KR20080073028A - Apparatus and method for allcating resource to relay station in realy wireless communication system - Google Patents

Abstract

A device for allocating resources to relay stations in a relay-type wireless communication system and a method therefore are provided to determine resource reuse patterns by using interference information measured in each relay station, thereby enabling efficient resource operation even when the relay stations are irregularly disposed. N relay stations measure mutual interference by exchanging beacon signals with other relay stations within a cell, and feed back the measured interference information to base stations. The base stations allocate resources for the N relay stations, so that the N relay stations reuse the resources by using the interference information fed back from each of the N relay stations. When at least one of the relay stations transmits the beacon signals by using uplink sounding channels, the rest of the relay stations receive the beacon signals.

Description

Apparatus and method for allocating resources to a relay station in a relay-type wireless communication system {APPARATUS AND METHOD FOR ALLCATING RESOURCE TO RELAY STATION IN REALY WIRELESS COMMUNICATION SYSTEM}

1 is a schematic diagram of a general relay wireless communication system;

2 is a diagram illustrating a schematic procedure for determining a resource reuse pattern in a relay type wireless communication system according to the present invention;

3 is a block diagram of a relay station in a relay wireless communication system according to the present invention;

4 is a block diagram of a base station in a relay wireless communication system according to the present invention;

5 is a diagram illustrating an interference measurement procedure of a relay station in a wireless communication system of a relay method according to an embodiment of the present invention;

6 is a diagram illustrating a resource allocation procedure of a base station in a relay wireless communication system according to an embodiment of the present invention; and

7 is a diagram illustrating a coloring technique in a relay-type wireless communication system according to an embodiment of the present invention.

The present invention relates to a relay wireless communication system, and more particularly, to an apparatus and method for allocating resources to a relay station in a relay wireless communication system.

In 4th Generation (hereinafter referred to as '4G') communication system, active research to provide users with various Quality of Service (QoS) service using transmission speed of about 100Mbps Is going on. Particularly, in 4G communication systems, studies are being actively conducted to support high-speed services in a form of guaranteeing mobility and QoS in a broadband wireless access (BWA) communication system such as a wireless local area network system and a wireless urban area network system. Is going on. In addition, the representative communication system is the Institute of Electrical and Electronics Engineers (IEEE) 802.16 communication system.

The IEEE 802.16 communication system uses orthogonal frequency division multiplexing (OFDM) / orthogonal frequency division to support a broadband transmission network on a physical channel of the wireless communication system. A communication system employing an Orthogonal Frequency Division Multiple Access (hereinafter referred to as 'OFDMA') scheme. In the IEEE 802.16 communication system, research is being actively conducted to secure mobility of a terminal and flexibility of a wireless network configuration, and to provide a more efficient service in a wireless environment in which traffic distribution or call demand is changed. As one of the methods, a communication system using a multi-hop relay type data transfer method using a relay station has been considered. By using the relay station in the broadband wireless communication system, an effect of increasing coverage of a base station and improving throughput is generated. That is, the transmission rate can be improved by placing the relay station in a specific area having a poor channel environment. In addition, the relay station can be located near the cell boundary so that the terminal and the base station can communicate with each other.

When performing multi-hop transmission using the RS, as many radio resources as the number of hops are required for the same data. Moreover, a lot of control information has to be exchanged for resource allocation to the relay station, and capacity deterioration occurs in an in-band system such as the OFDMA system. Therefore, when the gain due to the quality improvement of the received signal through the RS or the reduction in the received power is greater than the additional resource loss, the system performance may be improved due to the multi-hop scheme. For this reason, a technique for reusing resources between spatially separated relay stations in order to compensate for the additional resource loss has been studied.

