KR101311514B1 - Wireless communicatoin system and method for scheduling wireless resource in the same - Google Patents

Wireless communicatoin system and method for scheduling wireless resource in the same Download PDF

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Publication number
KR101311514B1
KR101311514B1 KR1020120063356A KR20120063356A KR101311514B1 KR 101311514 B1 KR101311514 B1 KR 101311514B1 KR 1020120063356 A KR1020120063356 A KR 1020120063356A KR 20120063356 A KR20120063356 A KR 20120063356A KR 101311514 B1 KR101311514 B1 KR 101311514B1
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South Korea
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terminal
signal processing
processing apparatus
resources
digital signal
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KR1020120063356A
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Korean (ko)
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이기호
이용규
지영하
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주식회사 케이티
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Priority to PCT/KR2012/009195 priority patent/WO2013187560A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • 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
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: Wireless communication system and wireless resource scheduling method in the system are provided to prevent the inaccuracy of channel quality indication (CQI) reported by terminals performing exclusive allocation of resources due to interference by an adjacent cell. CONSTITUTION: A digital unit (DU) (200) is connected to a core system. The DU processes a wireless digital signal. Each of plurality of radio units (RUs) (110,120,130) are physically separated from the DU. The each of the plurality of RUs converts and amplifies a digital signal received from the DU. The each of the plurality of RUs receives a signal transmitted from the terminal. The each of the plurality of RUs delivers the received signal to the DU. [Reference numerals] (300) Core system; (AA) Network

Description

Wireless communication system and wireless resource scheduling method in the system {WIRELESS COMMUNICATOIN SYSTEM AND METHOD FOR SCHEDULING WIRELESS RESOURCE IN THE SAME}

The present invention relates to a wireless communication system and a radio resource scheduling method in the system.

In general, radio resources in a wireless communication system can be classified into frequency resources and time resources, and optimal allocation of such resources is very important for improving the performance of a wireless communication system.

FIG. 1 is a diagram illustrating an example of resource allocation in an orthogonal frequency division multiplexing (OFDM) system. In detail, FIG. 1 illustrates allocation of a frequency resource and a time resource in a grid form to a user.

In such a wireless communication system, there is a need for a method of maximizing overall network performance by minimizing cell-to-cell interference and increasing resource reuse rate through common resource management between cells.

To this end, as shown in FIG. 2, a reuse method of reusing the same resource is used in an area inside a cell, and an exclusive coordination method of resources using different resources between cells in a cell boundary area. This is used.

However, when coordinated scheduling of resources is performed in the cell boundary region, mutual interference can be reduced by preventing time resources from overlapping with terminals located in the cell boundary region, but the UE reports according to the allocation state of time resources. There is a problem in that data transmission efficiency is not good because channel information is incorrect.

SUMMARY OF THE INVENTION The present invention provides a wireless communication system and a method for scheduling radio resources in a system in which CQIs reported by terminals performing exclusive allocation of resources are prevented from being inaccurate due to interference by neighboring cells.

A scheduling method of a radio resource according to an aspect of the present invention,

A scheduling method in a digital signal processing apparatus that is commonly included in a plurality of cells, and commonly manages a wireless signal processing apparatus that provides wireless communication for a terminal in a cell, wherein the digital signal processing apparatus is configured to be configured as a terminal via the wireless signal processing apparatus. Receiving a signal received from; And allocating frequency resources to terminals located within a boundary area of adjacent cells determined based on the signal received from the terminal, but not allocating the frequency resources.

The allocating of the frequency resource may include determining whether to exclusively allocate resources to the terminals based on a signal received from the terminal; And if it is determined that exclusive allocation of resources is to be performed, allocating frequency resources to the terminals such that they do not overlap each other.

In addition, the step of determining whether the exclusive allocation of resources should be performed, the method comprising: determining whether the terminal is located in the boundary region of the adjacent cells through a signal received from the terminal; And if it is determined that the terminal is located in a cell boundary region, determining that the terminal should perform exclusive allocation of resources to the terminal.

