KR101411079B1 - Method and apparatus for transmitting and receiving data in mobile communication system - Google Patents

Abstract

The present invention relates to a method and an apparatus for transmitting data in a mobile communication system. When transmitting a data sequence interleaved in parallel by applying importance to a modulation symbol, a sub-block composed only of S bits or a S bit occupying a majority of the sequences is allocated to a bit position having a high reliability, A sub-block occupying a majority of P bits is allocated to a bit position with low reliability and is transmitted.

Interleaver, CDMA, EGPRS, systematic bits, parity bits

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for transmitting and receiving data in a mobile communication system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission method and apparatus in a mobile communication system, and more particularly, to a data transmission apparatus and method in a mobile communication system employing parallel interleaving in a mobile communication system.

As the mobile communication system rapidly develops, it is required to develop a technology capable of transmitting large capacity data close to the capacity of a wired network in a wireless network. As a high-speed and high-capacity communication system capable of processing and transmitting various information such as video and wireless data is required beyond the voice-oriented service, it is necessary to improve the system transmission efficiency by using an appropriate channel coding method As a result. However, due to the characteristics of the system, the mobile communication system inevitably generates an error due to noise, interference, and fading depending on the channel condition when transmitting data, The loss of the information data due to the loss occurs.

In order to reduce the loss of information data due to the occurrence of such an error, the reliability of the mobile communication system can be improved by using various error-control schemes according to the characteristics of the channel. Among the above error control techniques, error control techniques most commonly used are techniques using error-correcting codes. Representative channel codes of the error correction code include turbo codes and convolutional codes.

The turbo code is known to have a superior performance gain in high-speed data transmission compared to a convolutional code that has been mainly used for error correction in the prior art, and can improve the reliability of data transmission by effectively correcting errors due to noise occurring in a transmission channel .

1 is a block diagram of a transmitter of a mobile communication system to which general parallel interleaving is applied.

The channel encoding unit 110 performs channel encoding on the input data and outputs the encoded data. The output of the channel coding unit 110 can be divided into systematic bits (hereinafter referred to as S bits) and parity bits (hereinafter referred to as P bits) according to a technique of an encoder used have. The encoded S bit and P bit are input to a rate matching unit 120.

The rate matching unit 120 performs rate matching so as to match a data rate through bit puncturing or bit repetition. The S-bit and P-bit for which the rate matching has been performed are input to the distribution unit 130.

The distribution unit 130 distributes the rate-matched S and P bits to the two parallel interleavers 140 and 150 shown in FIG.

The first interleaver 140 and the second interleaver 150 interleave the divided S bits and P bits and output the interleaved S bits and the P bits to the parallel-to-serial converter 160. In general, the interleaver will prevent burst errors from occurring by subjecting adjacent symbols or bits to irregular channel fading effects.

The P / S converter 160 converts the two interleaved data bits into a serial form and outputs the serial data to the M-ary modulation (M-ary) modulator 170.

The M-ary modulation unit 170 symbol-mutes the interleaved coded bits according to a modulation scheme such as 8PSK (Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 32QAM or 64QAM.

As shown in FIG. 1, a method for improving the performance by separating S bits and P bits from the information output from the channel encoding unit 110 and performing symbol mapping in consideration of the priority of the S bits and P bits, (Symbol Mapping based on Priority) technology.

In the SMP technique, the first interleaver 140 performs interleaving for the S bits among the two interleavers connected in parallel, the second interleaver 150 performs interleaving for the P bits, The modulation unit 170 maps the symbols according to the coding rate and the reliability pattern of the higher order modulation scheme. When SMP is applied to a data block to be transmitted, the number of bits that can be considered as a highly reliable bit depends on the reliability pattern of the modulation scheme to be used (for example, [HHLL] for 16QAM and [HHMMLL] for 64QAM) .

In applying the SMP technique, a bit of high importance (e.g., S bit) is assigned to a bit position H of high reliability, and a bit of low importance (e.g., P bit) is assigned to a bit position L of low reliability. However, a higher order modulation symbol such as 32QAM, 64QAM, and 128QAM has a bit position M whose reliability is intermediate between H and L. [

Therefore, in the case of a system supporting various coding rates and data rates, when a bit (or sequence) block encoded through the channel coding unit 110 is divided and transmitted by an interleaver, it is classified into S bits and P bits The following problems exist.

