KR20080047001A - Apparatus and method for resource allocation for multi-hop relay broadband wireless access communication system - Google Patents

Abstract

An apparatus and a method for resource allocation in a multi-hop relay BWA(Broadband Wireless Access) communication system are provided to allocate resources dynamically according to a frame structure for supporting multiple frequency bandwidths and the traffic load of each link, thereby supporting a relay service using the multiple frequency bandwidths and solving the efficiency deterioration of resources caused by the unbalance of load by each link. An i-numbered frame(300) is divided into a downlink sub frame(310) and an uplink sub frame(320) as time resources. The downlink sub frame and the uplink sub frame are divided into a first section(311,321) and a second section(313,323) by using the time resources. A TTG(Transmit/Receive Transition Gap)(331) of a time protection area exists between the downlink sub frame and the uplink sub frame. An RTG(Receive/Transmit Transition Gap)(333) of a time protection area exists between the i-numbered frame and an (i+1)-numbered frame. A BS(Base Station)(350) transmits a preamble, control information and a downlink burst successively to a terminal 1 connected by a link during the first section of the downlink sub frame. The BS transmits control information, a downlink burst, and a post amble to an RS(Relay Station)(360) successively during the second section. The control information included in the second section includes the resource allocation information of the control information about the resource allocation information of a control information area which the RS transmits to the terminal 1. The BS receives an uplink burst from the terminal 1 during the first section of the uplink sub frame. The BS receives the uplink burst from the RS during the second section. The RS transmits a preamble, control information, and a downlink burst successively to a terminal 2 connected by a relay link during the first section of the downlink sub frame. The RS receives control information, a downlink burst, and a post preamble from the BS during the second section successively. The RS receives the uplink burst from the terminal 2 during the first section of the uplink sub frame. The RS transmits the uplink burst received from the terminal 2 during the first section to the BS during the second section. An R-TTG(Relay TTG)(335) of a time protection area exists between the first section and second section of the downlink sub frame. An R-RTG(Relay RTG)(337) of a time protection area exists between the first section and second section of the uplink sub frame.

Description

A resource allocation apparatus and method in a multi-hop relay broadband wireless access communication system

1 is a diagram showing the configuration of a broadband wireless access communication system using a general relay method;

2 is a diagram illustrating a frame structure of a broadband wireless access communication system using a relay method according to the prior art;

3 is a diagram illustrating a frame structure of a multi-hop relay broadband wireless access communication system according to an embodiment of the present invention;

4 is a diagram illustrating a frame structure of a broadband wireless access communication system supporting a multi-hop relay service using multiple frequencies according to an embodiment of the present invention;

5 is a diagram illustrating a frame structure for dynamically allocating resources in a multi-hop relay broadband wireless access communication system according to an embodiment of the present invention;

6 is a diagram illustrating a frame structure for dynamically allocating resources in a multi-hop relay broadband wireless access communication system according to another embodiment of the present invention;

7 is a diagram illustrating an operation procedure of a base station for dynamically allocating resources in a multi-hop relay broadband wireless access communication system according to an embodiment of the present invention;

8 is a block diagram of a base station for dynamically allocating resources in a multi-hop relay broadband wireless access communication system according to the present invention.

The present invention relates to a broadband wireless access communication system using a multi-hop relay method, and more particularly, to an apparatus and method for dynamically allocating resources of each link in a broadband wireless access communication system using the multi-hop relay method. . Here, the link includes a base station and relay station link, a base station and terminal link, and a relay station and terminal link.

In the fourth generation communication system, which is the next generation communication system, active research is being conducted to provide subscribers with various quality of service (Qos) having a transmission speed of about 100Mbps or more. In particular, the fourth generation communication system is actively researched to support high-speed services in the form of guaranteeing the service quality in consideration of mobility (Mobility).