According to the conventional inter-resource resource reuse scheme, the resource usage pattern is determined at the system design level according to the arrangement of the base station and the relay stations. For example, when relay stations are regularly arranged as shown in FIG. 1, the base station allocates resources to reuse resources between specific relay stations according to a fixed pattern. For example, when the relay stations are arranged as shown in FIG. 1, the base station 110 includes the relay station A 120-1, the relay station C 120-3, the relay station B 120-2, and the relay station D 120-4. ) To allocate the same resource for each pair. That is, when the positions of the relay stations are fixed regularly, the resource reuse pattern may be determined using the positional relationship between the relay stations.

However, the above-described resource reuse pattern determination method is difficult to apply when the mobile relay station is used. In addition, even if a fixed relay station is used, if a new relay station is installed or a used relay station is removed, the resource reuse pattern must be determined again at the system design level. Therefore, in order to efficiently utilize resources in an environment in which the relay stations are irregularly arranged and the relay stations are movable, a flexible resource reuse pattern determination method should be proposed.

Accordingly, an object of the present invention is to provide an apparatus and method for determining a resource reuse pattern in a situation where a relay station is irregularly arranged in a relay wireless communication system.

Another object of the present invention is to provide an apparatus and method for determining a resource recycling pattern using control information in a relay type wireless communication system.

Another object of the present invention is to provide an apparatus and method for determining a resource recycling pattern by using interference information with other relay stations measured by a relay station in a wireless communication system of a relay method.

According to a first aspect of the present invention for achieving the above object, a wireless communication system of the relay method, by measuring the interference between each other by exchanging beacon signal with other relay stations in the cell, and transmits the interference information to the base station N relay stations which feed back and a base station which allocates resources to the N relay stations to reuse resources by using the interference information fed back from each of the N relay stations.

According to a second aspect of the present invention for achieving the above object, a relay station apparatus in a wireless communication system of a relay method, comprising: a communication unit for transmitting a beacon signal for interference measurement and receiving beacon signals from other relay stations; And a measuring unit for measuring the received signal strength from the other relay stations using the beacon signal, and a discriminating unit for determining the interfering relay station according to a feedback format with reference to the received signal strength.

According to a third aspect of the present invention for achieving the above object, in a relay wireless communication system, a base station apparatus includes a communication unit for receiving interference information from each relay station and the relay stations using interference information collected from each relay station. A storage unit storing the mutual interference information table, and a scheduler for grouping at least one relay station that can use the same resource without interference by referring to the interference information, and scheduling the resource to be reused by the at least one relay station belonging to the same group. It is characterized by including the.

According to a fourth aspect of the present invention for achieving the above object, an interference measuring method of a relay station in a wireless communication system of the relay method, the step of receiving a beacon signal from other relay stations, and using the other beacon signal And measuring the received signal strength from the relay stations, and constructing and feeding back the interference information with reference to the received signal strength.

According to a fifth aspect of the present invention for achieving the above object, the resource allocation method of the base station in the wireless communication system of the relay method, receiving the interference information from each relay station, and using the interference information collected from each relay station Constructing a table of mutual interference information between relay stations, grouping at least one relay station that can use the same resource without interference by referring to the interfering interference information, and reusing resources by the at least one relay station belonging to the same group Characterized in that it comprises a process of scheduling.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, a description will be given of a technique for determining a resource reuse pattern in a situation where a relay station is irregularly arranged in a relay wireless communication system. The present invention describes an orthogonal frequency division multiplexing (hereinafter referred to as "OFDM") wireless communication system as an example, and may be equally applicable to other wireless communication systems.

First, the resource reuse pattern determination method proposed by the present invention will be briefly described.

In order for the base station to allocate resources for reuse between the relay stations, interference information between the relay stations should be obtained. Therefore, as shown in FIG. 2A, each RS broadcasts a beacon signal for interference measurement. Here, the beacon signal may be transmitted using a specific resource region and an uplink sounding channel under control of the base station. Next, as shown in (b) of FIG. 2, each RS receives a beacon signal from other RSs and measures the degree of interference. If the beacon signal is exchanged through the uplink sounding channel, each of the relay stations in the cell sequentially transmits the beacon signal once through the sounding channel, and the rest is performed several times while not transmitting itself. Receive beacon signals from relay stations. Here, the beacon signal may be a preamble signal rather than a separate signal. When the preamble signal is used as the beacon signal, the other relay stations except for one relay station simultaneously transmit the preamble signal, and the one relay station simultaneously receives the preamble signals of the other relay stations except itself.

