JP2002078024A - Data transmitter, data receiver, data transmission method and data reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data transmitter, a data receiver, a data transmission method and a data reception method by which rate matching processing is always applied to a bit length of a prescribed size thereby preventing the processing quantity from being increased even when number of transport blocks sent through a transport channel and a transport block size are changed. SOLUTION: A CRC attach section 101 through a convolution coding section 103 apply coding processing to transport channel data (TrCH data) for error correction. A DTX(Discontinuous Transmission) bit insertion section 104 inserts DTX bits to fill in a bit number of a difference to the TrCH data when the number of the TrCH data after coding processing has the difference, that is, is less than a predetermined maximum value. A rate matching section 105 decides number of bits for mapping the TrCH data after the insertion with data on a physical channel having a spread rate designated by a host layer. A physical channel mapping section 111 maps the TrCH data of the bit number with the data on the physical channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a CDMA (Code D)
Mobile station apparatus such as a mobile phone, a mobile phone, an information communication terminal apparatus having a mobile phone function and a computer function in a mobile communication system to which the ivision Multiple Access (ivision Multiple Access) method is applied, and a base station for performing wireless communication with the mobile station apparatus The present invention relates to a data transmission device, a data reception device, a data transmission method, and a data reception method applied to a device or the like.

[0002]

2. Description of the Related Art A channel coding method in a third generation mobile communication system uses 3GPP TS25.21.
2 is known. For downlink channel coding, multiple transport channels
(Hereinafter referred to as TrCH) A technique called fixed position that fixes the position when multiplexing, and fl that makes the position variable
The technique called exible position is known.

[0003] In a mobile station apparatus that receives downlink signals from a base station apparatus, there is no explicit information about the combination of a plurality of received TrCHs and the format of each TrCH (such as the size of a transport block and the number of multiplexed transport blocks). Blind Transport format detection
In order to perform (hereinafter referred to as BTFD), the reception processing can be facilitated by applying the fixed position.

FIG. 5 is a block diagram showing a configuration of a conventional data transmission device.

[0005] The data transmitting apparatus shown in FIG.
This is to perform downlink channel coding processing in the case of position. However, in the following description, a case where a convolutional coding process with a coding rate of 1/3 is applied as an error correction coding process is shown. The same applies to the case where the Turbo encoding processing at a rate of 1/3 is applied.

In this data transmission device, the first to n-th Tr
For each of the CH data, the first to n-th Trs having the same configuration
In each of the CH processing units 500-1 to 500-n, C
RC adding section 501, TB (Transport block) combining section 50
2, convolutional encoding section 503, rate matching section 504,
DTX bit insertion section 505, first interleaving section 5
06 and the radio frame division unit 507 perform processing described later. After that, the TrCH multiplexing unit 508
H multiplexing is performed, and a physical data dividing unit 509, a second interleaving unit 510, and a physical channel mapping unit 511 perform processing described below as a single data string.

First, the first to n-th TrCH processing units 500-
1 to 500-n is performed by the first TrCH processing unit 500-n.
1 will be described.

The CRC adding section 501 adds CRC bits to each TB in the TrCH data.

[0009] In TB combining section 502, CRC adding section 50
The TB to which the CRC bit is added by 1 is combined into a single data string.

[0010] In the convolutional encoding section 503, the TB combining section 50
After adding tail bits of 8 bits to the data string from 2, a convolutional encoding process at an encoding rate of 1/3 is performed.

[0011] The rate matching section 504 determines the number of bits for mapping the TrCH data sequence to the physical channel having the spreading factor specified by the upper layer, based on the RM (Rate matching attribute) specified by the upper layer.

[0012] The determined number of bits is used in mapping in physical channel mapping section 511. The rate matching algorithm shall follow the one described in TS25.212.

The amount of change in the number of bits before and after the rate matching is determined on the basis of the case where the amount of transmission data per interleave cycle {TTI (Transmission Time Interval)} becomes maximum in TrCH data. The data amount R (N) after rate matching with the transmission data amount N ^TTI _i per data TTI
^TTI _i ) outputs the number of bits such that R (N ^TTI _i ) / N ^TTI _i = C _i .

In the DTX bit insertion unit 505, TrCH
If the number of bits after rate matching of data is less than the maximum value, the number of bits of the difference is set to DTX (Di
(scontinuous transmission) bit.

In the first interleaving section 506, DT
For the TrCH data from the X bit insertion unit 505,
Perform block interleaving over a plurality of radio frames.

In the radio frame division unit 507, each 10 m
s is divided into data strings to be transmitted in the wireless frame of s.