In general, in the fourth generation communication system, very small radius cells are installed to enable high-speed communication and to accommodate a larger amount of communication. In this case, the design of the centralized wireless communication system using the current wireless network design method is expected to be impossible. Accordingly, the fourth generation communication system should be able to actively cope with environmental changes such as the addition of a new base station while being distributedly controlled and constructed. Accordingly, the fourth generation communication system requires a self-configuring wireless network capable of providing a mobile communication service by autonomously or distributedly configuring a wireless network without control of a central system.

In order to realistically implement the self-configuring wireless network, a technology applied in an ad-hoc network should be introduced into a wireless communication system. That is, the multi-hop relay method of the ad-hoc network is introduced into a wireless access network composed of fixed base stations in the wireless communication system.

In the general wireless communication system, since a communication is performed by a direct link between a fixed base station and a mobile station, a reliable wireless communication link can be easily configured between the terminal and the base station. However, since the location of the base station is fixed, the flexibility of the wireless network configuration is low. Therefore, there is a problem in that it is difficult to provide an efficient service in a wireless environment in which traffic distribution or call demand is severely changed.

In order to overcome this disadvantage, it is possible to use a multi-hop relay service that delivers data by using various terminals or relay stations in the vicinity. The wireless communication system using the relay method can quickly reconfigure the network in response to changes in the communication environment, it is possible to operate the entire wireless network more efficiently. In addition, by configuring a relay path through the relay station existing between the base station and the terminal, it is possible to provide the terminal with a radio channel having a better channel state. In addition, by using the relay path, a high-speed data channel can be provided to terminals in a region that cannot communicate with the base station, such as a shaded region, thereby expanding a cell region.

1 illustrates a configuration of a wireless communication system using a general relay method.

As shown in FIG. 1, the terminal 1 110 included in the service area 101 of the base station 100 is directly connected to the base station 100. On the other hand, the terminal 2 (120) having a poor channel state located outside the service area 101 of the base station 100 is connected to the relay link through the relay station 130.

That is, when the base station 100 is located outside the base station service area 101 or located in a shaded area where a shielding phenomenon is severe due to a building or the like, and the channel state is poor, the terminals using the relay station 130 are used. It is possible to provide a better wireless channel to (110, 120). In this case, the multi-hop relay broadband wireless access communication system includes the base station and the terminal (BS-MS) link, the base station and the relay station (BS-RS) link, and the relay station and the terminal (RS-MS) link.

As described above, the frame structure shown in FIG. 2 is used to support the relay service in the broadband wireless access communication system.

2 illustrates a frame structure of a wireless communication system using a relay method according to the prior art.

As illustrated in FIG. 2, the frame is divided into a downlink subframe 200 and an uplink subframe 230. In this case, the downlink subframe 200 and the uplink subframe 230 are divided into first sections 210 and 231 for the direct link service and second sections 220 and 233 for the relay link service.

The first section 210 of the downlink subframe 200 is sequentially composed of a base station preamble 211, a control channel 213, and a downlink burst 215 for transmitting traffic to a terminal connected through a direct link.

The second section 220 of the downlink subframe 200 is sequentially configured as a downlink burst 225 for transmitting traffic to the relay station preamble 221 and the control channel 223 and the terminal connected to the relay link. do.

The uplink subframe 230 includes a first section 231 in which a terminal connected by the direct link transmits control information and traffic to the base station, and a terminal in which the terminal connected by the relay link transmits control information and traffic to the relay station. The second section 233 is sequentially configured.

On the other hand, between the downlink subframe 200 and the uplink subframe 230, there is a TTG (Transmit / Receive Transition Gap) 240 which is a guard region. In addition, there is a Receive / Transmit Transition Gap (RTG) 250 that is a time guard region between the uplink subframe 230 and the downlink subframe 200 of the previous frame.

When performing communication using the frame structure as shown in FIG. 2 in the multi-hop relay broadband wireless access communication system, the terminals are mutually dependent on a subject (eg, a base station or a relay station) providing the wireless communication service. Have different frame timings. That is, the terminal communicating through the direct link receives control information and traffic during the first period 210. On the other hand, since the terminal communicating with the relay link receives control information and traffic during the second period 220, the two terminals operate asynchronously with different timings.