When each relay station completes the measurement of the interference degree from other relay stations as shown in FIG. 2 (b), each relay station feeds back interference information to the base station as shown in FIG. For example, the feedback information fed back may be received signal strength information for all other relay stations or may be a predetermined number of ID station identifier (ID) information with severe interference. Accordingly, the base station can allocate relay stations with low interference to reuse resources by using the interference information received from the relay stations.

Here, a method of controlling the operation of each relay station for the interference measurement is as follows.

First, the base station directly controls each time. The base station transmits and receives the beacon signal using a control channel, that is, the beacon signal transmission order and the resource area for the beacon signal to the relay station by performing the control for the interference measurement.

The second method is to use a preset pattern for each relay station. Each relay station sets some beacon signal transmission / reception patterns in advance, and measures interference according to a pattern corresponding to an initial value notified from the base station during initial access.

2 is a block diagram of a relay station in a relay type wireless communication system according to the present invention.

As shown in FIG. 2, the relay station includes a wireless communication unit 301, a signal strength measuring unit 323, a message checking unit 325, a data buffer 327, a message generating unit 329, and an interference repeater determining unit. 331 is configured.

The wireless communication unit 301 performs signal processing for transmitting and receiving data through a wireless channel, an RF (Radio Frequency) receiver 303, an analog to digital converter (hereinafter referred to as an ADC) 305, OFDM demodulator 307, subcarrier demapper 309, demodulator and decoder 311, encoding and modulator 313, resource mapper 315, OFDM modulator 317, digital to analog converter And hereinafter referred to as DAC) 319 and the RF transmitter 321.

The RF receiver 303 converts an RF signal received through an antenna into a baseband analog signal. The ADC 305 converts an analog signal provided from the RF receiver 303 into a digital signal and outputs the digital signal. The OFDM demodulator 307 outputs a frequency domain signal by performing Fast Fourier Transform (FFT) on the time domain signal provided from the ADC 305. The subcarrier demapper 309 reconstructs a signal mapped to each subcarrier provided from the OFDM demodulator 307 to a form before being mapped. In this case, the subcarrier demapping machine 309 extracts a beacon signal received from another relay station and provides it to the signal strength measuring unit 323. If the beacon signal is exchanged through an uplink sounding channel, the subcarrier demapper 309 extracts a beacon signal from one relay station during one time interval. In addition, when the beacon signal is a preamble signal, the subcarrier demapper 309 extracts preamble signals from the remaining relay stations except for the self relay station during one time interval. The demodulator and decoder 311 demodulates and decodes the signal provided from the resource demapper 309 in a corresponding manner to output an information bit string. In this case, user data of the information bit string is output to the data buffer 327, and control information is output to the message checking unit 325.

The encoder and modulator 313 encodes and modulates the information bit stream in a corresponding manner to output a complex symbol signal. The subcarrier mapper 315 maps a signal provided from the encoder and modulator 313 to a corresponding subcarrier according to a scheduling result. In particular, according to the present invention, the subcarrier mapper 315 maps a beacon signal to other relay stations to the corresponding subcarrier. If the beacon signal is exchanged through the uplink sounding channel, the subcarrier mapper 315 maps the beacon signal to be transmitted when receiving the beacon signal once from the remaining relay stations in the cell. In addition, when the beacon signal is the preamble signal, the subcarrier mapper 315 maps the preamble signal by the same number of times as the number of other relay stations when receiving the preamble signals from other relay stations simultaneously.