In addition, in the step of allocating the frequency resources, the frequency resources are allocated based on a plurality of subbands constituting the frequency resources, and at least one subband is allocated to the terminal, but at least two subbands are allocated. In this case, it is characterized by allocating consecutive subbands on the frequency axis.

In addition, after the step of allocating the frequency resources, the digital signal processing apparatus for transmitting the allocation information of the frequency resources to the wireless signal processing device; And performing, by the wireless signal processing apparatus, data transmission with the terminal by using the frequency resource according to the allocation information.

According to another aspect of the present invention, a scheduling method of a radio resource is provided.

A digital signal processing device connected to the core system for processing a wireless digital signal; And physically separated from the digital signal processing apparatus, converts and amplifies a digital signal received from the digital signal processing apparatus, and transmits the digital signal to the terminal. A plurality of radio signal processing apparatuses, wherein the digital signal processing apparatus controls to perform exclusive allocation of resources to terminals located in a boundary region of adjacent cells, and the digital signal processing apparatus performs exclusive allocation of resources. Characterizing the frequency resources so as not to overlap each other for the terminals to be performed.

In this case, the digital signal processing device is characterized in that the control to perform the exclusive allocation of resources by receiving a signal received from the terminal through the wireless signal processing device.

In addition, the digital signal processing apparatus determines whether the terminal is located in the boundary region of adjacent cells through the signal received from the terminal, and based on the determination whether the exclusive allocation of resources to the terminal is performed. It is characterized by judging.

In addition, the digital signal processing apparatus allocates frequency resources based on a plurality of subbands constituting frequency resources to a terminal that should perform exclusive allocation of resources, and allocates at least one subband to the terminal. However, when assigning two or more subbands, it is characterized by allocating consecutive subbands on the frequency axis.

The digital signal processing apparatus may further include a receiver configured to receive an uplink signal strength value from a terminal through the wireless signal processing apparatus; A determination unit determining whether each terminal is located in a cell boundary region based on the signal strength value of each terminal received by the reception unit; A setting unit configured to perform exclusive allocation of resources to terminals located in a cell boundary region determined by the determination unit and to perform frequency resource allocation so that frequency resources do not overlap each other with respect to the terminals; And a control unit for transmitting frequency resource allocation information to the radio signal processing apparatus that provides a service for a terminal in which exclusive allocation of resources is performed by the setting unit.

According to the present invention, CQIs reported by UEs performing exclusive allocation of resources are prevented from being inaccurate due to interference by neighboring cells.

This enables optimal MCS level allocation to the terminal.

Thus, data transmission efficiency in a wireless communication system is improved.

1 illustrates an example of resource allocation in an orthogonal frequency division multiplexing (OFDM) system.
2 is a diagram illustrating a concept of allocating resources through a cooperative scheme in general.
FIG. 3 illustrates a comparison of resource allocation when using a general scheduling scheme and an exclusive allocation scheme of resources in a wireless communication system.
4 is a diagram illustrating an example of allocating time resources in an exclusive allocation scheme to terminals located at a cell boundary in a wireless communication system.
FIG. 5 is a diagram illustrating a concept of resource allocation for terminals located in an inner region of a cell in a wireless communication system.
FIG. 6 is a diagram illustrating an example of channel state information measured for terminals illustrated in FIG. 4.
7 is a schematic structural diagram of a network according to an embodiment of the present invention.
8 is a diagram illustrating a concept of allocating frequency resources in a wireless communication system according to an embodiment of the present invention.
FIG. 9 is a diagram illustrating an example of subband configuration of frequency resources when the frequency band is 10 MHz in a wireless communication system.
10 illustrates a concept of allocating frequency resources (subbands) in a wireless communication system according to an embodiment of the present invention.
11 is a diagram illustrating another example of allocating frequency resources (subbands) in a wireless communication system according to an embodiment of the present invention.
12 is a block diagram of a digital signal processing apparatus according to an embodiment of the present invention.
13 is a flowchart of a radio resource scheduling method according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment , An access terminal (UE), an access terminal (AT), and the like, and may include all or some functions of a terminal, a mobile terminal, a subscriber station, a mobile subscriber station, a user equipment,

