KR20080036344A - Method and apparatus for allocating bandwidth for arq feedback in wireless communication system - Google Patents

Abstract

A method and an apparatus for allocating bandwidth for ARQ feedback in a wireless communication system are provided to reduce the transmission time of ARQ feedback message to a base station by allocating reverse direction data to a terminal. In a method for allocating bandwidth for ARQ(Automatic Repeat Request) feedback in a wireless communication system, downward link data to be transmitted to a terminal is configured(503). The configured downward link data is transmitted to the terminal. A timer for measuring the transmitting time is activated(509). Whether the timer is activated or the transmission of a data packet is terminated(511-517) is checked. When the timer is activated or the transmission of a data packet is terminated, a reverse bandwidth is allocated to the terminal(513-519).

Description

Method and apparatus for band allocation for automatic retransmission feedback in wireless communication system {METHOD AND APPARATUS FOR ALLOCATING BANDWIDTH FOR ARQ FEEDBACK IN WIRELESS COMMUNICATION SYSTEM}

1 illustrates a signal flow for allocating a band for automatic retransmission (ARQ) feedback in a wireless communication system according to the prior art;

2 is a diagram illustrating an example of allocating a band for ARQ feedback in a wireless communication system according to the prior art;

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

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

5 is a diagram illustrating a procedure for allocating a band for ARQ feedback in a base station of a wireless communication system according to an embodiment of the present invention;

6 is a diagram illustrating a procedure for allocating a band for ARQ feedback in a terminal of a wireless communication system according to an embodiment of the present invention;

7 is a diagram illustrating an example of allocating a band for ARQ feedback according to whether data is transmitted in a wireless communication system according to an embodiment of the present invention; and

8 illustrates an example of allocating a band for ARQ feedback according to time in a wireless communication system according to an exemplary embodiment of the present invention.

The present invention relates to a band allocation method and apparatus for automatic retransmission (ARQ) feedback in a wireless communication system. Particularly, the present invention relates to a timer and data for measuring a predetermined time when downlink data is transmitted from a base station. The present invention relates to a method and apparatus for allocating a reverse band for ARQ feedback to a corresponding terminal by using transmission completion detection of a packet.

In the 4th Gen (4G) communication system, which is the next generation communication system, active research is being conducted to provide users with various quality of service services having a transmission rate of about 100 Mbps. have. In particular, current 4G communication systems guarantee mobility and quality of service for broadband wireless access communication systems such as wireless local area network systems and metropolitan area network systems. Researches are being actively conducted to support high-speed services, and the representative communication system is an IEEE (Institute of Electrical and Electronics Engineers) 802.16e communication system.

In the IEEE 802.16e communication system, an automatic retransmission (ARQ) scheme may be used for stable and reliable data transmission. The ARQ technique is a technique for requesting retransmission to the transmitting end for lost data in which an error is detected by detecting an error of data received at a receiving end, and a dynamic service flow between the transmitting end and the receiving end, that is, the base station and the terminal. The ARQ scheme may be applied to data transmitted in the connection by determining whether to use the connection when creating a connection for dynamic service flow.

In the wireless communication system, the mobile station transmits an ARQ feedback message (ARQ_Feedback_IE) indicating whether the received data is in error by requesting reverse band allocation to the base station that has transmitted data through the connection using the ARQ scheme.

1 illustrates a band allocation signal flow for automatic retransmission (ARQ) feedback in a wireless communication system according to the prior art.

As shown in FIG. 1, when the base station 100 transmits data to the terminal 110 through a connection using the ARQ scheme in step 120, the terminal 110 transmits a bandwidth request (BandWidrth Request) in step 122; Hereinafter, a ranging code for 'BW-REQ' is transmitted to the base station 100. The base station 100 receiving the ranging code allocates a reverse band to the terminal 110 to transmit the bandwidth request header (BW-REQ header) in step 124, and the terminal 110 in step 126. The bandwidth request header for requesting a band having a predetermined size through the allocated band is transmitted to the base station 100. Thereafter, the base station 100 allocates the reverse band corresponding to the requested size to the terminal 110 in step 128, and the terminal 110 allocated the reverse band from the base station 100 in step 130. An ARQ feedback message indicating whether the transmitted data is in error (ACK / NACK) is transmitted to the base station 100 through the allocated band.

