KR20140011271A - Method and apparatus for allocating resource in cellular communication system - Google Patents

Abstract

A resource allocating apparatus in a cellular communication system including a plurality of cells divides a time resource of one cycle into a plurality of time division sections, allocates one time division section among the time division sections to a user terminal in a cell boundary region, and controls at least one among the size of one cycle and the sizes of the time division sections according to the distributions of a load and a user terminal in a plurality of cells. [Reference numerals] (10) Over-loaded state; (20) Low-loaded state; (S910,S930) Resource status request message; (S920,S940) Resource status response message (the amount of resources that are not used); (S950) Resource request message; (S960) Resource response message

Description

Method and apparatus for allocating resources in cellular communication system {METHOD AND APPARATUS FOR ALLOCATING RESOURCE IN CELLULAR COMMUNICATION SYSTEM}

The present invention relates to a method and apparatus for allocating resources in a cellular communication system, and more particularly, to a method and apparatus for allocating resources for intercell interference cancellation in a cellular communication system.

In general, in order to maximize system capacity by efficiently using radio resources, the entire service area is divided into a plurality of cells and configured as multiple cells, and each cell is provided with a base station for providing a service to a terminal located in the cell. In such a cellular communication system, in order to increase system capacity, frequency use efficiency must be maximized. To this end, each cell is designed to use the entire frequency band in common. Thus, when adjacent cells use the same frequency band, there is no interference because subchannels having orthogonal frequencies are allocated for each user in one cell, but interference occurs between cells. This is called inter-cell interference.

In particular, the UE located in the center region of the cell is not a problem because inter-cell interference is not a problem because the strength of the signal received from another cell is weak and the signal received from the serving cell is strong, but the UE located in the boundary region of the cell is received from an adjacent cell. Due to the strong signal strength, intercell interference significantly degrades communication performance.

In order to solve this problem, a Fractional Frequency Reuse (FFR) technique has been proposed to reduce inter-cell interference in a multi-cell environment. The FFR technique divides a cell into a center region and an edge region, and sets frequency reuse rates of terminals located in the center region and terminals located in the boundary region differently. However, the FFR technique limits the frequency band used by the center and border users, which limits the frequency domain multi-user gain. For example, if a cell edge user experiences deep fading in the assigned frequency band, it will suffer severe performance degradation.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a method and apparatus for allocating resources in a cellular communication system capable of improving resource utilization efficiency while removing intercell interference.

According to an embodiment of the present invention, a method for allocating resources by a resource allocating apparatus of a first cell in a cellular communication system including a plurality of cells is provided. The resource allocation method includes dividing a time resource of one period into a plurality of time division sections, allocating one time division section among the plurality of time division sections for a user terminal in a cell boundary region, and the plurality of time divisions. Allocating the remaining time division sections except for the one time division section among the sections for the user terminal in the cell center region, and the size and the plurality of the periods according to the distribution and load distribution of the user terminals of the plurality of cells. And adjusting at least one of sizes of time division intervals of the plurality of times.

The remaining time division sections except for the one time division section among the plurality of time division sections may be allocated for the user terminal in the cell boundary region of the neighboring cell of the first cell.

The allocating for the user terminal in the cell boundary region may include setting a transmit power to a first level in the one time division interval, and allocating for the user terminal in the cell center region may include the transmit power. It may include setting a to a second level lower than the first level.

The adjusting may include analyzing the distribution of the user terminal of the first cell, analyzing the load distribution of the user terminal of the first cell, and the distribution and load distribution of the user terminal of the first cell. The method may include determining the size of the one time division period so as not to overlap with the remaining time division period.

The determining may include determining the one time division interval in proportion to the distribution and load distribution of the user terminal of the first cell.

The adjusting may further include determining the size of the one time division interval through negotiation with the neighboring cell when it is impossible to determine that the one time division interval does not overlap with the remaining time division interval. Can be.

The determining of the size of the one time division interval through negotiation with the neighbor cell may include receiving a resource status update message including an amount of time resources remaining from the neighbor cell having a low load state among the neighbor cells; and The method may include requesting and allocating a required time resource to a neighboring cell in a low load state.

The determining of the size of the one time division interval through negotiation with the neighbor cell may include: transmitting a resource status request message to the neighbor cell; receiving a resource status response message including an amount of time resources remaining from the neighbor cell; The method may include selecting a neighbor cell having a low load state by referring to the amount of time resources remaining in the resource status response message, and requesting and assigning time resources to the selected neighbor cell.