The OFDM modulator 317 converts the signals provided from the subcarrier mapper 315 into OFDM symbols by performing an inverse fast fourier transform (IFFT). The DAC 319 converts the digital signal from the OFDM modulator 317 into an analog signal and outputs the analog signal. The RF transmitter 321 converts the baseband signal from the DAC 319 into an RF band signal and transmits it through an antenna.

The signal strength measuring unit 323 receives a beacon signal received from other relay stations from the subcarrier demapper 309 and measures received signal strength, that is, interference strength, from the other relay stations. The message checking unit 325 checks the control message received from the base station. For example, the message checking unit 325 identifies a resource region to be used for data relay, a resource region to transmit the beacon signal, and a resource region to receive beacon signals of other relay stations through a MAP message. The data buffer 327 temporarily stores data to be relayed between the base station and the terminal. The message generator 329 generates a message for feeding back interference information from other relay stations to the base station.

The interference repeater determining unit 331 determines the repeater that interferes with the received signal strength information from other repeaters provided from the signal strength measuring unit 323. In this case, the interference repeater determination unit 331 has different criteria for determining the interference repeater according to a format of a message for feeding back the interference information. For example, when feeding back a predetermined number of repeater identifier information, the interference repeater determining unit 331 selects a predetermined number of repeaters with severe interference and informs the message generating unit 329. Alternatively, in case of feeding back the relay identifier information having the interference of a certain level or more, the interference repeater determining unit 331 selects a repeater having a reception signal strength higher than a threshold value and informs the message generating unit 329. If the feedback signal strength information from all the other repeaters is fed back without selecting the interference repeater, the interference repeater determination unit 331 receives all the received signal strength information provided from the signal strength measurement unit 323. Provided to the message generator 329.

3 is a block diagram of a base station in a relay wireless communication system according to the present invention.

As shown in FIG. 3, the base station includes a wireless communication unit 401, a message checking unit 423, a message generating unit 425, an interference information storage unit 427, and a scheduler 429.

The wireless communication unit 401 performs signal processing for transmitting and receiving data through a wireless channel, an RF receiver 403, an ADC 405, an OFDM demodulator 407, a subcarrier demapper 409, demodulation and decoding. Group 411, an encoding and modulator 413, a resource mapper 415, an OFDM modulator 417, a DAC 419, and an RF transmitter 421.

The RF receiver 403 converts an RF signal received through an antenna into a baseband analog signal. The ADC 405 converts an analog signal provided from the RF receiver 403 into a digital signal and outputs the digital signal. The OFDM demodulator 407 outputs a frequency domain signal by performing fast Fourier transform on the time domain signal provided from the ADC 405. The subcarrier demapper 409 reconstructs a signal mapped to each subcarrier provided from the OFDM demodulator 407 to a form before being mapped. The demodulator and decoder 411 demodulates and decodes a signal provided from the resource demapper 409 in a corresponding manner to output an information bit string.

The encoder and modulator 413 encodes and modulates the information bit stream in a corresponding manner to output a complex symbol signal. The subcarrier mapper 415 maps a signal provided from the encoder and modulator 413 to a corresponding subcarrier according to a scheduling result. The OFDM modulator 417 converts the signals provided from the subcarrier mapper 415 into OFDM symbols by inverse fast Fourier transform. The DAC 419 converts the digital signal from the OFDM modulator 417 into an analog signal and outputs the analog signal. The RF transmitter 421 converts the baseband signal from the DAC 419 into an RF band signal and transmits it through an antenna.

The message checking unit 423 checks the received control message. In particular, according to the present invention, the message checking unit 423 checks the interference information feedback messages received from the repeaters. The message generator 425 generates a control message. For example, the message generator 425 generates a map message for notifying a resource scheduling result.

The interference information storage unit 427 collects the interference information of each relay station provided from the message checking unit 423 to construct and store the interference information table between the relay stations. For example, the interference information between the relay stations may be stored in a form as shown in Table 1 below.

