KR101537732B1 - Resource allocation device for controlling frequency interference of Femtocell Base Station and, Method therefor - Google Patents

Abstract

The present invention relates to a femtocell base station, and more particularly, to an apparatus and method for allocating frequency resources to each base station in order to control frequency interference between femtocell base stations or interference between a femtocell base station and a macrocell base station. A resource allocation apparatus according to an embodiment of the present invention is a resource allocation apparatus for controlling frequency resource interference between base stations, the apparatus comprising: at least one usage pattern for a frequency frame composed of sub- A usage pattern generation unit for generating the usage pattern and the pattern reuse index; And a usage pattern allocator allocating at least one usage pattern generated by the usage pattern generator to a base station. According to another aspect of the present invention, there is provided a resource allocation method for controlling frequency resource interference between base stations, the method comprising: dividing a frequency frame into subframes of a constant time unit; A usage pattern generation step of generating at least one usage pattern for the frequency frame using a resource use rate and a pattern reuse index; And a usage pattern allocation step of allocating the generated at least one usage pattern to a base station.

Description

[0001] The present invention relates to a resource allocation apparatus for controlling frequency interference of a femtocell base station,

The present invention relates to a femtocell base station, and more particularly, to an apparatus and method for allocating frequency resources to each femtocell base station to control frequency interference between femtocell base stations or interference between a femtocell base station and a macrocell base station.

Next-generation wireless mobile communication systems require fast and reliable support for voice and data as well as multimedia services. In particular, 3GPP Long Term Evolution (LTE) aims to guarantee data rates of 100Mbps and 50Mbps for downlink and uplink, respectively.

However, in a closed building such as a home, an office or an apartment, the quality of a signal is deteriorated due to the blocking effect of a building, a wall, and a window, so it is difficult to satisfy a data transmission rate or a call quality required by users. In particular, 40% of third-generation mobile communication services and 70% of data services are generated indoors.

In addition, in the dense regions such as restaurants, cafes, and public institutions, the traffic generated is so high that wireless communication services are relatively degraded in these dense areas.

Therefore, traffic offloading and quality improvement for indoor wireless communication service and wireless communication service in a dense area are becoming important technical issues.

Femtocell is attracting attention as one of solutions for improving traffic offloading and call quality. A femtocell is an indoor base station used in a dense area such as a closed building such as a home, an office, an apartment, or a restaurant, a cafe, and a public institution, and connects to a mobile communication core network through a broadband network . The femtocell can improve the quality of the call and the service by reducing the distance between the transmitting end and the receiving end as compared to the macrocell, and can effectively service (offload) the traffic generated intensively in the indoor. In addition, it provides a high-quality communication environment in the shade area, so that the coverage can be expanded. In addition, femtocells can be easily installed in a plug-and-play environment indoors by users without additional infrastructure, thus improving the quality of communication services at low cost.

On the other hand, there are various technical problems caused by the femtocell installation. That is, in order to realistically implement the femtocell, it is necessary to solve the interference problem between the macro cell and the femtocell, the synchronization problem, the handover, the system structure design, the channel information acquisition method in the femtocell, and the radio environment recognition method around the femtocell. One of the most important problems is the problem of system capacity and service quality degradation due to interference between macrocells and femtocells and between femtocells and femtocells. Therefore, in order to improve system capacity and service quality, interference mitigation or avoidance method between femtocells is needed.

It is an object of the present invention to provide a device and a resource allocation method for allocating radio resources of a femtocell base station for frequency interference control between femtocell base stations.

Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a resource allocation apparatus for controlling a frequency resource interference between a plurality of base stations, the apparatus comprising: A use pattern generating unit for generating a use pattern of the resource use ratio and the pattern reuse index; And a usage pattern allocator allocating at least one usage pattern generated by the usage pattern generator to a base station.

According to another aspect of the present invention, there is provided a resource allocation method for controlling frequency resource interference between base stations, the method comprising: dividing a frequency frame into subframes of a constant time unit; A usage pattern generation step of generating at least one usage pattern for the frequency frame using a resource use rate and a pattern reuse index; And a usage pattern allocation step of allocating the generated at least one usage pattern to a base station.

According to an embodiment of the present invention, the femtocell base stations are allocated to use different femtocell base stations by dividing radio frequency resources, thereby mitigating interference between the femtocell base stations.