The analyzing of the distribution of the user terminal may include classifying the user terminal into a user terminal located in a cell boundary region and a user terminal located in a cell center region based on the received signal strength of the user terminal.

The classifying may include receiving the received signal strength of the user terminal of the first cell from the user terminal.

The classifying may include measuring received signal strength of a user terminal of the first cell.

According to another embodiment of the present invention, an apparatus for allocating a resource of a first cell in a cellular communication system including a plurality of cells is provided. The resource allocation apparatus includes a control unit and a transmitter. The control unit divides a time resource of one period into a plurality of time division sections, allocates one time division section of the plurality of time division sections for a user terminal in a cell boundary region, and At least one of the size of the one period and the size of the plurality of time division intervals is adjusted according to the distribution and the load distribution. The transmitter transmits information of the first time division interval to an adjacent cell.

The controller allocates the remaining time division intervals of the plurality of time division intervals except for the one time division interval for the user terminal of the cell center region, and the remaining time division intervals are each a cell of an adjacent cell of the first cell. It may be allocated for the user terminal in the border area.

The controller may set the transmission power to a first level in the one time division period, and set the transmission power to a second level lower than the first level in the remaining time division period.

The controller may determine the size of the one time division section so as not to overlap the remaining time division section according to the distribution and load distribution of the user terminal of the first cell.

The controller may determine the size of the one time division period by negotiating the one time division period with the adjacent cell.

The resource allocation apparatus may further include a receiver. The receiving unit receives a message related to resource allocation from the neighbor cell. In this case, when the control unit receives a message including the amount of time resources remaining from the neighboring cells in the low-load state among the neighboring cells, the controller increases the time division interval by using the remaining time resources of the neighboring cells in the low-load state. You can.

The controller analyzes the distribution of the user terminal of the first cell and the load distribution of the user terminal of the first cell, and determines the one time division interval in proportion to the distribution and the load distribution of the user terminal of the first cell. The transmitter may transmit the load distribution of the user terminal of the first cell to the neighbor cell.

The resource allocation apparatus may further include a receiver. The receiver receives a load distribution of a user terminal of a neighbor cell from the neighbor cell. At this time, the control unit determines the size of the one cycle according to the load distribution of the user terminal of the plurality of cells, the size of the one cycle can be changed within the limit that satisfies the delay performance required in the user service quality.

According to an embodiment of the present invention, the frequency domain multi-user gain can be obtained by using the entire frequency band in one cell at a specific time point by dividing and allocating resources in the time domain, as compared with the conventional method of dividing and allocating resources in the frequency domain. There is an effect to improve.

In addition, it is possible to increase resource utilization efficiency by adaptively allocating resources to an imbalance of load distribution, and adaptively performs resource allocation between cells in consideration of changes in user distribution and load levels, thereby eliminating intercell interference and improving resource utilization efficiency. It can increase.

In addition, a separate centralized server may not be needed because a cell determines resources to be used by a cell only by exchanging information with neighboring cells.

1 is a diagram illustrating an example of a cellular communication system according to an embodiment of the present invention.
2 is a diagram illustrating a radio resource structure according to an embodiment of the present invention.
3 is a diagram schematically illustrating a resource allocation method according to an embodiment of the present invention.
4 is a diagram illustrating a resource allocation method over time according to an embodiment of the present invention.
5 and 6 are diagrams schematically illustrating a resource allocation method according to another embodiment of the present invention, respectively.
7 is a flowchart illustrating a resource allocation method according to an embodiment of the present invention.
8 is a diagram illustrating an example of a method of exchanging information with a neighbor cell according to an embodiment of the present invention.
9 is a diagram illustrating another example of a method of exchanging information with a neighbor cell according to an embodiment of the present invention.
10 illustrates a resource allocation apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

A resource allocation method and apparatus in a cellular communication system according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an example of a cellular communication system according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a radio resource structure according to an embodiment of the present invention.

Referring to FIG. 1, a cellular communication system includes a plurality of cells C1, C2, and C3. Cells C1, C2, C3 each include base stations 10, 20, 30. The base stations 10, 20, and 30 communicate with terminals in cells C1, C2, and C3, respectively, using radio resources.

2, a radio resource can be defined as a two-dimensional region of time and frequency.

The base stations 10, 20, and 30 divide the time domain and allocate resources to the cells C1, C2, and C3 to eliminate intercell interference. As described above, a method of removing inter-cell interference by dividing a time domain and allocating resources is called a FTR (Fractional Time Reuse) method.

