KR20150007442A - Method and Apparatus of Interference Management Scheme based on Resource Allocation in Heterogeneous Network - Google Patents

Method and Apparatus of Interference Management Scheme based on Resource Allocation in Heterogeneous Network Download PDF

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KR20150007442A
KR20150007442A KR20130081339A KR20130081339A KR20150007442A KR 20150007442 A KR20150007442 A KR 20150007442A KR 20130081339 A KR20130081339 A KR 20130081339A KR 20130081339 A KR20130081339 A KR 20130081339A KR 20150007442 A KR20150007442 A KR 20150007442A
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South Korea
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base station
allocated
macro
macro cell
interference management
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KR20130081339A
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Korean (ko)
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문상미
김보라
말리크 사란쉬
황인태
이칠우
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전남대학교산학협력단
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Publication of KR20150007442A publication Critical patent/KR20150007442A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

The present invention relates to an interference management method based on resource allocation in a heterogeneous network and an apparatus thereof. Provided are a macro base station for interference management based on resource allocation in a heterogeneous network which includes a control part which uses all frequency regions and allocates a transmission resource not to use a part of the transmission resource in a time region, to communicate with a user device located in the center region of a macro cell; and a communication part which communicates with the user device according to the allocated transmission resource, and a method thereby. Also, provided are a pico base station for interference management based on resource allocation in a heterogeneous network which includes a control module which uses all frequency regions and allocates a transmission resource not to use a part of the transmission resource in a time region to communicate with a user device located in the center region of a macro cell, when it is located in the center region of the macro cell; and a communication module which communicates with the user device according to the allocated transmission resource, and a method thereby.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for interference management through resource allocation in a heterogeneous network,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to interference management techniques, and more particularly, to co-tier interference and cross-tier interference cancellation in a heterogeneous network based on an LTE-Advanced system.

Recently, the demand of users who want to receive high quality data service anytime and anywhere due to the spread of smart phones is rapidly increasing. Therefore, there is a need for a technique capable of supporting a high data rate not only at the cell center but also at the cell edge.

Although the cell center can simply increase the data transmission rate by supporting additional antenna ports for each cell, since the cell edge is greatly influenced by the interference from neighboring cells, the data rate is increased beyond a certain limit without intercellular cooperation It is difficult.

In order to provide a high-speed data service even in a dense region, frequency reuse techniques using a small cell such as a picocell or a femtocell in the area of a macro cell have been widely used. Thus, there is a need for an efficient interference control method between transmission points. Is increasing.

An object of the present invention is to provide a method and an apparatus for allocating resources for eliminating interference to a user equipment (UE) and a base station using SFR (Soft Frquency Reuse) and ABS (Almost Blank Subframe) .

According to another aspect of the present invention, there is provided a macro base station for interference management through resource allocation in a heterogeneous network, A control unit for allocating transmission resources so as not to use a part of transmission resources in a time domain; And a communication unit for communicating with the user equipment according to the allocated transmission resources.

The controller divides an edge region into a plurality of sectors for communication with a user device located in an edge region of a macro cell and assigns frequency subbands allocated in advance to each sector as transmission resources.

According to an aspect of the present invention, there is provided a pico base station for interference management through resource allocation in a heterogeneous network, the base station comprising: A control module for allocating transmission resources not used by the macro base station among the transmission resources of the area; And a communication module for communicating with the user equipment according to the allocated transmission resource.

Wherein when the control module is located in one sector in an edge region of a macro cell divided into a plurality of sectors, the control module determines transmission resources using the remaining subbands excluding the frequency subbands used by the macro base station .

According to another aspect of the present invention, there is provided a method for interference management through resource allocation in a heterogeneous network of a macro base station, Allocating a transmission resource using a frequency domain but not using a part of transmission resources in a time domain; And communicating with the user equipment according to the allocated transmission resource.

The step of allocating transmission resources may include dividing an edge region into a plurality of sectors for communication with a user device located in an edge region of a macro cell and assigning frequency subbands allocated in advance to each sector as transmission resources .

According to an aspect of the present invention, there is provided a method for interference management through resource allocation in a heterogeneous network of a pico base station, including the steps of: Allocating transmission resources not used by the macro base station among transmission resources in the time domain; And communicating with the user equipment according to the allocated transmission resource.

