KR20120060627A - System and method for realizing semi-static clustering for cooperation transmission between base stations, and apparatus applied to the same - Google Patents

Abstract

PURPOSE: A semi-fixed clustering realization system for cooperation transmission between base stations, method, and apparatus thereof are provided to solve interference problems for a cell boundary or a cluster boundary by increasing chances of the cooperation transmission between the base stations. CONSTITUTION: A base station apparatus(100) changes a sector into a right-handed screw or a left-handed screw in order to allocate common frequency band of plural sectors. The base station apparatus changes a cell of a cooperation transmission section and a cluster. In case a user terminal(200) locates an inter-cell boundary section of the cluster, the user terminal transmits data through cooperation transmission between base stations.

Description

System and method for implementing semi-fixed clustering for cooperative transmission between base stations, and apparatus applied thereto

The present invention relates to a semi-fixed clustering implementation system and method for cooperative transmission between base stations, and an apparatus applied thereto. More particularly, the present invention provides a data transmission service according to a newly proposed clustering scheme for cooperative transmission between base stations. The present invention relates to a semi-fixed clustering implementation system and method for cooperative transmission between base stations to easily overcome interference occurring at a cell boundary or a cluster boundary, and an apparatus applied thereto.

Typically, a set of base stations for cooperative transmission, that is, a cluster configuration, may be classified into static clustering, semi-static clustering, and dynamic clustering according to an implementation method.

1 illustrates an example of a static clustering structure, wherein an inner cell region uses a common frequency band, and an outer cell region reuses three frequency bands and configures three cells into one cluster.

Based on static clustering, users can selectively use coordinated static clustering (CS) and joint transmission (JT) based on the user's signal to interference-plus-noise ratio (SINR). There have been suggestions for improving the data rate.

However, the above technique does not overcome the limitations of the performance improvement due to interference of adjacent clusters when there are users at the cluster boundary, and the performance improvement is limited because the opportunity of cooperative transmission is reduced.

In addition, based on semi-static clustering, the complexity of allocating frequency bands between clusters when the cluster is overlapping increases the efficiency of using the frequency band. There is a problem.

In cooperative transmission in dynamic clustering, clusters are preferentially configured by a user's preferred cell so that the data rate of the user can be maximized among the candidate cells for the cluster around the user's serving cell.

Therefore, in order to configure such a cluster, signal overhead and implementation complexity are increased, and due to overlapping between clusters such as semi-static clustering, each cell of radio resources is allocated. Ping-pong effects can occur that cause frequent hand-offs to the user.

There is a need for a separate solution to overcome these problems.

Accordingly, the present invention was created to solve the above problems, and an object of the present invention is to newly propose a clustering scheme for cooperative transmission between base stations, and to generate interference at a cell boundary or a cluster boundary for providing a data transmission service. The present invention provides a semi-fixed clustering implementation system and method for cooperative transmission between base stations to easily overcome the problem, and an apparatus applied thereto.

In addition, the present invention provides a semi-fixed clustering implementation system and method for cooperative transmission between base stations to solve the interference problem on the cell boundary or cluster boundary by increasing the chance of cooperative transmission between base stations and to implement it as a system of low complexity, and It is to provide an apparatus applied thereto.

A semi-fixed clustering implementation system for cooperative transmission between base stations according to the first aspect of the present invention for achieving the above object is included in at least one other base station cell adjacent to a sector of a base station cell assigned a common frequency band. Form a cluster, which is a cell of base station devices sharing a cell of a cooperative transmission interval between base stations consisting of sectors of a common frequency band, and clock or counter clock a sector for allocating the common frequency band among a plurality of sectors constituting the base station cell. In the case of being located in the boundary section between the cell of the cooperative transmission interval between the base stations and the cell and the cluster of the cluster and the cell of the cluster to change the direction, if the cooperative transmission between the base stations is located in the cell of the cooperative transmission interval between the base stations Data transmission or cooperative transmission between the base stations If not located in the cell of the interval characterized in that it comprises a user terminal for waiting to be located in the cell of the inter-base station cooperative transmission interval to arrive at a predetermined period.