As described above, when operating asynchronously of the terminals provided with the service from the base station or the relay station, there is a difficulty in synchronization and hand-over of each terminal.

Accordingly, an object of the present invention is to provide an apparatus and method for transparently relaying signals in a multi-hop relay broadband wireless access communication system.

Another object of the present invention is to provide an apparatus and method for transparently relaying signals using a plurality of frequency bands in a multi-hop relay broadband wireless access communication system.

Another object of the present invention is to provide an apparatus and method for dynamically allocating resources according to resource requirements of each link in a multi-hop relay broadband wireless access communication system.

According to a first aspect of the present invention for achieving the above object, the resource allocation method of a base station using at least two frequency bands in a multi-hop relay broadband wireless access communication system, the base station and the relay station link, the base station and the terminal link And checking a load of a relay station and a terminal link, and allocating resources of a first section of an uplink / downlink subframe of a first frequency band to the base station and the terminal link when the load of the base station and the terminal link is large. Allocating resources of the second section of the uplink / downlink subframe of the first frequency band to the base station and the relay station link; and assigning resources of the uplink / downlink subframe of the second frequency band to the base station. And assigning to a terminal link.

According to a second aspect of the present invention, a resource allocation method of a base station in a multi-hop relay broadband wireless access communication system includes the steps of checking a load of a base station and a relay station link, a base station and a terminal link, and a relay station and a terminal link; When the load of the base station and the relay station link is large, allocating resources of a downlink subframe to the base station and the relay station link, allocating resources of a first section of an uplink subframe to the relay station and the terminal link; And allocating resources of a second section of the uplink subframe to the base station and the relay station link.

According to a third aspect of the present invention, a base station apparatus using at least two frequency bands in a multi-hop relay broadband wireless access communication system includes a base station and a relay station link, a base station and terminal link, and a relay station and terminal link load. A scheduler for allocating the resources of the links, a transmitter for generating a signal for each frequency band according to the resource allocation information, and transmitting signals, and a receiver for receiving signals for each frequency band according to the resource allocation information. Characterized in that the configuration.

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, the present invention describes a technique for dynamically allocating the resources of each link according to the traffic load of each link in a broadband wireless access communication system using a multi-hop relay method. Here, the link includes a base station and relay station link, a base station and terminal link, and a relay station and terminal link.

In the following description, a wireless communication system using a time division duplex orthogonal frequency division multiplexing access scheme is described as an example, and the same may be applied to other multiple access schemes.

In the following description, the broadband wireless access communication system performs communication using a frame structure as shown in FIG. 3 to maintain synchronization between a terminal receiving a service through a direct link and a terminal receiving a service through a relay link.

3 illustrates a frame structure of a multi-hop relay broadband wireless access communication system according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the i-th frame 300 includes a downlink subframe 310 and an uplink subframe 320 divided into time resources. In addition, the downlink subframe 310 and the uplink subframe 320 are divided into first sections 311 and 321 and second sections 313 and 323 using time resources. Here, a TTG (Transmit / Receive Transition Gap), which is a time protection region, exists between the downlink subframe 310 and the uplink subframe 320. In addition, a RTG (Receive / Transmit Transition Gap) 333 is provided between the i th frame 300 and the (i + 1) th frame 370.

The base station 350 sequentially transmits a preamble, control information, and a downlink burst to the terminal 1 connected by a direct link during the first period 311 of the downlink subframe 310. Here, the control information includes resource allocation information of the first period (311, 321) included in the downlink subframe 310 and uplink subframe 320 for the base station and the terminal link.