Wherein the step of allocating the transmission resources comprises the steps of: when a sector is located in one sector in an edge region of a macro cell divided into a plurality of sectors, using the remaining sub-bands excluding the frequency sub- And allocates transmission resources.

According to the interference management method according to the embodiment of the present invention, the reception SINR performance of the entire user equipment can be improved. In addition, the spectral efficiency performance of the macrocell user device and the picocell user device can be improved.

1 is a diagram for explaining a method for managing inter-cell interference according to an embodiment of the present invention.
2 is a diagram for explaining a method for managing inter-cell interference according to an embodiment of the present invention.
3 is a diagram for explaining a communication system for interference management according to an embodiment of the present invention.
4 is a block diagram for explaining an internal configuration of a macro base station according to an embodiment of the present invention.
5 is a block diagram illustrating an internal configuration of a pico base station according to an embodiment of the present invention.
6 is a flowchart illustrating a method for managing inter-cell interference of a macro base station according to an embodiment of the present invention.
7 is a flowchart illustrating a method for managing inter-cell interference of a pico base station according to an embodiment of the present invention.
8 is a graph showing a received SINR cumulative distribution function (CDF) of a macrocell user.
9 is a graph showing the received SINR CDF of the picocell user equipment.
10 is a graph showing the received SINR CDF of a total user equipment combining a macrocell user device and a picocell user device.
11 and 12 are graphs showing the spectral efficiency CDFs of the macro cell user and the picocell user, respectively.
13 is a graph showing the spectral efficiency CDF of the entire user.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings may be exaggerated, omitted or schematically shown.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. In addition, since the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, they are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

The present invention proposes a technique for managing inter-cell interference by allocating resources in a frequency domain and a time domain. According to the present invention, resources are allocated based on the SFR in the frequency domain, and resources are allocated based on the ABS in the time domain.

1 is a diagram for explaining a method for managing inter-cell interference according to an embodiment of the present invention.

Referring to FIGS. 1 (a) and 1 (b), according to an embodiment of the present invention, a frequency band is allocated in a macro cell and a picocell based on SFR in a frequency domain. As shown in the figure, the macro cell coverage is divided into a cell center region (hereinafter abbreviated as a "center region") and a cell edge region (hereinafter referred to as an "edge region" , Respectively, denoted as C1, C2 and C3 and E1, E2 and E3, respectively. It is assumed that the entire frequency band is divided into three sub-bands, i.e., frequency sub-bands A, B and C. In the macro cell, different frequency subbands are allocated according to the macro cell area based on the SFR. In the center region, the frequency reuse factor of 1 is used, while in the edge region, the frequency reuse factor of 3 is used. Therefore, the entire frequency band is used in the C1, C2, and C3 regions, and the frequency subbands A, B, and C are used in the edge regions E1, E2, and E3, respectively. Also, in the case of the center area in the macro cell, transmission power is lowered and transmitted, thereby increasing the overall system efficiency.

1 (b) shows the transmission resource allocation for the edge region of the macrocell. In this situation, the picocell selects a subband that is not used in the macrocell area. For example, when the picocell is in the E1 region, the macrocell uses the frequency A subbands, and so uses the B and C subbands. However, since all the frequency bands are used in the center area of the macro cell, all the frequency bands are used when the picocell is in the center area of the macro cell. Table 1 summarizes these results.

domain Sector Macro base station
Frequency used Pico base station
Frequency used Center area C1 Sub-band A, B, C Sub-band A, B, C C2 Sub-band A, B, C Sub-band A, B, C C3 Sub-band A, B, C Sub-band A, B, C Edge area E1 Sub band A Sub band B, C E2 Sub band B Sub band A, C E3 Sub band C Sub-band A, B

2 is a diagram for explaining a method for managing inter-cell interference according to an embodiment of the present invention.

As described in FIG. 1, when resources are allocated in the frequency domain, resource allocation in the frequency domain is performed in all the frequency bands when the picocell is in the central region of the macrocell, The interference problem still exists. Therefore, according to the embodiment of the present invention, as shown in FIG. 2, additionally allocating resources by applying ABS in a time domain solves cross-tier interference. That is, the interfering macrocell uses ABS, which does not transmit signals during some subframes for picocells that are more susceptible to interference. Thus, the picocell can transmit interference during the ABS period of the macrocell to avoid interference.

