KR100624619B1 - Method of transmitting and receiving data for packet data service on wide-band wireless communication system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a data transmission / reception method for a packet data service in a broadband wireless communication system and a computer-readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention provides a header of an RLC-PDU when a hybrid ARQ II / III scheme is used for packet data service in a base station of an asynchronous broadband code division multiple access (W-CDMA) mobile communication system based on a next generation mobile communication network. The purpose of the present invention is to provide a data transmission / reception method for efficiently transmitting and receiving packet data and separating a payload portion and a payload part, and a computer-readable recording medium recording a program for realizing the same.

3. Summary of Solution to Invention

The present invention relates to a data transmission method at a transmitting end for a hybrid automatic retransmission request (ARQ) II / III method used for packet data service in a wireless communication system, referred to as RLC (Radio Link Control, RLC). RLC-PDU (Radio Link Control-Protocol Data Unit, hereinafter referred to as RLC-PDU) in the header layer containing information (hereinafter referred to as RLC-header PDU) and payload (hereinafter referred to as RLC-PDU) a first step of separating into payload PDUs; A second step of configuring the RLC-header PDU and the RLC-payload PDU in one set in the RLC layer and delivering the RLC-header PDU to a MAC (Medium Access Control, MAC) layer; And a third step of transforming the RLC-header PDU and the RLC-payload PDU into a transport block (TB) that can be transmitted on a transport channel of a physical layer in the MAC layer, and then encoding and transmitting the transport channel (TB). .

4. Important uses of the invention

The present invention is used for Hybrid ARQ II / III method.

Hybrid ARQ, W-CDMA, Transport Block (TB), RLC Layer, MAC Layer

Description

Method of transmitting and receiving data for packet data service in wideband wireless communication system {Method of transmitting and receiving data for packet data service on wide-band wireless communication system}             

1 is an explanatory diagram showing a general RCPC or RCPT code.

2 is an explanatory diagram showing a relationship between a conventional RLC-PU, an RLC-PDU, a MAC-PDU, and a TB;

Figure 3 is an embodiment explanatory diagram showing the relationship between the RLC-PU, RLC-PDU, MAC-PDU, TB in accordance with the present invention.

4 is a flowchart of an embodiment of a transmission method according to the present invention;

5A and 5B are an embodiment flowchart of a receiving method according to the present invention.

* Explanation of symbols for the main parts of the drawings

TB: Transfort Block

RLC-PU: Radio Link Control-Physical Unit

RLC-PDU: Radio Link Control-Protocol Data Unit

MAC-PDU: Medium Access Control-Protocol Data Unit

The present invention relates to a data transmission / reception method for a packet data service in a broadband wireless communication system, and a computer-readable recording medium recording a program for realizing the same. Hybrid automatic retransmission used when using packet data service in base station of asynchronous broadband code division multiple access (W-CDMA) mobile communication system based on next generation mobile communication network such as 2000 (International Mobile Telecommunication) and UMTS (Universal Mobile Telecommunication Service) ARQ (Automatic Repeat for reQuest) The present invention relates to an efficient data transmission / reception method for the II / III method.

In order to facilitate understanding of the present invention, first, an automatic retransmission request (ARQ) scheme will be described in more detail.

Automatic retransmission request (ARQ) is an error control protocol that automatically detects that an error occurred during transmission and receives the block in which the error occurred. That is, one of the error control methods in data transmission is a system that automatically generates a retransmission request signal when an error is detected and retransmits it from a wrong signal.

In the next generation mobile communication system, an ARQ scheme for requesting retransmission of an error-prone packet may be used to transmit packet data.

However, due to the instability of the wireless channel environment, when using this ARQ scheme, the number of retransmission requests may increase, thereby reducing throughput, which is the amount of data that can be sent in unit time. Therefore, ARQ can be used together with Forward Error Correction Coding (FEC) to reduce this problem, and this is called a hybrid ARQ.

Hybrid ARQs include types I, II, and III according to the scheme.

In the case of Type I, one coding rate (e.g., No Coding, Rate 1/2, Rate 1/3, among Convolutional Coding) depending on the channel environment or required Quality of Service (QoS) If it is determined, it continues to use it, and the receiving end removes the previously received data when the retransmission request is requested, and the transmitting end retransmits it at the previously transmitted coding rate. In this case, since the coding rate does not change according to the variable channel environment, the throughput may be reduced compared to the types II and III.