In addition, the base station apparatus according to the second aspect of the present invention for achieving the above object, after assigning a common frequency band to at least one of the plurality of sectors constituting the base station cell, the remaining frequency band to the remaining sectors of the plurality of sectors A frequency band allocating unit for allocating a cooperative transmission cell for setting a sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell to which the common frequency band has been allocated as a cell of a cooperative transmission interval between base stations; A setting unit, a cluster forming unit configured to form cells as a cluster of base station apparatuses sharing a cell of the cooperative transmission interval between the base stations, and clock or half a sector for allocating the common frequency band among a plurality of sectors forming the base station cell A frequency band changing unit configured to change the clockwise direction and set the common frequency; A cooperative transmission cell changing unit for changing a cell of a cooperative transmission interval between base stations based on a sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell changed to allocate an inverse; And a cluster changing unit for changing the cluster into cells formed by base station apparatuses sharing a cell of a cooperative transmission interval between base stations.

Preferably, the base station apparatus further includes a determination unit that determines whether the source of the data transmission request is included in the cell of the inter-base station cooperative transmission interval when there is a data transmission request in the boundary section between the cells included in the cluster. It is characterized by including.

Preferably, the base station apparatus, if the source of the data transmission request is included in the cell of the inter-base station cooperative transmission interval, the base station apparatus performs data transmission by cooperative transmission with at least one other base station apparatus forming a cell of the co-transmission interval between base stations Characterized in that it further comprises a first cooperative transmission execution unit for executing.

Preferably, when the serving base station apparatus which executes the data transmission is determined among the base station apparatus and the at least one other base station apparatus, the serving base station due to the transmission of the common frequency band. It is characterized in that the control to perform the cooperation between the base stations so that interference does not occur in the data transmission executed in the device.

Preferably, the base station apparatus, if the source of the data transmission request is not included in the cell of the inter-base station cooperative transmission (Serving) in response to the data transmission request of the base station apparatus and the at least one other base station apparatus The base station apparatus further comprises a data transmission execution unit for executing the data transmission.

Preferably, the base station apparatus, if the signal to interference-plus-noise ratio (SINR) for the serving base station apparatus is less than a predetermined level, the source of the data transmission request to the cell of the inter-base station cooperative transmission; Characterized in that it further comprises a second cooperative transmission execution unit waiting until included.

Preferably, the remaining frequency band is characterized in that the frequency band divided into at least one or more.

Preferably, the frequency band changer is executed by a predetermined period.

In addition, a user terminal device according to a third aspect of the present invention for achieving the above object comprises a sector of the common frequency band included in at least one other base station cell adjacent to a sector of the base station cell to which the common frequency band is allocated. A data transmission request unit for requesting data transmission in a boundary section between cells among clusters of cells of base station devices sharing cells of a cooperative transmission interval between base stations and a location for requesting data transmission are included in the cell of the cooperative transmission interval between base stations. And a first data transmission execution unit executing the data transmission based on cooperative transmission between the base station devices.

Preferably, the user terminal device through a serving base station device that responds to the request for data transmission among the base station devices if the location of the user terminal device is not included in the cell of the inter-base station cooperative transmission interval And a second data transfer execution unit for executing the data transfer.

Preferably, the user terminal device, if the SINR (Signal to Interference-plus-Noise Ratio) for the serving base station device is less than the predetermined level, the location of the user terminal device is the cell of the cooperative transmission between the base stations The apparatus may further include a third data transfer execution unit waiting to be included in the.

In addition, in the semi-fixed clustering implementation method for cooperative transmission between base stations according to the fourth aspect of the present invention for achieving the above object, the base station apparatus has a common frequency band in at least one of a plurality of sectors forming a corresponding base station cell; Allocating a residual frequency band to remaining sectors of the plurality of sectors after allocating, and assigning a sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell to which the common frequency band has been allocated. Setting a cell as a cell of a cooperative transmission interval between base stations, forming a cluster of cells formed by base station devices sharing a cell of a cooperative transmission interval between base stations, and allocating the common frequency band among a plurality of sectors forming the base station cell; Setting sectors by changing them clockwise or counterclockwise, Changing a cell of the cooperative transmission interval between the base stations based on a sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell which has been changed to allocating a common frequency band and the changed base station And changing the cluster to cells formed by base station apparatuses sharing a cell of an inter-cooperative transmission interval.

