KR101802064B1 - Base station and method of managing interference - Google Patents

Abstract

A base station interference management method is disclosed. One embodiment receives interference management capability information of at least one neighboring base station from the neighboring base station and determines whether support of the neighboring base station is necessary based on interference information of a cell including the base station, If it is determined that the neighboring base station is capable of interference management using the interference management capability information, it is determined whether resource division of the identified neighboring base station is allowed based on the interference management signaling performed with the verified neighboring base station And performing resource partitioning if the resource partitioning of the neighboring base station is permitted.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The following embodiments relate to a base station interference management method.

In 3GPP LTE, a base station called an evolved NodeB (eNB) is defined, and one base station can manage one cell or several cells. An X2 interface, which is a logical connection, may be provided for exchanging information between such eNBs.

The X2 interface can provide a data plane and a control plane interface. The data plane may be used to transmit user data when handover occurs, and the control plane may provide procedures such as handover control, load balancing, and cell activation for energy saving. The control plane is referred to as X2-AP (Application Protocol).

In the case of the conventional interference management method (or interference control method), the base station receives setting information from an OAM (Operation And Management) or SON (Self Organizing Networks) server and transmits a LOAD INFORMATION message 36.423, and 9.1.2.1) to the neighboring base station, thereby informing the neighboring base station of its own state.

If the interference management capability is different for each base station, the interference related information transmitted to the LOAD INFORMATION may become meaningless. Also, because the LOAD INFORMATION is not a handshake procedure, the interference management function may be performed or ignored depending on the capability of the base station receiving the LOAD INFORMATION.

An interference management method according to one aspect includes receiving interference management capability information of at least one neighboring base station from the neighboring base station; Determining whether support of the neighboring base station is necessary based on interference information of a cell including the base station; Identifying a neighboring base station capable of interference management using the interference management capability information if the support is required; Determining whether resource partitioning of the identified neighboring base station is allowed based on the interference management signaling performed with the neighboring base station; And performing resource partitioning if the resource partitioning of the identified neighboring base station is allowed.

Wherein the interference management capability information includes information on whether the neighboring base station can perform interference management in a frequency domain; Information on whether the neighboring base station can perform interference management in a time domain; Information on whether the neighboring base station uses a fractional frequency reuse (FFR) scheme when interference management is possible in the frequency domain; A mask for a physical resource block (PRB) to be protected in the downlink by the neighboring BS when the neighbor BS uses a hard FFR scheme; A mask for the PRB to be protected in the uplink by the neighboring BS when the neighbor BS uses the hard FFR scheme; And at least one of available ABS (Almost Blank Subframe) pattern information of the neighboring base station when the cell including the neighboring base station is a CSG (Closed Subscriber Group) cell.

Wherein the step of verifying whether the resource partitioning of the neighboring base station is allowed is further comprised of: transmitting a resource division request message to the identified neighboring base station; And receiving from the identified neighboring base station a response message including information on whether the resource partitioning of the identified neighboring base station is allowed.

The resource division request message may include at least one of a frequency division request and a time division request.

The resource division request message may further include information on a downlink resource block and an information on an uplink resource block that the identified neighboring base station desires not to use when the frequency division request is included, In case of including the division request, the base station may further include information on a desired ABS pattern.

The response message may include at least one of information indicating whether frequency division is permitted or information indicating whether time division is permitted.

If the frequency division is allowed, the acknowledgment message may further include information on downlink resource blocks and uplink resource blocks to be not used by the identified neighboring base station, , It may further include ABS pattern information set by the identified neighboring base station.

If the resource partitioning is not permitted, determining whether to hold the cell may further include determining whether to hold the cell.

The interference management capability information of the neighboring base station may be included in the X2 setup signaling message.

The step of receiving the interference management capability information of the neighboring base station may include receiving interference management capability information of the neighboring base station when the base station and the neighboring base station are connected to the X2 interface.

Another aspect of the present invention provides an interference management method comprising: transmitting interference management capability information of a base station to at least one neighboring base station; Receiving a resource division request message from the neighboring base station if support for interference management of a cell including the neighboring base station is required; Transmitting a response message including information indicating whether resource partitioning of the base station is allowed to the neighboring base station; And performing resource partitioning when the resource partitioning is permitted.