Also, according to an embodiment of the present invention, there is an effect of mitigating the interference to the macro cell base station by adaptively adjusting the resource usage ratio of the entire femto system according to the channel condition.

In addition, according to the embodiment of the present invention, the femtocell management system implements the radio frequency resources, so that there is no need to exchange between the femtocell base stations through the X2 interface.

Also, according to the embodiment of the present invention, the femtocell base stations are different from each other in radio frequency, thereby improving the performance of the entire system.

1 is a diagram illustrating interference between a macro cell base station and a femtocell base station.
2 is a diagram illustrating interference between femtocell base stations.
3 is a diagram illustrating resource allocation for interference control between femtocell base stations according to an embodiment of the present invention.
4 is a diagram illustrating resource allocation for interference control between femtocell base stations according to another embodiment of the present invention.
5 is a diagram illustrating resource allocation for interference control between femtocell base stations according to another embodiment of the present invention.
6 is a diagram illustrating a communication environment according to an embodiment of the present invention.
7 is a block diagram illustrating a resource allocation apparatus according to an embodiment of the present invention.

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In explaining the concrete contents of the present invention, the macro cell base station and the femtocell base station 100 are assumed to operate on the same frequency.

FIG. 1 is a diagram showing interference between a macro cell base station and a femtocell base station 100.

Referring to FIG. 1, there are shown a macro cell base station, a femtocell base station 100 located within the coverage of the macro cell base station, and a communication terminal 1 communicating with the macro cell base station or the femtocell base station 100.

The macro cell base station is a network interface supporting various communication methods such as UMTS, GSM, GPRS, CDMA, and WCDMA and is also used as a NodeB or a base station. The macro cell base station functions as a physical wireless access point with the communication terminal 1, such as setting of a radio physical channel, channel coding, modulation and demodulation, handover function, and Qos control. On the other hand, the macro cell base station is also referred to as an eNodeB (evolved NodeB) in 4G LTE.

The femtocell base station 100 sets a femtocell coverage for a small number of subscribers in a building located in an area of a macro cell base station having a wide radius existing in an outdoor area to provide a specific communication service. Specifically, the femtocell base station 100 is connected to a mobile communication core network using a public network such as a digital subscriber line (DSL) installed in the room, such as a home or office, and provides a service to a user .

Meanwhile, the femtocell base station 100 may be used in various terms such as a micro-base station, a pico base station, a Ubicell base station, and a HeNodeB (Home eNodeB) And should be understood as all (very) small base stations that are connected to the core network of the system and provide communication services to the communication terminal 1.

The communication terminal 1 is a device that provides voice communication or packet communication using a mobile communication network and is referred to as another term such as User Equipment (UE), Mobile Station (MS), User Terminal (UT), Subscriber Station . For example, the communication terminal 1 according to the present invention can be applied to a conventional mobile phone such as a cellular phone, a PCS phone, a GSM phone, a CDMA-2000 phone, a WCDMA phone and the like as well as a recently used smart phone, A mobile phone to be used, and the like.

In this specification, the term macrocell terminal 1-1 is used to describe a communication terminal 1 that is located in a macro cell area but is not located in a femtocell area and communicates with a macro cell base station, The femtocell terminal 1-2 is used to describe the communication terminal 1 that is located in the femtocell region and communicates with the femtocell base station 100. [

Referring to the downlink in FIG. 1, in the case of the macro cell terminal 1-1, the downlink signal from the femtocell base station 100 interferes with the downlink signal from the macro cell base station. Further, in the case of the femtocell terminal 1-2, the downlink signal from the macrocell base station interferes with the downlink signal from the femtocell base station 100. [

Referring to the uplink in FIG. 1, in the case of the macro cell terminal 1-1, the uplink signal to the femtocell base station 100 interferes with the uplink signal to the macro cell base station, 1-2, the uplink signal to the macro cell base station interferes with the uplink signal to the femtocell base station 100.

2 is a diagram illustrating interference between femtocell base stations 100. As shown in FIG.