For example, when the data rate d is 0.37, 0.55, 0.65, 0.74, 0.88, 0.95, 1.0, or the like, the channel coding unit 110 performs rate matching on the data rate If the data rate d is 1.0, only the S bits remain in the data block after rate matching, and all of the P bits are punctured, leaving none. Then, there is no data to be input to the second interleaver (i. E., The interleaver for P) 150.

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When the data rate d is 0.95, the S bit and the P bit occupy 95% and 5%, respectively, in the data block after the rate matching, thereby causing unbalanced parallel interleaving. This eliminates the effect of parallel interleaving.

Therefore, there is a need for a method and apparatus for efficiently partitioning rate-matched data using a bit reliability pattern according to a higher order modulation scheme.

SUMMARY OF THE INVENTION The present invention provides a data transmitting and receiving apparatus and method in a mobile communication system for dividing (or distributing) a channel-encoded data sequence into subblocks in a transmitter using a parallel interleaver structure for improving performance in a mobile communication system will be.

In addition, when a data sequence interleaved in parallel is transmitted by applying importance to a modulation symbol, a sub-block composed only of S bits or occupying a majority of S bits is allocated to a bit position having a high reliability , And a method and an apparatus for transmitting / receiving data in a mobile communication system in which subblocks composed only of P bits or occupying a majority of P bits are allocated to low-reliability bit positions and transmitted.

According to an embodiment of the present invention, there is provided a method of transmitting data in a mobile communication system, the method comprising the steps of: channel coding data to be transmitted; rate-matching and outputting the encoded data in a manner suitable for a predetermined data rate; Dividing systematic bits and parity bits constituting data for which rate matching is performed into subblocks A and B, and mapping and transmitting symbol-mapped bits according to a predetermined modulation scheme, And determines the ratio of the systematic bits and the parity bits included in the subblocks A and B according to the modulation scheme.

According to another aspect of the present invention, there is provided a data transmission apparatus of a mobile communication system, including: a channel coding unit for channel coding data to be transmitted; a rate matching unit for rate matching the coded data with a predetermined data rate, A distribution unit for dividing systematic bits and parity bits constituting the rate-matched data into subblocks A and B, and outputting the subblocks as symbols And the distribution unit determines a ratio of the systematic bits and the parity bits included in the subblocks A and B according to the modulation scheme.
According to another embodiment of the present invention, there is provided a data reception method of a mobile communication system, comprising the steps of: redistributing subblocks A and B constituting received data into a systematic bit block and a parity bit block; Converting the systematic bit subblocks and the parity bitblocks into a plurality of systematic bit subblocks and parity bit subblocks respectively; And a ratio of the systematic bits and the parity bits included in the subblocks A and B is determined according to the modulation scheme used in the transmitter.
According to another aspect of the present invention, there is provided a data receiving apparatus of a mobile communication system, comprising: a redistributing unit for redistributing subblocks A and B constituting received data into systematic bit blocks and parity bit blocks; A serial-to-parallel converter for converting a systematic bit block and a parity bit block into a plurality of systematic bit subblocks and parity bit subblocks, respectively, and a systematic bit subblock and a parity bit subblock, And a ratio of the systematic bits and the parity bits included in the subblocks A and B is determined according to a modulation scheme used in the transmitter.

Effects obtained by representative ones of the inventions disclosed below will be briefly described as follows.

In order to improve system performance, a transmission apparatus of a mobile communication system using a parallel interleaver structure efficiently divides a channel-encoded data sequence into subblocks, performs symbol mapping such as SMP, and transmits data to the interleaver (Particularly, when d is large, that is, when d is close to 1.0), the system performance is improved.

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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an operation principle of an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The present invention provides a method for dividing S bits and P bits into sub-blocks in a distribution unit 130 in the transmitter 100 shown in FIG. 1 for improving system performance.