In case of Type II, when the receiver requests retransmission of data, it does not remove it, but stores it in a buffer and combines the retransmitted data again. That is, the first coding rate is transmitted at a high coding rate, and when retransmission is requested, the coding rate is transmitted at a lower coding rate and combined with previously received data. performance can be significantly improved compared to Type I by performing maximal ratio combining. For example, if there is a mother code having a convolutional coding rate of 1/4, a punching rate is used to code a coding rate of 8/9, 2/3, 1 A coding rate such as / 4 can be created, which is called a "Rate Compatible Punctured Convolutional" code. This example is shown in FIG.

Meanwhile, a code that can be obtained by punching a Turbo code is called a "Rate Compatible Punctured Turbo" code. Referring to FIG. 1, when the first transmission is transmitted at a coding rate of 8/9, and the retransmission version (version) is ver (0), an error is detected by checking a cyclic redundancy check (CRC). If found, this data is stored in a buffer and requires retransmission. At this time, when retransmitting, the coding rate is transmitted at a coding rate of 2/3, and the version is ver (1). Here, the receiving end combines ver (0) stored in the buffer and ver (1) received, and decodes this value to check the CRC. This process is repeated until no error is found in the CRC test, and the recently transmitted ver (n) is combined with the previously transmitted ver (n-a) (0 <an).

In the case of Type III, it is almost the same as Type II. The difference is that before recombining the retransmitted data ver (n) with ver (na), first decode and then check the CRC. Send this value to the upper layer. If an error occurs, it is combined with ver (n-a) and the CRC is checked to determine whether to retransmit.

2 is an explanatory diagram showing a relationship between a conventional RLC-PU, an RLC-PDU, a MAC-PDU, and a TB.

As shown in FIG. 2, one or several RLC-PUs become one RLC-PDU, an RLC-PDU is mapped to a MAC-PDU, and a MAC-PDU is a transport block (TB) of a physical layer. ), And the CRC is added. At this time, the physical layer is transmitted after the encoding, rate matching, and interleaver are modulated. Here, the receiving end performs demodulation, deinterleaver, and decoding, and then checks the CRC to determine whether there is an error in the transmitted data. At this time, if an error exists, retransmission is requested, and the data in which the error occurs is stored in a buffer. The retransmitted RLC-PDU checks the CRC after decoding in combination with the RLC-PDU having an error stored in the buffer. In this case, it is necessary to know how many RLC-PDUs are currently received in order to combine. In addition, in the case of the hybrid ARQ type II / III, since an initial transmission is transmitted at a high coding rate, an error occurs in the header portion of the RLC-PDU.

Therefore, when a hybrid ARQ type II / III scheme is used for packet data service in a next generation mobile communication system, a method for reducing an error occurrence probability of an RLC-PDU header part is required.

The present invention proposed to meet the above requirements, the hybrid ARQ II / III for packet data service in the base station of asynchronous broadband code division multiple access (W-CDMA) mobile communication system based on the next generation mobile communication network In the case of using the method, the separation of the header and payload portion of the RLC-PDU reduces the probability of error occurrence of the header and efficiently transmits and receives packet data. The purpose is to provide a recording medium.

In accordance with another aspect of the present invention, there is provided a data transmission method at a transmitting end for a hybrid automatic retransmission request (ARQ) II / III method used for packet data service in a wireless communication system. A page containing data including a header (hereinafter referred to as RLC-header PDU) and data including an RLC-PDU (Radio Link Control-Protocol Data Unit, hereinafter referred to as RLC-PDU) in the Control (hereinafter referred to as RLC) layer. A first step of separating into loads (hereinafter referred to as RLC-payload PDUs); A second step of configuring the RLC-header PDU and the RLC-payload PDU as one set in the RLC layer and delivering the RLC-header PDU to a MAC (Medium Access Control) layer; And a third step of transforming the RLC-header PDU and the RLC-payload PDU into a transport block (TB) that can be transmitted on a transport channel of a physical layer in the MAC layer, and then encoding and transmitting the transport channel to the transport channel. Characterized in that made.

In addition, the present invention comprises a fourth step of demodulating the received RLC-PDU at the receiving end, stored in a buffer, and then decoding a transport block (hereinafter referred to as TB (h)) corresponding to the RLC- header PDU; A fifth step of checking an error of the TB (h); A sixth step of transmitting the TB (h) to the RLC layer through the MAC layer according to the check result of the fifth step; A seventh step of analyzing the information of the RLC-header PDU in the RLC layer, searching for the number of transmissions of a transport block (hereinafter referred to as TB (p)) corresponding to the RLC-payload PDU, and decoding the same to identify an error; ; And an eighth step according to the analysis result of the seventh step, upon success, removing the TB (p) from the buffer, and maintaining the data stored in the buffer and requesting retransmission to the next version upon failure. Characterized in that further comprises.

