frequency band, a wireless communication unit (RU) supporting the added second frequency band is additionally connected to the DU. Must do the expansion work.

As a result, the existing DU and RU separated base station apparatuses have to replace or add the radio communication unit (RU) itself in order to change or add the frequency bands of the base station apparatus, thus reducing the operating efficiency in terms of base station installation cost and time. In addition, it has a limitation in that it is difficult to flexibly accommodate changes and additions to the frequency band.

However, the base station apparatus 300 of the present invention adopts a wireless communication unit 200 having two or more wireless modules 220 which have the same structure and are easy to replace regardless of the supported frequency bands, thereby changing the frequency band and Flexible acceptance is possible for the addition.

For example, in the embodiment in which two wireless modules 1 and 2 are provided as two or more wireless modules 220, referring to the 2*2 MIMO method, in the base station apparatus 300 of the present invention, a plurality of frequency bands In order to support the first frequency band, the operator of the base station apparatus 300 installs the wireless modules 1 and 2 that support the first frequency band in the wireless communication unit 200, and only two wireless modules 1,2 The first frequency band can be accommodated by transmitting/receiving signals in the first frequency band through 2*2 MIMO.

In addition, when changing the frequency band supported by the base station apparatus 300 from the first frequency band to the second frequency band, the operator supports the second frequency band of the wireless modules 1 and 2 installed in the wireless communication unit 200. It is possible to accommodate the second frequency band by transmitting/receiving signals of the second frequency band through 2 wireless modules 1 and 2 in a 2*2 MIMO method through only a simple operation of changing and installing the wireless module 1 and 2.

In addition, in order to additionally accommodate the second frequency band in addition to the first frequency band supported by the base station apparatus 300, the operator may receive two RF modules 3 and 4 supporting the second frequency band in the wireless communication unit 200. By simply installing additionally, the signals of the first frequency band are transmitted/received in 2*2 MIMO manner through two wireless modules 1,2, and the signals of the second frequency band are transmitted through two wireless modules 3/4. By transmitting and receiving in the 2 MIMO method, it is possible to additionally accommodate the second frequency band in addition to the first frequency band.

Therefore, as described above, the base station apparatus 300 of the present invention is provided with two or more wireless modules 220 having the same structure regardless of the frequency bands supported. By adopting ), the existing wireless communication unit (RU) itself must be replaced or added, thereby overcoming the limitations in terms of base station installation cost and time, and the difficulty in flexible acceptance for frequency band change and addition. .

On the other hand, furthermore, the base station apparatus 300 of the present invention is based on the wireless communication unit 200 (hereinafter, referred to as a variable-structured wireless communication unit 200) having a structural feature as described above, and efficiently forms a cell shape. Can be changed.

The wireless communication unit 200 of the present invention, that is, one RU 200, transmits the signals transmitted from the base station module 100 through the two or more wireless modules 220 in the same manner to form a single cell by the signal. Single cell mode, each of the different signals transmitted from the base station module 100 is transmitted through each of two or more wireless modules 220 to operate in any one of multiple cell modes to form multiple cells by the different signals. have.

Here, the multiple cell mode described above includes a single frequency band multi-cell mode for transmitting each of the different signals in a single frequency band transmitted from the base station module 100 through each of two or more wireless modules 220, and the base station module 100 ) May include a multi-frequency multi-cell mode in which each of signals of different frequency bands transmitted from) is transmitted through each of two or more wireless modules 220.

Hereinafter, the wireless communication unit 200 adopted by the base station apparatus according to the preferred embodiment of the present invention will be described in more detail with reference to FIG. 2, that is, the wireless communication unit 200 of a variable structure type.

As shown in FIG. 2, the variable structure type wireless communication unit 200 proposed by the present invention includes a signal processing block 210, two or more wireless modules 220, and two or more antennas.

Here, four wireless modules 1, 2, 3, 4 are provided as two or more wireless modules 220, and ANT1, 2, 3, 4 are provided as two or more antennas so as to be described as an example. .

Before describing in detail the configuration of changing the cell shape in the variable-structured wireless communication unit 200, each configuration in the variable-structured wireless communication unit 200 will be briefly described.

The signal processing block 210 processes the downlink signal transmitted from the base station module 100 to be transmitted to two or more wireless modules 220, that is, each wireless module 1, 2, 3, 4, and each wireless module 1 It is a block to process the uplink signal received from ,2,3,4 to transmit to the base station module 100. The signal processing block 210 may perform D/A conversion on a downlink signal and then up-convert it and reversely process an uplink signal.