Wherein the interference management capability information includes information on whether the base station can perform interference management in a frequency domain; Information on whether or not the base station can perform interference management in a time domain; Information on whether the base station uses a fractional frequency reuse (FFR) scheme when interference management is possible in the frequency domain; A mask for a physical resource block (PRB) to be protected in the downlink when the base station uses a hard FFR scheme; A mask for the PRB to be protected in the uplink when the base station uses the hard FFR scheme; And information on a usable ABS (Almost Blank Subframe) pattern when the cell including the BS is a CSG (Closed Subscriber Group) cell.

The resource division request message may include at least one of a frequency division request and a time division request.

The resource division request message may further include information on a DL resource block that the BS desires not to use and information on an UL resource block when the frequency division request is included, The neighboring base station may further include information on a desired ABS pattern.

The response message may include at least one of information indicating whether frequency division is permitted or information indicating whether time division is permitted.

The response message may further include information on a downlink resource block and an uplink resource block to be unused by the base station, when the frequency division is allowed, and when the time division is allowed, And may further include ABS pattern information set by the base station.

The interference management capability information of the base station may be included in the X2 setup signaling message.

The step of transmitting the interference management capability information of the base station may include transmitting the interference management capability information of the base station when the base station and the neighboring base station are connected to the X2 interface.

A base station according to one side receives interference management capability information of at least one neighbor base station from the neighbor base station; And determining whether neighboring base station support is necessary based on interference information of a cell including the base station, and when the support is required, checking neighboring base stations that can perform interference management using the interference management capability information Determining whether resource partitioning of the identified neighboring base station is allowed based on the interference management signaling performed with the neighboring base station verified; and if resource division of the checked neighboring base station is permitted, And a controller to perform the operation.

The base station according to the other side transmits the interference management capability information of the base station to at least one neighboring base station and if a support for interference management of the cell including the neighboring base station is required, A communication interface for receiving from the base station a response message including information indicating whether resource partitioning of the base station is allowed; And a controller for performing resource division allocation when the resource division is permitted.

According to the embodiment, by exchanging the X2-AP message including the interference management capability information, the base station and the neighboring base station can provide a more efficient interference management function than the conventional interference management function (or interference control function) have.

1 is a diagram for explaining a network according to an embodiment.
2 is a flowchart illustrating an X2 setup procedure according to an exemplary embodiment of the present invention.
3 to 4 are flowcharts for explaining the exchange of interference management capability information according to an embodiment.
5 is a flowchart illustrating an interference management method according to an embodiment of the present invention.
6 is a flowchart for explaining an example of an interference management method according to an embodiment.
7 is a flowchart for explaining another example of the interference management method according to an embodiment.
8 is a block diagram for explaining an example of a base station according to an embodiment.
9 is a block diagram for explaining another example of a base station according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

1 is a diagram for explaining a network according to an embodiment.

Referring to FIG. 1, a plurality of small cells may be located within macrocell 110 coverage. Similarly, a plurality of small cells may be located within the macro cell coverage 120. Thus, a network composed of different types of cells is called a heterogeneous network (HetNet).

The macro base station 111 and the plurality of small base stations 112 to 115 may be logically connected. Likewise, the macro base station 121 and the plurality of small base stations 122 to 125 may be logically connected. For example, the macro base station 111 and the plurality of small base stations may be connected to the X2 interface 130. Here, the X2 interface 130 is an IP (Internet Protocol) -based interface.

The X2-AP (Application Protocol) corresponding to the control plane of the X2 interface 130 can perform handover, load balancing, and interference management (IM) by transmitting and receiving control information between the base stations .

1, the macro base station 111 and the plurality of small base stations 112 to 115 are connected to the macro base station 121 and the plurality of small base stations 122 to 125 located in the macro cell 120, (Not shown).

The macro base station 111 and the plurality of small base stations 112 to 115 may be physically connected. For example, the macro base station 111 and the plurality of small base stations 112 to 115 may be connected to an optical fiber, a gigabit passive optical networking (GPON), or a digital subscriber line (DSL).

2 is a flowchart illustrating an X2 setup procedure according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the base station can perform preparations to establish an X2 connection. For example, the base station can search for a neighboring base station (210) and obtain an Internet Protocol (IP) address of a neighboring base station (220).