As described above, in the wireless communication system according to the prior art, the band for the ARQ feedback is allocated by performing a bandwidth request procedure between the base station and the terminal. However, the bandwidth request and allocation procedure between the base station and the terminal is a complicated procedure for transmitting and receiving a bandwidth request ranging code, a bandwidth request header, and the like, as shown in FIG. 1. As shown in FIG. A problem arises in that ARQ feedback on data transmitted to the UE is performed after several frames. In addition, as the ARQ feedback is performed late, a problem arises in that retransmission of the error-prone data is also performed late.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method and apparatus for allocating bands for automatic repeat request feedback in a wireless communication system.

Another object of the present invention is to provide a method and apparatus for reducing ARQ feedback time by allocating a band for ARQ feedback in downlink data transmission in a wireless communication system.

Still another object of the present invention is to provide a method and apparatus for allocating a band for ARQ feedback to a corresponding terminal by detecting that a predetermined time has elapsed when transmitting downlink data in a base station of a wireless communication system.

Another object of the present invention is to provide a method and apparatus for allocating a band for ARQ feedback to a corresponding terminal by detecting a data packet transmission completion when downlink data transmission is performed by a base station of a wireless communication system.

According to a first aspect of the present invention for achieving the above object, a band allocation method for automatic repeat request (hereinafter referred to as 'ARQ') feedback in the base station of the wireless communication system, to the terminal via ARQ connection Configuring a downlink data to be transmitted, operating a timer for transmitting the configured downlink data to the terminal and measuring a predetermined time; and checking whether the timer expires or transmission of one data packet is completed. And allocating a reverse band having a predetermined size to the corresponding terminal when the timer expires or when one data packet transmission is completed.

According to a second aspect of the present invention for achieving the above object, a method of receiving a band for automatic repeat request (hereinafter referred to as "ARQ") feedback in a terminal of a wireless communication system, ARQ connection from the base station When receiving downlink data, operating a timer for measuring a predetermined time; checking whether the timer expires or one data packet is completed; and when the timer expires or the one data packet When the reception is completed, the step of receiving a reverse band for ARQ feedback from the base station characterized in that it comprises.

According to a third aspect of the present invention for achieving the above objects, a band allocation apparatus for automatic repeat request (hereinafter referred to as 'ARQ') feedback in the base station of the wireless communication system, to the terminal via ARQ connection After operating the data configuration unit for configuring the downlink data to be transmitted, the transceiver for transmitting the downlink data to the terminal through the ARQ connection, and the timer for measuring a predetermined time when the downlink data is transmitted, An ARQ control and inspection unit for controlling a scheduler by checking whether the timer expires or transmission of one data packet to the terminal, and allocating a reverse band having a predetermined size to the terminal according to the control of the ARQ control and inspection unit. It characterized by including the scheduler.

According to a fourth aspect of the present invention for achieving the above objects, a method for receiving a band for automatic repeat request (hereinafter referred to as 'ARQ') feedback in a terminal of a wireless communication system, ARQ connection from the base station And a transceiver for receiving downlink data and a timer for measuring a predetermined time when the data is received, checking whether the timer expires or completing reception of one data packet and is allocated from the base station. It characterized in that it comprises an ARQ control and inspection unit for identifying the reverse band.

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 provides a method and apparatus for allocating a band for automatic retransmission (ARQ) feedback to a corresponding terminal by detecting a completion time of a data packet and a timer measuring a predetermined time when transmitting downlink data from a base station of a wireless communication system. Will be explained.