As shown in FIG. 1, a channel-encoded data sequence in the channel coding unit 110 is divided into S systematic bits and P bits, which are parity bits. In the present invention, when the S bit and the P bit are divided into sub-blocks in the distribution unit 130, the bit reliability of the higher-order modulation scheme and the higher-order modulation symbol is reflected.

FIG. 2 is a diagram illustrating an example of a bit reliability pattern for an M-array modulation symbol.

2, a higher-order M-array modulation (M > 7) symbol is classified into a high reliability bit position (hereinafter referred to as "H" Medium reliable bit position (hereinafter referred to as "M") and a low-reliability bit position (hereinafter referred to as "L"). However, it can be easily seen that another type of bit reliability pattern exists according to the gray symbol pattern used in the modulation scheme scheme and the I / Q (In-phase / Quadrature) bit allocation scheme used in symbol transmission.

Referring to FIG. 2, the bit reliability bit for the modulation symbol is as follows.

In applying the SMP technique to symbol mapping, a bit of high importance (e.g., S bit) is allocated to a bit position H of high reliability, and a bit of low importance (e.g., P bit) ) To transmit the symbol. However, a higher order modulation symbol such as 32QAM / 64QAM / 128QAM has a bit position M with intermediate reliability. In other words, the bit error probability of the bit corresponding to M corresponds to the bit error probability for H and the average bit error probability for L. Therefore, the bit position M having a medium reliability can be mapped to H or L according to the situation. For example, when there are more S bits in the data block to be transmitted than the P bits, M may be allocated as H to perform symbol mapping. On the other hand, when the number of P bits is larger than the number of S bits in the data block, symbol mapping can be performed by allocating M to L. [

In the present invention, a data block composed of S bits and P bits is generated and coded by rate matching in consideration of the number of bits occupied by H, M, and L included in each symbol, is divided into two sub-blocks in the distribution unit 130 Can be divided. Assuming that two data subblocks are A and B, the subblock bit number division ratio (A: B) for each higher order modulation scheme can be summarized as shown in Table 1 below.

 FIG. 3A illustrates a method of classifying a channel-encoded data sequence A and B according to an embodiment of the present invention.

For example, it is assumed that a turbo code having a coding rate r of 1/3 is used as the channel coding unit 110 and a transmission rate d is 0.5. The encoded data sequence consists of S bits and P bits. The coded data sequence is generated as a data block having a bit number corresponding to the data rate according to an operation such as repetition or puncturing on the coded bits through rate matching and is transmitted to the distribution unit 330 .

The distribution unit 330 divides the input data block into two sub-blocks A and B. [ The ratio of the S bits to the P bits included in the subblocks A and B can be determined according to the reliability pattern for the higher order modulation symbols as illustrated in Table 1 above. As shown in FIG. 3A, the dividing unit 330 divides subblocks so that S bits are included in subblock A and P bits are included in subblock B. FIG. However, depending on the division ratio, some bits of sub-block A may include P bits, and for the same reason, S bits may also be included in sub-block B. The ratio of the S bits to the P bits included in the two subblocks A and B is selected according to the modulation scheme used. That is, the ratio of S bits to P bits in the sub-block is 2: 1 when 8PSK is used for data transmission, 1: 1 when using 16QAM, 3: 2 or 2: 3 when using 32QAM, 2: 1, 1: 2 or 1: 1, and in case of 128QAM, 4: 3 or 2: 5 can be selected.

FIG. 3B is a diagram illustrating an interleaver for performing parallel interleaving on divided subblocks according to an embodiment of the present invention. Referring to FIG.

The subblocks A and B divided through the distributor 330 are input to the first interleaver 340 and the second interleaver 350, respectively, and interleaved. The subblocks A 'and B' having interleaved parallel structures are symbol-mapped using the SMP method and then transmitted through the M-array modulator. At this time, the bits included in the sub-block A 'are inserted in the bit positions with high reliability because all or most of the bits are S bits, and since all or most of the bits included in the sub-block B' Is inserted at a low bit position.

Meanwhile, the interleaver may be omitted depending on the mobile communication system. For example, in the case of a transmission system in which independent interleaving is performed in the rate matching process and no additional external interleaver is required, symbol mapping can be performed using sub-blocks A and B using a scheme such as SMP.