Preferably, the semi-fixed clustering implementation method for cooperative transmission between the base stations, when the data transmission request in the boundary section between the cells included in the cluster source of the data transmission request of the co-transmission interval between base stations Determining whether the cell is included in the cell.

Preferably, the semi-fixed clustering implementation method for cooperative transmission between base stations includes at least one cell forming the cell of the co-transmission interval between base stations when the source of the data transmission request is included in a cell of the co-transmission interval between base stations. And performing data transmission by cooperative transmission with another base station apparatus.

Preferably, when the serving base station apparatus which executes the data transmission is determined among the base station apparatus and the at least one other base station apparatus, the serving base station due to the transmission of the common frequency band. It is characterized in that the control to perform the cooperation between the base stations so that interference does not occur in the data transmission executed in the device.

Advantageously, the semi-fixed clustering implementation method for cooperative transmission between the base stations includes: the base station apparatus and the at least one other base station apparatus if the source of the data transmission request is not included in the cell of the cooperative transmission between the base stations. And performing the data transmission in a serving base station apparatus responsive to the data transmission request.

Preferably, the semi-fixed clustering implementation method for cooperative transmission between the base stations, if the signal to interference-plus-noise ratio (SINR) for the serving base station device is less than a predetermined level of the request of the data transmission request; Waiting until the source is included in the cell of the inter-base station cooperative transmission, characterized in that it further comprises.

Preferably, the remaining frequency band is characterized in that the frequency band divided into at least one or more.

Preferably, the step of changing and setting a sector for allocating the common frequency band among the plurality of sectors in a clockwise or counterclockwise direction is performed at a predetermined period.

In addition, the semi-fixed clustering implementation method for cooperative transmission between base stations according to the fifth aspect of the present invention for achieving the above object, at least one other adjacent to the sector of the base station cell to which the user terminal has assigned a common frequency band Requesting data transmission in a boundary section between cells of a cluster, which is a cell of base station devices sharing a cell in a co-transmission interval between base stations comprising a sector of the common frequency band included in a base station cell, and the location of the user terminal device being And performing data transmission based on cooperative transmission between the base station devices when included in a cell of a cooperative transmission interval between base stations.

Preferably, the user terminal device, if the location of the user terminal device is not included in the cell of the inter-base station cooperative transmission interval serving base station apparatus (Serving) in response to the request for the data transmission of the base station apparatuses; The method may further include executing the data transmission.

Preferably, the user terminal device, if the SINR (Signal to Interference-plus-Noise Ratio) for the serving base station device is less than the predetermined level, the location of the user terminal device is the cell of the cooperative transmission between the base stations Waiting until included in, characterized in that it further comprises.

Therefore, the present invention newly proposes a clustering scheme for cooperative transmission between base stations, thereby increasing the chance of cooperative transmission between base stations, solving the interference problem on the cell boundary or cluster boundary, and implementing this as a low complexity system. Since the terminal device of the user located at the cell boundary or the cluster boundary periodically receives cooperative transmission between the base stations, there is an advantage of improving the overall data rate.

1 is a diagram showing an example of a cluster configuration according to the prior art;
2 is a diagram showing an embodiment of a semi-fixed clustering implementation system for cooperative transmission between base stations according to the present invention;
3 is a diagram illustrating an embodiment of a base station apparatus according to the present invention;
4 is a diagram illustrating a pattern in which frequency band allocation is changed by an operation of the base station apparatus illustrated in FIG. 3;
5 is a view showing an example of a cluster configuration according to the present invention;
6 is a view showing an example of a user terminal device according to the present invention;
7 is a view showing an interference effect according to the present invention,
8 is a view showing a result of comparing the clustering according to the present invention with conventional fixed clustering,
9 is a view showing an operation process of a base station apparatus according to an embodiment of the present invention; and
10 is a diagram illustrating an operation process of a user terminal device according to an exemplary embodiment of the present invention.