The two or more wireless modules 220 are provided with two or more wireless modules 220, ie, each wireless module 1, 2, 3, 4, as described above.

For example, when referring to the wireless module 1 as a representative description, the wireless module 1 is a radio that supports any one single frequency band (for example, the first frequency band) among a plurality of frequency bands accommodated by the base station apparatus 300. It is a module, or RF module.

2, the wireless module 1 includes AMP and LNA for amplifying and processing downlink signals and uplink signals, and a duplexer for separating and filtering downlink and uplink signals. can do.

Of course, the remaining radio modules 2, 3, and 4 are also RF modules that support any single frequency band among a plurality of frequency bands that can be accommodated by the base station apparatus 300, and AMP and LNA are the same as those of the radio module 1 described above. , It may include a duplexer.

At this time, each of the two or more wireless modules 220, it is desirable to have the same structure regardless of the frequency band of the supported signal, that is, the processable signal, it is preferable that the wireless communication unit 200 is easy to replace.

Accordingly, the configuration of changing the cell shape through the wireless communication unit 200 of the variable structure type in the base station apparatus 300 will be described in detail as follows.

First, two or more radios in the wireless communication unit 200 of the base station apparatus 300, the operator of the base station apparatus 300, which determines whether to operate to accommodate a single frequency band or to operate to accommodate multiple frequency bands The module will be replaced and set.

For example, when operating to accommodate a single frequency band (eg, the first frequency band), wireless modules 1, 2, 3, and 4 that support the first frequency band are set in the wireless communication unit 200. will be.

As described above, in the wireless communication unit 200 provided with the wireless modules 1, 2, 3, and 4 supporting a single first frequency band, signals transmitted from the base station module 100 are transmitted through each of two or more wireless modules 220. It is possible to operate in a single cell mode in which a single cell is formed by the same signal by transmitting the same.

To correspond to the above-described example, the case where the wireless communication unit 200 operates in a single cell mode by referring to the 2*2 MIMO method is as follows.

In this case, in the 1*1 MIMO method, each of the two or more wireless modules 220 may mean each of the wireless modules 1, 2, 3, and 4, respectively.

However, if it is based on the 2*2 MIMO method, each of the two or more wireless modules 220 set in the present invention is a wireless which is bundled and transmitted and received according to the 2*2 MIMO method among the wireless modules 1, 2, 3, and 4 It means a module unit. For example, the wireless modules 1 and 2 can be viewed as one wireless module unit and the wireless modules 3 and 4 can be viewed as one wireless module unit.

First, when operating in a single cell mode, a signal according to the 2*2 MIMO method from the base station module 100, that is, 2T2R 1Cell signals in the form of two data streams will be transmitted to the wireless communication unit 200. Of course, the signal of the 2T2R 1Cell received at this time will be a signal of the first frequency band.

Accordingly, the signal of the 2T2R 1Cell transmitted from the base station module 100 is transmitted to the wireless modules 1 and 2 in the wireless communication unit 200 according to a predetermined signal path, amplified through the wireless modules 1,2, and then ANT1, It will be transmitted in 2*2 MIMO manner through 2.

In addition, as shown in FIG. 2, in the wireless modules 3 and 4 in the wireless communication unit 200, the signals of the 2T2R 1Cell transmitted from the base station module 100 to the wireless modules 1 and 2 are acquired by a method such as copying or bypassing. After the amplification process, it is possible to transmit the same signal as the wireless modules 1 and 2 by transmitting in a 2*2 MIMO method via ANT3,4.

Meanwhile, the wireless communication unit 200 will inversely process the process of processing the above-described downlink signal, that is, the 2T2R 1Cell signal, for the uplink signal and transmit it to the base station module 100.

As described above, when the wireless communication unit 200 of the present invention operates in a single cell mode, a signal transmitted from the base station module 100, for example, in the case of a 2*2 MIMO method, signals of 2T2R 1Cell 2 or more wireless modules 220, respectively, The same is transmitted through the wireless modules 1, 2 and 3, 4, and the signals received from the wireless, that is, the signals of the 2T2R 1 cell, are transmitted to the base station module 100 through the wireless modules 1, 2 and 3,4. By transmitting, eventually, the base station apparatus 300 may form a single cell in a single frequency band by signals transmitted and received through the wireless modules 1 and 2 and the wireless modules 3 and 4 in the same manner.