3 is a view schematically showing a resource allocation method according to an embodiment of the present invention, Figure 4 is a view showing a resource allocation method according to an embodiment of the present invention over time.

Referring to FIG. 3, when cells C1, C2, and C3 of a cellular communication system are divided into three cell types, time resources of one time resource division period Tp are divided into three time division intervals TB1 and TB2. , TB3). Each time division section TB1, TB2, TB3 includes a plurality of time slots, respectively.

Each of the time division sections TB1, TB2, and TB3 are mutually exclusively allocated to service the user terminal located in the boundary area Rout of the cells C1, C2, C3, respectively. The time division section not used in the boundary area Rout of each cell C1, C2, C3 is commonly used in the center area Rin of each cell C1, C2, C3.

As shown in FIG. 4, in the time division section TB1, resources for the user terminal located in the boundary area Rout of the cell C1 are allocated and located in the center area Rin of the cells C2 and C3. Resources for the user terminal are allocated. In the time division period TB2, resources for the user terminal located in the boundary area Rout of the cell C2 are allocated, and resources for the user terminal located in the center area Rin of the cells C1 and C3 are allocated. . In the time division section TB3, resources for the user terminal located in the boundary area Rout of the cell C3 are allocated, and resources for the user terminal located in the center area Rin of the cells C1 and C2 are allocated. do.

In this case, since the time division section allocated to the center region Rin of the cells C1, C2 and C3 and the time division section allocated to the border region Rout of the adjacent cell of each cell C1, C2 and C3 overlap, In order to prevent interference between the cells, the cells allocated the time division sections TB1, TB2, and TB3 allocated to the boundary region Rout in each time division section TB1, TB2, and TB3 transmit high power P1. Allow other cells to allow the transmission of low power (P2). For example, in the time division period TB1, the cell C1 performs transmission of high power P1, and the cells C2 and C3 perform transmission of low power P2.

When the time domain is partitioned in this manner, the user equipment can be serviced using the entire frequency band during each time division period TB1, TB2, TB3 allocated to each cell. A frequency selective gain may be provided to a user terminal located at (Rout).

5 and 6 are diagrams illustrating a resource allocation method according to another embodiment of the present invention, respectively.

Referring to FIGS. 5 and 6, the ratio of time division intervals TB1, TB2, TB3 allocated to the boundary region of each cell within one time division period Tp is a degree of unbalance of user distribution or load of each cell. It can be increased or decreased accordingly. In addition, the time division period Tp may also be increased or decreased depending on the user distribution of each cell or the degree of imbalance of load.

As shown in FIG. 5, when there are many cell boundary user terminals of the cell C1 in the nth time division period nTp, the time division interval TB1 is increased and the time division intervals TB2 and TB3 are decreased. Can be. If the cell boundary user terminal of the cell C1 decreases and the cell boundary user terminal of the cell C3 increases in the (n + 1) th time division period [(n + 1) Tp], the time division interval TB1 is generated. It is reduced and the time division interval TB3 can be increased.

In addition, as shown in FIG. 6, the cell boundary user terminals of the cells C2 and C3 are small in the nth time division period nTp, but in the (n + 1) th time division period [(n + 1) Tp]. When the cell boundary user terminals of the cells C2 and C3 increase and the distribution of the cell boundary user terminals increases as a whole, the time division period Tp may be increased to accommodate them. The size of the time division period Tp may not be increased indefinitely and may be increased to the extent that the delay requirement required by the user quality of service (QoS) may be satisfied.

7 is a flowchart illustrating a resource allocation method according to an embodiment of the present invention. In FIG. 7, for convenience of description, the base station 10 of the cell C1 is described, and the base stations 20 and 30 of the cells C2 and C3 may also operate in the same or similar manner as the base station 10.

Referring to FIG. 7, the base station 10 initializes resource allocation information of the cell C1 (S700). The resource allocation information may include a time division period Tp and time division intervals TB1, TB2, TB3. At this time, since there is no information on the distribution of the measured user terminal or the load distribution, the base station 10 allocates a predetermined time division period Tp and each time division period TB1, TB2, TB3 to the cell C1. . For example, the base station 10 may allocate the time division interval TB1 for the user terminal in the cell boundary region, and allocate the time division intervals TB2 and TB3 for the user terminal in the cell center region.

If the cellular communication system supports OAM (Operations, Administration and Maintenance) to provide information on the load distribution of each cell at the present time, the base station 10 divides the time division period based on the load distribution of the cell C1. (Tp) and time division sections TB1, TB2 and TB3 can be set.