In this specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B, an evolved NodeB (eNodeB) A base station (BTS), a mobile multihop relay (MMR) -BS, or the like, and may perform all or a part of functions of an access point, a radio access station, a Node B, an eNodeB, a base transceiver station, .

FIG. 3 illustrates a comparison of resource allocation when using a general scheduling scheme and an exclusive allocation scheme of resources in a wireless communication system.

Referring to FIG. 3, when the general scheduling method is used, since the UEs can use all resources in the boundary period between the cell A and the cell B, it can be seen that interference occurs at the cell boundary and thus the transmission speed is decreased.

However, in case of using the Coordinated Scheduling (CS) method, the channel state is good because the interference is not generated by allocating resources so that the channels used by the UEs do not overlap each other in the boundary section between Cell A and Cell B. It can be seen that the transmission speed is also increased.

An example of allocating time resources in an exclusive allocation scheme for terminals located at a cell boundary is shown in FIG. 4.

Referring to FIG. 4, the terminal A 410 is exclusively allocated such that time resources used by the terminal A 410 and the terminal B 420 in the cell boundary region 13 between the two cells 10 and 20 are different from each other. ) And the terminal B 420 does not generate mutual interference, thereby improving the channel state of the terminals, thereby improving transmission speed.

On the other hand, for the terminal C (430) and the terminal D (440) located in each cell inner region (11, 21) of the two cells (10, 20), not the cell boundary, as shown in FIG. Frequency reuse can be increased by allocating resources for reuse.

On the other hand, the channel quality information (CQI) reported after the terminal receives a signal transmitted from the base station as shown in Table 1 below, the target block error rate (Target BLock Error Rate, BLER) is a constant value, for example For example, the terminal reports a level 0 to 15 that the terminal can receive while maintaining it at 10%.

Figure 112012047099354-pat00001

Meanwhile, referring to FIG. 4, when terminal A 410 reports CQI to cell 1 10, data is transmitted from neighbor cell 2 20 to terminal B 420 at resource time A. FIG. Since the terminal A 410 reports to the cell 1 (10) has a high value.

However, since cell 2 (20) transmits data to terminal B (420) at resource time B, this signal interferes with a reference signal transmitted from cell 1 (10) to terminal A (410). Therefore, the CQI reported by the terminal A 410 to the cell 1 10 has a low value.

As such, when an exclusive allocation scheme of time resources is performed for the terminals 410 and 420 located in the boundary region 13 of the cells 10 and 20, the CQIs reported by the terminals 410 and 420 are attached to FIG. 6. The fluctuations are severe as shown in FIG.

However, when the CQI reported from the terminals 410 and 420 is large while the exclusive allocation of time resources is performed, the base stations 110 and 120 have difficulty in allocating an appropriate MCS. That is, the base stations 110 and 120 allocate a Modulation & Coding Scheme (MCS) level using the CQIs reported by the terminals 410 and 420. However, since the CQI information is inaccurate and the channel information is inaccurate as a result, the base station 110, 120 has an appropriate MCS level. It becomes difficult to assign.

Accordingly, there is a need for a method for the UEs 410 and 420 to report stable CQI information.

Hereinafter, a method and apparatus for radio resource scheduling according to an embodiment of the present invention for solving the above problem will be described.

7 is a schematic structural diagram of a network according to an embodiment of the present invention.

Referring to FIG. 7, a network according to an exemplary embodiment of the present invention includes a radio unit (RU) 100, a digital unit DU 200, and a core system 300. do. The wireless signal processing apparatus 100 and the digital signal processing apparatus 200 constitute a signal processing system of wireless communication.