As described above, when the wireless communication unit 200 operates in a single cell mode to form a single cell in the base station apparatus 300, instead of reducing the cell capacity, the effect of avoiding interference between cells increases, and one 2T2R is used. In other words, as compared with the conventional method of forming 1 cell using only the wireless modules 1 and 2, since the EIRP (Effective Isotropically Radiated Power) side output is increased, the effect of increasing the coverage of the base station apparatus 300 can be expected.

On the other hand, as described above, in the wireless communication unit 200 provided with the wireless modules 1, 2, 3, and 4 supporting a single first frequency band, among the multiple cell modes described above, the wireless communication unit 200 may operate in a single frequency band multiple cell mode. .

To correspond to the above-described example, the case where the wireless communication unit 200 operates in a single frequency band multiple cell mode by referring to the 2*2 MIMO method is as follows.

First, when operating in a single frequency band multiple cell mode, different 2T2R 2Cell signals according to a 2*2 MIMO method from the base station module 100, for example, signal A of 2T2R 1Cell and signal B of 2T2R 1Cell to wireless communication unit 200 Can be sent. Of course, different signals A and B of the 2T2R 2Cell received at this time may be signals in the first frequency band.

Accordingly, the signal A of the 2T2R 1Cell transmitted from the base station module 100 is transmitted to the wireless modules 1 and 2 in the wireless communication unit 200 according to a predetermined signal path, amplified through the wireless modules 1,2, and then ANT1 It will be transmitted in 2*2 MIMO manner through ,2.

In addition, the signal B of the 2T2R 1Cell transmitted from the base station module 100 is transmitted to the wireless modules 3 and 4 in the wireless communication unit 200 according to a predetermined signal path, amplified through the wireless modules 3 and 4, and then ANT3 It will be transmitted in 2*2 MIMO method via ,4.

Meanwhile, the wireless communication unit 200 will reversely process the above-described downlink signal, that is, the process of processing the signals A and B of the 2T2R 2Cell for the uplink signal and transmit it to the base station module 100.

As described above, when the wireless communication unit 200 of the present invention operates in a single frequency band multiple cell mode, different signals such as 2*2 MIMO in a single frequency band (for example, the first frequency band) transmitted from the base station module 100 In the case of the system, different signals A and B of 2T2R 2Cell are transmitted through each of two or more wireless modules 220, that is, wireless modules 1 and 2 and wireless modules 3 and 4, respectively, and signals that are differently received from the radio, that is, signals of 2T2R 2Cell By transmitting A and B to the base station module 100 through the wireless modules 1 and 2 and the wireless modules 3 and 4, in the end, the base station apparatus 300 transmits and receives differently through the wireless modules 1 and 2 and the wireless modules 3 and 4 The signals A and B can form a plurality of cells in a single frequency band (2 cells).

As described above, when the wireless communication unit 200 operates in the single frequency band multiple cell mode to form the single frequency band multiple cells in the base station apparatus 300, the effect of avoiding interference between cells is reduced, but the cell capacity can be increased. The effect can be elicited.

On the other hand, for example, when operating to accommodate a plurality of frequency bands (eg, a first frequency band, a second frequency band), the wireless communication unit 200 includes wireless modules 1 and 2 that support the first frequency band. Wireless modules 3 and 4 supporting the second frequency band will be set.

As described above, in the wireless communication unit 200 provided with the wireless modules 1 and 2 supporting the first frequency band and the wireless modules 3 and 4 supporting the second frequency band, among the multiple cell modes described above, the multiple frequency band multiple cell mode is selected. It can work.

To correspond to the above-described example, the case where the wireless communication unit 200 operates in the multiple frequency band multiple cell mode by referring to the 2*2 MIMO method is as follows.

First, when operating in the multi-frequency band multi-cell mode, each of the signals of different frequency bands according to the 2*2 MIMO method from the base station module 100, that is, the signal C and the second frequency band of the 2T2R 1Cell of the first frequency band The signal D of 2T2R 1Cell will be transmitted to the wireless communication unit 200.

Accordingly, the signal C of the 2T2R 1Cell of the first frequency band transmitted from the base station module 100 is transmitted to the wireless modules 1 and 2 in the wireless communication unit 200 according to a predetermined signal path, and through the wireless modules 1 and 2 After amplification, it will be transmitted in 2*2 MIMO manner through ANT1,2.