When the IP address of the neighboring base station is acquired, X2 setup signaling can be performed. More specifically, the base station may send an X2 SETUP REQUEST message to the neighboring base station (230). The neighboring base station may transmit an X2 SETUP RESPONSE message to the base station (240). As a result, an X2 interface can be established between the base station and the neighboring base station.

The X2 setup request message and the X2 setup response message may include information of a cell operated by the corresponding base station or a cell to be operated. For example, the X2 setup request message includes a Physical Cell ID (PCI), a frequency band, a Tracking Area, neighboring cell information, PRACH (Physical Random Access Channel) setting information, a MBSFN subframe information , A CSG (Closed Subscriber Group) ID, and a multi-band information list. Similarly, the X2 setup response message includes a Physical Cell ID (PCI), a frequency band, a Tracking Area, neighbor cell information, PRACH (Physical Random Access Channel) setup information, MBSFN subframe information, A CSG (Closed Subscriber Group) ID, and a multi-band information list. Here, neighboring cell information, PRACH setting information, MBSFN subframe information, CSG ID, and multi-band information list may be optional. However, when the base station and / or the neighboring base station is to operate or operate the CSG cell and / or the hybrid cell, the X2 setup request message and / or the X2 setup response message must necessarily include the CSG ID.

3 to 4 are flowcharts for explaining the exchange of interference management capability information according to an embodiment.

3, the base station can include the base station's own IM capability information in the X2 setup request message and transmit the X2 setup request message to the neighbor base station (310). For example, as shown in Table 1 below, the interference management capability information of the base station can be included in the IE (Information Element) of the Served Cell Information of the X2 setup request message of TS 36.423.

IE / Group Name Presence Range IE type and
reference Semantics
description PCI M INTEGER
(0..503, ...) Physical Cell ID Cell ID M ECGI
9.2.14 TAC M OCTET
STRING (2) Tracking Area
Code IM Capability O Broadcast PLMNs 1 .. <maxnoof
BPLMNs> Broadcast
PLMNs > PLMN Identity M CHOICE EUTRA-Mode-
Info M   > FDD     >> FDD Info One

The neighboring base station may transmit the interference management capability information of the neighboring base station to the base station by including it in the X2 setup response message (320). For example, the interference management capability information of a neighboring base station may be included in an IE (Information Element) of Served Cell Information in an X2 setup response message of TS 36.423.

In the example shown in FIG. 3, the base station and the neighboring base station can exchange interference management capability information through X2 setup signaling.

Referring to FIG. 4, the base station may transmit an X2 setup request message to a neighboring base station (410) and receive an X2 setup response message from a neighboring base station (420). After the X2 interface is established, the base station can provide its own interference management capability information to the neighboring base station (430). The neighboring base station can confirm the interference management capability information of the base station. A message indicating that it has been confirmed may be transmitted to the base station (440).

Although not shown in FIG. 4, the neighboring base station can provide its own interference management capability information to the base station, and the base station can transmit a message indicating that the interference management capability information of the neighboring base station has been confirmed to the neighboring base station.

In the case of the example shown in FIG. 4, unlike the example shown in FIG. 3, the base station and neighboring base stations can exchange interference management capability information after the X2 interface is established.

The interference management capability information may include parameters for whether interference management can be performed in the frequency domain and parameters for whether interference management can be performed in the time domain. Accordingly, the base station can inform the neighboring base station whether it is capable of interference management in the frequency domain and interference management in the time domain. Likewise, the neighboring base station can inform the base station whether it can perform frequency domain interference management and time domain interference management.

In addition, the interference management capability information may further include a plurality of parameters in addition to the parameters. An example of parameters included in the interference management capability information is shown in Table 2 below.

parameter Explanation FreqEnable Is it possible to manage interference in the frequency domain? TimeEnable Is it possible to manage interference in time domain? FreqHardFFR Whether FFR (Fractional Frequency Reuse) is used in frequency domain interference management DLProtectedPRB In the case of HardFFR, a mask for a physical resource block (PRB) to be protected in the downlink, ULProtectedPRB In the case of HardFFR, the mask for the PRB to be protected in the uplink ABSInformation For the CSG cell, information about available ABS patterns

The base station can generate the interference management capability information by setting each parameter of Table 2. For example, a base station capable of performing frequency domain interference management using hard FFR can set FreqEnable and FreqHardFFR to a predetermined value (for example, 1), and the base station can mask the PRB to be protected in the downlink, The PRB to be protected in the uplink can be masked. Also, a base station capable of ABS (Almost Blank Subframe) among the enhanced Inter-Cell Interference Coordination (eICIC) can set TimeEnable to a predetermined value (for example, 1). If the cell of the base station is a CSG cell, the base station can set information about the available ABS pattern. Similarly, the neighboring base station can set the respective parameters of Table 2 to generate interference management capability information.