In addition, the present invention provides a method for receiving data at a receiving end for a hybrid automatic retransmission request (ARQ) II / III method used for packet data service in a wireless communication system, the received RLC-PDU (Radio Link Control) Demodulate and store in a buffer a protocol data unit (hereinafter referred to as RLC-PDU), and then a transport block corresponding to a header including information of the RLC-PDU (hereinafter referred to as RLC header PDU) (TB) (h) decoding the first step; A second step of checking the error of TB (h); A third step of transmitting the TB (h) to a Radio Link Control (RLC) layer through a MAC (Medium Access Control) layer according to the inspection result of the second step; A transport block (hereinafter referred to as TB (p)) corresponding to a payload (hereinafter referred to as RLC-payload PDU) including data in the RLC-PDU by analyzing the information of the RLC-header PDU in the RLC layer. A fourth step of identifying an error by searching and decoding a transmission number of times; And a fifth step of removing the corresponding TB (p) from the buffer upon success, maintaining the data stored in the buffer and requesting retransmission to the next version according to the analysis result of the fourth step. Characterized in that comprises a.

In addition, the present invention deletes the TB (h) and the TB (p) from the buffer when an error occurs according to the test result of the second step, and the RLC-header PDU and the RLC-payload PDU And a sixth step of requesting retransmission.

The present invention for achieving the above object, the RLC (Radio Link Control-Protocol Data Unit, RLC-PDU) in the RLC (Radio Link Control, RLC) layer to the transmitting end having a processor A first function of separating a header containing information (hereinafter referred to as RLC-header PDU) and a payload containing data (hereinafter referred to as RLC-payload PDU); A second function of configuring the RLC-header PDU and the RLC-payload PDU as one set in the RLC layer and transmitting the MAC to a medium access control (MAC) layer; And converting the RLC-header PDU and the RLC-payload PDU into a transport block (TB) that can be transmitted on a transport channel of a physical layer in the MAC layer, and then encoding and transmitting the encoded function to the transport channel. A computer readable recording medium having recorded thereon a program is provided.

The present invention also provides a fourth function of demodulating the received RLC-PDU in a receiver, storing the received RLC-PDU in a buffer, and then decoding a transport block corresponding to the RLC-header PDU (hereinafter referred to as TB (h)); A fifth function of checking an error of the TB (h); A sixth function of transmitting the TB (h) to the RLC layer through the MAC layer according to a check result of the fifth function; A seventh function of analyzing the information of the RLC-header PDU in the RLC layer, searching for the number of transmissions of a transport block (hereinafter referred to as TB (p)) corresponding to the RLC-payload PDU, and decoding the same to identify an error; ; And an eighth function according to the analysis result of the seventh function, upon success, removing the corresponding TB (p) from the buffer, maintaining the data stored in the buffer, and requesting retransmission to the next version upon failure. Provided is a computer readable recording medium having recorded thereon a program for further realization.

In addition, the present invention demodulates a received RLC-PDU (hereinafter referred to as RLC-PDU) at a receiving end having a processor, stores the information in a buffer, and includes information in the RLC-PDU. A first function of decoding a transport block (hereinafter referred to as TB (h)) corresponding to a header (hereinafter referred to as an RLC-header PDU); A second function of checking an error of the TB (h); A third function of transmitting the TB (h) to a Radio Link Control (RLC) layer through a MAC (Medium Access Control) layer according to a test result of the second function; A transport block (hereinafter referred to as TB (p)) corresponding to a payload (hereinafter referred to as RLC-payload PDU) including data in the RLC-PDU by analyzing the information of the RLC-header PDU in the RLC layer. A fourth function of checking an error number of times of transmission and decoding the same to identify an error; And a fifth function that, upon success, removes the TB (p) from the buffer upon success, maintains the data stored in the buffer and requests retransmission to the next version upon success. A computer readable recording medium having recorded thereon a program for realizing the present invention is provided.

The present invention also deletes the TB (h) and the TB (p) from the buffer when an error occurs and retransmits the RLC-header PDU and the RLC-payload PDU according to the test result of the second function. Provided is a computer readable recording medium having recorded thereon a program for further realizing a sixth function that requires data.                     