In addition, the signal D of the 2T2R 1Cell of the second frequency band transmitted from the base station module 100 is transmitted to the wireless modules 3 and 4 in the wireless communication unit 200 according to a predetermined signal path, and through the wireless modules 3 and 4 After amplification, it will be transmitted in 2*2 MIMO method through ANT3,4.

Meanwhile, the wireless communication unit 200 reverses the process of processing the downlink signal, that is, the signal C of 2T2R 1Cell in the first frequency band and the signal D of 2T2R 1Cell in the second frequency band for the uplink signal. It will be processed and transmitted to the base station module 100.

As described above, when the wireless communication unit 200 of the present invention operates in the multiple frequency band multiple cell mode, signals of different frequency bands transmitted from the base station module 100, for example, 2*2 MIMO, 2T2R 1Cell of the first frequency band Signals C and 2T2R 1Cell in the second frequency band are transmitted through each of two or more wireless modules 220, i.e., wireless modules 1,2, and wireless modules 3,4, respectively. By transmitting the signal C of the 2T2R 1Cell of the 1 frequency band and the signal D of the 2T2R 1Cell of the 2nd frequency band to the base station module 100 through the wireless modules 1, 2 and the wireless modules 3, 4, eventually the base station apparatus 300 By using signals A and B differently transmitted and received through the wireless modules 1 and 2 and the wireless modules 3 and 4, it is possible to form multiple cells (2 cells) of the multiple frequency bands, that is, 1 cell of the first frequency band and 1 cell of the second frequency band. have.

As described above, when the wireless communication unit 200 operates in the multi-frequency band multi-cell mode to form the multi-frequency band multi-cell in the base station apparatus 300, the effect of avoiding inter-cell interference and increasing the cell capacity can be expected.

As described above, the base station apparatus 300 of the present invention is based on the variable-structured wireless communication unit 200, without replacing or adding the wireless communication unit 200 itself, that is, the RU itself, a single cell shape. It is possible to efficiently change to a cell or a single frequency band multiple cell or a multiple frequency band multiple cell.

Here, changing the cell shape in the base station apparatus 300, that is, determining the operation mode of the wireless communication unit 200, may be performed by manual control by the operator or remote control by the operator.

In particular, determining (changing) the operation mode of the wireless communication unit 200 in the base station apparatus 300 to any one of a single cell mode and a single frequency band multi-cell mode is a manual control by an operator or a long distance by an operator It may be subject to radio control, or may be automatically determined according to the situation in consideration of the amount of traffic identified in the base station module 100 and the number of access terminals connected to the base station apparatus 300.

For example, in the base station apparatus 300, if the traffic amount or the number of access terminals is greater than or equal to a predetermined threshold level, the base station apparatus 300 determines to operate in a single frequency band multi-cell mode to obtain an effect of increasing the cell capacity, and the traffic amount or the number of access terminals is predetermined If the level is not higher than the level, it may be determined to operate in a single cell mode in order to obtain an effect of avoiding interference between cells and an effect of expanding the coverage of the base station apparatus 300.

On the other hand, the current mobile communication system generally adopts a 2*2 MIMO method, but may be evolved into a 4*4 MIMO method or a more N*N MIMO method according to future technological development, or evolved from a mobile communication system. If, for example, the N*N MIMO scheme is adopted, the RU for NTNR to support the N*N MIMO scheme should be developed and replaced.

However, the base station apparatus 300 of the present invention adopts a variable structure type wireless communication unit 200 having a plurality of wireless modules having the same structure as described above, and thus evolved N*N without additional RU development or RU replacement. It is expected to be able to flexibly support the MIMO method.

Referring to FIG. 2, when the wireless communication unit 200 supports N*N MIMO, for example, 4*4 MIMO, it is as follows.

First, for convenience of description, a case where N radio modules, i.e., radio modules 1, 2, 3, and 4, are provided as two or more radio modules 220 as described above will be described.

At this time, in the single cell mode of the 2*2 MIMO method as described above, a signal according to the 2*2 MIMO method, that is, a 2T2R 1Cell signal in the form of two data streams, is transmitted from the base station module 100 to the wireless communication unit 200.

On the other hand, in the single cell mode of N*N MIMO, for example, 4*4 MIMO, the signal according to the 4*4 MIMO method from the base station module 100, that is, the signal of 4T4R 1Cell in the form of 4 (N) data streams is wireless. It may be transmitted to the communication unit 200. Of course, the signal of the 4T4R 1Cell received at this time will be a signal of a single frequency band, for example, the first frequency band.