The wireless signal processing apparatus 100 converts and amplifies a digital signal received from the digital signal processing apparatus 200 into a radio frequency (RF) signal according to a frequency band as a part of processing a wireless signal. A plurality of wireless signal processing apparatuses 100, 110, 120 and 130 are connected to the digital signal processing apparatus 200, and each wireless signal processing apparatus 100 is installed in a service area, that is, a cell. The wireless signal processing apparatus 100 and the digital signal processing apparatus 200 may be connected by an optical cable.

The digital signal processing apparatus 200 performs a process of encrypting and decrypting a wireless digital signal, and is connected to the core system 300. Unlike the wireless signal processing apparatus 100, the digital signal processing apparatus 200 is not installed in a service area but is mainly installed in a central office of a communication company, and is a virtualized base station. The digital signal processing apparatus 200 transmits and receives signals to and from a plurality of radio signal processing apparatuses 100.

The existing communication base station includes a processing unit corresponding to each of the wireless signal processing apparatus 100 and the digital signal processing apparatus 200 in one physical system, and one physical system is installed in the service target area. On the other hand, the system according to the present invention physically separates the wireless signal processing device 100 and the digital signal processing device 200, and only the wireless signal processing device 100 is installed in the service area.

The core system 300 processes connection between the digital signal processing apparatus 200 and the external network, and includes an exchange (not shown) and the like.

In the embodiment of the present invention, referring to FIG. 8, the digital signal processing apparatus 200 is an uplink received by two wireless signal processing apparatuses 110 and 120 located in each of adjacent cells 10 and 20, respectively. Receives the measured value of the signal strength. Thereafter, the digital signal processing apparatus 200 evaluates uplink quality of the terminals 450 and 460 based on the signal strength values received from the two wireless signal processing apparatuses 110 and 120, and according to the evaluation result. It is determined whether the cell boundary area 13 of the terminals 450 and 460 is located.

Referring to FIG. 8, since the terminals 450 and 460 are located in the cell boundary region 13, the digital signal processing apparatus 200 performs the wireless signal processing apparatus to perform exclusive allocation of resources to the terminals 450 and 460. Control 110 and 120. In particular, in the embodiment of the present invention, the radio signal processing apparatus 110 of the cell 1 10 transmits data to the terminal 450 using the frequency resource A, and the radio signal processing apparatus 120 of the cell 2 20. ) Controls to transmit data to the terminal 460 using the wave number resource B. That is, in the embodiment of the present invention, when the resource is exclusively allocated, the frequency resource is exclusively allocated, so that each of the terminals 450 and 460 allocates the frequency resource to use different frequencies.

Referring to FIG. 8, when the terminal 1 450 allocates a frequency resource A and the terminal 2 460 allocates a frequency resource B to each of the terminals 450 and 460, different cell frequencies are allocated to each cell. Since the adjacent cell, that is, the cell 2 (20) does not interfere with the frequency resource A used to transmit data from the 1 (10) to the terminal 1 (450), a stable and accurate CQI for the frequency resource A is assigned to the frequency resource A. Is calculated and can be reported from the terminal 1 450 to the wireless signal processing apparatus 110.

Similarly, when the terminal 2 460 transmits data using the frequency resource B in the cell 2 20, since the cell 1 10 has no interference with the corresponding frequency resource B, the CQI, which is channel information for the frequency resource B, is transmitted. Stable calculation can be reported to the wireless signal processing device 110.

Accordingly, according to the stable CQI information reporting, each of the wireless signal processing apparatuses 110 and 120 may allocate an appropriate MCS to each of the terminals 450 and 460.

Meanwhile, in the LTE (Logn Term Evolutio) system, a usable subband size is determined according to the system bandwidth as shown in Table 2 below.