 Relay station A  Relay station B  Relay station C  Relay station D  Relay station E  Relay station A  -  ×  Relay station B  ×  -  ×  Relay station C  ×  -  ×  Relay station D  ×  -  Relay station E  -

Table 1 shows the interference information table stored in the interference information storage unit 427 when the relay station identifier information having a predetermined number of interferences is fed back from the relay stations. In the table shown in Table 1, '×' refers to a pair of relay stations that cannot share resources with each other due to severe interference. If received signal strength information of all other relay stations is fed back from the relay stations, the received signal strength values are recorded in the table. However, even if the received signal strength information is fed back, for scheduling purposes, it is preferable that the table is arranged in a form indicating whether resources can be shared as shown in Table 1 below.

The scheduler 429 schedules resources for use by relay stations and terminals in the cell. In particular, according to the present invention, the scheduler 429 schedules a resource to be reused with reference to interference information between relay stations stored in the interference information storage unit 427. In other words, the scheduler 429 pairs relay stations without interference with each other using the interference information table as shown in Table 1, and allocates the same resource to the paired relay station pairs so that the resources are reused.

Here, when there are three or more relay stations allocated with the same resource, there should be no interference between all possible pairs of relay stations. For example, as shown in Table 1, a pair of each of the relay station A and the relay station C, and the relay station A and the relay station D may be allocated the same resource. However, in the case of the group consisting of the relay station A, the relay station C, and the relay station D, the same resource cannot be allocated due to the interference between the relay station C and the relay station D. On the other hand, in the case of the group consisting of the relay station A, the relay station C, and the relay station E, the relay station A and the relay station C, the relay station A and the relay station E, and the relay station C and the relay station E all have no interference. Resources may be allocated.

An example of a technique for grouping all pairs in the group without interference may be a coloring technique. The coloring technique will be described with reference to FIG. 7. FIG. 7 illustrates a process of allocating resources by applying a coloring scheme to a table configured as shown in Table 1.

The rules of the coloring technique are as follows.

First, blocks located in the same row and column are displayed in the same color. Second, blocks marked with '×' cannot be colored. Third, coloring is preferentially performed on blocks that can be colored in the same color as the color already used. Fourth, when the number of groups using the same resource is large, coloring is preferentially performed on groups including a small number of relay stations.

Referring to FIG. 7, first, a block for one pair of relay stations capable of sharing resources is selected as shown in FIG. 7A. When relay station A and relay station C share resources as shown in FIG. 7A, relay station A cannot share resources with relay station D that interferes with relay station C. FIG. Accordingly, '×' is displayed in the block with the relay station D in the relay station A row as shown in FIG.

Subsequently, the remaining blocks in the relay station A row are selected as shown in FIG. As a result, since relay station A, relay station C, and relay station E share resources, '×' is added to a block in the relay station E column among blocks for relay stations that do not share resources with three relay stations as shown in FIG. Is displayed.

Thereafter, as shown in (e) of FIG. 7, the remaining blocks are selected among the blocks of the relay station E column. Here, the block selected in the relay station E column is already displayed in the same color as the block selected in the relay station E column. Finally, as shown in (f) of FIG. 7, the empty block is selected in the relay station B row, thereby completing grouping. In this case, the block selected in the relay station B row is displayed in a different color to indicate that a resource different from the block selected in the relay station A row is used.

As shown in FIG. 7, when the number of relay stations participating in the grouping is small, grouping by an intuitive method may be more efficient than the above-described coloring technique. On the other hand, when the number of relay stations participating in the grouping increases, grouping by the coloring technique may be more efficient than grouping by the intuitive method.

5 illustrates an interference measurement procedure of a relay station in a relay wireless communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, in step 501, the RS broadcasts a beacon signal so that other RSs measure interference. Here, the beacon signal may be transmitted using a specific resource region, an uplink sounding channel or a preamble region.