Accordingly, the signal of the 4T4R 1Cell transmitted from the base station module 100 is transmitted to the wireless modules 1, 2, 3, 4 in the wireless communication unit 200 according to a predetermined signal path, and the wireless modules 1, 2, 3, 4 After amplification processing through ANT1,2,3,4, it will be transmitted in 4*4 MIMO method.

On the other hand, the wireless communication unit 200 will process the process of processing the above-described downlink signal, that is, the 4T4R 1Cell signal for the uplink signal, and transmits it to the base station module 100.

As described above, when the wireless communication unit 200 of the present invention operates in a single cell mode, a signal transmitted from the base station module 100, such as a 4*4 MIMO method, transmits 4T4R 1Cell signals to two or more wireless modules 220, that is, wireless Transmitting through the modules 1, 2, 3, and 4, the same signal received from the radio, that is, the signal of the 4T4R 1Cell, is transmitted to the base station module 100 through the radio modules 1, 2, 3, 4, which eventually results in the base station device ( In 300), signals can be transmitted/received in a 4*4 MIMO manner through wireless modules 1, 2, 3, and 4.

As described above, the base station apparatus according to the present invention is capable of efficiently changing the cell shape, and furthermore, a variable structure type wireless communication unit capable of adding and changing a frequency band by simply replacing a small radio module (RF module) ( By adopting RU), it overcomes the limitations in which operating efficiency is low in terms of base station installation cost and time, and the limitation in that flexible acceptance is difficult for frequency band change and addition, and derives an effect that can improve the efficiency of base station operation.

Hereinafter, an operation flow of an operation method of a base station apparatus according to a preferred embodiment of the present invention will be described with reference to FIG. 3. For convenience of description, reference will be made to reference numerals in FIGS. 1 and 2.

The operation method of the base station apparatus 300 according to the present invention follows the operation of the base station apparatus employing the variable type wireless communication unit 200 having two or more radio modules (RF modules) as described above.

An operator of the base station apparatus 300 who has decided whether to operate to accommodate a single frequency band or to operate to accommodate a plurality of frequency bands, may use two or more wireless modules in the wireless communication unit 200 of the base station apparatus 300. It will be replaced and set.

Thus, in the operation method of the base station apparatus 300 according to the present invention, when operating to accommodate a single frequency band (eg, the first frequency band), the wireless communication unit 200 supports the first frequency band. The wireless modules 1, 2, 3, and 4 will be set (S100).

On the other hand, in the operation method of the base station apparatus 300 according to the present invention, when operating to accommodate a plurality of frequency bands (for example, the first frequency band, the second frequency band), the first in the wireless communication unit 200 The wireless modules 1 and 2 supporting the frequency band and the wireless modules 3 and 4 supporting the second frequency band will be set (S100).

In addition, in the operation method of the base station apparatus 300 according to the present invention, the operation mode of the wireless communication unit 200 is determined to be one of a single cell mode, a single frequency band multiple cell mode, or a multiple frequency band multiple cell mode ( S110).

At this time, determining the operation mode of the wireless communication unit 200 in step S110, that is, changing the cell shape, may be in accordance with manual control by the operator or remote control by the operator.

Further, determining (changing) the operation mode of the wireless communication unit 200 to any one of a single cell mode and a single frequency band multiple cell mode may be performed by manual control by an operator or remote wireless control by an operator. , It may be determined automatically according to the situation in consideration of the amount of traffic identified in the base station module 100 and the number of access terminals connected to the base station apparatus 300.

In the operation method of the base station apparatus 300 according to the present invention, when the operation mode of the wireless communication unit 200 is determined in step S110, a single cell, a single frequency band multiple cell by the wireless communication unit 200 operating in the determined operation mode , It is possible to form a cell having a shape of any one of the multiple frequency band multiple cells.

Hereinafter, a 2*2 MIMO method will be described and described.

For example, in the operation method of the base station apparatus 300 according to the present invention, if the operation mode of the wireless communication unit 200 is determined to be a single cell mode (S120 Yes), the signal of 2T2R 1Cell from the base station module 100 is wireless. It will be transmitted to the communication unit 200. Of course, the signal of the 2T2R 1Cell received at this time will be a signal of a single frequency band (eg, the first frequency band).