As described above, the first to n-th TrCH processing units 50
Each TrCH data processed in 0-1 to 500-n is
Output to TrCH multiplexing section 508.

In the TrCH multiplexing unit 508, each TrCH
Performs data multiplexing.

The physical channel division unit 509 divides transmission data into each code when performing multi-code transmission on multiplexed data.

In second interleaving section 510, the output data from physical channel division section 509 is
Perform block interleaving in data transmitted within ms.

In the physical channel mapping section 511, the data sequence from the second interleaving section 510 is arranged on the physical channel according to the number of bits.

Here, the convolutional encoder 503 for processing the i-th TrCH data, the rate matching unit 504, and the DT
FIG. 6 shows a data flow in the X-bit insertion unit 505, and its description will be made.

FIG. 6 (a) shows the number of bits input when TF (Transport Format) = j determined by the size of the TB, the number of multiplexed TBs, etc. in the convolutional encoding process in the convolutional encoder 503. ), N _{i, j} .

Here, it is assumed that N _{i, j} includes tail bits. At this time, the convolutional encoder 503 outputs (b)
, A bit string of N _{i, j} × 3 is output.

In the rate matching process in the rate matching unit 504, as shown in (c), (N _{i, j} ×
3) Bit operations are performed for each TF such that x = Ci = (Ni _{, j} * 3) + [Delta _] Ni _{, j} .

In the DTX bit insertion unit 505, as shown in (d), N _{i, DTX} = (N _{i, max} × 3) + ΔN _{i, max} −
DTX bits for the number of bits that are (N _{i, j} × 3) + ΔN _{i, j} are inserted.

[0027]

However, in the conventional apparatus, it is necessary to perform a rate matching process of a different pattern for a data string having a different number of bits for each TF of each TrCH. Is increased.

In particular, when BTFD is performed in channel decoding in downlink reception processing,
Since it is necessary to perform the rate dematching processing corresponding to all TFs, the processing amount increases.

The present invention has been made in view of such a point, and even if the number of transport blocks transmitted on the transport channel or the transport block size changes, rate matching is always performed for a bit length of a fixed size. An object of the present invention is to provide a data transmission device, a data reception device, a data transmission method, and a data reception method that can perform processing and can thereby prevent an increase in a processing amount.

[0030]

A data transmitting apparatus according to the present invention comprises: means for performing encoding processing for error correction on a plurality of transport channel data; and bits of the transport channel data after the encoding processing. Means for inserting DTX bits into the transport channel data for filling the number of bits of the difference when the number is less than a predetermined maximum value, and a physical channel having a spreading factor specified by an upper layer, A configuration including means for performing rate matching for determining the number of bits to which the transport channel data after insertion is mapped, and means for mapping the transport channel data according to the number of bits on the physical channel is adopted.

According to this configuration, even if the number of transport blocks transmitted on the transport channel or the transport block size changes, the rate matching process can always be performed on a bit length of a fixed size. This can prevent an increase in the processing amount.

The data transmitting apparatus according to the present invention includes means for performing an encoding process for error correction on the transport channel data, and in each transport channel data after the encoding process, the number of bits of this data is Means for inserting DTX bits for filling the number of bits of the difference into the transport channel data when the value is less than the predetermined maximum value, and based on the weight of each transport channel specified by the upper layer, Means for performing rate matching to determine the number of bits for mapping each of the transport channel data after insertion to a physical channel having a spreading factor specified by the upper layer; and each transport channel output from this means. Means for multiplexing data, and a multiplexed data stream corresponding to the bit number. It adopts a configuration comprising a means for mapping the port channel data on a physical channel.

According to this configuration, even if the number of transport blocks transmitted on the transport channel or the transport block size changes, the rate matching process can always be performed on a bit length of a fixed size. This can prevent an increase in the processing amount.

[0034] The data receiving apparatus of the present invention includes a means for performing rate dematching for returning transport channel data mapped in the data transmitting apparatus having the above configuration to data before rate matching in the data transmitting apparatus; When the number of bits of the transport channel data after the matching is less than a predetermined maximum value, the difference bit number is regarded as a DTX bit and deleted, and the transport channel data output from this means includes: Means for performing a decoding process for error correction.

According to this configuration, even if the number of transport blocks transmitted on the transport channel or the transport block size changes, the rate dematching processing can be always performed for a bit length of a fixed size, This can prevent an increase in the processing amount.

In the data receiving apparatus of the present invention, means for separating the transport channel data mapped in the data transmitting apparatus having the above configuration, and each of the transport channels separated by this means are designated by an upper layer. Based on the weight of each transport channel, means for performing rate dematching to return to data before rate matching in the data transmission device, and the number of bits of each transport channel data after the rate dematching is predetermined. If the difference is less than the maximum value, a means for removing the number of bits of the difference as DTX bits and a means for performing decoding processing for error correction on each transport channel data output from the means are provided. The configuration provided is adopted.