For example, as shown in the figure, when there are subframes 0 to 8, the macro base station MeNB uses subframes 0, 1, 3, 6 and 8 as transmission resources and subframes 2, 4, 5 and 7 Use ABS. Accordingly, the pico base station (PeNB), which is interfered with in the central region of the macrocell, can use the subframes 2, 4, 5, and 7 as transmission resources.

3 is a diagram for explaining a communication system for interference management according to an embodiment of the present invention.

Referring to FIG. 3, a communication system according to an embodiment of the present invention includes a macro base station 100, a pico base station 200, and a user equipment 300.

Here, the macro base station 100 is a base station serving a radio section of the macro cell coverage 31, and the pico base station 200 is a base station serving a radio section of the pico cell coverage 33. As a preferred example, the macro base station 100 may be a base station having a cell coverage within 5 km. Also, the pico base station 200 may be a base station having a cell coverage within 0.5 km. However, the present invention is not limited thereto,

The macro base station 100 represents a base station having a wider range of cell coverage than the pico base station 200 and the pico base station 200 represents a base station having a narrower range of cell coverage than the macro base station 100. [ Therefore, it should be understood that the function or operation of the pico base station 200 in this document can be applied to a femto base station (e.g., HeNB) serving a femtocell region.

1 to 3, the macro base station 100 allocates the same transmission resources in the central area of the macrocell, and allocates different transmission resources (subbands) according to each sector in the edge area of the macrocell .

For example, as shown in Fig. 1 (b), subbands having different frequencies are allocated to each sector of the cell in the edge region of the macrocell. For example, the macro base station 100 uses different frequencies, frequency A subbands, frequency B subbands, and frequency C subbands, respectively, in sector 1, sector 2 and sector 3. In this situation, the pico base station 200 selects an unused subband in the macro cell area. For example, when the pico base station 200 is in the E1 region, the macro base station 100 uses the frequency A subbands, and therefore uses the B and C subbands.

However, since the macro base station 100 uses all the frequency bands in the central area of the macro cell, the macro base station 100 can use the entire frequency band when the pico base station 200 is installed in the central area of the macro cell. However, when the pico base station 200 is located in the center area of the macrocell, since the resource allocation in the frequency domain is performed in all the frequency bands, the interference problem between the macrocell and the picocell still exists. Therefore, according to the embodiment of the present invention, the femto base station 100 allocates resources by applying ABS in the time domain, and the pico base station 200 allocates transmission resources during the ABS period of the macro base station 200 to avoid interference . Referring to FIG. 2, when there are subframes 0 to 8, the macro base station 100 uses the subframes 0, 1, 3, 6 and 8 as transmission resources, and the subframes 2, 4, Lt; / RTI > Accordingly, the pico base station 200 that is interfered with in the central region of the macrocell uses the subframes 2, 4, 5, and 7 as transmission resources.

4 is a block diagram for explaining an internal configuration of a macro base station according to an embodiment of the present invention.

4, a macro base station 100 according to an exemplary embodiment of the present invention includes a communication unit 110, a storage unit 120, and a control unit 130. Referring to FIG.

The communication unit 110 is for communicating with the user device 300. In particular, the communication unit 110 communicates with the user device 300 according to the transmission resources allocated by the control unit 130. [ The communication unit 110 receives a signal from the control unit 130 and converts the received signal into an RF band from a base band (BB) and transmits the RF band. Further, it converts the received RF band signal into a base band and provides it to the controller 130. The communication unit 110 may control transmission power under the control of the control unit 130. [

The storage unit 120 is for storing data to be transmitted to the user device 300. The storage unit 120 may store programs and data necessary for the overall operation of the macro base station according to the embodiment of the present invention. In particular, the storage unit 120 may store data received from an upper network node according to a terminal or a service.