Also, in terms of system performance improvement, the interleaver used in the two-way parallel interleaver should be designed so that the transmitted data bits are efficiently distributed. That is, bursts, bits within the same burst, and bits within the same symbol must be efficiently distributed.

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

First, the channel encoding unit 110 channel-encodes the data to be transmitted in step 401 and outputs the encoded S bit and P bit to the rate matching unit 120.

In step 403, the rate matching unit 120 or 320 generates a data block having a bit number matching the data rate by rate matching the encoded S bit and P bit to fit the data rate through puncturing or repetition, 130, and 330, respectively.

The distribution units 130 and 330 divide the rate-matched S bit and the P bit into subblocks in step 405, and output the subblocks to the respective interleavers 140/340 and 150/350. At this time, the ratio of the number of bits included in the subblocks A and B is selected according to the modulation scheme used.

The first interleaver 140/340 and the second interleaver 150/350 interleave data divided into sub-blocks in step 407 and output the interleaved data to the M-array modulator 170.

In step 409, the M-ary modulation unit 170 performs symbol mapping according to a predetermined modulation scheme.

In the above embodiment, only one RLC (Radio Link Control) data block is considered to be transmitted. However, in the mobile communication system, a plurality of RLC data blocks are independently channel-coded, all data are interleaved, Bursts. For example, in the Modulation Coding Scheme (MCS) -7, the MCS-8 and the MCS-9 of Enhanced General Packet Radio Service (EGPRS), two RLC data blocks are allocated to one payload ). Also, in EGPRS evolution, up to four RLC data blocks may constitute the payload of one radio block. In this case, the transmitter structure shown in FIG. 1 can be generalized as a case where N RLC blocks form a payload as shown in FIG.

That is, the N RLC data blocks are transmitted through the channel encoding units 510 and 511 and the rate matching units 520 and 521 to the systematic bit subblocks S ₁ , S ₂ , ..., S _N and the parity bit subblocks P ₁ , P ₂ , ..., P _N ). The subblocks are divided into subblocks A ₁ , A ₂ , ..., A _N and subblocks B ₁ , B ₂ , ..., B _N according to the above-described method in the distributor 530, 531. In the P / S converter 540, each sub-block is divided into two data blocks A = [A ₁ , A ₂ , ... , A _N ] and B = [B ₁ , B ₂ , ... , B _N ], and then inputs them to the first interleaver 550 and the second interleaver 551, respectively. The interleaved data A 'and B' are sent to the M-array modulator 570 through a serial / parallel converter 560 and then through a series of processes such as burst mapping.

Meanwhile, EGPRS supports FANR (Fast Ack / Nack Reporting) function for the reduced latency (RL) in GERAN (GSM EDGE Radio Access Network) Release 7 (RL-EPGRS Quot;). A terminal supporting the RL function identifies PAN (Piggy-backed Ack / Nack) report data using a PAN indicator field in a header part. The PAN report data is transmitted along with the next payload data after independent channel coding.

Therefore, when PAN report data is used, the puncturing should be performed considering the space occupied by the PAN report data when puncturing the channel-encoded payload data to match the data rate in the rate matching unit. That is, the number of output bits of the rate matching unit is expressed by Equation 1 below.

Number of output bits of the rate matching unit = (number of data bits to be transmitted - number of PAN bits)

Further, the distributing unit must divide the S bit data and the P bit data, which are the outputs of the rate matching unit, into subblocks A and B in consideration of the PAN report data according to the embodiment of the present invention. That is, the PAN report data can be included in the subblock A or included in the subblock B. Since the PAN report data is more important than the user data as the control signal, it is preferable to insert the data into the subblock A.

FIGS. 7A and 7B illustrate a method of dividing a single RLC data block into subblocks A and B in consideration of PAN report data in a partial distribution when one RLC data block is transmitted as user data (payload). FIG. 7A shows a case in which the PAN report data is considered as data with a high degree of importance, and FIG. 7B corresponds to a case in which it is considered as relatively less important data.