Subsequently, the base station 350 sequentially transmits control information, a downlink burst, and a postamble to the relay station 360 during the second period 313. Here, the control information includes resource allocation information of second periods 313 and 323 included in the downlink subframe 310 and the uplink subframe 320 for the base station and the relay station link. In addition, the control information includes resource allocation information for the control information of the (i + 1) th frame 370 for the relay station included in the downlink burst. That is, the downlink burst includes control information including resource allocation information of a control information region transmitted from the RS to the UE in a first section included in the downlink subframe of the (i + 1) th frame 370. Include. Accordingly, the control information included in the second section 313 includes resource allocation information of control information for resource allocation information of a control information region transmitted to the terminal by the RS included in the downlink burst.

The base station 350 receives an uplink burst from the terminal 1 during the first period 321 of the uplink subframe 320. Thereafter, the base station 350 receives an uplink burst from the relay station 360 during the second period 323.

The relay station 360 sequentially transmits a preamble, control information, and a downlink burst to the terminal 2 connected to the relay link during the first period 311 of the downlink subframe 310. Here, the control information includes resource allocation information of the first interval 311 and 321 included in the downlink subframe 310 and the uplink subframe 320 included in the relay station and the terminal link. In addition, the downlink burst refers to a downlink burst which relays the downlink burst provided from the base station to the terminal during the (i-1) th frame.

Thereafter, the RS 360 sequentially receives control information, a downlink burst, and a postamble from the BS 350 during the second period 313.

The relay station 360 receives an uplink burst from the terminal 2 during the first period 321 of the uplink subframe 320. Thereafter, the relay station 360 transmits an uplink burst provided from the terminal 2 to the base station 350 during the first period 321 during the second period 323.

In this case, in the RS frame, there is a R-TTG (Relay TTG), which is a time protection region, between the first section 311 and the second section 313 of the downlink subframe 310. In addition, a time protection region R-RTG (Relay RTG) exists between the first section 321 and the second section 323 of the uplink subframe 320.

If the base station uses two frequency bands, the frame can be extended as shown in FIG. 4. Here, when the relay station uses one frequency band, it is assumed that two relay stations are used to provide a relay service for two frequency bands of the base station. However, when the relay station uses the same number of frequency bands as the frequency band used by the base station, one relay station may support the relay service of the base station.

4 illustrates a frame structure of a broadband wireless access communication system supporting a multi-hop relay service using multiple frequencies according to an embodiment of the present invention. Here, the frame of each frequency band of the base station and the frame of the relay stations are configured in the same manner as the frame shown in FIG.

As shown in FIG. 4, when the base station uses two frequency allocations, the base station supports a relay service using the relay station 1 460 using the first frequency band, and uses the second frequency band. By using the relay station 2 470 to support the relay service. In this case, the terminal receives a service through one frequency band.

As described above, the broadband wireless access communication system supports a relay service by dividing a frame into a section for a direct link and a section for a relay link as time resources. In another embodiment, the broadband wireless access communication system supports a relay service by dividing the frame into a band for a direct link and a band for a relay link with frequency resources.

At this time, the broadband wireless access communication system fixedly allocates the resources of the interval for the direct link and the interval for the relay link to provide a transparent service to the terminal. That is, the broadband radio access communication system fixedly allocates resources in each section so that the terminal cannot use the resources allocated for the RS. Here, the transparent service provided to the terminal means that the terminal does not recognize the existence of the relay station in the broadband wireless access communication system. That is, the transparent service, the terminal is provided with the service from the broadband wireless access communication system without distinguishing between the service over the direct link and the service over the relay link.

However, in the case of the fixed allocation of resources for the section for the direct link and the section for the relay link in the frame of the broadband wireless access communication system using the multi-hop relay method, the restriction of resource allocation occurs. Accordingly, as shown in FIG. 5 or FIG. 6, a frame structure for dynamically allocating resources according to resource requirements of each link is proposed.

First, when the required resources for the base station and the terminal link is large, the resources allocated to each link as shown in FIG. 4 is dynamically allocated as shown in FIG. 5.

5 illustrates a frame structure for dynamically allocating resources in a multi-hop relay broadband wireless access communication system according to an exemplary embodiment of the present invention. Hereinafter, a description will be given on the assumption that required resources of the base station and the terminal 2 link increase in FIG. 4.