According to this configuration, even if the number of transport blocks or the transport block size transmitted on the transport channel changes, the rate dematching processing can be always performed for a bit length of a fixed size. This can prevent an increase in the processing amount.

The base station apparatus of the present invention employs a configuration including a data transmitting apparatus having the same configuration as any of the above.

According to this configuration, in the base station apparatus,
The same operation and effect as those of the data transmission device having the same configuration as any of the above can be obtained.

The mobile station apparatus of the present invention employs a configuration including a data receiving apparatus having the same configuration as any of the above.

According to this configuration, in the mobile station device,
The same operation and effect as those of the data receiving apparatus having the same configuration as any of the above can be obtained.

According to the data transmission method of the present invention, encoding processing for error correction is performed on a plurality of transport channel data, and the number of bits of the transport channel data after the processing is less than a predetermined maximum value. In this case, DTX bits for filling the number of bits of the difference are inserted into the transport channel data, and the number of bits for mapping the inserted transport channel data to a physical channel having a spreading factor designated by an upper layer is determined. Then, transport channel data corresponding to the number of bits is mapped onto a physical channel.

According to this method, even if the number of transport blocks transmitted on the transport channel or the transport block size changes, the rate matching process can always be performed for a bit length of a fixed size. This can prevent an increase in the processing amount.

The data receiving method of the present invention performs rate dematching for returning the transport channel data mapped in the above data transmission method to data before rate matching in the data transmission method, and performs rate dematching after the rate dematching. If the number of bits of the transport channel data is less than a predetermined maximum value,
The number of bits of the difference is regarded as DTX bits and deleted,
The transport channel data after this deletion process
A decoding process for error correction is performed.

According to this method, even if the number of transport blocks transmitted on the transport channel or the transport block size changes, the rate dematching processing can be always performed for a bit length of a fixed size, This can prevent an increase in the processing amount.

[0046]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG.1 is a block diagram showing a configuration of a data transmitting apparatus according to Embodiment 1 of the present invention.

The data transmitting apparatus shown in FIG.
This is to perform downlink channel coding processing in the case of position. However, in the following description, a case where a convolutional coding process with a coding rate of 1/3 is applied as an error correction coding process is shown. The same applies to the case where the Turbo encoding processing at a rate of 1/3 is applied.

In this data transmission device, the first to n-th Tr
For each of the CH data, the first to n-th Trs having the same configuration
In each of the CH processing units 100-1 to 100-n, C
RC adding section 101, TB combining section 102, convolutional coding section 1
03, the DTX bit insertion unit 104, the rate matching unit 105, the first interleaving unit 106, and the radio frame division unit 107 perform processing described later.

Thereafter, the TrCH multiplexing unit 108
H multiplexing is performed, and the physical channel division unit 109, the second interleaving unit 110, and the physical channel mapping unit 111 perform processing described below as a single data string.

First, the first to n-th TrCH processing units 100-
1 to 100-n are performed by the first TrCH processing unit 100-n.
1 will be described.

The CRC adding section 101 adds CRC bits to each TB in the TrCH data.

In the TB combining section 102, the CRC adding section 10
The TB to which the CRC bit is added by 1 is combined into a single data string.

In the convolutional coding unit 103, the TB combining unit 10
After adding tail bits of 8 bits to the data string from 2, a convolutional encoding process at an encoding rate of 1/3 is performed.

When the number of bits of TrCH data from convolutional coding section 503 is less than the maximum value, DTX bit inserting section 104 converts the number of bits of the difference into DTX bits.
Insert as bits. Therefore, the D of the TrCH data
The number of bits after the TX bit insertion is always equal to the number of bits in the TF at which the TB size × the number of TB is maximized.

The rate matching section 105 determines the number of bits for mapping the TrCH data sequence to the physical channel having the spreading factor specified by the upper layer, based on the RM specified by the upper layer.

The determined number of bits is used for mapping in physical channel mapping section 111. The rate matching algorithm shall follow that described in TS25.212.

The amount of change in the number of bits before and after the rate matching is the same as that in the case where the data sequence corresponding to the maximum number of bits is always input to the TrCH, so that the amount of transmission data per 1st interleave cycle (TTI) becomes maximum. Only the rate matching process is performed.

In first interleaving section 106, the TrCH data from rate matching section 105
Perform block interleaving over a plurality of radio frames.