The base station 10 classifies a user terminal in the cell C1 into a terminal located in a cell center area (hereinafter referred to as a "cell center user") and a terminal located in a cell boundary area (hereinafter referred to as a "cell border user"). By (S710), the distribution of the user terminal is analyzed.

The base station 10 may be classified into a cell center user and a cell boundary user by measuring the received signal strength of the user terminal. The base station 10 may be classified as a cell center user when the received signal strength of the user terminal is greater than or equal to a threshold value and classified as a cell boundary user when the received signal strength of the user terminal is less than or equal to the threshold. In addition, the base station 10 may report the received signal strength from the user terminal. The user terminal measures the received signal strength and reports it to the base station 10. For the detailed classification of the base station 10, the user terminal measures the received signal strength of the neighbor cell through a cell search procedure, You can also report to the base station. In addition, the user terminal may be classified as a cell-centric user or a cell boundary user by directly comparing the received signal strength with a threshold value. In this case, the user terminal may be changed from the cell boundary user to the cell-centric user or the cell boundary at the cell center user. The change information may be reported to the base station 10 only when the user is changed.

Next, the base station 10 obtains load information of the user terminal in the cell C1 (S720). The base station 10 may obtain downlink load information by measuring a queue length of the base station 10, and may obtain uplink load information through a report from a user terminal.

After the base station 10 obtains the classification of each user terminal as a cell-centric user or a cell boundary user and load distribution information of each user terminal, the load distribution in the cell is determined through the classification of the user terminal and the load distribution information of each user terminal. Analyze (S730).

The base station 10 determines the time division interval TB1 for the cell boundary user according to the load distribution in the cell, that is, the load distribution levels of the cell center region and the cell boundary region (S740). As described with reference to FIG. 5, the base station 10 may increase or decrease the time division interval TB1 according to the load distribution level of the cell boundary region.

On the other hand, when the base station 10 is unable to allocate the time division interval TB1 so as not to overlap with the time division intervals TB2 and TB3 allocated for the cell boundary users of the adjacent cells (S750), the neighbor cell C2, Negotiation with C3) may allocate the necessary time division interval TB1. When negotiation with the neighbor cells C2 and C3 is required, the base station 10 exchanges resource state information or load distribution information with the base stations 20 and 30 of the neighbor cells C2 and C3 (S760). ), Resource state information and load distribution information of each cell c1, c2, c3 are shared. That is, the base station 10 may determine the required time division interval TB1 using resource state information or load distribution information of each cell C1, C2, C3 (S770).

In this way, when the time division section TB1 is determined, the base station 10 reports the information of the time division section TB1 to the base stations 20 and 30 of the adjacent cells C2 and C3 and reports the resource allocation procedure. It ends (S780). In addition, the base station 10 may report resource state information and load distribution information of the cell C1 to the base stations 20 and 30.

As such, the resource allocation procedure may be largely divided into an intra-cell load adaptation step S740 for intra-cell load balancing and an inter-cell load adaptation step S770 for inter-cell load balancing. . If the resources required for accommodating cell edge users (that is, the time division interval (TB1)) are allocated in the resource allocation phase for intra-cell load balancing, the resource allocation procedure is completed, and the resources required for the resource allocation phase for intra-cell load balancing If the allocation is not made, resource allocation for load balancing between cells is performed.

Resource status information of each base station 10, 20, 30 should be shared between the base stations 10, 20, 30 for resource allocation for load balancing within or between cells. In addition, resource allocation information changed as a result of resource allocation must also be shared between the base stations 10, 20, and 30. This information sharing procedure is performed through an interface between base stations. In the LTE system, an information sharing procedure is performed through an X2 interface defined between base stations.

The inter-base station procedure for performing the resource allocation procedure proposed in the present invention can be considered in two ways.

Although not shown in the drawing, there is an interface between adjacent base stations (cells), so that information transmission between the base stations is supported. This interface may correspond to the X2 interface in LTE.

8 is a diagram illustrating an example of a method of exchanging information with a neighbor cell according to an embodiment of the present invention.

Each base station 10, 20, 30 may report to the neighbor cell whenever the resource allocation information changes. In particular, as shown in FIG. 8, the base stations 10 and 20 have a low load distribution in the cell boundary area, so that resources allocated for the cell boundary user are not used, that is, under load, and the base station 30 is Assuming that the load distribution in the cell boundary region is so high that there is not enough resources allocated for the cell boundary user and thus additional resources should be allocated, i.e., an overload state, the base station 10 in the low load state will update the resource state. The message is transmitted to the neighbor base stations 20 and 30 (S810 and S820). At this time, the resource status update message includes the amount of unused resources. Similarly, the base station 20 in the low load state also transmits a resource state update message to the neighbor base stations 10 and 20 (S830 and S840).