Hereinafter, a preferred embodiment of a semi-fixed clustering implementation system for cooperative transmission between base stations according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating an embodiment of a semi-fixed clustering implementation system for cooperative transmission between base stations according to the present invention. As shown only as an example in FIG. 2, the semi-fixed clustering implementation system for cooperative transmission between base stations increases interference opportunities by increasing cooperative transmission between base stations even when the user terminal 200 is located at a cell boundary or a cluster boundary. Have a configuration to solve.

To this end, in the present invention, after setting a common frequency band that can be shared by all the base station apparatus 100 in at least one of a plurality of sectors in the base station cell formed by the base station apparatus 100, the common frequency band is set according to a preset period. In order to change the sector, a cell of a cooperative transmission interval between base stations, which includes only a common frequency band, is periodically varied.

Therefore, the clusters of cells formed by the base station apparatus 100 (for example, the first base station apparatus 100, the second base station apparatus 100, etc.) sharing the cells of the cooperative transmission interval between base stations are periodically changed in the same manner. do.

That is, according to the present invention, since all sectors of each cell formed by each base station apparatus 100 in a certain area can be allocated a common frequency band for cooperative transmission between base stations, the base station for reducing interference at a cell boundary or a cluster boundary. The opportunity for cooperative transmission between the two can be greatly increased.

3 is a diagram illustrating an example of a base station apparatus 100 according to the present invention. As shown by way of example only in FIG. 3, the base station apparatus 100 allocates a common frequency band to at least one of a plurality of sectors constituting the base station cell, and then allocates a remaining frequency band to the remaining sectors of the allocated plurality of sectors. The frequency band allocating unit 110 and the cooperative transmission cell setting unit for setting the sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell to which the common frequency band is allocated as the cell of the cooperative transmission interval between base stations. 120, the cluster forming unit 130 to form a cluster consisting of the cells formed by the base station apparatus 100 sharing a cell of the cooperative transmission interval between base stations as a base unit, a common frequency band of a plurality of sectors forming a base station cell A frequency band changing unit 140 for changing a sector for allocation clockwise or counterclockwise and setting The cooperative transmission cell changing unit 150 for changing the cell of the cooperative transmission interval between base stations based on the sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell changed to It includes a cluster changing unit 160 for changing the cluster to cells formed by the base station apparatus 100 sharing a cell of.

When the base station apparatus 100 having such a basic configuration has a request for data transmission from the user terminal apparatus 200 located at a boundary section between cells in a cluster, the user terminal apparatus 200 first performs a communication connection corresponding thereto. Determination unit 170 for determining whether the location of the location is in the cell of the inter-base station cooperative transmission interval, and if the user terminal device 200 is located in the cell of the co-transmission interval between base stations, the determination result cell The apparatus may further include a first cooperative transmission execution unit 180 for performing data transmission by performing cooperative transmission between a plurality of base station apparatuses 100.

Here, the cooperative transmission between the plurality of base station apparatuses 100 means that when a serving base station apparatus 100 that executes data transmission among the plurality of base station apparatuses 100 is determined, each base station apparatus 100 transmits them. Since the frequency signal of the common frequency band may cause interference in the data transmission performed between the serving base station apparatus 100 and the user terminal 200, it refers to executing control to avoid this between the base stations.

For example, in order to avoid interference in each base station apparatus 100, various controls such as reducing the strength of the frequency signal of the common frequency band being transmitted to below a predetermined level can be performed.

In addition, the user terminal device 200 located at the boundary between cells may not be included in a cell of cooperative transmission between base stations in a specific cluster.

In this case, the base station apparatus 100 may include a data transmission execution unit 190 for executing a data transmission service once in response to a data transmission request of the user terminal apparatus 200. In this case, the base station apparatus 100 may be set to the serving base station apparatus 100.