Thereafter, the RS proceeds to step 503 to check whether a beacon signal is received from other RSs. Here, the operation order of steps 501 and 503 may be changed in some cases.

Here, if the beacon signal is exchanged through the uplink sounding channel, the relay station transmits the beacon signal once, and receives the beacon signals of the remaining relay stations over a number of times while not transmitting itself. In addition, when the beacon signal is the preamble signal, the relay station simultaneously receives the preamble signal from the remaining relay stations, and transmits the preamble signal as many times as the number of the remaining relay stations.

After receiving the beacon signal from the other relay stations, the relay station proceeds to step 505 to measure the beacon signal strength from each repeater. That is, the repeater measures the degree of interference by measuring the received signal strength of the beacon signal.

After measuring the degree of interference, the RS proceeds to step 507 to feed back the interference information to the base station. For example, the interference information may be one of a predetermined number of repeater identifiers with severe interference, repeater identifier information having a certain level of interference, or received signal strength information from all the other repeaters.

6 illustrates a resource allocation procedure of a base station in a relay wireless communication system according to an embodiment of the present invention.

Referring to FIG. 6, the base station determines whether interference information is fed back from each repeater in step 601. For example, the interference information may be one of a predetermined number of repeater identifiers with severe interference, repeater identifier information having a certain level of interference, or received signal strength information from all the other repeaters.

When the interference information is received from each repeater, the base station proceeds to step 603 to generate a repeater interference information table using the received interference information. For example, the interference information table is generated as shown in Table 1 above.

After generating the interference information table, the base station proceeds to step 605 to refer to the interference information table to group relay stations that can use the same resource without interference. Here, as an example of the grouping, a coloring technique as shown in FIG. 7 may be used.

After performing the grouping, the base station proceeds to step 607 to schedule to reuse the resources between the relay stations in the same group.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the resource reuse pattern is determined by using the interference information measured by each relay station in the relay type wireless communication system, so that resource management can be efficiently performed even when the relay stations are irregularly arranged.

Claims (39)