As shown in FIG. 5, the base station allocates a second frequency resource to the base station and the terminal 2 link because the required resources of the base station and the terminal 2 link are increased.

Accordingly, the base station sequentially transmits a preamble, control information, and downlink burst to the terminal 2 during the downlink subframe 510 of the second frequency resource 550. Here, the control information includes resource allocation information of the downlink subframe 510 and the uplink subframe 520 for the base station and the terminal 2 link.

Thereafter, the base station receives an uplink burst from the terminal 2 during the uplink subframe 520.

In this case, the frame for the first frequency resource 540 of the base station and the frame for the relay station 1 (560) is configured the same as the frame shown in FIG.

Next, when the required resources for the base station and the relay station link is large, the resources allocated to each link as shown in FIG. 4 is dynamically allocated as shown in FIG.

FIG. 6 illustrates a frame structure for dynamically allocating resources in a multi-hop relay broadband wireless access communication system according to another embodiment of the present invention. Hereinafter, a description will be given on the assumption that required resources of the base station and the relay station 2 link increase in FIG. 4.

As shown in FIG. 6, the base station allocates a second frequency resource to the base station and the relay station 2 link because the required resources of the base station and the relay station 2 link are increased.

Accordingly, the base station sequentially transmits control information, downlink burst, and postamble to the relay station 2 during the downlink subframe 610 of the second frequency resource 650. Here, the control information includes resource allocation information of the downlink subframe 610 and the uplink subframe 620 for the base station and the relay station 2 link.

In this case, the base station configures a predetermined period to be null before transmitting the control information. Here, the predetermined period represents a period in which the relay station 2 670 transmits a preamble and control information to the terminal 4 connected to the relay link. That is, the relay station 2 transmits a preamble for synchronization of the terminal providing the service. Accordingly, the base station configures the interval in which the relay station 2 transmits the preamble to the terminal 4 as null.

Thereafter, the base station receives an uplink burst from the relay station 2 670 during the second period 623 of the uplink subframe 620.

The relay station 2 670 transmits the preamble and the control information to the terminal 4 during the downlink subframe 610 and then receives the control information, the downlink burst and the postamble from the base station.

Subsequently, the RS 2 670 receives an uplink burst from the UE 4 during the first period 621 of the UL subframe 620 and the UL received from the UE 4 during the second period 623. Send a burst to the base station.

Hereinafter, a method of operating a base station for dynamically allocating resources as illustrated in FIGS. 5 and 6 will be described.

7 illustrates an operation procedure of a base station for dynamically allocating resources in a multi-hop relay broadband wireless access communication system according to an embodiment of the present invention.

Referring to FIG. 7, the base station first checks resource requirements for each link in step 701. For example, the traffic load on the base station and the terminal link, the base station and the relay station link, and the relay station and the terminal link are identified.

After confirming the resource requirements of each link, the base station proceeds to step 703 to allocate resources for each link according to the resource requirements of each link. For example, as shown in FIG. 5, when the amount of resources required for the base station and the terminal link is large, the resource is allocated to the base station and the terminal link. On the other hand, as shown in FIG. 6, when the amount of resources required for the base station and the relay station link is large, the resource is allocated to the base station and the relay station link.

After allocating resources for each link, the base station proceeds to step 705 and transmits the resource allocation information to the terminal and the relay station.

After transmitting the resource allocation information, the base station proceeds to step 707 to communicate with the terminal or the relay station according to the resource allocation information.

The base station then terminates this algorithm.

8 is a block diagram of a base station for dynamically allocating resources in a multi-hop relay broadband wireless communication system according to the present invention. In the following description, a block configuration of a base station using one frequency band is described as an example.

As illustrated in FIG. 8, the relay station includes a transmitting device 801, a receiving device 803, a scheduler 805, and an RF switch 807.