5 is a flowchart illustrating an interference management method according to an embodiment of the present invention.

Referring to FIG. 5, the first base station may obtain interference management capability information of at least one neighbor base station (510). Herein, the neighboring base station may include a second base station. For example, the first base station may obtain interference management capability information of a neighboring base station that includes the parameters of Table 2. As described above, the first base station can acquire the interference management capability information of the neighbor base station through X2 setup signaling. Also, the first base station may acquire the interference management capability information from the neighboring base station after establishing the X2 interface with the neighboring base station.

The second base station may obtain interference management capability information of the at least one neighbor base station (520). Here, the neighboring base station may include a first base station.

The first base station may update the interference information in the cell (530).

The second base station may update the interference information in the cell (540).

The first base station may determine whether assistance or assistance of the neighbor base station is needed based on the interference information in its cell. If the interference in the cell of the first base station is severe and the assistance or support of the neighboring base station is required, the first base station can determine whether interference management of the neighboring base station is possible using the interference management capability information of the neighboring base station (550). In other words, the first base station can confirm whether the neighboring base station supports the interference management function using the interference management capability information of the neighboring base station. For example, the first base station can determine whether the neighboring base station can perform frequency domain interference management (e.g., FFR) or time domain interference management (e.g., eICIC ABS).

If there is no neighboring base station supporting the interference management function, the first base station may determine whether to hold the cell (562). For example, if there is no neighboring base station supporting the interference management function, the first base station can decide whether to keep the cell or to turn off the cell considering at least one of the number of users and the amount of traffic.

And the second base station among the neighbor base stations supports the interference management function.

The first base station may send a resource partitioning request message to the second base station (551). In other words, the first base station can send an interference management request (IM REQUST) to the second base station.

The second base station may transmit the response message to the first base station in consideration of at least one of the interference information, the number of users, and the traffic amount in its own cell (552). In other words, the second base station may send an interference management response (IM RESPONSE) to the first base station.

An example of the IE of IM REQUST and IM RESPONSE is shown in Table 3 below.

IE IM REQUEST Description IM RESPONSE Description FreqIM When requesting frequency division, If frequency division is allowed, > DLPRB The location of the downlink PRB desired to be avoided by the base station receiving the IM REQUEST Location of downlink PRB not to be used > ULPRB The location of the uplink PRB desired to be avoided by the base station receiving the IM REQUEST Location of uplink PRB not to be used TimeIM If you are requesting a time slice, Set if time splitting is allowed > ABSPattern ABS pattern you want to set ABS pattern set

The first base station may set FreqIM to a predetermined value (for example, 1) when requesting frequency division from the second base station, and may set the downlink resource block and the uplink resource block You can include the information in the IM REQUEST. When the first base station requests time division to the second base station, it can set the TimeIM to a predetermined value (for example, 1), and the first base station can include information on the desired ABS pattern in the IM REQUEST have.

When the second base station receives the IM REQUEST from the first base station, the second base station can confirm that resource division is allowed based on its cell state. The cell state may include, for example, at least one of interference information within the cell, the number of users, and the amount of traffic. For example, the second base station may consider at least one of frequency division and time division based on the cell state to aid interference management of the first base station. Allowing resource partitioning may mean that the second base station is going to perform resource partitioning, and not allowing resource partitioning may mean that the second base station is not going to perform resource partitioning.

In other words, the second base station can determine whether to perform resource partitioning based on its cell state to help the interference management of the first base station. If the frequency division is allowed in consideration of the cell state, the second base station can set the FreqIM to a predetermined value (for example, 1), and the downlink resource block and the uplink resource block Can be included in the IM RESPONSE. If frequency division of the second base station is not allowed in consideration of the cell state of the second base station, the second base station may set FreqIM to another value (for example, 0). If the time division is allowed considering the cell state, the second base station can set the TimeIM to a predetermined value (e.g., 1), and the information about the ABS pattern set by the second base station itself is included in the IM RESPONSE . If time division of the second base station is not allowed, the second base station may set the TimeIM to another value (e.g., 0).