Figure 112012047099354-pat00002

For example, when a bandwidth of 10 MHz is used, the number of resource blocks (N DL RBs ) is 50, and each of the 50 is divided into six units to create a subband. That is, eight subbands consisting of six resources (RBs) and one subband consisting of the remaining two RBs are composed of a total of nine subbands.

Therefore, when the bandwidth is 10MHz, as shown in the accompanying FIG. 9, resource allocation for exclusive allocation is performed for terminals in neighboring cells for each subband.

10 illustrates a concept of allocating frequency resources (subbands) in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 10, since the terminals 450 and 460 are located in the cell boundary region 13, the digital signal processing apparatus 200 performs the wireless signal processing apparatus to perform exclusive allocation of resources to the terminals 450 and 460. Control 110 and 120. That is, the radio signal processing apparatus 110 of the cell 1 10 transmits data to the terminal 450 using the frequency resource A, and the radio signal processing apparatus 120 of the cell 2 20 uses the wave number resource B. Control to transmit data to the terminal 460 using.

At this time, in the embodiment of the present invention, the frequency resources A and B for using the exclusive allocation of resources are configured by using some continuous set of nine subbands. That is, the resources allocated to the terminals 450 and 460 in the area for exclusively allocating resources are continuously allocated on the frequency side while matching the boundaries of nine subbands.

Referring to FIG. 10, the frequency resource A allocated to the terminal 1 450 by the radio signal processing apparatus 110 includes five subbands (26 RBs) arranged in succession on top of nine subbands. Frequency resource B allocated to the terminal 2 460 by the radio signal processing apparatus 120 is 4 subbands (consisting of 24 RBs) arranged in succession below the 9 subbands. Assign it to consist of Here, the number of subbands constituting the frequency resources A and B is not important, and the subbands constituting the frequency resources are continuously arranged on the frequency.

As such, by allocating frequency resources to the terminals 450 and 460 based on the subbands, subband CQI information reported by the terminals 450 and 460 may be accurately measured without interference from neighbor cells in an area in which exclusive allocation of resources is performed. Therefore, when the wireless signal processing apparatus (110, 120) transmits data to the terminal (450, 460), it is possible to transmit data using the correct MCS level by using each subband CQI, thereby data transmission efficiency Will be higher.

11 is a diagram illustrating another example of allocating frequency resources (subbands) in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 11, three cells, that is, cell 1 (10), cell 2 (20), and cell 3 (30) are adjacent to each other, and also three terminals, that is, terminal 3 (470) and terminal 4 (480). And when the terminal 5 490 is located at the boundary region 14 of the three cells to perform exclusive allocation of resources to the three terminals 470, 480, and 490, the digital signal processing apparatus 200 may use the terminal. The wireless signal processing apparatus 110, 120, 130 is controlled to perform exclusive allocation of resources to 470, 480, and 490.

Accordingly, as a result of performing exclusive allocation of resources, frequency resource A is allocated to terminal 3 470, frequency resource B is allocated to terminal 4 480, and frequency resource C is allocated to terminal 5 490. At this time, the allocated frequency resources A, B, and C are subbands each of which is continuously arranged, and their usage boundaries must match the boundaries of the regions of the subbands in which they are arranged. In the present embodiment, four subbands (consisting of 20 RBs) arranged consecutively at the top of the nine subbands for frequency resource A are allocated, and the most out of nine subbands for frequency resource C. Allocating three subbands (consisting of 18 RBs) arranged consecutively in the lower part, and for the frequency resource B, the remaining subbands except for the subbands allocated to the frequency resources A and B among the nine subbands, That is, it allocates two subbands (consisting of 12 RBs) arranged continuously in the center.

Next, a digital signal processing apparatus 200 according to an embodiment of the present invention will be described in detail with reference to FIG. 12. Here, as shown in FIG. 10, the two cells 10 and 20 overlap each other and are adjacent to each other, and the two terminals 450 and 460 are located at the boundary of the cells 10 and 20 so that the resources are exclusive. It is assumed that the assignment is performed.