The controller 130 controls the overall operation of the macro base station according to the embodiment of the present invention. In particular, the control unit 130 according to the embodiment of the present invention allocates transmission resources, and transmits data to the communication unit 110 according to the allocated transmission resources, and transmits the data to the user equipment 300. In particular, the control unit 130 can control the transmission power of the communication unit 110 according to the allocated transmission resources. That is, the control unit 130 may allocate transmission resources so as not to use some of the transmission resources in the time domain, in order to communicate with the user equipment 300 located in the central area of the macro cell . In addition, the controller 130 may divide the edge region into a plurality of sectors for communication with a user device located in the edge region of the macrocell, and allocate the frequency sub-band allocated in advance to each sector as a transmission resource. At this time, if the transmission resource is not allocated, the controller 130 may reduce the transmission power or turn off the transmission power.

5 is a block diagram illustrating an internal configuration of a pico base station according to an embodiment of the present invention.

5, a pico base station 200 according to an exemplary embodiment of the present invention includes a communication module 210, a storage module 220, and a control module 230.

The communication module 210 is for communication with the user device 300. In particular, the communication module 210 communicates with the user device 300 according to the transmission resource allocated by the control module 230. The communication module 220 receives a signal from the control module 230, converts the received signal into an RF band from a base band (BB), and transmits the RF band. Also, the communication module 220 converts the received RF band signal into a base band and provides it to the controller 130. The communication module 220 may control the transmission power under the control of the control module 230.

The storage module 220 is for storing data to be transmitted to the user device 300. The communication module 220 may store programs and data necessary for the overall operation of the pico base station 200 according to the embodiment of the present invention. In particular, the storage module 220 may store data received from an upper network node according to a terminal or a service.

The control module 230 controls the overall operation of the pico base station according to an embodiment of the present invention. In particular, the control module 230 according to an embodiment of the present invention allocates transmission resources, and transmits data to the communication module 210 according to the allocated transmission resources, and transmits the data to the user device 200. In particular, the control module 230 may control the transmission power of the communication unit 110 according to the allocated transmission resources.

In particular, when the pico base station 200 is located in the central area of the macro cell, the control module 230 allocates transmission resources not used by the macro base station 100 among the transmission resources in the time domain, can do. In addition, when the control module 230 is located in one of the sectors in the edge region of the macro cell divided into a plurality of sectors, the control module 230 determines the remaining sectors except for the frequency sub- Transmission resources can be allocated using a station. At this time, the control module 230 may reduce the transmission power or turn off the transmission power in the case of unallocated transmission resources.

6 is a flowchart illustrating a method for managing inter-cell interference of a macro base station according to an embodiment of the present invention.

Referring to FIG. 6, the controller 130 allocates transmission resources for a plurality of user equipments 300 in step S610. At this time, for the user equipment 300 located in the central area of the macro cell, the control unit 130 allocates transmission resources so that some of the transmission resources in the time domain are not used. For the user equipment located in the edge region of the macro cell, the controller 130 divides the edge region into a plurality of sectors, and allocates the frequency sub-band allocated in advance to each sector as a transmission resource.

Next, the controller 130 communicates with the corresponding user device 300 through the transmission resource allocated through the communication unit 110 in step S620. At this time, the control unit 130 may control the communication unit 110 to reduce the transmission power or turn off the transmission power in the case of unallocated transmission resources.

In the embodiment of the present invention, the control unit 130 allocates the transmission resources as in step S610 by allocating transmission resources (data channels) to be used by the respective user devices 300 through the scheduling And indicating the allocated transmission resources for each user equipment 300 over the control channel. Here, the control channel may be a physical downlink control channel (PDCCH), and the data channel may be a physical downlink shared channel (PDSCH). The control unit 130 communicates through the allocated transmission resource as in step S620. That is, the control unit 130 communicates with each user device 300 through the data channel allocated to the corresponding user device 300. [ In the following, such a series of detailed procedures are omitted in order not to obscure the gist of the present invention.

7 is a flowchart illustrating a method for managing inter-cell interference of a pico base station according to an embodiment of the present invention.

Referring to FIG. 7, the control module 230 allocates transmission resources for a plurality of user equipments 300 in step S710. In this case, when the pico base station 200 is located in the central area of the macro cell, the control module 230 uses all the frequency domains, and transmits transmission resources not used by the macro base station 100, May be assigned to the serving user equipment (300). When the pico base station 200 is located in one sector in an edge region of a macro cell divided into a plurality of sectors, the control module 230 controls the macro base station 100 ) Allocates transmission resources using the remaining subbands except for the frequency subbands used.