3 is a block diagram of a base station in a wireless communication system according to the present invention. Here, the base station is a data configuration unit 302, scheduler 304, ARQ control unit 306, subheader inspection unit 308, upper interface 310, the transceiver unit (300) of the MAC (Media Access Control) layer 300 312).

Referring to FIG. 3, first, the data configuration unit 302 of the MAC layer 300 receives downlink data when downlink data to be transmitted from the upper interface 310 to a corresponding terminal through an ARQ connection is input. Fragment or pack packets according to a preset ARQ block size to add a subheader (fragmented subheader or packetized subheader) to each ARQ block, and use this to configure downlink data bursts. And output to the transceiver unit 312. Herein, the ARQ block size is a basic size of data to be transmitted through an ARQ connection, and may be set when an ARQ connection is initially created between a base station and a terminal. The ARQ block size may be based on the ARQ block size. It is called a block. In addition, the added subheader may include an FC field as shown in Table 1 below to indicate which part of the data packet corresponds to each ARQ block.

Table 1 below shows the meaning of FC field values included in the subheader.

FC field value meaning 00 Not fragmented 01 Last piece 10 First piece 11 Middle piece

As shown in Table 1, the FC field value may indicate which part of the packet corresponds to each ARQ block.

The scheduler 304 performs scheduling for transmitting the downlink data to the corresponding terminal, and allocates a reverse band for ARQ feedback having a predetermined size to the corresponding terminal at the request of the ARQ controller 306. Here, the scheduler 304 should allocate a reverse band in consideration of the maximum size of the ARQ feedback message (ARQ_Feedback_IE) to be transmitted from the terminal. Since the base station must receive all errors of each ARQ block, the scheduler 304 allocates a reverse band of a predetermined size according to the number of ARQ blocks transmitted to the terminal, as shown in Table 2 below.

Table 2 below shows the size of the reverse band required for transmitting an ARQ feedback message in the terminal according to the number of ARQ blocks.

ARQ Block Count Reverse Band (Bytes) Remarks 1-16 17 Generic MAC Heaser (6Bytes) + MAC Management Type (1Byte) + ARQ_Feedback_IE Header (4Bytes) + ACK Map (2 Bytes ) + PDU CRC (4Bytes) 17-32 19 Generic MAC Heaser (6Bytes) + MAC Management Type (1Byte) + ARQ_Feedback_IE Header (4Bytes) +ACK Map (4 Bytes ) + PDU CRC (4Bytes) 33-64 23 Generic MAC Heaser (6Bytes) + MAC Management Type (1Byte) + ARQ_Feedback_IE Header (4Bytes) + ACK Map (8 Bytes ) + PDU CRC (4Bytes)

Here, since an error of the ARQ block is included in the ACK MAP, the size of the ACK MAP is allocated differently according to the number of ARQ blocks transmitted. Here, the one ACK MAP is composed of 2 bytes, the one ACK MAP may represent a maximum of 16 ACK / NAK. Accordingly, when the number of ARQ blocks transmitted from the base station to the terminal is 1 to 16, the size for one ACK MAP is allocated. When the number of the transmitted ARQ blocks is 17 to 32, the size for two ACK MAPs is allocated. Can be assigned.

When transmitting the downlink data through the ARQ connection, the ARQ control unit 306 detects a downlink data burst transmitted to the corresponding terminal through the ARQ connection, and controls a timer and a flag for checking the validity of the timer. Controls and processes functions for allocating a reverse band for ARQ feedback to the corresponding terminal. In other words, when the downlink data burst is configured, the ARQ controller 306 changes the state of the flag to a valid state, initializes and operates the timer, and counts the number of ARQ blocks to be transmitted. Check for expiration When the timer expires, the ARQ controller 306 requests the scheduler 304 to allocate a reverse band according to the counted number of ARQ blocks to the corresponding terminal, initializes the timer, and restarts the timer. In addition, the ARQ controller 306 allocates a reverse band according to the counted ARQ blocks when a signal indicating that the last part of the packet is transmitted is received from the subheader checker 308 during the timer operation. Requests to the scheduler 304, stops the timer operation and changes the flag to an invalid state.