12 is a block diagram of a digital signal processing apparatus 200 according to an embodiment of the present invention.

Referring to FIG. 12, the digital signal processing apparatus 200 includes a receiver 210, a determiner 220, a CS setup unit 230, and a resource allocator 240.

The receiver 210 receives an uplink signal strength value determined by signals received from the terminals 450 and 460 from the wireless signal processing apparatuses 110 and 120.

The determination unit 220 determines whether the terminal is located inside the cell or the boundary region between the cells based on the signal strength value for each terminal received by the receiver 210.

The CS setting unit 230 determines the terminals 450 and 460 located in the boundary region between the cells according to the determination of the determination unit 220, and sets the exclusive allocation of resources to the identified terminals. The radio resources are allocated to the terminals 450 and 460 so as not to overlap each other. Here, frequency resources are allocated so that they do not overlap each other. In this case, the CS setting unit 230 allocates at least one subband to each of the terminals 450 and 460. When allocating two or more subbands, the CS setters 230 must be subbands that are consecutive on the frequency axis. do. Therefore, the boundary of the frequency resources allocated to each of the terminals 450 and 460 will be the boundary of the allocated subbands.

The control unit 240 provides the CS setting to the wireless signal processing apparatuses 110 and 120 that provide the service for the terminals 450 and 460 in which the CS setting unit 230 is configured to perform exclusive allocation of resources. Requests to perform scheduling by transmitting frequency resource information allocated to 450 and 460. That is, referring to FIG. 10, the apparatus 110 for processing a radio signal is composed of five subbands (26 RBs) consecutively positioned on the frequency axis with respect to the terminal 1 450 in order to perform exclusive allocation of resources. Scheduling is performed to transmit data, and the wireless signal processing apparatus 120 is located in the lower portion on the frequency axis with respect to the terminal 2 460 in order to perform exclusive allocation of resources. Scheduling is used to transmit data using 24 RBs).

Hereinafter, a scheduling method of a radio resource according to an embodiment of the present invention will be described with reference to FIG. 13.

13 is a flowchart of a radio resource scheduling method according to an embodiment of the present invention.

This will also be described with reference to FIG. 10. That is, it is assumed that the terminals 450 and 460 are located in the cell boundary area 13 to perform exclusive allocation of resources (CS).

First, the wireless signal processing apparatuses 110 and 120 transmit reference signals to the terminals 450 and 460, respectively, in order to know the channel state of the terminals 450 and 460 (S100).

Accordingly, the terminals 450 and 460 receive the reference signals transmitted from the wireless signal processing apparatuses 110 and 120, respectively, and generate CQIs, which are channel state information, to the wireless signal processing apparatuses 110 and 120. Report each (S110). Each of the wireless signal processing apparatuses 110 and 120 transmits the corresponding CQI to the digital signal processing apparatus 200, respectively.

Upon receiving the CQI reported from the terminals 450 and 460, the digital signal processing apparatus 200 performs an exclusive allocation of resources to each terminal 450 and 460 based on the received signal strength value of each terminal. Determine (S120).

If it is determined that the exclusive allocation of resources is to be performed, the digital signal processing apparatus 200 allocates frequency resources to the terminals 450 and 460, but allocates the allocated frequency bands so that they do not overlap each other. The allocation is performed based on the band (S130). In particular, in the embodiment of the present invention, the digital signal processing apparatus 200 allocates at least one subband to each of the terminals 450 and 460, and when the two or more subbands are allocated, the allocated subbands are located on the frequency axis. Allow consecutive subbands in

Thereafter, the digital signal processing apparatus 200 transmits frequency resource allocation information for the terminals 450 and 460 to the respective wireless signal processing apparatuses 110 and 120 (S140), and the wireless signal processing apparatuses 110 and 120. In step S150, data transmission is performed for the terminals 450 and 460 using the allocated frequency resources according to the frequency resource allocation information transmitted from the digital signal processing apparatus 200.