In the wireless communication system of the relay method, N relay stations that exchange beacon signals with different relay stations in a cell to measure mutual interference, and feed back the measured interference information to a base station; And a base station for allocating resources for the N relay stations to reuse resources using interference information fed back from each of the N relay stations. The method of claim 1, The N relay stations, And when at least one relay station transmits the beacon signal using an uplink sounding channel, the remaining relay stations receive the beacon signal. The method of claim 2, The base station, And controlling the transmission and reception of the beacon signals of the N relay stations through a control message. The method of claim 2, The N relay stations, And transmitting and receiving the beacon signal according to a pattern corresponding to an initial value notified from a base station during initial access. The method of claim 1, The beacon signal is a preamble signal, The N relay stations,  And if N-1 relay stations simultaneously transmit a preamble signal, one relay station simultaneously receives preamble signals from the N-1 relay stations. The method of claim 5, The base station, And controlling transmission and reception of the preamble signals of the N relay stations through a control message. The method of claim 5, The N relay stations, And transmitting and receiving the preamble signal according to a pattern corresponding to an initial value notified from the base station during initial access. The method of claim 1, The N relay stations, A system for feeding back identifier (ID) information of relay stations whose interference level is greater than or equal to a threshold. The method of claim 1, The N relay stations, And feeding back identifier information of a predetermined number of relay stations in order of interference. The method of claim 1, The N relay stations, And feedback the beacon signal reception strength information from each relay station. The method of claim 1, The base station, Grouping at least one relay station that can use the same resource without interference by referring to the interference information fed back from the N relay stations, and scheduling the resource to be reused by the at least one relay station belonging to the same group system. In a relay station apparatus in a wireless communication system of a relay method, A communication unit for transmitting a beacon signal for interference measurement and receiving a beacon signal from other relay stations, A measuring unit for measuring received signal strength from the other relay stations using the beacon signal; And a discriminating unit for determining an interfering relay station according to a feedback format with reference to the received signal strength. The method of claim 12, And a generation unit for generating a feedback message including information provided from the determination unit. The method of claim 12, The communication unit, characterized in that for transmitting and receiving the beacon signal through an Up-Link Sounding (Up-Link Sounding) channel. The method of claim 14, The communication unit, Receiving a beacon signal from one relay station in one time interval, and transmitting a beacon signal once when receiving a beacon signal once from all other relay stations in the cell. The method of claim 12, The beacon signal, characterized in that the preamble (Preamble) signal. The method of claim 16, The communication unit, And simultaneously receive the preamble signal from all other relay stations in the cell and transmit the preamble signal as many times as the number of all other relay stations in the cell. The method of claim 12, The determination unit, And when the feedback format is a predetermined number of ID station identifier (ID) information, selecting a predetermined number of relay stations with the most interference. The method of claim 12, The determination unit, And if the feedback format is relay station identifier information having a predetermined level or more of interference, the relay station having a received signal strength of a threshold value or more is selected. The method of claim 12, The determination unit, And if the feedback format is received signal strength information for all other relay stations, outputting received signal strength information from each relay station. A base station apparatus in a relay wireless communication system, A communication unit for receiving interference information from each relay station, A storage unit for storing mutual interference information tables between relay stations using interference information collected from each relay station; And a scheduler that groups at least one relay station that can use the same resource without interference with reference to the interference information, and schedules the at least one relay station belonging to the same group to reuse the resource. The method of claim 21, The interference information is characterized in that the identifier (ID: IDentifier) information of a predetermined number of severely interrupted relay stations determined by each relay station. The method of claim 20, And the interference information is identifier information of a relay station whose received signal strength measured at each relay station is greater than or equal to a threshold value. The method of claim 21, And the interference information is received signal strength information of all relay stations measured at each relay station. The method of claim 21, And the storage unit stores a table indicating whether resources can be shared for each relay station pair. In the relay measuring method of the relay station in a wireless communication system of the relay method, Receiving a beacon signal for interference measurement from other relay stations, Measuring received signal strength from the other RSs using the beacon signal; And constructing and feeding back interference information with reference to the received signal strength. The method of claim 26, Transmitting the beacon signal to the other relay stations. The method of claim 27, And the beacon signal is transmitted and received through an up-link sounding channel. The method of claim 28, The process of transmitting and receiving the beacon signal, Receiving a beacon signal from one relay station in one time interval, Transmitting a beacon signal once when receiving a beacon signal once from all other relay stations in the cell. The method of claim 27, The beacon signal, characterized in that the preamble (Preamble) signal. The method of claim 30, The process of transmitting and receiving the preamble signal, Simultaneously receiving a preamble signal from all other relay stations in the cell; Transmitting the preamble signal as many times as the number of all other relay stations in the cell. The method of claim 26, And wherein the interference information is a predetermined number of ID station identifier (ID) information having the most interference. The method of claim 26, And the interference information is identifier information of a relay station having a received signal strength equal to or greater than a threshold. The method of claim 26, The interference information is received signal strength information for all other relay stations. In the method of allocating resources of a base station in a relay wireless communication system, Receiving interference information from each relay station, Constructing a mutual interference information table between RSs using interference information collected from each RS; Grouping at least one relay station that can use the same resource without interference by referring to the interference information; Scheduling the resource to be reused by the at least one relay station belonging to the same group. The method of claim 35, wherein The interference information is characterized in that the identifier (ID: IDentifier) information of a predetermined number of severely interfered stations determined by each relay station. The method of claim 35, wherein And the interference information is identifier information of a relay station having a received signal strength measured at each relay station equal to or greater than a threshold value. The method of claim 35, wherein The interference information is characterized in that the received signal strength information of all the relay stations measured at each relay station. The method of claim 36, And the interference information table indicates whether resources can be shared for each relay station pair.

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