In the case of using the hybrid ARQ II / III method in asynchronous broadband code division multiple access (W-CDMA) mobile communication system based on the next generation mobile communication network, it is possible to improve performance by combining previously transmitted data and retransmitted data. In order to perform this combination, the receiver must know the information on the RLC-PDU currently being received, and the error protection for the header containing the information on the RLC-PDU must be sufficient. .

In order to guarantee this, the present invention refers to a portion including information on the RLC-PDU in RLC (hereinafter referred to as "RLC-header PDU") and a portion including data (hereinafter referred to as "RLC-payload PDU"). ). In addition, when the separated "RLC-header PDU" and "RLC-data PDU" are sequentially transmitted using one transport channel or another transport channel, the "RLC-header PDU" is transmitted. It is possible to reduce the error of the header part by encoding at low coding rate.In this case, the receiving end saves the received data in the buffer and checks only the header part. It is possible to determine if it can be processed, so it is not necessary to know the information of the RLC-PDU in advance in order to combine.

Therefore, the present invention can adjust the coding rate by separating the header portion and the payload portion of the data, thereby reducing the probability of error occurrence in the header portion, and also generates an error in the header. You can check whether you have done this separately from the payload, and also process the data by first checking the header part, so that the combination can be performed stably.                     

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating an embodiment of a relationship between an RLC-PU, an RLC-PDU, a MAC-PDU, and a TB according to the present invention.

As described above, in the case of hybrid ARQ type II / III, an error is likely to occur in the header portion of the RLC-PDU because it is transmitted at a high coding rate during initial transmission.

In order to solve this problem, in the present embodiment, the header portion of the RLC-PDU is separately transmitted as shown in FIG. 3. That is, the RLC layer separates the header portion of the RLC-PDU separately to form a "RLC-header PDU" and configures a "RLC-payload PDU" from the data portion.

In the RLC layer, this unit is configured as one set and transmitted to the MAC layer. At this time, the MAC layer transforms this into a transport block (TB) that can be transmitted through a transport channel of a physical layer. Here, the transport block TB corresponding to the "RLC-header PDU" is called TB (h), and the transport block TB corresponding to the "RLC-payload PDU" is called TB (p).

Now, the configuration of the transmitting and receiving end will be described in more detail with reference to FIGS. 4 and 5.

4 is a flowchart illustrating an embodiment of a transmission method according to the present invention.

As shown in Fig. 4, the transmitting end divides the RLC-SDU into several RLC-PUs (401) (of course, one or several of these RLC-PUs may constitute RLC-PDUs), and the RLC-PDU Are classified into "RLC-header PDU" and "RLC-payload PDU" (402).

Thereafter, the divided RLC-PDUs are configured as one set and transmitted to the MAC layer (403), which is a transport block (TB (h), TB (p) that can be transmitted through a transport channel of a physical layer. 404).

In transmission from the MAC layer to the transport channel, if the transport block (TB) is related to the "RLC-header PDU" (TB (h)), encoding is performed at a low coding rate (405,406). ), If there is a relationship with the "RLC-payload PDU" (TB (p)), encoding is performed at a coding rate suitable for a retransmission version (405, 407). In this case, when using one transport channel, after encoding the transport block (TB) of the header part, the coding rate is changed to encode the transport block related to the payload.

Next, the data is changed into a form suitable for transmission of the physical layer (for example, rate matching, interleaving, etc.) and transmitted (408).

5A and 5B are flowcharts of an embodiment of a receiving method according to the present invention.

As shown in FIGS. 5A and 5B, the receiving end stores the received transport block TB in a buffer after demodulating the received signal (501) and before decoding (501). At this time, if the transport block is TB (h), decoding is performed (503,505), otherwise it is continuously stored in the buffer (503,504).

Thereafter, the CRC test of TB (h) is performed (506) and the test result is analyzed (507).                     

As a result of the analysis, if TB (h) is transmitted to the MAC layer if successful (509), TB (h), which has performed CRC check, and TB (p), which is a payload, are removed from the buffer (508). At this time, the RLC layer requests retransmission.

Next, data (TB (h)) passing through the MAC layer is transferred to the RLC layer (510), and the contents of the header are analyzed by the RLC layer (511). At this time, it is checked whether the TB (p) is first transmitted ver (0) as a result of analyzing the header in the RLC layer (512).