Then, the base station 30 in the overloaded state transmits a resource request message to one of the base stations 10 of the base stations 10 and 20 in the low load state (S850) to request the necessary resources.

When the base station 10 receives the resource request message from the base station 30, by transmitting a resource response message to the base station 30 (S860), the base station 30 approves the resources required.

In operation S870 and S880, the base station 10 in the low load state in which the change in resource allocation has occurred transmits a resource state update message to the neighboring base stations 20 and 30.

As such, when the base stations 10 and 20 in the low load state among the base stations 10, 20 and 30 perform a procedure of transmitting a message including the amount of unused resources to the neighboring base station, the base station 30 in the overloaded state ) Can know the base station to request a resource at that time and can request and allocate resources to the base station.

Meanwhile, the base station 30 in an overloaded state may request and receive resource state information from a neighboring base station, find a base station 10 and 20 in a low load state, and request and allocate a resource.

9 is a diagram illustrating another example of a method of exchanging information with a neighbor cell according to an embodiment of the present invention.

As shown in FIG. 9, when the base station 10 is overloaded and the base station 20 is in a low load state, the base station 10 transmits a resource status request message to the adjacent base stations 20 and 30 (S910 and S930). ).

When the neighboring base stations 20 and 30 receive the resource status request message from the base station 10, the neighboring base stations 20 and 30 transmit the resource status response message to the base station 10 (S920 and S940). The resource status response message contains the amount of unused resources.

The base station 10 selects a base station to request a resource from the base station 20 in a low load state by referring to the amount of resources not used in the resource status response message received from the neighbor base stations 10 and 20.

The base station 10 transmits a resource request message to the base station 20 (S950) to request the necessary resources.

When the base station 20 receives the resource request message from the base station 10, the base station 10 transmits the resource response message to the base station 10 (S960) to approve the resources required by the base station 10.

The procedure of exchanging information with a neighboring cell as shown in FIG. 9 has a disadvantage in that the overhead is large because there are many necessary messages, but there is an advantage that the base station requiring resource allocation can receive the resource allocation immediately. On the other hand, the procedure of exchanging information with neighboring cells as shown in FIG. 8 has the advantage of low overhead because there are few messages required, but there may be a delay because the base station must first find the base station to receive the necessary resources.

10 illustrates a resource allocation apparatus according to an embodiment of the present invention.

Referring to FIG. 10, the base stations 10, 20, and 30 each include a resource allocation device 100. The following description will be made based on the base station 10.

The resource allocation apparatus 100 includes a transmitter 110, a receiver 120, and a controller 130.

The transmitter 110 transmits information related to resource allocation to the neighboring base station, and the receiver 120 receives information related to resource allocation of the neighboring base station from the neighboring base station. Information related to resource allocation may include time division period information, time division interval information, load distribution information, and the like as described above.

The controller 130 performs resource allocation for load balancing within a cell and resource allocation for load balancing between cells described with reference to FIGS. 2 to 9. The controller 1360 divides a time resource of one period Tp into a plurality of time division sections TB1, TB2, and TB3, allocates a time division section TB1 for a user terminal in a cell boundary region, and allocates a time division section. (TB2, TB3) is allocated for the user terminal in the cell center area. In this case, the time division section TB2 is allocated for the user terminal in the cell boundary region of the neighbor cell 20, and the time division section TB3 is allocated for the user terminal in the cell boundary region of the neighbor cell 30.

Next, the controller 130 adjusts the time division section TB1 according to the distribution and load distribution of the user terminal in the cell C1. The controller 130 adjusts the time division section TB1 according to the distribution and load distribution of the user terminal in the cells 10, 20, and 30. Specifically, the controller 130 classifies the user terminal in the cell and analyzes the load distribution of the user terminal in the cell. The controller 1360 may determine a time division interval for the cell boundary user according to the load distribution in the cell, and in some cases, determine the time division interval through negotiation with an adjacent cell.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, Such an embodiment can be readily implemented by those skilled in the art from the description of the embodiments described above.