The first base station may perform interference management signaling, i.e., send and receive IM REQUST and IM RESPONSE, and may determine (560) whether resource partitioning of the second base station is allowed based on the interference management signaling. For example, the first base station may determine via the IM RESPONSE whether the second base station is to perform frequency division or time division. In addition, the first base station can confirm via the IM RESPONSE that the second base station does not wish to perform resource partitioning.

If resource partitioning of the second base station is allowed, the first base station may perform resource partitioning (561). For example, if the second base station determines to perform frequency division, the first base station may perform frequency division assignment.

If resource partitioning of the second base station is not allowed, the first base station may determine whether to hold the cell (562). For example, if the second base station decides not to perform resource partitioning, the first base station may determine whether to keep or turn off its cell in consideration of its cell state.

The second base station may perform resource partitioning (570). Accordingly, the first base station and the second base station can perform resource allocation and provide a service to the terminal.

According to one embodiment, the X2-AP message may include the interference management capability information described above, and the base station and the neighboring base station may exchange the X2-AP message including the interference management capability information, A more efficient interference management function than the management function (or interference control function) can be provided.

6 is a flowchart for explaining an example of an interference management method according to an embodiment.

The interference management method of FIG. 6 can be performed by the base station. Here, the base station can correspond to the first base station in Fig.

Referring to FIG. 6, a base station can receive interference management capability information of at least one neighboring base station from a neighboring base station (610). The interference management capability information may be included in the X2 setup signaling message. Here, the X2 setup signaling message may be an X2 setup request message or an X2 setup response message. In addition, the base station can receive the interference management capability information from the neighboring base station after the X2 interface is established.

The base station can transmit its interference management capability information to the neighboring base stations.

The base station may determine whether support of the neighboring base station is necessary based on the interference information of its own cell (620).

If it is necessary to support the neighboring base station, the base station can identify the neighboring base station capable of interference management using the interference management capability information (630).

Based on the interference management signaling performed with the identified neighboring base station, the base station may determine whether resource partitioning of the identified neighboring base station is allowed (640). The identified neighboring base station may correspond to the second base station of FIG. The interference management signaling represents the exchange process of IM REQUEST and IM RESPONSE described above.

In one embodiment, the IM RESPONSE may include at least one of first information indicating whether frequency division of the identified neighboring base station is permitted and second information indicating whether the identified neighboring base station is allowed to time division. The first information may be FreqIM of Table 3 above, and the second information may be TimeIM of Table 3 above.

If resource partitioning of the identified neighboring base station is allowed, the base station may perform resource partitioning (650). If the identified neighboring base station determines to perform resource partitioning, the base station can perform resource partitioning. Similarly, the identified neighboring base station can perform the resource division assignment according to the determination. The base station and the identified neighboring base station can perform resource allocation and provide a service to the terminal.

1 to 5 can be applied to the matters described with reference to FIG. 6, so that detailed description will be omitted.

7 is a flowchart for explaining another example of the interference management method according to an embodiment.

The interference management method of FIG. 7 can be performed by the base station. Here, the base station can correspond to the second base station in Fig.

Referring to FIG. 7, a base station may transmit its interference management capability information to at least one neighboring base station (710).

The neighboring base station may need support for interference management of its own cell. In this case, the neighboring base station can transmit a resource division request message to the base station. That is, the BS can receive a resource division request message from the neighbor BS (720).

The base station may transmit 730 a response message to the neighboring base station including information indicating whether its resource partitioning is allowed. As described above, the base station may send an IM RESPONSE to the neighboring base station.

If resource partitioning of the base station is allowed, the base station may perform resource partitioning (740). Similarly, the neighboring base station can perform resource division assignment. The base station and the neighboring base station can perform resource division and provide services to the terminal.

1 to 6 can be applied to the matters described with reference to FIG. 7, and thus detailed description thereof will be omitted.

8 is a block diagram for explaining an example of a base station according to an embodiment.

The base station 800 of FIG. 8 can correspond to the first base station described with reference to FIG.

Referring to FIG. 8, a base station 800 includes a communication interface 810 and a controller 820.