In the radio frame division unit 107, each 10 m
s is divided into data strings to be transmitted in the wireless frame of s.

As described above, the first to n-th TrCH processing units 10
Each TrCH data processed in 0-1 to 100-n is
Output to TrCH multiplexing section 108.

In the TrCH multiplexing unit 108, each TrCH
Performs data multiplexing.

The physical channel division section 109 divides transmission data into each code when performing multi-code transmission on multiplexed data.

The second interleaving section 110 compares the output data from the physical channel
Perform block interleaving in data transmitted within ms.

The physical channel mapping section 111 arranges the data sequence from the second interleaving section 110 on the physical channel according to the number of bits.

Here, the data flow in the convolutional encoder 103, the DTX bit insertion unit 104, and the rate matching unit 105 for processing the i-th TrCH data will be described with reference to FIG.

For the convolutional encoding process in convolutional encoding section 103, the number of bits input when TF = j determined by the size of the TB, the number of multiplexed TBs, and the like is shown in FIG.
As shown in (a), N _{i, j} is set.

Here, it is assumed that N _{i, j} includes tail bits. At this time, the convolutional encoder 103 outputs (b)
, A bit string of N _{i, j} × 3 is output.

[0069] In DTX bit insertion unit 104, as shown in _{(c), N i, DTX} = (N i, max × 3) - (N i, j ×
DTX bits for the number of bits of 3) are inserted.

In the rate matching unit 105, N _{i, max} × 3 is the number of input bits common to all TFs.
As shown in (d), only the bit operations that make (N _{i, max} × 3) + ΔN _{i, max} are performed.

As described above, according to the data transmitting apparatus of the first embodiment, the multiplexing of the transport channel
In the downlink channel coding performed at the d position, DTX is first performed after encoding processing for error correction.
Bit insertion processing is performed, and then rate matching processing is performed.

As a result, even if the number of transport blocks transmitted on the transport channel or the transport block size changes, the rate matching process can always be performed on a bit length of a fixed size.
This can prevent an increase in the processing amount.

(Embodiment 2) FIG.3 is a block diagram showing a configuration of a data receiving apparatus according to Embodiment 2 of the present invention.

The data receiving apparatus shown in FIG.
The downlink channel decoding method for position is shown. However, in the following description, a case where a convolutional coding process with a coding rate of 1/3 is applied as an error correction coding process is shown. The same applies to the case where the Turbo encoding processing at a rate of 1/3 is applied.

In this data receiving apparatus, each physical channel data transmitted from the data transmitting apparatus of the first embodiment is received, and the physical channel demapping section 301, the second deinterleaving section 302, the physical channel combining section 3
03 and the TrCH separation unit 304 perform processing described below, and the first to n-th TrCH processing units 305-
1 to 305-n.

Then, each TrCH processing unit 305-1
305-n, the radio frame combining unit 306, the first deinterleaving unit 307, the rate dematching unit 308, the DTX bit removing unit 309, and the Viterbi decoding unit 31
0, the TB separation unit 311 and the CRC determination unit 312 perform the processing described below, and output the first to n-th TrCH data.

In the physical channel demapping section 301,
A data string is extracted from each physical channel.

The second deinterleaving section 302 performs block deinterleaving on data output from the physical channel demapping section 301 within data to be transmitted within 10 ms.

The physical channel combining section 303 combines the transmission data block deinterleaved from each code when performing multi-code transmission.

The TrCH separating section 304 separates the data combined by the physical channel combining section 303 into first to n-th TrCs.
The data is separated into H data and output to the corresponding TrCH processing units 305-1 to 305-n.

Next, each of the TrCH processing units 305-1 to 30-30
The operation of 5-n will be described on behalf of the first TrCH processing unit 305-1.

In the radio frame combining unit 306, each 10 m
The data sequence transmitted in the s radio frame is combined with the TTI cycle.

The first deinterleaving section 307 performs block deinterleaving on the combined data from the wireless frame combining section 306 over a plurality of wireless frames.

The rate dematching section 308 converts the block deinterleaved data to the physical channel having the spreading factor specified by the upper layer based on the RM specified by the upper layer, and transmits the rate described in TS25.212 to the physical channel having the spreading factor specified by the upper layer. An operation is performed to return the data sequence of the TrCH mapped according to the matching algorithm to the data sequence before rate matching of the transmission source.

The amount of change in the number of bits before and after the rate dematching is determined by the interleave cycle (T
Only the rate dematching process for the case where the amount of transmission data per TI) is the maximum is performed.

When the number of bits of the TrCH data from the rate dematching section 308 is less than the maximum value, the DTX bit deletion section 309 regards the number of bits of the difference as DTX bits and deletes them.