Referring to FIG. 2, the downlink of another femtocell base station 100 interferes with the femtocell downlink to the femtocell terminal 1-2, and the downlink of the femtocell base station 100 from another femtocell base station RTI ID = 0.0 > 100 < / RTI > Although the femtocell base station 100 uses a relatively low transmission power as compared with the macrocell base station, when many femtocell base stations 100 are located in a specific area, serious performance degradation may occur due to such interference.

3 is a diagram illustrating resource allocation for interference control between the femtocell base stations 100 according to an embodiment of the present invention.

3 (a) shows a usage pattern for a frequency frame that the femtocell base stations 100 can use, and FIG. 3 (b) shows a usage pattern of a frequency frame allocated to the femtocell base stations 100 .

Referring to FIG. 3A, a frequency frame that can be used by the femtocell base stations 100 is divided into subframes of a constant time unit. For example, in FIG. 3, a frequency frame that can be used by the femtocell base stations 100 is 20 ms units, and is divided into 20 subframes of 1 ms unit. In order to facilitate understanding of the present embodiment, each subframe is distinguished by a number from 0 to N-1. That is, each of the subframes is divided into a 0 < th > subframe, a 1 & , i sub-frame, and 19th sub-frame.

According to the present embodiment, at least one usage pattern for the frequency frame is generated, and the usage pattern is information on whether each subframe is activated or deactivated. Activation of a subframe means that the corresponding subframe is used for actual data transmission. Also, when a subframe is deactivated, it means that the corresponding subframe is not used for actual data transmission. In addition, the fact that the subframe is activated or deactivated implies that the transmit and receive power levels of the activated subframe and the deactivated subframe are differentially adjusted. For example, an activated subframe may have a maximum transmit / receive power level, and a disabled subframe may have a minimum transmit / receive power level.

On the other hand, the control information, which is indispensably required for the communication service, can be transmitted irrespective of whether or not the subframe is inactivated

In the present specification, ON is used to indicate activation of a sub-frame, and OFF is used to indicate that a sub-frame is inactivated. From this point of view, referring to Fig. 3 (a), three different usage patterns are shown.

In FIG. 3A, subframes 3, 4, 8, 9, 13, 14, 18, and 19 are always OFF, and the corresponding subframe is not used at all for data transmission, This means that it is used for data transmission according to the pattern.

3 (b) shows that each of the at least one usage pattern generated as shown in FIG. 3 (a) is allocated to the femtocell base station 100. 3 (b), a first usage pattern is allocated to the femtocell base station 100, and the femtocell base station 100 uses the subframes 0, 5, 10, and 15 and the femtocell base station 100 The second usage pattern is allocated to the femtocell base station 100 and the femtocell base station 100 is allocated to the femtocell base station 100 and the second usage pattern is assigned to the femtocell base station 100, 100) 3 uses subframes 2, 7, 12, and 17. The femtocell base station 100 4 is assigned the same usage pattern as the femtocell base station 100 1 and the femtocell base station 100 5 is assigned the same usage pattern as the femtocell base station 100 2. The same usage pattern as that of the femtocell base station 100 is assigned.

Variables that can be adjusted in resource allocation for interference control between the femtocell base station 100 according to the present embodiment are as follows.

Resource use ratio ( rho ): means the ratio of the number of subframes (ON) used for actual data transmission to the total number of subframes. In the embodiment according to FIG. 3, ρ = 3/5, that is, 12 subframes out of 20 subframes are adjusted to be ON. 1, 2, 5, 6, 7, 10, 11, 12, and 19 are not used for data transmission, and subframes 3, 4, 8, 9, 13, 15, 16 and 17 are used for data transmission.

(2) Pattern reuse index ( r ): The number of usage patterns generated orthogonally to each other. In the embodiment according to Figure 3 r = 3 That is, the three usage patterns (first usage pattern, the second usage pattern, the third usage patterns) are adjusted such that the generated the three usage patterns are six femtocell base station 100 And are assigned to.

When the resource use ratio ( rho ) and the pattern reuse index ( r ) are determined, the following variables are determined.

■ Period in units of subframes (T): A period in which subframes are turned ON in one usage pattern, and the following formula is followed.

T = ceiling ( r / rho )

In the embodiment according to FIG. 3, T = ceiling (3 / (3/5)) = 5.