As a result of verification, decoding is performed in the case of ver (0) transmitted first (513), and in case of not ver (0), decoding is performed after combining (514) with previously transmitted versions (514). (513).

After decoding (513), the CRC is checked (515) to check whether the RLC-PDU is successfully received (516).

As a result of the check, if the CRC check is successful, the TB (p) is removed from the buffer, TB (p) is transferred to the MAC layer (517), and TB (p) is transferred from the MAC layer to the RLC layer (518). .

If the CRC check fails as a result of the check, it is continuously stored in the buffer (519). At this time, the RLC layer requests retransmission.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, according to the present invention, the coding rate can be adjusted by separating the header part and the payload part of the data, thereby reducing the probability of error occurrence of the header part. Whether or not an error has occurred can be checked separately from the payload, and the header can be checked first to process the data, so that the combination can be stably performed.

Claims (16)

A data transmission method in a transmitting end for a hybrid automatic retransmission request (ARQ) II / III method used for packet data service in a wireless communication system, A header (hereinafter referred to as RLC-header PDU) and data including an RLC-PDU (Radio Link Control-Protocol Data Unit, hereinafter RLC-PDU) in the RLC (Radio Link Control, RLC) layer. A first step of separating into a payload (hereinafter referred to as RLC-payload PDU) comprising; A second step of configuring the RLC-header PDU and the RLC-payload PDU as one set in the RLC layer and delivering the RLC-header PDU to a MAC (Medium Access Control) layer; And A third step of transforming the RLC-header PDU and the RLC-payload PDU into a transport block (TB) that can be transmitted on a transport channel of a physical layer in the MAC layer, and then encoding and transmitting the transport packet to the transport channel Data transmission method for packet data service in a broadband wireless communication system comprising a. The method of claim 1, At the receiving end, A fourth step of demodulating the received RLC-PDU and storing it in a buffer, and then decoding a transport block (hereinafter referred to as TB (h)) corresponding to the RLC- header PDU; A fifth step of checking an error of the TB (h); A sixth step of transmitting the TB (h) to the RLC layer through the MAC layer according to the check result of the fifth step; A seventh step of analyzing the information of the RLC-header PDU in the RLC layer, searching for the number of transmissions of a transport block (hereinafter referred to as TB (p)) corresponding to the RLC-payload PDU, and decoding the same to identify an error; ; And An eighth step according to the analysis result of the seventh step, upon success, removing the TB (p) from the buffer, and upon failure, maintaining the data stored in the buffer and requesting retransmission to the next version; A data transmission method for a packet data service in a broadband wireless communication system further comprising. The method of claim 1, The transport block (TB), In transmission, one transport block (hereinafter referred to as TB (h)) corresponding to the RLC-payload PDU and one transport block (hereinafter referred to as TB (p)) corresponding to the RLC-payload PDU are transmitted. A data transmission method for a packet data service in a wideband wireless communication system, characterized by being sequentially encoded in a channel. The method of claim 1, The transport block (TB), In transmission, two transport blocks corresponding to the RLC-header PDU (hereinafter referred to as TB (h)) and two transport blocks corresponding to the RLC-payload PDU (hereinafter referred to as TB (p)) are transmitted. A data transmission method for a packet data service in a broadband wireless communication system, characterized in that the channel (Encoding) at the same time. The method according to any one of claims 1, 2 or 4, The encoding process of the third step, In the broadband wireless communication system, the TB (h) is encoded at a low coding rate and the TB (p) is encoded at a coding rate suitable for a retransmission version. Data transmission method for packet data service. The method according to any one of claims 1 to 3, The encoding process of the third step, In case of using one transport channel, after encoding the transport block (TB) of the header part, the coding rate is changed to encode the transport block related to the payload. A data transmission method for packet data service in a communication system. The method according to any one of claims 1 to 4, The transmitting end, A data transmission method for a packet data service in a broadband wireless communication system, characterized in that the header portion and the payload portion of the data can be adjusted to adjust coding rates. The method of claim 7, wherein At the receiving end, After storing the received data in the buffer, only the header part can be checked to determine how the data stored in the buffer can be processed, so it is necessary to know the information of the RLC-PDU in advance in order to combine. And a data transmission method for packet data service in a broadband wireless communication system. A data receiving method at a receiving end for a hybrid automatic retransmission request (ARQ) II / III method used for packet data service in a wireless communication system, After demodulating and storing the received RLC-PDU (hereinafter referred to as RLC-PDU) in a buffer, a header including