Thus, in the operation method of the base station apparatus 300 according to the present invention, the signal of the 2T2R 1Cell transmitted from the base station module 100 is transmitted to the wireless modules 1 and 2 in the wireless communication unit 200 according to a predetermined signal path, After being amplified through the wireless modules 1 and 2, it will be transmitted in a 2*2 MIMO manner through ANT1 and 2.

In addition, in the operation method of the base station apparatus 300 according to the present invention, the radio modules 3 and 4 in the radio communication unit 200 copy the signal of the 2T2R 1Cell transmitted from the base station module 100 to the radio modules 1 or 2, or By acquiring by a bypass method, amplifying, and transmitting the 2*2 MIMO method through ANT3,4, the same signal as that of the wireless modules 1 and 2 can be transmitted.

As described above, in the operation method of the base station apparatus 300 according to the present invention, when operating in a single cell mode, a signal transmitted from the base station module 100, for example, a 2T2R 1Cell signal in the case of a 2*2 MIMO method, has two or more radio modules. (220) respectively, that is, by transmitting the same through the wireless module 1,2 and wireless modules 3, 4, in the end, the base station apparatus 300 by the same signal transmitted through the wireless modules 1, 2 and the wireless modules 3, 4 A single cell in a single frequency band (1 Cell) may be formed (S130).

Meanwhile, in the operation method of the base station apparatus 300 according to the present invention, if the operation mode of the wireless communication unit 200 is not determined as a single cell mode (S120 No), but is determined as a single frequency band multiple cell mode (S140 Yes) , Different signals of 2T2R 2Cell from the base station module 100, that is, signals A of 2T2R 1Cell and signals B of 2T2R 1Cell will be transmitted to the wireless communication unit 200. Of course, the different signals A and B of the 2T2R 2Cell received at this time will be signals in the first frequency band.

Accordingly, in the operation method of the base station apparatus 300 according to the present invention, the signal AR of the 2T2R 1Cell transmitted from the base station module 100 is transmitted to the radio modules 1 and 2 in the radio communication unit 200 according to a predetermined signal path. It will be amplified through wireless modules 1 and 2, and then transmitted through 2*2 MIMO through ANT1 and 2.

In addition, in the operation method of the base station apparatus 300 according to the present invention, the signal B of the 2T2R 1Cell transmitted from the base station module 100 is transmitted to the wireless modules 3 and 4 in the wireless communication unit 200 according to a predetermined signal path. It will be amplified through wireless modules 3 and 4, and then transmitted in 2*2 MIMO method through ANT3 and 4.

As described above, in the operation method of the base station apparatus 300 according to the present invention, when operating in the single frequency band multiple cell mode, different signals in a single frequency band (eg, the first frequency band) transmitted from the base station module 100 For example, in the case of a 2*2 MIMO method, by transmitting different signals A and B of 2T2R 2Cell through each of two or more radio modules 220, that is, radio modules 1,2 and radio modules 3 and 4, respectively, eventually the base station apparatus 300 Multiple cells 2Cell of a single frequency band may be formed by signals A and B transmitted differently through the wireless modules 1 and 2 and the wireless modules 3 and 4 (S150).

On the other hand, in the operation method of the base station apparatus 300 according to the present invention, if the operation mode of the wireless communication unit 200 is determined as a multiple frequency band multiple cell mode (S140 No), signals of different frequency bands from the base station module 100 Each, that is, the signal C of the 2T2R 1Cell of the first frequency band and the signal D of the 2T2R 1Cell of the second frequency band will be transmitted to the wireless communication unit 200.

Accordingly, in the operation method of the base station apparatus 300 according to the present invention, the signal C of the 2T2R 1Cell of the first frequency band transmitted from the base station module 100 is a wireless module in the wireless communication unit 200 according to a predetermined signal path. It is transmitted to 1,2, and amplified through wireless modules 1 and 2, and then transmitted through 2*2 MIMO through ANT1 and 2.

In addition, in the operation method of the base station apparatus 300 according to the present invention, the signal D of the 2T2R 1Cell of the second frequency band transmitted from the base station module 100 is a wireless module in the wireless communication unit 200 according to a predetermined signal path. It will be transmitted to 3, 4, and amplified through the wireless modules 3 and 4, and then transmitted through 2*2 MIMO through ANT3 and 4.