Even when two or more RLC data blocks constitute user data, the sub-block dividing method shown in FIGS. 7A and 7B is applied to each of the distributing sections 730 and 731. FIG. However, only the number of bits of the PAN report data as much as the total number of PAN bits divided by the number of RLC data blocks is considered in each of the rate-meching units 720 and 721 and the distributing units 730 and 731. [ That is, for the N RLC data blocks, the number of bits of the PAN report data to be considered in the i-th RLC data block (i = 1, 2, ... N) satisfies the following equation (2).

Number of i-th PAN report data bits = (total number of PAN report data bits / N)

The PAN report data is channel coded separately from the user data. The PAN report data is attached to the user data and is then transmitted after symbol mapping. The timing of attaching the PAN report data to the user data may be before (in parallel) interleaving or after performing interleaving in FIG. 3B or FIG.

8A shows a method of attaching PAN report data before performing interleaving. FIG. 8A corresponds to a case where one RLC data block constitutes a payload, and the PAN report data is inserted in a postamble or preamble form of the subblock A and interleaved together with the subblock A. FIG. It may also be interleaved with the subblock B in the form of a postamble or preamble of subblock B, as the case may be.

8B shows an embodiment in which PAN report data is appended when N RLC data blocks constitute a payload, FIG. 8C illustrates interleaving of user data A and B and then interleaved PAN report data . In this case, independent interleaving is also applied to the channel-coded PAN report data, and the interleaved PAN report data is attached to the interleaved sub-block A 'or B' in the form of a post-amble or a preamble.

9 illustrates a structure of another transmitter to which parallel interleaving is applied to a plurality of RLC data blocks according to an embodiment of the present invention.

In FIG. 9, unlike the transmitter of FIG. 5, it is located at the rear end of the interleaver through a distributor. In other words, the systematic bit subblocks S ₁ , S ₂ , ..., S _N and the parity bit subblocks P ₁ , P ₂ through the channel coding units 910, 911 and the rate matching units 920, , ..., perform the parallel / serial converter 930 with respect to P _N) and, seen from the interleaver (940,941), s-bit sub-blocks and the P-bit sub-blocks one after the distributor 950 performs the interleaving, each with respect to the in Divides the two interleaved data blocks S 'and P' into data blocks A and B according to a distribution scheme according to an embodiment of the invention. Therefore, when N RLC data blocks are transmitted, the transmitter shown in FIG. 5 requires N distributors, while the transmitter shown in FIG. 9 requires only one distributor.

In addition, in FIG. 9, two interleavers 940 and 941 are provided to completely and independently interleave S and P bits, and then S 'and P' interleaved through the distributor 950 are divided into two data blocks A And B, it is advantageous in improving the performance in decoding turbo codes.

FIG. 10 shows a receiver structure corresponding to the transmitter of FIG. 5;

10, the received data bursts are subjected to signal processing such as equalization and demodulation in the signal processing unit 1010, respectively, and then separated into data blocks A 'and B' by the P / S converter 1020 . The two data blocks A 'and B' are deinterleaved in the first and second deinterleavers 1030 and 1031, respectively, and then output as data blocks A and B, respectively. The redistributing unit 1040 redistributes the inversely interleaved data blocks A and B to the systematic bit block S and the parity bit block P, and outputs the redistributed data blocks. The serial / parallel converter 1050-bit block S and the P, respectively systematic systematic bit sub-block _{(S 1, S 2, ...} , S N) and the parity-bit sub-block _{(P 1, P 2, ...} , P N ), And stores S-bit sub-blocks and P-bit sub-blocks in N buffers 1060 and 1061, respectively. Data stored in the buffers 1060 and 1061 are decoded into N RLC data blocks through the N channel decoders 1070 and 1071. [ Even when the PAN report data is applied, the same processing can be performed as described above.

11 shows a receiver structure corresponding to the transmitter shown in Fig.

11 is the same as the structure of the receiver shown in FIG. 10 except that the positions of the redistributing unit 1130 and the de-interleavers 1140 and 1141 are reversed.