<Use pattern creation>

1.1) Create first usage pattern

The first usage pattern is determined to be ON in the i-th subframe according to the following equation. Where i is the subframe number and is a number from 0 to 19 in the embodiment of FIG.

In FIG. 3, the cycle T is 5, and i (Mod (i, T) = 0) is 0, 5, 10,

Therefore, in the embodiment of FIG. 3, as shown in FIG. 3A, the first usage pattern is ON in the 0th subframe, the 5th subframe, the 10th subframe and the 15th subframe, OFF.

1.2) 2nd to rth use Create pattern

개의 서브 프레임만큼 오른쪽으로 shift되어 생성된다. floor(5/3) = floor(1.3333) = 1 이므로 도 3 (a) 에 도시된 바와 같이 제 2 사용 패턴은 제 1 사용 패턴에서 1개의 서브 프레임이 오른쪽을 이동되어 생성된다.The second usage pattern is the first usage pattern

Lt; RTI ID = 0.0 &gt; subframes. &Lt; / RTI &gt; Since floor (5/3) = floor (1.3333) = 1, the second usage pattern is generated by shifting one subframe to the right in the first usage pattern as shown in FIG. 3 (a).

Therefore, the second usage pattern is generated to be ON in the first sub-frame, the sixth sub-frame, the eleventh sub-frame, the sixteenth sub-frame, and turned off in the remaining sub-frames.

Likewise, the third usage pattern is generated by moving one subframe to the right in the second usage pattern. As shown in FIG. 3A, the third usage pattern is generated in the second sub-frame, the seventh sub-frame, the twelfth sub-frame, the seventeenth sub-frame, and turned off in the remaining sub-frames.

<Usage pattern assignment>

The generated at least one usage pattern is allocated to each of the femtocell base stations 100. Therefore, if the number of the femtocell base station 100 exceeds r, that is, the number of femtocell base stations 100 is larger than the generated usage pattern, the femtocell base station 100 has the same usage pattern as the other femtocell base stations 100 Can be assigned. For example, in FIG. 3 (b), three usage patterns are redundantly allocated to six femtocell base stations 100.

At this time, the femtocell base station 100 is preferably allocated to the femtocell base station 100 so that the overlapping usage pattern is minimized.

Or a physical cell ID (PCI) used as an identification number of the femtocell base station 100 or a primary scrambling code (PSC). For example, the usage pattern corresponding to the remainder obtained by dividing the PSC of the femtocell base station 100 by r may be allocated to the usage pattern of the femtocell base station 100. [ For example, the following formula can be used.

The use pattern of the femtocell base station 100 (PSC) = Mod (PSC, r ) + 1

In the embodiment of FIG. 3, when the PSC of the femtocell base station 100 is 9129, the first usage pattern may be allocated to the femtocell base station 100 because Mod (9129, 3) + 1 = 1. Similarly, when the PSC of the femtocell base station 100 2 is 9130, the second usage pattern can be allocated to the femtocell base station 100 2 because the Mod (9130, 3) + 1 = 2. Similarly, when the PSC of the femtocell base station 100 4 is 9132, the first usage pattern can be allocated to the femtocell base station 100 4 because the mode (9132, 3) + 1 = 1.

As described with reference to FIG. 3, since the usage patterns for the frequency frames are orthogonal patterns that do not overlap with each other, mutual interference between the femtocell base stations 100 can be minimized, It is also possible to reduce the interference on the macro cell by generating usage patterns to use only the frame.

4 is a diagram illustrating resource allocation for interference control between femtocell base stations 100 according to another embodiment of the present invention.

4A illustrates a usage pattern for a frequency frame that can be used by the femtocell base stations 100. FIG. 4B illustrates a usage pattern of a frequency frame allocated to the femtocell base stations 100. FIG. .

In this embodiment, the resource use ratio ? Is adjusted to be 1/2, that is, 10 subframes out of 20 subframes are used, and the pattern reuse index r is set to 1, that is, one usage pattern is generated .

Accordingly, the period T of the subframe unit is 2 as ceiling (1 / (1/2)).

<Use pattern creation>

1.1) Create first usage pattern

In the first usage pattern, 0, 2, 4, 6, 8, 10, 12, 14, 16, and 18 subframes in which Mod (i, T) = 0 are turned on and the remaining subframes are turned off .