The subheader checker 308 examines the subheader of each ARQ block transmitted in the downlink data burst composed of the ARQ blocks in the data structor 302 and checks whether the last part of the packet is transmitted. When checked, the ARQ controller 305 notifies that the last part of the packet is transmitted. Here, the last part of the packet is checked through the FC field value included in the subheader.

Although not shown, the transceiver 312 includes an encoder / decoder, an orthogonal frequency division modulation (OFDM) modulator / demodulator, a digital-analog converter (DAC) / analog-digital convertor (ADC), and a radio frequency (RF) processor. Then, the signal exchanged between the terminal and the base station is processed in the manner of the corresponding communication system and transmitted and received through the antenna.

4 is a block diagram of a terminal in a wireless communication system according to the present invention. Here, the terminal includes a reception data processor 402, a transmission data processor 404, a subheader checker 406, an ARQ feedback controller 408, and a transceiver 410 of the MAC layer 400.

Referring to FIG. 4, first, the reception data processor 402 of the MAC layer 400 processes data received from a base station through the transceiver 412. In particular, when ARQ blocks constituting a downlink data burst are input from the transceiver unit 412 according to the present invention, the ARQ blocks are checked for errors so as to determine whether each of the ARQ blocks is checked. Output to the processing unit 404.

The transmission data processing unit 404 generates an ARQ feedback message indicating whether an error of each ARQ block input from the reception data processing unit 402 according to a request of the ARQ feedback control unit 408 and the transmission / reception unit 410. Will output

The subheader checker 406 checks the subheader of the ARQ block from the received data inputted to the received data processor 402 through the transceiver 412 to check whether the last part of the packet is received, and the last part. When this is checked, the ARQ feedback control unit 408 notifies that the last part of the packet is received. Here, the last part of the packet is checked through the FC field value included in the subheader.

The ARQ feedback control unit 408 controls and processes functions for transmitting an ARQ feedback message for the data received through the ARQ connection to the base station when data is received by the transceiver unit 410 through an ARQ connection. do. In other words, when data is first received through the ARQ connection, the ARQ feedback control unit 408 changes the state of the flag to a valid state, initializes and operates a timer, and then the timer expires or the subheader checker ( It is checked whether a signal from 406 is received indicating that the last part of the packet has been received. When the timer expires or a signal indicating that the last part of the packet is received, the ARQ feedback control unit 408 generates an ARQ feedback message to the transmission data processing unit 404 through the reverse band allocated from the base station Request to send the ARQ feedback message.

Although not shown, the transceiver 412 includes an encoder / decoder, an orthogonal frequency division modulation (OFDM) modulator / demodulator, a digital-analog converter (DAC) / analog-digital convertor (ADC), and a radio frequency (RF) processor. Then, the signal exchanged between the terminal and the base station is processed in the manner of the corresponding communication system and transmitted and received through the antenna.

5 illustrates a procedure of allocating a band for ARQ feedback in a base station of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 5, the base station first checks whether downlink data is generated in step 501. When the downlink data is generated, the base station adds a subheader to each ARQ block by fragmenting or packetizing the downlink data packet according to a preset ARQ block size in step 503, and using the downlink data burst Configure and transmit to the terminal. Here, the ARQ block size is a basic size of data to be transmitted through the ARQ connection, and may be set when an ARQ connection is first created between the base station and the terminal, and the ARQ block size is fragmented according to the ARQ block size. It is called a block. In addition, the added subheader may include an FC field as shown in Table 1, thereby indicating which part of the data packet corresponds to each ARQ block.