As such, when the base station apparatus 100 operating as the serving base station apparatus 100 is determined to have a Signal to Interference-plus-Noise Ratio (SINR) with the user terminal 200 below a predetermined level, the user terminal Preferably, the apparatus 200 further includes a second cooperative transmission execution unit 190-1 for controlling to wait until the location of the device 200 is included in the cell of the inter-base station cooperative transmission.

The remaining frequency band allocated to the remaining sectors to which the common frequency band is allocated among the plurality of sectors constituting the base station cell is preferably a frequency band divided into at least one or more.

4 is a diagram illustrating a pattern in which frequency band allocation is changed by an operation of the base station apparatus 100 illustrated in FIG. 3. As shown only as an example in FIG. 4, the frequency band changing unit 140 clocks or assigns a sector for allocating a common frequency band (ie, f1) among a plurality of sectors forming a corresponding base station cell according to a preset period. Set it counterclockwise.

The remaining sectors after allocating the common frequency band (i.e., f1) are arbitrarily allocated to the remaining frequency bands (i.e., f2, f3, f4) provided for allocation to the base station cell.

Usually, the number of sectors constituting the base station cell is often composed of three according to the hardware configuration of the base station system, and in view of this standard, four frequency bands including a common frequency band are provided. desirable.

In addition, when the base station cell composed of three sectors is used as a reference, the cell of the inter-base station cooperative transmission interval consisting of only a common frequency band also includes three sectors. This means that the three base station apparatuses 100 cooperate with each other.

Therefore, in this case, a cluster is also set based on three cells.

5 is a diagram illustrating a cluster configuration according to an embodiment of the present invention. As shown by way of example only in FIG. 5, several clusters are formed by multiple base station apparatus 100 (a).

Subsequently, each base station apparatus 100 rotates and sets a sector for allocating a common frequency band in a corresponding base station cell in a counterclockwise direction according to a preset period, thereby changing a cell of cooperative transmission between base stations through this. The formation of clusters is also changed (b).

In addition, each base station apparatus 100 is further configured to further rotate in the counterclockwise direction to set the sector for allocating the common frequency band in the base station cell according to a predetermined period, the cell of the cooperative transmission between base stations and The cluster is changed again (c).

The repetition of the above process generates an opportunity for cooperative transmission between base stations in all sectors and increases the number of times.

6 is a diagram illustrating an example of a user terminal device 200 according to the present invention. As shown by way of example only in FIG. 6, the user terminal device 200 is a cooperative transmission between base stations consisting of sectors of a common frequency band included in at least one other base station cell adjacent to a sector of a base station cell to which a common frequency band has been allocated. The data transmission request unit 210 for requesting data transmission and the position for requesting data transmission are included in the cell of the cooperative transmission interval between base stations in a boundary section between cells among the clusters of cells of the base station apparatus 100 that share the cells of the interval. The first data transmission execution unit 220 performs data transmission based on cooperative transmission between the base station apparatuses 100.

Furthermore, if the location of the user terminal device 200 is not included in the cell of the inter-base station cooperative transmission interval, the user terminal device 200 serves to respond to a request for data transmission among the base station devices 100. When the signal to interference-plus-noise ratio (SINR) for the second data transmission execution unit 230 for performing data transmission through the base station apparatus 100 and the serving base station apparatus 100 is less than or equal to a predetermined level. It is also a preferred configuration to further include a third data transmission execution unit 240 to wait until the location of the user terminal device 200 is included in the cell of the inter-base station cooperative transmission.

7 is a diagram showing an interference effect according to the present invention. As shown by way of example only in Figure 7, it can be seen that the interference effect due to the clustering applied the present invention is significantly less than the interference effect of the result of applying the conventional fixed clustering.

8 is a view showing a result of comparing the clustering according to the present invention with conventional fixed clustering. As shown by way of example only in FIG. 8, the present invention is also found to produce a much better effect than the conventional fixed clustering in spectral analysis for clustering.