<Usage pattern assignment>

In this embodiment, since only one usage pattern is generated, all the usage patterns allocated to the femtocell base stations 100 are the same.

FIG. 5 is a diagram illustrating resource allocation for interference control between femtocell base stations 100 according to another embodiment of the present invention. Referring to FIG.

5A illustrates a usage pattern for a frequency frame that can be used by the femtocell base stations 100. FIG. 5B illustrates a usage pattern of a frequency frame allocated to the femtocell base stations 100. Referring to FIG. .

In this embodiment, the resource use ratio ? Is adjusted to be 1/2, that is, 10 subframes out of 20 subframes are used, and the pattern reuse index r is set to be 2, that is, .

Accordingly, the period T of the subframe unit is 4 as ceiling (2 / (1/2)).

<Use pattern creation>

1.1) Create first usage pattern

In the first usage pattern, the 0, 4, 8, 12, and 16 subframes in which Mod (i, T) = 0 are turned on and the remaining subframes are turned off according to the following equation.

1.2) Creating a second usage pattern

개의 서브 프레임만큼 오른쪽으로 shift되어 생성된다. floor(4/2) = 2 이므로 도 5의 (a)에 도시된 바와 같이 제 2 사용 패턴은 제 1 사용 패턴에서 2 개의 서브 프레임이 오른쪽으로 이동되어 생성된다.The second usage pattern is the first usage pattern

Lt; RTI ID = 0.0 &gt; subframes. &Lt; / RTI &gt; Since floor (4/2) = 2, the second usage pattern is generated by moving two subframes to the right in the first usage pattern as shown in FIG. 5 (a).

Therefore, the second usage pattern is that the 2, 6, 10, 14, and 18 subframes are ON and the remaining subframes are OFF.

<Usage pattern assignment>

The generated two usage patterns are allocated to the femtocell base stations 100, respectively. Therefore, as shown in FIG. 5 (b), the two usage patterns are overlapped and allocated to the femtocell base stations 100.

At this time, the femtocell base station 100 is preferably allocated to the femtocell base station 100 so that the overlapping usage pattern is minimized.

6 is a diagram illustrating a communication environment according to an embodiment of the present invention.

6, a femtocell gateway 200 (femto GW) communicating with the femtocell base station 100 (femto AP) through an IP Security Tunnel and a femto management system 300 (femto management system) connected to the femtocell gateway 200, Respectively.

The femtocell gateway 200 connects the IP network and the mobile communication core network to enable a communication function for the communication terminal 1 connected to the femtocell base station 100. In addition, the femtocell gateway 200 transmits data received through the mobile communication core network to the communication terminal 1 connected to the femtocell base station 100. In addition, the femtocell gateway 200 performs a protocol conversion or an aggregation function between the mobile communication core network and the IP network.

The femtocell management system 300 manages the femtocell base station 100 connected to the communication network. Specifically, the femtocell management system 300 controls the activation / deactivation of the femtocell base station 100, that is, the state of the femtocell base station 100 and the femtocell base station 100 in response to the location information request of the femtocell base station 100 And provides location information of the femtocell base station 100. In addition, the femtocell management system 300 relays data transmission / reception between the femtocell base station 100 and the devices in the core network as data processing other than communication services.

The femtocell management system 300 can determine the resource use rate p and the pattern reuse index r which are the adjustable variables described above. At this time, the femtocell management system 300 considers factors influencing the inter-femtocell interference (for example, the radius of the macrocell, the femtocell radius in the macrocell, the number of the femtocell base stations 100, .

In addition, the femtocell management system 300 may generate a usage pattern using the resource use rate p and the pattern reuse index r , and may transmit the usage pattern to the individual femtocell base station 100. In this case, the individual femtocell base stations 100 may receive the usage patterns and use the received patterns.

Or femtocell management system 300 may transmit a resource utilization ratio (ρ) the pattern reuse factor (r) determined by the individual femtocell base station 100. When this occurs, the individual femtocell base station 100 may each be used by itself to generate a usage pattern based on the received resource utilization ratio (ρ), and re-use pattern index (r).

The above-described embodiments can be implemented by one device, which will be described later with reference to FIG.

7 is a block diagram illustrating a resource allocation apparatus 700 according to an embodiment of the present invention.