Next, the control module 230 communicates with the corresponding user device 300 through the transmission resource allocated through the communication module 210 in step S720. At this time, the control module 230 may control the communication module 210 to reduce the transmission power or turn off the transmission power in the case of unallocated transmission resources.

In order to evaluate the performance of the present invention as described above, it is necessary to obtain SINR (Signal to Interference plus Noise Ratio) of user equipments to show improvement of QoS of users. According to the embodiment of the present invention, the reception SINR of the macrocell user equipment m is given by Equation 1 below.

Figure pat00001

here

Figure pat00002
Wow
Figure pat00003
Is the transmission power of the serving macrocell M and neighboring macrocell M 'on subcarrier k, respectively.
Figure pat00004
Wow
Figure pat00005
Is the channel gain between the macrocell user equipment m and the serving macrocell M, the macrocell user equipment m and the neighboring macrocell M ', respectively, on subcarrier k. Similarly,
Figure pat00006
Is the transmission power of the neighboring picocell P on the subcarrier k,
Figure pat00007
Is the channel gain between the macrocell user equipment m and the neighboring picocell P in subcarrier k.
Figure pat00008
Is the white noise power spectral density.

In the case of a picocell user, the macrocell and surrounding picocell are interfered. Similar to the macro cell user, the received SINR of the picocell user p is:

Figure pat00009

here

Figure pat00010
Wow
Figure pat00011
Is the transmission power of the serving picocell P and the neighboring picocell P 'on the subcarrier k.
Figure pat00012
Wow
Figure pat00013
Is the channel gain between the picocell user device p and the serving picocell P, and the picocell user device p and neighboring picocell P ', respectively, on subcarrier k. Similarly,
Figure pat00014
Is the transmit power of the neighboring macrocell M on subcarrier k,
Figure pat00015
Is the channel gain between the picocell user p and the neighboring macrocell M in sub-carrier k.
Figure pat00016
Is the white noise power spectral density.

Table 2 below shows a simulation parameter in a heterogeneous network based on 3GPP LTE-Advanced 10 MHz bandwidth. It is a heterogeneous network system based on system level Monte Carlo simulation.

Parameter Value Macro Cell Pico Cell Number of Cells 7 3 / Macro Cell Coverage Radius 1km
(ISD = 1,732m) Radius 250m Channel Bandwidth 10MHz BS Transmit Power 46dBm 30dBm Size of Center Zone 0.63 of macro cell coverage White Noise Power Density -174 dBm / Hz Path Loss L = 128.1 + 37.6logR
(R in km) L = 140.7 + 37.6logR
(R in km)

In order to evaluate the performance improvement of the inter-cell interference management method according to the embodiment of the present invention, the following techniques are compared and analyzed. Hereinafter, performance against the interference technique indicated by "No ICIC", "SFR" and "SFR + ABS" will be compared. No ICIC (inter-cell interference coordination) is a technique for randomly allocating resources to both macrocells and picocell users. In addition, SFR is a technique of allocating resources using only SFRs in the frequency domain among the invented techniques, and SFR + ABS is a technique of allocating resources using both SFRs and ABSs in frequency and time domains, respectively to be.

8 is a graph showing a received SINR cumulative distribution function (CDF) of a macrocell user.

Referring to FIG. 8, when only the SFR is applied in the inventive technique, a pico-cell user device (a user device registered in a pico-cell) installed in a macro-cell edge region as well as a co- The cross-tier interference between the macrocell and the picocell user equipment is reduced by using the subcarrier that is not used by the macrocell user equipment (user equipment registered in the macrocell) located in that area. Therefore, it can be seen that the interference of the cell edge is remarkably reduced and the SINR performance is improved. Since the picocell transmits at low power, the influence of the interference received by the macrocell is small. However, in the case of applying not only the SFR but also the ABS in the center area of the macro cell, the user installed in the center area of the macro cell uses ABS in the time area which is not used by the macro cell user device located in the area, Lt; / RTI >

On the other hand, in the case of No ICIC, subcarriers are randomly allocated to both the macro cell user equipment and the picocell user equipment. Co-tier interference occurs when user equipment at different cell edges use the same subcarrier, and between the user devices that are very close to each other, regardless of the subcarrier used by the macrocell user equipment Cross-tier interference occurs when a cell user equipment is used. Therefore, the effect of cross-tier interference as well as co-tier interference is much greater than that of the proposed technique, which does not improve SINR performance.