9 is a diagram illustrating an operation process of the base station apparatus 100 according to the present invention. As shown only as an example in FIG. 9, the base station apparatus 100 allocates a common frequency band to at least one of a plurality of sectors constituting the base station cell, and then randomly assigns a remaining frequency band to the remaining sectors (S100).

Subsequently, a cell of a cooperative transmission interval between base stations including a sector of a common frequency band included in a cell of another base station adjacent to the corresponding sector of the base station cell to which the common frequency band is allocated is set (S102).

Therefore, the cell of the cooperative transmission interval between base stations is the center cell, and the cells of the base station apparatuses 100 involved therein are grouped to form a cluster (S104).

In addition, the sector in the base station cell for allocating the common frequency band is changed according to a preset period (S106), and the cell and cluster in the cooperative transmission interval between base stations are also changed due to the change of the sector in which the common frequency band is allocated. (S108 and S110)

During this process, if there is a request for providing a data transmission service from the user terminal device 200 located at a predetermined cell boundary in the cluster (S112), it is determined whether the corresponding user terminal device 200 is located in a cell of a cooperative transmission interval between base stations. (S114).

In step S114, if the user terminal device 200 is not located in the cell of the cooperative transmission interval between base stations, the data transmission service is preferentially provided by the serving base station device 100 in response to the data transmission request of the user terminal device 200. (S116), if the Signal to Interference-plus-Noise Ratio (SINR) between the serving base station apparatus 100 and the user terminal 200 is less than the predetermined level, the user in the cell of the inter-base station cooperative transmission to be coming later Wait until the location of the terminal device 200 is included (S118 and S120).

In operation S114, when the user terminal device 200 is located in a cell of a cooperative transmission interval between base stations, the data transmission service is provided to the user terminal device 200 based on the cooperative transmission between the corresponding base station devices 100. (S122).

When the data transmission service is terminated, the above processes are also terminated (S124).

10 is a diagram illustrating an operation process of the user terminal device 200 according to the present invention. As shown only as an example in FIG. 10, the user terminal device 200 may request data transmission from the base station device 100 after being located at a boundary between cells in a cluster (S200 and S202).

Thus, it is determined whether the location of the user terminal device 200 is included in the cell of the base station cooperative transmission interval (S204).

In step S204, if the user terminal device 200 is not located in the cell of the inter-base station cooperative transmission interval to form a data transmission service with the serving base station device 100 in response to the data transmission request of the user terminal device 200 ( S206) In this process, if the Signal to Interference-plus-Noise Ratio (SINR) between the serving base station apparatus 100 and the user terminal apparatus 200 is less than or equal to a predetermined level, the user terminal is located in a cell of cooperative transmission between base stations that will come later. Wait until the location of the device 200 is included (S208 and S210).

In operation S204, when the user terminal device 200 is located in a cell of a cooperative transmission interval between base stations, the data transmission service is provided to the user terminal device 200 based on the cooperative transmission between the corresponding base station devices 100. (S212).

When the data transmission service is terminated, the above processes are also terminated (S214).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

In addition, as the present invention newly proposes a clustering scheme for cooperative transmission between base stations, it is easy to overcome interference occurring at a cell boundary or a cluster boundary for providing a data transmission service. It is an invention that is industrially applicable because it is not only sufficient but also practically practical.

100: base station apparatus 110: frequency band allocation unit
120: cooperative transmission cell setting unit 130: cluster forming unit
140: frequency band changing unit 150: cooperative transmission cell changing unit
160: cluster change unit 170: determination unit
180: first cooperative transmission execution unit 190: data transmission execution unit
190-1: second cooperative transmission execution unit
200: user terminal device 210: data transmission request unit
220: first data transfer execution unit 230: second data transfer execution unit
240: third data transfer execution unit

Claims (23)