7, the resource allocation apparatus 700 includes a resource allocation variable determining unit 710, a usage pattern generating unit 720, a usage pattern allocating unit 730, and a communication unit 740.

The resource allocation parameter determination unit 710 determines a variable for determining the resource allocation of the femtocell base stations 100 for interference control between the femtocell base stations 100 according to an embodiment of the present invention. The ratio p and the pattern reuse index r . In determining the parameters, the resource allocation parameter determiner 710 determines a factor that affects inter-femtocell interference (for example, the radius of the macrocell, the radius of the femtocell base station 100 in the macrocell, Number of communication, amount of communication at a specific time, etc.) can be considered.

The usage pattern generation unit 720 generates a usage pattern using the variables determined by the resource allocation variable determination unit 710. [ The usage pattern generation process is the same as the one embodiment described with reference to Fig. Specifically, the period T is calculated using T = ceiling ( r / rho )

개의 서브 프레임만큼 순차적으로 오른쪽으로 shift되는 제 2 내지 제 r 사용 패턴을 생성한다.After generating a first usage pattern conforming to &lt; RTI ID = 0.0 &gt;

Second to rth use patterns shifted to the right sequentially by the number of subframes.

The use pattern allocating unit 730 allocates usage patterns generated by the usage pattern generating unit 720 to each of the femtocell base stations 100 according to a rule. The rule may arbitrarily assign any one of the generated usage patterns to the femtocell base station 100, but it is preferable that the rule determines that the overlapping of the usage patterns used by the femtocell base stations 100 is minimized. For example, the use pattern corresponding to the remainder obtained by dividing the PCI and PSC used as the identification number of the femtocell base station 100 by r is allocated to the usage pattern of the femtocell base station 100. [ For example

The use pattern of the femtocell base station 100 = Mod (PSC, r ) + 1

Can be followed.

Each of the femtocell base stations 100 communicates with the communication terminal 1 using any one of the generated usage patterns by the usage pattern assigning unit 730.

The communication unit 740 includes a communication interface and communicates with the femtocell base station 100 or the femtocell management system 300. The communication interface may include a wired or wireless communication interface.

The resource allocation apparatus 700 may be installed in each of the femtocell base stations 100, and each femtocell base station 100 may generate usage patterns individually.

The resource allocation apparatus 700 is installed in the femtocell management system 300. When the femtocell management system 300 generates the usage pattern and transmits the usage pattern to the individual femtocell base stations 100, The base station 100 can operate in a manner that uses the usage pattern.

All or part of the resource allocation apparatus 700 is installed in the femtocell management system 300 and the individual femtocell base stations 100 and the resource allocation variable is determined in the femtocell management system 300, When transmitting to the base stations 100, the individual femtocell base stations 100 may be operated in a manner of generating and using a usage pattern by using the resource allocation parameter.

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. In addition, the features described in the individual embodiments herein may be combined and implemented in a single embodiment. To the contrary, the various features described in the singular embodiments of the present disclosure may be implemented in various embodiments individually or in a suitable subcombination.

It is to be understood that, although the operations have been described in a particular order in the figures, it should be understood that such operations are performed in a particular order as shown, or that a series of sequential orders, or all described operations, . In some circumstances, multitasking and parallel processing may be advantageous. It should also be understood that the division of various system components in the above embodiments does not require such distinction in all embodiments.

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 invention as defined in the appended claims. The present invention is not limited to the drawings.

1: communication terminal 100: femtocell base station
200: femtocell gateway 300: femtocell management system
700: resource allocation device 710: resource allocation variable determination unit
720: usage pattern generating unit 730: usage pattern assigning unit
740:

Claims (14)