information of the RLC-PDU (hereinafter referred to as RLC- header PDU) A first step of decoding a transport block corresponding to (hereinafter, referred to as TB (h)); A second step of checking the error of TB (h); A third step of transmitting the TB (h) to a Radio Link Control (RLC) layer through a MAC (Medium Access Control) layer according to the inspection result of the second step; A transport block (hereinafter referred to as TB (p)) corresponding to a payload (hereinafter referred to as RLC-payload PDU) including data in the RLC-PDU by analyzing the information of the RLC-header PDU in the RLC layer. A fourth step of identifying an error by searching and decoding a transmission number of times; And A fifth step of removing the corresponding TB (p) from the buffer upon success, maintaining the data stored in the buffer and requesting retransmission to the next version according to the analysis result of the fourth step. Data receiving method for a packet data service in a broadband wireless communication system comprising a. The method of claim 9, A sixth request for retransmission of the RLC-header PDU and the RLC-payload PDU when the error occurs, the TB (h) and the TB (p) are deleted from the buffer when an error occurs; step A data receiving method for a packet data service in a broadband wireless communication system further comprising. The method according to claim 9 or 10, Decoding of the fourth step, From the RLC-header PDU, it is determined whether the TB (p) is the first transmission or the number of retransmissions, and the decoding is performed immediately in the case of the first transmission, otherwise after combining with the previously transmitted versions, the decoding is performed. A data receiving method for packet data service in a broadband wireless communication system, characterized by the above-mentioned. The method of claim 11, The receiving end, After storing the received data in the buffer, only the header part can be checked to determine how the data stored in the buffer can be processed, so it is necessary to know the information of the RLC-PDU in advance in order to combine. Packet data service in a broadband wireless communication system, characterized in that the header error can be inspected by separating the payload from the payload. Data reception method. In the transmitting end having a processor, A header (hereinafter referred to as RLC-header PDU) and data including an RLC-PDU (Radio Link Control-Protocol Data Unit, hereinafter RLC-PDU) in the RLC (Radio Link Control, RLC) layer. A first function of separating into payloads (hereinafter referred to as RLC-payload PDUs) comprising a; A second function of configuring the RLC-header PDU and the RLC-payload PDU as one set in the RLC layer and transmitting the MAC to a medium access control (MAC) layer; And A third function of transforming the RLC-header PDU and the RLC-payload PDU into a transport block (TB) that can be transmitted on a transport channel of a physical layer in the MAC layer, and then encoding and transmitting the transport packet to the transport channel A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 13, At the receiving end, A fourth function of demodulating the received RLC-PDU and storing it in a buffer, and then decoding a transport block (hereinafter referred to as TB (h)) corresponding to the RLC- header PDU; A fifth function of checking an error of the TB (h); A sixth function of transmitting the TB (h) to the RLC layer through the MAC layer according to a check result of the fifth function; A seventh function of analyzing the information of the RLC-header PDU in the RLC layer, searching for the number of transmissions of a transport block (hereinafter referred to as TB (p)) corresponding to the RLC-payload PDU, and decoding the same to identify an error; ; And An eighth function according to the analysis result of the seventh function, upon success, removing the corresponding TB (p) from the buffer, maintaining the data stored in the buffer and requesting retransmission to the next version upon failure; A computer-readable recording medium that records a program for further realization. In the receiving end having a processor, After demodulating and storing the received RLC-PDU (hereinafter referred to as RLC-PDU) in a buffer, a header including information of the RLC-PDU (hereinafter referred to as RLC- header PDU) A first function of decoding a transport block corresponding to (hereinafter, referred to as TB (h)); A second function of checking an error of the TB (h); A third function of transmitting the TB (h) to a Radio Link Control (RLC) layer through a MAC (Medium Access Control) layer according to a test result of the second function; A transport block (hereinafter referred to as TB (p)) corresponding to a payload (hereinafter referred to as RLC-payload PDU) including data in the RLC-PDU by analyzing the information of the RLC-header PDU in the RLC layer. A fourth function of checking an error number of times of transmission and decoding the same to identify an error; And A fifth function according to the analysis result of the fourth function, upon success, removing the TB (p) from the buffer, maintaining the data stored in the buffer and requesting retransmission to the next version upon failure; A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 15, A sixth request for retransmission of the RLC-header PDU and the RLC-payload PDU when the error occurs, the TB (h) and the TB (p) are deleted from the buffer when an error occurs; function A computer-readable recording medium that records a program for further realization.

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