When configuring the data burst, the base station checks the state of the flag for checking the validity of the timer in step 505. Here, the timer is used to synchronize synchronization between the base station and the terminal, and the flag has two states for indicating the validity of the timer. One of the two states is an ineffective state, which is a basic state, indicating that the timer is not operating and indicating that there is no downlink data allocated to the corresponding terminal or that no downlink data is transmitted through the corresponding ARQ connection. The other is a valid state, which indicates that a timer is operating normally and may indicate that the downlink data is being transmitted through the ARQ connection.

When the flag is determined to be invalid in step 505, the base station determines that the timer corresponding to the flag is not in operation, and proceeds to step 507 to change the flag to a valid state, and resets the corresponding timer. Start counting, and then proceed to step 509. On the other hand, when the flag is confirmed to be valid in step 505, the base station determines that the timer corresponding to the flag is in operation, and proceeds to step 509 while maintaining the operation of the timer in step 525.

In step 509, the base station counts the number of ARQ blocks transmitted to the terminal, and checks whether the currently transmitted ARQ block corresponds to the end of the downlink data packet in step 511. In this case, whether the last ARQ block is checked may be determined based on an FC field value in each ARQ block.

When the ARQ block transmitted in step 511 is the last ARQ block, that is, when the FC field value of the transmitted ARQ block is 01, the base station proceeds to step 513 and the number of ARQ blocks counted to the corresponding terminal is performed. Allocates reverse band according to Here, the reverse bandwidth allocated to the terminal is allocated in consideration of the maximum size of the ARQ feedback message (ARQ_Feedback_IE) to be transmitted from the terminal. Since the ARQ feedback message should indicate whether all ARQ blocks are transmitted, the base station may allocate a bandwidth having a predetermined size according to the number of ARQ blocks transmitted to the terminal, as shown in Table 2. In step 515, the base station changes the flag to an invalid state to stop the timer and ends the algorithm according to the present invention.

For example, as shown in FIG. 7, when the base station detects 701 the FC field value indicating the last portion of the data packet in the downlink data burst transmitted to the terminal before the timer expires, one data After determining that all packets have been transmitted, a reverse band may be allocated to the corresponding terminal (703).

If the transmitted ARQ block is not the last ARQ block in step 511, the base station proceeds to step 517 to check whether the timer expires after a predetermined time has elapsed. If the timer has not expired, the base station returns to step 505 to perform the following step again.

On the other hand, when the timer expires, the base station proceeds to step 519 and allocates a reverse band to the terminal according to the number of the transmitted ARQ block. Thereafter, the base station proceeds to step 521 to change the flag to an invalid state and stops the timer. Then, the base station returns to step 505 to perform the following steps again to continue transmitting data to the corresponding terminal. For example, as shown in FIG. 8, when the timer expiration is detected 801 before the last data packet is transmitted to the terminal, the base station is configured for data transmitted during the time that the timer is operated to the terminal. The reverse band may be allocated 805. When the timer expires 801, the base station initializes the timer to continuously transmit data to the terminal 803, and whether the initialized timer expires again or the last data packet is transmitted to the terminal. Detect.

6 illustrates a procedure of allocating a band for ARQ feedback in a terminal of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 6, the terminal checks whether data is received from the base station through the ARQ connection in step 601. When data is received through the ARQ connection, the terminal checks the flag state for checking the validity of the timer in step 603. Here, the timer is used to synchronize synchronization between the base station and the terminal, and the flag has two states for indicating the validity of the timer. One of the two states is an ineffective state, which is a basic state, indicating that the timer is not operating and indicating that there is no downlink data allocated to the corresponding terminal or that no downlink data is transmitted through the corresponding ARQ connection. . The other is a valid state, which indicates that a timer is operating normally and may indicate that the downlink data is being transmitted through the ARQ connection.