As described above, in the operation method of the base station apparatus 300 according to the present invention, when operating in the multi-frequency band multi-cell mode, the signals of different frequency bands transmitted from the base station module 100, for example, in the case of a 2*2 MIMO method, are first By transmitting the signal C of the 2T2R 1Cell of the frequency band and the signal D of the 2T2R 1Cell of the second frequency band through each of the two or more wireless modules 220, that is, the wireless modules 1,2, and the wireless modules 3,4, respectively, the base station device ( In 300), multiple cells (2 cells) in the multiple frequency band, that is, 1 cell in the first frequency band and 1 cell in the second frequency band, are generated by signals A and B transmitted differently through the wireless modules 1 and 2 and the wireless modules 3 and 4. It can be formed (S160).

As described above, according to the operating method of the base station apparatus according to the present invention, it is possible to efficiently change the cell shape and further add and change the frequency band by simply replacing the small radio module (RF module). By adopting a variable-structured wireless communication unit (RU), it overcomes the limitations of low operational efficiency in terms of base station installation cost and time, and the limitation of flexible acceptance for frequency band changes and additions, and improves base station operational efficiency. To derive.

The present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above-described embodiments, and the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims below. Anyone with ordinary knowledge in the technical idea of the present invention extends to the extent that various modifications or modifications are possible.

According to the operating method of the base station apparatus and the base station apparatus according to the present invention, it is possible to efficiently change the cell shape, and furthermore, by adopting a variable-structured RU capable of adding and changing the frequency band by simply replacing the radio module, the base station In that it can improve operational efficiency, as it exceeds the limitations of existing technologies, it is not only the use of related technologies, but also the possibility of commercially available or commercially available devices, as well as the degree to which they can be practiced realistically, making it industrial. It is a possible invention.

300: base station device
100: base station module 200: wireless communication unit
220: 2 or more wireless modules

Claims (6)

Base station module; And
It includes two or more wireless modules, and includes a variable type wireless communication unit for transmitting a signal transmitted from the base station module through the two or more wireless modules;
The wireless communication unit,
A single cell mode in which a signal transmitted from the base station module is identically transmitted through each of the two or more radio modules to form a single cell by the signal, and each of the two or more radio modules each of a different signal transmitted from the base station module Transmits through and operates in any one of the multiple cell modes to form multiple cells by the different signals,
When operating in the single cell mode, the wireless communication unit includes two or more wireless modules capable of signal processing in the same single frequency band,
When operating in the multi-cell mode, the wireless communication unit includes two or more wireless modules capable of signal processing in the same single frequency band or two or more wireless modules capable of signal processing in different frequency bands. Base station apparatus to be made. According to claim 1,
The multiple cell mode,
Single frequency band multi-cell mode for transmitting each of the different signals in a single frequency band transmitted from the base station module through each of the two or more wireless modules, and each of the signals of different frequency bands transmitted from the base station module to the two or more radios A base station apparatus comprising a multiple frequency band multiple cell mode transmitted through each module. According to claim 2,
When operating in the single cell mode or the single frequency band multiple cell mode, each of the two or more wireless modules provided in the wireless communication unit is a wireless module capable of processing signals of the same single frequency band.
When operating in the multiple frequency band multiple cell mode, each of the two or more wireless modules provided in the wireless communication unit is a base station apparatus characterized in that it is a wireless module capable of processing signals in different frequency bands. According to claim 1,
Each of the two or more wireless modules,
A base station apparatus having the same structure irrespective of the frequency band of a processable signal, and easy replacement in the wireless communication unit. A variable-structured wireless communication unit having two or more wireless modules, receiving a signal transmitted from a base station module; And
The wireless communication unit transmits a signal transmitted from the base station module equally through each of the two or more wireless modules to form a single cell by the signal, and each of the different signals transmitted from the base station module is 2 It includes a step of operating in any one of a plurality of cell mode to form a plurality of cells by the different signals by transmitting through each of the above radio module,
When operating in the single cell mode, the wireless communication unit includes two or more wireless modules capable of signal processing in the same single frequency band,
When operating in the multi-cell mode, the wireless communication unit includes two or more wireless modules capable of signal processing in the same single frequency band or two or more wireless modules capable of signal processing in different frequency bands. How to operate the base station device. The method of claim 5,
The multiple cell mode,
Single frequency band multi-cell mode for transmitting each of the different signals in a single frequency band transmitted from the base station module through each of the two or more wireless modules, and each of the signals of different frequency bands transmitted from the base station module to the two or more radios And a multiple frequency band multiple cell mode transmitted through each of the modules.

Images