That is, the received data bursts are subjected to signal processing such as equalization and demodulation in the signal processing unit 1110, and then separated into data blocks A 'and B' by the P / S converter 1120, respectively. The two data blocks A 'and B' are redistributed to the systematic bit block S 'and the parity bit block P' via the redistribution block 1130 and the bit blocks S 'and P' ) And the second de-interleaver 1131, respectively. The S / P converter 1150 converts the deinterleaved bit blocks S and P into systematic bit subblocks S ₁ , S ₂ , ..., S _N and parity bit subblocks P ₁ , P ₂ , ..., P _N ), and stores S bit subblocks and P bit subblocks in N buffers 1160 and 1161, respectively. The data stored in the buffers 1160 and 1161 are decoded into N RLC data blocks through the N channel decoders 1170 and 1171. [ Even when the PAN report data is applied, the same processing can be performed as described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

1 is a block diagram of a transmitter of a mobile communication system to which general parallel interleaving is applied

2 is a diagram illustrating an example of a bit reliability pattern for an M-ary modulation symbol;

3A is a diagram illustrating an example of dividing a sub-block sequence in a mobile communication system according to an embodiment of the present invention

3B is a diagram illustrating an interleaver for performing parallel interleaving in subblocks divided in a mobile communication system according to an embodiment of the present invention.

4 is a flowchart illustrating a sub-block sequence division method in a mobile communication system according to an embodiment of the present invention.

5 is a diagram illustrating a transmitter structure in which parallel interleaving is applied to a plurality of RLC data blocks

FIG. 6 is a diagram showing the results of performing the respective distributing units for the N RLC data blocks in the stationary / serial converting unit

7A is a diagram illustrating a method of dividing PAN data in consideration of a bit space occupied by PAN data in sub-block A, considering PAN data as data of high importance in a distributor

7B illustrates a method of dividing PAN data in consideration of a bit space occupied by PAN data in subblock B by considering PAN data as low importance data in a distributor

8A is a diagram showing an embodiment in which PAN data is attached as a postamble or a preamble of subblocks A or B

8B is a diagram illustrating an embodiment in which PAN data is attached to N RLC data blocks as a postamble or a preamble of subblock A or B

8C is a diagram showing an embodiment of a case where PAN data is attached to the subblock A 'or B'

9 shows another transmitter structure employing parallel interleaving for multiple RLC data blocks

10 shows a receiver structure corresponding to the transmitter of Fig.

11 shows a receiver structure corresponding to the transmitter of Fig. 9

Claims (22)