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 (19)

In a cellular communication system including a plurality of cells, a method of allocating resources by a resource allocation apparatus of a first cell,
Dividing a time resource of one cycle into a plurality of time division sections;
Allocating one time division section of the plurality of time division sections for a user terminal in a cell boundary region;
Allocating the remaining time division sections except for the one time division section among the plurality of time division sections for the user terminal in the cell center region; and
Adjusting at least one of the size of the one period and the size of the plurality of time division intervals according to the distribution and load distribution of the user terminals of the plurality of cells;
/ RTI > In claim 1,
The remaining time division intervals except for the one time division interval among the plurality of time division intervals are respectively allocated for the user terminal in the cell boundary region of the adjacent cell of the first cell. 3. The method of claim 2,
The allocating for the user terminal in the cell boundary region includes setting a transmission power to a first level in the one time division interval.
The allocating for the user terminal in the cell center area includes setting the transmit power to a second level lower than the first level. 3. The method of claim 2,
The adjusting step
Analyzing a distribution of a user terminal of the first cell;
Analyzing the load distribution of the user terminal of the first cell, and
And determining the size of the one time division interval so as not to overlap with the remaining time division interval according to the distribution and load distribution of the user terminal of the first cell. 5. The method of claim 4,
The determining may include determining the one time division interval in proportion to the distribution and load distribution of the user terminal of the first cell. 5. The method of claim 4,
The adjusting may further include determining the size of the one time division interval through negotiation with the adjacent cell when it is impossible to determine that the one time division interval does not overlap with the remaining time division interval. Resource allocation method. The method of claim 6,
Determining the size of the one time division interval through negotiation with the neighboring cell
Receiving a resource status update message including an amount of time resources remaining from a neighboring cell in a low load state among the neighboring cells, and
Requesting and allocating necessary time resources to the neighboring cell in the low load state. The method of claim 6,
Determining the size of the one time division interval through negotiation with the neighboring cell
Transmitting a resource status request message to a neighbor cell;
Receiving a resource status response message including an amount of time resources remaining from the neighbor cell;
Selecting a neighboring cell in a low load state by referring to the amount of time resources remaining in the resource status response message; and
A resource allocation method comprising requesting and allocating a time resource to a selected neighbor cell. 5. The method of claim 4,
The analyzing of the distribution of the user terminal may include classifying the user terminal into a user terminal located in a cell boundary region and a user terminal located in a cell center region based on the received signal strength of the user terminal. The method of claim 9,
The classifying step includes receiving the received signal strength of the user terminal of the first cell from the user terminal. The method of claim 9,
The classifying step includes the step of measuring the received signal strength of the user terminal of the first cell. An apparatus for allocating resources of a first cell in a cellular communication system including a plurality of cells,
A time resource of one period is divided into a plurality of time division sections, one time division section of the plurality of time division sections is allocated for a user terminal in a cell boundary region, and the distribution and load of the user terminals of the plurality of cells A controller for controlling at least one of the size of the one period and the size of the plurality of time division intervals according to a distribution; and
Transmitter for transmitting the information of the first time division interval to an adjacent cell
And a resource allocation unit. The method of claim 12,
The controller allocates the remaining time division sections except for the one time division section among the plurality of time division sections for the user terminal in the cell center region.
Each of the remaining time division intervals is allocated to a user terminal in a cell boundary region of an adjacent cell of the first cell. The method of claim 13,
And the control unit sets the transmit power to a first level in the one time division period, and sets the transmit power to a second level lower than the first level in the remaining time division periods. The method of claim 13,
And the controller determines the size of the one time division period so as not to overlap with the remaining time division period according to the distribution and load distribution of the user terminal of the first cell. The method of claim 13,
And the control unit determines the size of the one time division period by negotiating the one time division period with the adjacent cell. 17. The method of claim 16,
Receiving unit for receiving a message related to resource allocation from the neighbor cell
Further comprising:
When the control unit receives a message including the amount of time resources remaining from the neighboring cells in the low-load state among the neighboring cells, the controller increases the time division interval by using the remaining time resources of the neighboring cells in the low-load state. Resource Allocation Device. The method of claim 13,
The controller analyzes the distribution of the user terminal of the first cell and the load distribution of the user terminal of the first cell, and determines the one time division interval in proportion to the distribution and the load distribution of the user terminal of the first cell. ,
The transmitter is a resource allocation device for transmitting the load distribution of the user terminal of the first cell to the adjacent cell. The method of claim 18,
Receiving unit for receiving the load distribution of the user terminal of the neighbor cell from the neighbor cell
More,
The control unit determines the size of the one cycle according to the load distribution of the user terminal of the plurality of cells,
And the size of the one cycle is changed within a limit that satisfies the delay performance required for user quality of service.

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