9 is a graph showing the received SINR CDF of the picocell user equipment. Referring to FIG. 9, it can be seen that the performance is improved in the order of No ICIC, SFR, and SFR + ABS in the same manner as the SINR performance of the macrocell user equipment. However, unlike the macro cell user equipment, it can be seen that the SFR + ABS has a large SINR improvement. This is because not only the performance at the cell edge when applying SFR but also the cross-tier interference caused by the macro cell through ABS is reduced.

10 is a graph showing the received SINR CDF of a total user equipment combining a macrocell user device and a picocell user device. As shown in FIG. 10, it can be seen that the interference management method according to the embodiment of the present invention improves the reception SINR performance of all users compared to other schemes.

11, 12, and 13 are graphs for explaining performance according to the interference management technique. 11 and 12 are graphs showing the spectral efficiency CDFs of the macro cell user and the picocell user, respectively. And FIG. 13 is a graph showing the spectral efficiency CDF of the entire user. As shown, No ICIC, SFR, and SFR + ABS show improved spectral efficiency performance.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate description of the present invention and to facilitate understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: macro base station 110:
120: storage unit 130:
200: Pico base station 210: Communication module
220: storage module 230: control module
300: User device

Claims (8)

A control unit that uses all frequency regions for communication with a user device located in a central region of a macro cell and allocates transmission resources so as not to use a part of transmission resources in a time domain; And
And a communication unit for communicating with the user equipment according to the allocated transmission resource.
Macro base station for interference management through resource allocation in heterogeneous networks. The method according to claim 1,
The control unit
An edge region is divided into a plurality of sectors for communication with a user apparatus located in an edge region of a macro cell and a frequency subband allocated in advance to each sector is allocated as a transmission resource
Macro base station for interference management through resource allocation in heterogeneous networks. A control module for allocating transmission resources that are not used by the macro base station among all transmission resources in the time domain using all the frequency domains when the macro cells are located in the central region of the macro cell; And
And a communication module for communicating with the user equipment according to the allocated transmission resource
A pico base station for interference management through resource allocation in heterogeneous networks. The method of claim 3,
The control module
When a sector is located in one sector in an edge region of a macro cell divided into a plurality of sectors, a transmission resource is allocated to the one sector using the remaining subbands excluding the frequency subbands used by the macro base station To
A pico base station for interference management through resource allocation in heterogeneous networks. Allocating transmission resources so as to communicate with a user device located in a central region of a macro cell using all frequency regions but not using some of transmission resources in a time domain; And
And communicating with the user equipment according to the allocated transmission resource
A method for interference management through resource allocation in a heterogeneous network of macro base stations. 6. The method of claim 5,
The step of allocating the transmission resource
An edge region is divided into a plurality of sectors for communication with a user apparatus located in an edge region of a macro cell and a frequency subband allocated in advance to each sector is allocated as a transmission resource
A method for interference management through resource allocation in a heterogeneous network in a macro base station. Allocating transmission resources not used by a macro base station among all transmission resources in a time domain using all frequency domains when the macro cell is located in a central region of a macro cell; And
And communicating with the user equipment according to the allocated transmission resource
A method for interference management through resource allocation in a heterogeneous network of pico base stations. 8. The method of claim 7,
The step of allocating the transmission resource
When a sector is located in one sector in an edge region of a macro cell divided into a plurality of sectors, a transmission resource is allocated to the one sector using the remaining subbands excluding the frequency subbands used by the macro base station To
A method for interference management through resource allocation in a heterogeneous network of pico base stations.
KR20130081339A 2013-07-11 2013-07-11 Method and Apparatus of Interference Management Scheme based on Resource Allocation in Heterogeneous Network KR20150007442A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104780543A (en) * 2015-01-30 2015-07-15 南京邮电大学 Spectrum resource optimization method of distributed base station architecture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104780543A (en) * 2015-01-30 2015-07-15 南京邮电大学 Spectrum resource optimization method of distributed base station architecture

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