A method for transmitting data in a mobile communication system, Channel encoding the data to be transmitted, Rate-matching and outputting the encoded data so as to match a preset data rate; The systematic bits and the parity bits constituting the rate-matched data are divided into sub-blocks A and B according to a predetermined modulation scheme, and the sub-blocks A and B And mapping and transmitting symbols according to the predetermined modulation scheme, The number of bits of the systematic bits included in each of the subblocks A and B is different from the number of bits of the parity bits according to the ratio. The method according to claim 1, Wherein the dividing step comprises: The ratio of the number of bits constituting the subblock A and the subblock B is set to 2: 1 if the modulation scheme is 8PSK (Phase Shift Keying), 1: 1 if 16QAM (Quadrature Amplitude Modulation) 2: 1 or 1: 2 or 1: 1 in case of 2: 3, 64QAM, or 4: 3 or 2: 5 or 3: 4 in case of 128QAM. The method according to claim 1, The sub-block A includes more systematic bits than the parity bit, and the sub-block B includes more parity bits than the systematic bits. The method according to claim 1, And interleaving the divided sub-blocks A and B, respectively. The method according to claim 1, Further comprising interleaving the rate-matched systematic bits and the parity bits before the dividing step. The method according to claim 1, Block P (Piggy-backed Ack / Nack) report data to the sub-block A or the sub-block B, And dividing the systematic bits and the parity bits into the sub-block A and the sub-block B in consideration of the number of bits of the PAN report data. A data transmitting apparatus of a mobile communication system, A channel encoding unit for channel encoding the data to be transmitted, A rate matching unit for rate matching and outputting the encoded data so as to match a predetermined data transmission rate, A distribution unit for dividing systematic bits and parity bits constituting the rate-matched data into sub-blocks A and B according to a predetermined modulation scheme; And a modulator for mapping and transmitting the divided subblocks A and B according to the predetermined modulation scheme, Wherein the distributor comprises: And determines the number of bits of the systematic bit and the parity bit included in each of the subblock A and the subblock B according to the ratio. 8. The method of claim 7, Wherein the distributor comprises: The ratio of the number of bits constituting the subblock A and the subblock B is set to 2: 1 if the modulation scheme is 8PSK (Phase Shift Keying), 1: 1 if 16QAM (Quadrature Amplitude Modulation) 2: 1 or 1: 2 or 1: 1 for 2: 3, 64QAM, or 4: 3 or 2: 5 or 3: 4 for 128QAM. 8. The method of claim 7, The subblock A includes more systematic bits than the parity bit, and the subblock B includes more parity bits than systematic bits. 8. The method of claim 7, Further comprising a first interleaver and a second interleaver interleaving the divided subblocks A and B, respectively, and outputting the interleaved subblocks A and B to the modulator. 8. The method of claim 7, Further comprising a first interleaver and a second interleaver interleaving the rate-matched systematic bits and the parity bits, respectively, and outputting the interleaved bits to the distribution unit. 8. The method of claim 7, The channel coding unit encodes the PAN (Piggy-backed Ack / Nack) report data separately from the data to be transmitted, The distributing unit inserts the encoded PAN report data into the subblock A or the subblock B and considers the systematic bits and the parity bits in the subblock A and the subblock B in consideration of the number of bits of the PAN report data, And sub-block B. A method of receiving data in a mobile communication system, A step of redistributing subblocks A and B constituting received data into a systematic bit block and a parity bit block, Converting the systematic bit block and the parity bit block into a plurality of systematic bit sub-blocks and parity bit sub-blocks, respectively; And channel decoding the systematic bit subblocks and the parity bit subblocks one by one, The ratio of the sub-block A to the sub-block B is determined according to the modulation scheme used in the transmitter, and the number of bits of the systematic bits and the parity bits included in each of the sub- A method of receiving data determined by a ratio. 14. The method of claim 13, The ratio of the number of bits constituting the subblock A and the subblock B is 2: 1 if the modulation scheme is 8PSK (Phase Shift Keying), 1: 1 if 16QAM (Quadrature Amplitude Modulation) 2: 3 or 64: 2, 2: 1 or 1: 2 or 1: 1 for 128QAM, 4: 3 or 2: 5 or 3: 4 for 128QAM. 14. The method of claim 13, The subblock A includes more systematic bits than the parity bits, and the subblock B includes more parity bits than systematic bits. 14. The method of claim 13, And deinterleaving the redistributed systematic bit block and the parity bit block, respectively. 14. The method of claim 13, Further comprising the step of de-interleaving the subblock A and the subblock B before the redistributing step. A data receiving apparatus of a mobile communication system, A redistributing unit for redistributing the subblocks A and B constituting the received data into a systematic bit block and a parity bit block, A serial-to-parallel converter for converting the systematic bit block and the parity bit block into a plurality of systematic bit sub-blocks and parity bit sub- And a decoder for channel decoding the systematic bit subblocks and the parity bit subblocks one by one, The ratio of the sub-block A to the sub-block B is determined according to the modulation scheme used in the transmitter, and the number of bits of the systematic bits and the parity bits included in each of the sub- The data receiving device is determined according to a ratio. 19. The method of claim 18, The ratio of the number of bits constituting the subblock A and the subblock B is 2: 1 if the modulation scheme is 8PSK (Phase Shift Keying), 1: 1 if 16QAM (Quadrature Amplitude Modulation) 2: 1 or 1: 2 or 1: 1 for 2: 3, 64QAM, 4: 3 or 2: 5 or 3: 4 for 128QAM. 19. The method of claim 18, The subblock A includes more systematic bits than the parity bits, and the subblock B includes more parity bits than systematic bits. 19. The method of claim 18, Further comprising a first de-interleaver and a second de-interleaver for de-interleaving the redistributed systematic bit block and the parity bit block, respectively, and outputting the de-interleaved systematic bit block and the parity bit block to the deserialization unit. 19. The method of claim 18, Further comprising a first de-interleaver and a second de-interleaver for de-interleaving the sub-block A and the sub-block B and outputting the deinterleaved data to the redistributing unit.

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