If the flag is determined to be in an invalid state in step 603, the terminal determines that the timer corresponding to the flag is not in operation, and proceeds to step 605 to change the flag to a valid state and the corresponding timer. After resetting to start counting, proceed to step 607 below. In contrast, when the flag is confirmed to be valid in step 605, the terminal determines that the timer corresponding to the flag is in operation, and proceeds to step 607 while maintaining the operation of the timer in step 619.

In step 607, the terminal stores the reception result of the data received from the base station, that is, whether each ARQ block is in error. In step 609, the terminal checks whether the received ARQ block is the last ARQ block. Here, the inspection of the last ARQ block can be determined through the FC field value included in each ARQ block.

When the ARQ block received in step 611 is the last ARQ block, that is, when the FC field value of the received ARQ block is 01, the terminal proceeds to step 611 and checks the bandwidth allocated from the base station. In the step, an ARQ feedback message indicating whether an error of each stored ARQ block is generated and transmitted to the base station through the allocated bandwidth. In step 615, the terminal stops the operation of the timer, changes the flag to an invalid state, and ends the algorithm according to the present invention.

For example, as shown in FIG. 7, when the terminal detects 701 an FC field value indicating the last part of a data packet in a data burst received from the base station before the timer expires, the terminal receives a reverse band from the base station. Receives an assignment 703 and transmits an ARQ feedback message for the received data (705).

If the received ARQ block is not the last ARQ block in step 609, the terminal proceeds to step 617 and determines whether the timer expires after a predetermined time has elapsed. If the timer has not expired, the terminal returns to step 603 to perform the following steps again.

On the other hand, when the timer expires, the terminal proceeds to step 611 to check the bandwidth allocated from the base station, and in step 613 generates an ARQ feedback message indicating whether each of the stored ARQ block is lost, the allocated The bandwidth is transmitted to the base station. In step 615, the terminal stops the operation of the timer and changes the flag to an invalid state. For example, as shown in FIG. 8, when the terminal expires before the last packet is received from the base station (801), the terminal receives a reverse band from the base station (805) and the time when the timer is operated. May transmit 807 an ARQ feedback message for the received data. When the timer expires 801, the terminal initializes the timer to continuously receive the data 803, and detects whether the initialized timer expires again or the last data packet is received.

Then, the algorithm according to the present invention is terminated.

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 present invention detects when a predetermined time expires or when data transmission is completed while the base station transmits data to the corresponding terminal in the wireless communication system and allocates reverse data to the corresponding terminal, thereby allocating reverse data to the base station. It is possible to reduce the time until the ARQ feedback message ARQ_Feedback_IE is transmitted, thereby retransmitting downlink data having an error in a short time. In addition, by using the timer for measuring the predetermined time and the flag for checking the validity of the timer, by synchronizing the synchronization between the base station and the terminal and the reverse band to the terminal without the process of requesting the reverse bandwidth as in the prior art There is an effect that can be assigned.

Claims (22)