First, the transmitter 801 includes a frame generator 809, a resource mapper 811, a modulator 813, and a digital / analog converter 815.

The frame generator 809 generates a frame according to a control signal provided from the scheduler 805. For example, the frame generator 809 generates a subframe for the base station and the terminal link during the first period of the downlink subframe as shown in FIG. 4, and generates the base station and the relay station link during the second period. Create a subframe for it.

If the required resources of the base station and the terminal link are large, the frame generator 809 generates a subframe for the base station and the terminal link during the downlink subframe as shown in FIG. 5.

On the other hand, when the required resources of the base station and the relay station link, the frame generator 809 generates a subframe for the base station and the relay station link during the downlink subframe, as shown in FIG.

The resource mapper 811 allocates each subframe provided from the frame generator 809 to a burst of the corresponding link and outputs the subframes.

The modulator 813 receives subframes allocated to the burst of each link from the resource mapper 811 and modulates the subframes according to a predetermined modulation scheme.

The digital-to-analog converter 815 converts the digital signal provided from the modulator 813 into an analog signal and outputs the analog signal to the RF switch 807.

Next, the reception device 803 includes an analog / digital converter 817, a demodulator 819, a resource demapper 821, and a frame extractor 823.

The analog / digital converter 817 converts an analog signal received through the RF switch 807 into a digital signal. The demodulator 819 demodulates and outputs the digital signal provided from the analog-to-digital converter 817 according to a corresponding demodulation scheme.

The resource demapper 821 extracts the actual subframes allocated to the burst of each link provided from the demodulator 819.

The frame extractor 823 extracts a subframe corresponding to the relay station from the subframe provided from the resource demapper 821. For example, the frame extractor 823 extracts a subframe for the base station and the terminal link during the first period of the uplink subframe and the base station and the relay station link during the second period as shown in FIG. 4. Extract subframes for

If the required resources of the base station and the terminal link are large, the frame extractor 823 extracts a subframe for the base station and the terminal link during an uplink subframe as shown in FIG.

On the other hand, if there is a large amount of resources required for the base station and the relay station link, the frame extraction 823 may generate a subframe for the base station and the relay station link during the second period of the uplink subframe as shown in FIG. Extract.

The RF switch 807 connects signals transmitted and received with the base station, the terminal, and other relay stations to the transmitter 801 and the receiver 803 under the control of the timing controller 805.

The scheduler 805 performs resource allocation for each link according to the traffic load of each link. For example, the scheduler 805 allocates resources to the base station and terminal link and the base station and relay station link as shown in FIG. If the required resources of the base station and the terminal link are large, the scheduler 805 allocates a large amount of resources to the base station and the terminal link as shown in FIG. On the other hand, when the required resources of the base station and the relay station link is large, the scheduler 805 allocates a lot of resources to the base station and the relay station link as shown in FIG.

Thereafter, the scheduler 805 transmits the resource allocation information to the base station, the relay station, and the terminal to configure a frame according to the resource allocation information. Here, the scheduler 805 transmits control information to the base station to configure a frame for the resource allocation information. In addition, the scheduler 805 includes the resource allocation information in the control information transmitted to the relay station and the terminal and transmits it.

The base station apparatus illustrated in FIG. 8 has been described on the assumption that one frequency band is used. If the base station uses a plurality of frequency bands, since the transceiver of FIG. 8 is the same as that for each frequency band, the base station using the one frequency band has been described as an example.

Although the above-described embodiment has been described using a base station using two frequency bands as an example, the same may be applied to the case where the base station uses two or more frequency bands.

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, in a broadband wireless access communication system using a multi-hop relay method, a relay service using a multi-band can be provided by dynamically allocating resources according to a traffic structure of each link and a frame structure for supporting a multi-band. It can support, and there is an advantage that can solve the deterioration of resource efficiency due to the imbalance of load on each link.