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, It belongs to the scope of right.

Claims (10)

A scheduling method in a digital signal processing apparatus that is commonly included in a plurality of cells, and commonly manages a wireless signal processing apparatus that provides wireless communication for a terminal in a cell.
Receiving, by the digital signal processing apparatus, a signal received from a terminal through the wireless signal processing apparatus; And
When performing exclusive allocation of resources to terminals located within a boundary area of neighboring cells determined based on a signal received from the terminal, each of the terminals so that frequency resources allocated to each of the terminals do not overlap each other. Allocating frequency resources for
Scheduling method comprising a. The method of claim 1,
Allocating the frequency resource,
Determining whether to exclusively allocate resources to the terminals based on a signal received from the terminal; And
If it is determined that the exclusive allocation of resources should be performed, allocating frequency resources to the terminals so that they do not overlap each other.
Scheduling method comprising a. The method of claim 2,
Determining whether or not the exclusive allocation of the resource should be performed,
Determining whether the terminal is located in a boundary region of the adjacent cells based on a signal received from the terminal; And
If it is determined that the terminal is located in a cell boundary region, determining that the terminal should perform exclusive allocation of resources to the terminal.
Scheduling method comprising a. 4. The method according to any one of claims 1 to 3,
In the step of allocating the frequency resource,
Allocating frequency resources based on a plurality of subbands constituting the frequency resource, allocating at least one subband to a terminal, and assigning consecutive subbands on a frequency axis when two or more subbands are allocated. doing
Scheduling method, characterized in that. 5. The method of claim 4,
After allocating the frequency resource,
Transmitting, by the digital signal processing apparatus, the allocation information of the frequency resource to the wireless signal processing apparatus; And
The wireless signal processing apparatus performing data transmission with the terminal using a frequency resource according to the allocation information;
The scheduling method further comprising. A digital signal processing device connected to the core system for processing a wireless digital signal; And
Physically separated from the digital signal processing apparatus, the digital signal received from the digital signal processing apparatus converts and amplifies and transmits the signal to the terminal, and receives the signal transmitted from the terminal and transmits the signal to the digital signal processing apparatus. A wireless signal processing device,
The digital signal processing apparatus controls to perform exclusive allocation of resources to terminals located within a boundary area of adjacent cells determined based on a signal received from a terminal,
The digital signal processing apparatus allocates frequency resources to each of the terminals so that frequency resources do not overlap each other for terminals that should perform exclusive allocation of resources.
And the wireless communication system. The method according to claim 6,
The digital signal processing apparatus receives a signal received from a terminal through the wireless signal processing apparatus and controls to perform exclusive allocation of resources. The method of claim 7, wherein
The digital signal processing apparatus determines whether the terminal is located in a boundary region of adjacent cells through a signal received from the terminal, and determines whether to exclusively allocate resources to the terminal based on the determination. Wireless communication system, characterized in that. The method according to claim 6,
The digital signal processing apparatus allocates a frequency resource based on a plurality of subbands constituting a frequency resource to a terminal that should perform exclusive allocation of resources, and allocates at least one subband to the terminal. When assigning more than one subband, assigning consecutive subbands on the frequency axis
And the wireless communication system. 10. The method according to any one of claims 6 to 9,
The digital signal processing apparatus comprising:
A receiver configured to receive an uplink signal strength value from a terminal through the wireless signal processing apparatus;
A determination unit determining whether each terminal is located in a cell boundary region based on the signal strength value of each terminal received by the reception unit;
A setting unit configured to perform exclusive allocation of resources to terminals located in a cell boundary region determined by the determination unit and to perform frequency resource allocation so that frequency resources do not overlap each other with respect to the terminals; And
Control unit for transmitting the frequency resource allocation information to the radio signal processing apparatus for providing a service for the terminal set to be exclusive allocation of resources by the setting unit
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