In the band allocation method for automatic retransmission (hereinafter referred to as 'ARQ') feedback in the base station of the wireless communication system, Configuring downlink data to be transmitted to the terminal through an ARQ connection; Operating a timer for transmitting the configured downlink data to the terminal and measuring a predetermined time; Checking whether the timer expires or transmission of one data packet is completed; And allocating a reverse band of a predetermined size to the corresponding terminal when the timer expires or when the transmission of one data packet is completed. The method of claim 1, The data packet may be fragmented or packetized according to a preset ARQ block size and configured as an ARQ block including a subheader. The method of claim 1, The completion of one data packet transmission is checked through an FC field included in a subheader of each ARQ block constituting the data packet. The method of claim 1, The size of a reverse band allocated to the terminal is differently allocated according to the number of ARQ blocks constituting a data packet transmitted to the terminal. The method of claim 1, When the timer expires and the transmission of one data packet is not completed, initializing the expired timer and operating the same again; And allocating a reverse band by checking whether the reactivated timer expires or the transmission of one data packet is completed. In a method of allocating a band for automatic retransmission (ARQ) feedback in a terminal of a wireless communication system, Operating a timer for measuring a predetermined time when downlink data is received from the base station through the ARQ connection; Checking whether the timer expires or one data packet reception is completed; When the timer expires or when the reception of one data packet is completed, receiving a reverse band for ARQ feedback from the base station. The method of claim 6, Generating an ARQ feedback message indicating whether the received data is in error when the reverse band is allocated; Transmitting the generated ARQ feedback message on the allocated reverse band. The method of claim 6, The data packet may be fragmented or packetized according to a preset ARQ block size and configured as an ARQ block including a subheader. The method of claim 6, The completion of one data packet transmission is checked through an FC field included in a subheader of each ARQ block constituting the data packet. The method of claim 6, The size of the reverse band is differently allocated according to the number of ARQ blocks constituting the received data packet. The method of claim 6, When the timer expires and the transmission of one data packet is not completed, initializing the expired timer and operating the same again; And checking whether the reactivated timer expires or the transmission of the one data packet is completed and receiving a reverse band. In the band allocation apparatus for automatic retransmission (hereinafter referred to as "ARQ") feedback from the base station of the wireless communication system, A data configuration unit constituting downlink data to be transmitted to the terminal through an ARQ connection; A transceiver for transmitting the downlink data to the terminal through the ARQ connection; An ARQ control and inspection unit for controlling a scheduler by operating a timer measuring a predetermined time when the downlink data is transmitted, and checking whether the timer expires or whether one data packet is transmitted to the terminal; And the scheduler for allocating a reverse band having a predetermined size to the terminal according to the control of the ARQ control and inspection unit. The method of claim 12, The ARQ control and inspection unit, A subheader checker which checks the subheader of each ARQ block constituting the data packet transmitted to the terminal and checks whether one data packet transmission is completed; And an ARQ controller for outputting a signal for allocating reverse data to the scheduler when the timer expires or the transmission of one data packet is completed while data is being transmitted to the terminal by operating the timer. Device characterized in that. The method of claim 12, And the data packet is fragmented or packetized according to a preset ARQ block size and configured as an ARQ block including a subheader. The method of claim 12, The completion of one data packet transmission is checked through an FC field included in a subheader of each ARQ block constituting the data packet. The method of claim 12, The size of the reverse band allocated to the terminal, characterized in that differently allocated according to the number of ARQ blocks constituting a data packet transmitted to the terminal. In an apparatus for receiving a band for automatic retransmission (ARQ) feedback from a terminal of a wireless communication system, A transceiver for receiving downlink data from the base station through an ARQ connection; When the data is received, and operates the timer for measuring a predetermined time, and the ARQ control and checking unit for checking the reverse band allocated from the base station by checking whether the timer expires or the reception of one data packet is completed; Device characterized in that. The method of claim 17, The ARQ control and inspection unit, A subheader checker which checks a subheader of each ARQ block constituting the received data packet and checks whether one data packet reception is completed; And an ARQ feedback controller configured to check a reverse band allocated from the base station through the transceiver, when the timer expires during the data reception or when the reception of one data packet is completed by operating the timer. . The method of claim 17, And the data packet is fragmented or packetized according to a preset ARQ block size and configured as an ARQ block including a subheader. The method of claim 17, The completion of one data packet is checked through an FC field included in a subheader of each ARQ block constituting the data packet. The method of claim 17, The allocated reverse band size is differently allocated according to the number of ARQ blocks constituting the received data packet. The method of claim 17, The ARQ control and inspection unit requests generation of an ARQ feedback message when the allocated reverse band is confirmed. A received data processor for checking whether each ARQ block constituting the received data packet is in error; The apparatus further comprises a transmission data processor for generating and outputting an ARQ feedback message indicating the error in response to a request of the ARQ control and inspection unit.

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