Forming a cluster that is a cell of base station apparatuses that share a cell of a cooperative transmission interval consisting of sectors of the common frequency band included in at least one other base station cell adjacent to a sector of the base station cell to which the common frequency band is allocated; A base station apparatus for varying a cell and a cluster of a cooperative transmission interval between base stations by changing a sector for allocating the common frequency band in a clockwise or counterclockwise direction among a plurality of sectors forming a base station cell;
If the cell is located in a boundary section between cells in the cluster, if the cell is located in a cell of the cooperative transmission section between base stations, data transmission is performed through cooperative transmission between base stations, or if the cell is not located in a cell of the cooperative transmission section between base stations, the cell arrives at a predetermined period. And a user terminal for waiting until located in a cell of the inter-base station cooperative transmission interval. A frequency band allocator for allocating a common frequency band to at least one of a plurality of sectors constituting a base station cell and then assigning a remaining frequency band to the remaining sectors of the plurality of sectors;
A cooperative transmission cell setting unit for setting the sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell to which the common frequency band is allocated as a cell of a cooperative transmission interval between base stations;
A cluster forming unit configured to form cells as a cluster of base station apparatuses sharing a cell of a cooperative transmission interval between base stations;
A frequency band changing unit configured to change a sector for allocating the common frequency band among the plurality of sectors constituting the base station cell in a clockwise or counterclockwise direction, and set the sector;
A cooperative transmission cell change unit for changing a cell of a cooperative transmission interval between base stations based on a sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell changed to allocating the common frequency band;
And a cluster changing unit for changing the cluster into cells formed by base station apparatuses sharing a cell of the cooperative transmission interval between the changed base stations. The method of claim 2,
The base station apparatus further includes a determination unit for determining whether the source of the data transmission request is included in a cell of the inter-base station cooperative transmission interval when there is a data transmission request in a boundary section between cells included in the cluster. Base station apparatus. The method of claim 3,
The base station apparatus, if the source of the data transmission request is included in a cell of the inter-base station cooperative transmission interval, performs cooperative transmission with at least one other base station apparatus forming a cell of the inter-base station cooperative transmission interval to perform data transmission. The base station apparatus further comprises a cooperative transmission execution unit. The method of claim 4, wherein
The cooperative transmission is performed by the serving base station apparatus due to the transmission of the common frequency band when a serving base station apparatus that executes the data transmission is determined between the base station apparatus and the at least one other base station apparatus. And a base station apparatus for performing coordination between base stations so that interference does not occur in the data transmission. The method of claim 3,
The base station apparatus, in the serving base station apparatus that responds to the data transmission request of the base station apparatus and the at least one other base station apparatus when the source of the data transmission request is not included in the cell of the inter-base station cooperative transmission. The base station apparatus, further comprising a data transmission execution unit for performing data transmission. The method of claim 6,
The base station apparatus waits until the source of the data transmission request is included in the cell of the inter-base station coordination when the signal to interference-plus-noise ratio (SINR) for the serving base station apparatus is less than or equal to a predetermined level. And a second cooperative transmission execution unit. The method according to any one of claims 2 to 7,
The remaining frequency band is a base station device, characterized in that the frequency band divided into at least one or more. The method according to any one of claims 2 to 7,
And the frequency band changing unit is executed at a predetermined period. Boundary interval between cells in a cluster that is a cell of base station apparatuses sharing a cell of a cooperative transmission interval consisting of sectors of the common frequency band included in at least one other base station cell adjacent to a sector of a base station cell to which a common frequency band is allocated Data transmission request unit for requesting data transmission in the
And a first data transmission execution unit configured to execute the data transmission based on the cooperative transmission between the base station apparatuses when the location for requesting the data transmission is included in the cell of the cooperative transmission interval between base stations. . The method of claim 10,
The user terminal apparatus transmits the data through a serving base station apparatus that responds to a request for the data transmission among the base station apparatuses if the location of the user terminal apparatus is not included in a cell of the co-transmission interval between base stations. The user terminal device further comprises a second data transmission execution unit for executing. The method of claim 10,