A resource allocation apparatus for controlling frequency resource interference between base stations,
A usage pattern generation unit for generating at least one usage pattern for a frequency frame composed of subframes divided by a predetermined time unit using a resource use rate and a pattern reuse index; And
And a usage pattern allocator for allocating at least one usage pattern generated by the usage pattern generator to a base station,
The resource use ratio is a ratio of the number of subframes used for actual data transmission to the total number of subframes,
Wherein the pattern reuse factor is a number of usage patterns generated orthogonally to each other. The method according to claim 1,
The usage pattern generation unit may generate,
And generates a usage pattern for activating a subframe at a period determined according to the resource usage rate and the pattern reuse index. 3. The method of claim 2,
The usage pattern generation unit may generate,
Wherein the period is determined according to Equation (1) below.
[Equation 1]
T = ceiling ( r / rho ). (Where T is the cycle, r is the pattern re-use factor, ρ is the proportion being the resource) The method according to claim 2 or 3,
The usage pattern generation unit may generate,
Wherein the first to r ( r is the pattern reuse index) usage pattern is generated,
In the first usage pattern, the subframe is activated according to the following equation (2)
And the use pattern up to the remaining r is shifted by the number of the subframes in accordance with the following equation (3).
[Equation 2]

(Where i is the identification number of the subframe, 0 to N-1, N is the number of divided subframes, and T is the period)
[Equation 3]

(Where r is the pattern reuse index, and r is the resource utilization ratio) 5. The method of claim 4,
The usage pattern allocating unit allocates,
And allocates the usage pattern to the base stations according to a remainder obtained by dividing an identification number of the base station by the pattern reuse index. 6. The method of claim 5,
The usage pattern allocating unit allocates,
And allocates the usage pattern to the base stations according to Equation (4) below.
[Equation 4]
Usage pattern assigned to the base station = Mod (base station identification number, r ) + 1. (where r is the pattern reuse index) A resource allocation method for controlling frequency resource interference between base stations,
Dividing a frequency frame into sub-frames of a constant time unit;
A usage pattern generation step of generating at least one usage pattern for the frequency frame using a resource use rate and a pattern reuse index; And
And allocating the generated at least one usage pattern to a base station,
The resource use ratio is a ratio of the number of subframes used for actual data transmission to the total number of subframes,
Wherein the pattern reuse index is a number of usage patterns generated orthogonally to each other. 8. The method of claim 7,
The usage pattern generating step may include:
And generates a usage pattern for activating a subframe at a period determined according to the resource usage rate and the pattern reuse index. 9. The method of claim 8,
The usage pattern generating step may include:
Wherein the period is determined according to Equation (1) below.
[Equation 1]
T = ceiling ( r / rho ). (Where T is the cycle, r is the pattern re-use factor, ρ is the proportion being the resource) 10. The method according to claim 8 or 9,
The usage pattern generating step may include:
Wherein the first to r ( r is the pattern reuse index) usage pattern is generated,
A first generating step of generating a first usage pattern in which a subframe is activated according to Equation (2) below; And
And a second generating step of generating the second to r ( r is the pattern reuse index) usage pattern by sequentially moving the first usage pattern by the number of the subframes according to the following expression (3) Resource allocation method.
[Equation 2]

(Where i is the identification number of the subframe, 0 to N-1, N is the number of divided subframes, and T is the period)
[Equation 3]

(Where r is the pattern reuse index, and r is the resource utilization ratio) 11. The method of claim 10,
Wherein the usage pattern allocating step comprises:
Wherein the usage pattern is allocated to the base stations according to a remainder obtained by dividing an identification number of the base station by the pattern reuse index. 12. The method of claim 11,
Wherein the usage pattern allocating step comprises:
Wherein the use pattern is allocated to base stations according to Equation (4) below.
[Equation 4]
Usage pattern assigned to the base station = Mod (base station identification number, r ) + 1. (where r is the pattern reuse index) A base station management system for determining a resource use ratio and a pattern reuse index and transmitting the resource usage ratio and the pattern reuse index to at least one of the following base stations; And
The at least one base station generating at least one usage pattern for a frequency frame composed of subframes divided by a predetermined time unit using the received resource use rate and pattern reuse index and using the usage pattern; Including,
The resource use ratio is a ratio of the number of subframes used for actual data transmission to the total number of subframes,
Wherein the pattern reuse factor is a number of usage patterns generated orthogonally to each other. A base station management system for generating at least one usage pattern for a frequency frame composed of subframes divided by a predetermined time unit using a resource use ratio and a pattern reuse index and transmitting the usage pattern to at least one of the following base stations ; And
And the at least one base station using the received usage pattern,
The resource use ratio is a ratio of the number of subframes used for actual data transmission to the total number of subframes,
Wherein the pattern reuse factor is a number of usage patterns generated orthogonally to each other.

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