Claims (20)

A resource allocation method of a base station using at least two frequency bands in a multi-hop relay broadband wireless access communication system, Checking the load of the base station and the relay station link, the base station and the terminal link, and the relay station and the terminal link; Allocating resources of a first section of an uplink / downlink subframe of a first frequency band to the base station and the terminal link when the load of the base station and the terminal link is large; Allocating resources of a second section of an uplink / downlink subframe of the first frequency band to the base station and the relay station link; Allocating resources of an uplink / downlink subframe of a second frequency band to the base station and the terminal link. The method of claim 1, Transmitting the resource allocation information to the relay station and the terminal; And communicating with the relay station or the terminal according to the resource allocation information. The method of claim 1, The first period included in the downlink subframe of the first frequency band, characterized in that the synchronization channel, the control channel, and the burst to be transmitted to the terminal sequentially configured. The method of claim 1, The second period included in the downlink subframe of the first frequency band, characterized in that the control channel, the burst, the synchronization channel to be transmitted to the relay station in sequence. The method of claim 1, In the downlink subframe of the second frequency band, a synchronization channel, a control channel, and a burst to be transmitted to a terminal are sequentially configured. The method of claim 1, Allocating resources of a first section of an uplink / downlink subframe of a first frequency band to the base station and the terminal link when the load of the base station and the relay station link is large; Allocating resources of a second section of an uplink / downlink subframe of the first frequency band to the base station and the relay station link; Allocating resources of a downlink subframe of a second frequency band to the base station and the terminal link; Allocating resources of a first section of an uplink subframe of the second frequency band to the relay station and a terminal link, and allocating resources of a second section to the base station and the relay station link. . The method of claim 6, The first period included in the downlink subframe of the first frequency band, characterized in that the synchronization channel, the control channel, and the burst to be transmitted to the terminal sequentially configured. The method of claim 7, wherein The first interval is characterized in that a predetermined interval is configured to be null before transmitting the synchronization channel. The method of claim 8, The predetermined section is characterized in that the relay station is the same section as the interval for transmitting the synchronization channel and the control channel to the terminal. A resource allocation method of a base station in a multi-hop relay broadband wireless access communication system, Checking the load of the base station and the relay station link, the base station and the terminal link, and the relay station and the terminal link; Allocating a resource of a downlink subframe to the base station and the relay station link when the load of the base station and the relay station link is large; Allocating resources of a first section of an uplink subframe to the RS and the UE link; Allocating resources of a second section of the uplink subframe to the base station and the relay station link. The method of claim 10, Transmitting the resource allocation information to the relay station and the terminal; And communicating with the relay station or the terminal according to the resource allocation information. The method of claim 10, The downlink subframe includes a synchronization channel, a control channel, and a burst to be transmitted to the RS. The method of claim 12, The downlink subframe is configured to configure a predetermined interval to be null before transmitting the sync channel. The method of claim 13, The predetermined section is characterized in that the relay station is the same section as the interval for transmitting the synchronization channel and the control channel to the terminal. The method of claim 10, And allocating resources of the uplink / downlink subframe to the base station and the terminal link when the load of the base station and the terminal link is large. The method of claim 15, The downlink subframe includes a synchronization channel, a control channel, and a burst to be sequentially transmitted to a terminal. A base station apparatus using at least two frequency bands in a multi-hop relay broadband wireless access communication system, A scheduler for allocating resources of the links according to the load of the base station and the relay station link, the base station and the terminal link, and the relay station and the terminal link; Transmitters for transmitting signals by generating frames for each frequency band according to the resource allocation information; And receiving units receiving signals for each frequency band according to the resource allocation information. The method of claim 17, The scheduler, when the load of the base station and the terminal link is large, characterized in that for performing a scheduling so that a lot of resources are allocated to the base station and the terminal link. The method of claim 17, And the scheduler performs scheduling so that a large amount of resources are allocated to the base station and the relay station link when the load of the base station and the relay station link is large. The method of claim 17, And the scheduler performs scheduling so that a large amount of resources are allocated to the relay station and the terminal link when the load of the relay station and the terminal link is large.

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