The user terminal device, when the signal to interference-plus-noise ratio (SINR) for the serving base station device is less than the predetermined level until the location of the user terminal device is included in the cell of the inter-base station cooperative transmission And a third data transfer execution unit waiting. Assigning, by the base station apparatus, a common frequency band to at least one of a plurality of sectors forming a corresponding base station cell, and then assigning a remaining frequency band to the remaining sectors of the plurality of sectors,
Setting a sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell to which the common frequency band has been allocated as a cell of a cooperative transmission interval between base stations;
Forming cells formed by base station apparatuses sharing cells of the cooperative transmission interval between base stations into a cluster;
Setting a sector for allocating the common frequency band among the plurality of sectors constituting the base station cell in a clockwise or counterclockwise direction,
Changing a cell of the inter-base station cooperative transmission interval based on a sector of the common frequency band included in at least one other base station cell adjacent to the sector of the base station cell changed to allocating the common frequency band; and
And changing the cluster to cells formed by base station apparatuses sharing the cell of the cooperative transmission interval between the changed base stations. The method of claim 13,
The semi-fixed clustering implementation method for cooperative transmission between base stations may include whether the source of the data transmission request is included in a cell of the co-transmission interval between base stations when there is a data transmission request in a boundary section between cells included in the cluster. Semi-fixed clustering implementation method for cooperative transmission between base stations, characterized in that it further comprises the step of determining. 15. The method of claim 14,
The semi-fixed clustering implementation method for cooperative transmission between base stations may include: at least one other base station device forming a cell of a cooperative transmission interval between base stations when the source of the data transmission request is included in a cell of the cooperative transmission interval between base stations; A method for implementing semi-fixed clustering for cooperative transmission between base stations further comprising the step of performing data transmission by performing cooperative transmission. The method of claim 15,
The cooperative transmission is performed by the serving base station apparatus due to the transmission of the common frequency band when a serving base station apparatus that executes the data transmission is determined between the base station apparatus and the at least one other base station apparatus. The semi-fixed clustering implementation method for cooperative transmission between base stations, characterized in that the control to perform the cooperation between the base stations so that interference does not occur in the data transmission. 15. The method of claim 14,
The semi-fixed clustering implementation method for cooperative transmission between the base stations is based on the data transmission request among the base station apparatus and the at least one other base station apparatus when the source of the data transmission request is not included in the cell of the cooperative transmission between the base stations. And executing the data transmission in a responding serving base station apparatus. The method of claim 17,
In the semi-fixed clustering implementation method for cooperative transmission between base stations, when the signal to interference-plus-noise ratio (SINR) for the serving base station apparatus is less than or equal to a predetermined level, the source of the data transmission request is the base station. Waiting until included in the cell of the inter-cooperative transmission; semi-fixed clustering implementation method for co-transmission between the base station further comprising. The method according to any one of claims 13 to 18,
The remaining frequency band is a semi-fixed clustering implementation method for cooperative transmission between the base station, characterized in that the frequency band divided into at least one or more. The method according to any one of claims 13 to 18,
The method of implementing semi-fixed clustering for cooperative transmission between base stations, wherein the setting of a sector for allocating the common frequency band among the plurality of sectors in a clockwise or counterclockwise direction is performed by a predetermined period. . A cluster in which a user terminal device shares cells of a cooperative transmission interval between base stations consisting of sectors of the common frequency band included in at least one other base station cell adjacent to a sector of the base station cell to which the common frequency band is allocated. Requesting data transmission in the boundary section between the cells; and
And performing the data transmission based on the cooperative transmission between the base station apparatuses when the location of the user terminal is included in the cell of the cooperative transmission interval between the base stations. How to implement clustering. The method of claim 21,
The user terminal apparatus transmits the data through a serving base station apparatus that responds to a request for the data transmission among the base station apparatuses if the location of the user terminal apparatus is not included in a cell of the co-transmission interval between base stations. The semi-fixed clustering implementation method for cooperative transmission between base stations further comprising the step of executing. The method of claim 22,
The user terminal device, when the signal to interference-plus-noise ratio (SINR) for the serving base station device is less than the predetermined level until the location of the user terminal device is included in the cell of the inter-base station cooperative transmission A semi-fixed clustering implementation method for cooperative transmission between base stations, further comprising the step of waiting.

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