Communication interface 810 may receive interference management capability information of at least one neighboring base station from a neighboring base station. The communication interface 810 may include, for example, an interface for X2 connection with a neighboring base station.

The controller 820 may determine whether support of the neighboring base station is necessary based on the interference information of the cell including the base station 800. [

If it is necessary to support the neighboring base station for interference control of the cell, the controller 820 can identify the neighboring base station capable of interference management using the interference management capability information.

Controller 820 can determine whether resource partitioning of the identified neighboring base station is allowed based on the interference management signaling performed with the identified neighboring base station.

The controller 820 may perform resource partitioning if resource partitioning of the identified neighboring base station is allowed.

1 to 6 can be applied to the matters described with reference to FIG. 8, so that a detailed description will be omitted.

9 is a block diagram for explaining another example of a base station according to an embodiment.

The base station 900 of FIG. 9 may correspond to the second base station described with reference to FIG.

9, the base station 900 includes a communication interface 910 and a controller 920.

The communication interface 910 may transmit the interference management capability information of the base station to at least one neighboring base station. The communication interface 910 may include, for example, an interface for X2 connection with a neighboring base station.

The communication interface 910 may receive a resource division request message from a neighboring base station when support for interference management of a cell including a neighboring base station is required.

The communication interface 910 may transmit a response message to the neighboring base station including information indicating whether resource partitioning of the base station is allowed.

The controller 920 can perform resource division allocation when resource division is allowed.

1 through 6 can be applied to the matters described with reference to FIG. 9, so that a detailed description will be omitted.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA) , A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI &gt; or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (20)

In an interference management method of a base station,
Receiving interference management capability information of at least one neighboring base station from the neighboring base station;
Determining whether support of the neighboring base station is necessary based on interference information of a cell including the base station;
Identifying a neighboring base station capable of interference management using the interference management capability information if the support is required;
Determining whether resource partitioning of the identified neighboring base station is allowed based on the interference management signaling performed with the neighboring base station; And
Performing resource partitioning if the resource partitioning of the neighboring base station is permitted;
Lt; / RTI &gt;
The interference management capability information includes:
Information on whether the neighboring base station uses a fractional frequency reuse (FFR) scheme when the neighboring base station can perform interference management in a frequency domain; And
If the neighboring BS uses a hard FFR scheme, the neighbor BS may mask the physical resource block (PRB) to be protected in the downlink and the PRB to be protected in the uplink Mask
/ RTI &gt;
A method for managing interference of a base station.
The method according to claim 1,
The interference management capability information includes:
Information on whether the neighboring base station can perform interference management in a frequency domain;
Information on whether the neighboring base station can perform interference management in a time domain; And
When the cell including the neighboring base station is a CSG (Closed Subscriber Group) cell, the available ABS (Almost Blank Subframe) pattern information
&Lt; / RTI &gt;
A method for managing interference of a base station.
The method according to claim 1,
Wherein the step of verifying whether or not the resource partitioning of the identified neighboring base station is allowed,
Transmitting a resource division request message to the identified neighboring base station; And
Receiving from the identified neighboring base station a response message including information on whether the resource partitioning of the identified neighboring base station is allowed;
/ RTI &gt;
A method for managing interference of a base station.
The method of claim 3,
The resource division request message includes:
A frequency division request and a time division request,
And further comprising information on a downlink resource block and an information on an uplink resource block that the identified neighboring base station desires not to use if the frequency division request is included,
Wherein the base station further includes information on a desired ABS pattern when the base station includes the time division request,
A method for managing interference of a base station.
In an interference management method of a base station,
Transmitting interference management capability information of a base station to at least one neighboring base station;
Receiving a resource division request message from the neighboring base station if support for interference management of a cell including the neighboring base station is required;
Transmitting a response message including information indicating whether resource partitioning of the base station is allowed to the neighboring base station; And
If the resource partition is allowed, performing a resource partition allocation
Lt; / RTI &gt;
Wherein the interference management capability information includes information on whether the base station uses a fractional frequency reuse (FFR) scheme when the base station can perform interference management in a frequency domain; And
When the base station uses a hard FFR scheme, the base station transmits a mask for a physical resource block (PRB) to be protected in the downlink and a mask for a PRB to be protected in the uplink
/ RTI &gt;
A method for managing interference of a base station.
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