Here, the number of bits of the TrCH data before the DTX bit is deleted is defined as T size where TB size × the number of TB is maximum.
It is always equal to the number of bits in F.

The Viterbi decoding section 310 performs a Viterbi decoding process (a coding rate of 1/3) on the data string from the DTX bit deletion section 309. At this time, the last 8 bits of the data string are treated as tail bits.

In the TB separation section 311, the Viterbi decoding section 31
The data sequence of TrCH decoded by 0 is separated into TB units.

In the CRC determination section 312, the TB separation section 31
A CRC bit determination process is performed on TB from 1 onward. As a result, the first TrCH data is output.

Here, the rate dematching section 308 for processing the data of the i-th TrCH and the DTX bit deleting section 30
9 and the data flow in the Viterbi decoding unit 310 are shown in FIG.
Will be described below.

In the rate dematching section 308, all TFs
, N _{i, max} × 3 + ΔN shown in FIG.
_{Since i, max} is the number of input bits, only bit manipulations that result in (N _{i, max} × 3) are performed.

In the DTX bit deletion unit 309, as shown in (b), N _{i, DTX} = (N _{i, max} × 3) − (N _{i, j} ×
DTX bits for the number of bits of 3) are deleted.

For the Viterbi decoding process in the Viterbi decoding unit 310, as shown in (c), a data string of N _{i, j} × 3 is input, and as an output after error correction, as shown in (d). Then, a data sequence of _{Ni, j} is obtained (including the tail bit).

As described above, according to the data receiving apparatus of the second embodiment, the DTX bit deletion processing is performed after the rate dematching processing in opposition to the data transmitting apparatus of the first embodiment, and the error correction for error correction is performed. Added decryption processing.

Thus, even if the number of transport blocks or the transport block size transmitted on the transport channel changes, the rate dematching processing can be always performed for a bit length of a fixed size. This can prevent an increase in the processing amount.

In particular, when BTFD using CRC described in Annex A.1.2 of TS 25.212 is executed,
T corresponding to all possible TFs of the TrCH to be determined
Since it is not necessary to perform the rate dematching processing for each transmission bit number in the TI period, the amount of reception processing can be reduced.

[0098]

As described above, according to the present invention,
Even if the number of transport blocks or the transport block size transmitted in the transport channel changes, the rate matching process can always be performed for a bit length of a fixed size, thereby preventing an increase in the processing amount. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a data transmission device according to Embodiment 1 of the present invention.

FIG. 2 is a data flow diagram for explaining an operation of a data transmission process by the data transmission device according to the first embodiment.

FIG. 3 is a block diagram showing a configuration of a data receiving apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a data flow diagram for explaining an operation of a data receiving process by the data receiving apparatus according to the second embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional data transmission device.

FIG. 6 is a data flow diagram for explaining an operation of a data transmission process by a conventional data transmission device.

[Explanation of symbols]

 100-1 to 100-n First to n-th TrCH processing units 101 CRC adding unit 102 TB combining unit 103 Convolutional coding unit 104 DTX bit insertion unit 105 Rate matching unit 106 First interleaving unit 107 Radio frame division unit 108 TrCH Multiplexing section 109 Physical channel division section 110 Second interleaving section 111 Physical channel mapping section 301 Physical channel demapping section 302 Second deinterleaving section 303 Physical channel combining section 304 TrCH separation section 305-1 to 305-n First To n-th TrCH processing unit 306 radio frame combining unit 307 first deinterleaving unit 308 rate dematching unit 309 DTX bit deletion unit 310 Viterbi decoding unit 311 TB separation unit 312 CRC determination unit

Claims (8)

[Claims] And means for performing an encoding process for error correction on a plurality of transport channel data, wherein the number of bits of the transport channel data after the encoding process is less than a predetermined maximum value. Means for inserting DTX bits into the transport channel data for filling the number of bits of the difference, and the number of bits for mapping the transport channel data after the insertion to a physical channel having a spreading factor specified by an upper layer. A data transmission device comprising: means for performing rate matching for determining the number of bits; and means for mapping transport channel data according to the number of bits onto a physical channel. 2. A means for performing encoding processing for error correction on transport channel data, and in each of the transport channel data after the encoding processing, the number of bits of the data is set to a predetermined maximum value. Means for inserting DTX bits into the transport channel data to fill the number of bits of the difference,
Rate matching for determining the number of bits for mapping each of the inserted transport channel data to a physical channel having a spreading factor specified by the upper layer based on the weight of each transport channel specified by the upper layer. Means for multiplexing each of the transport channel data output from this means, and means for mapping the multiplexed transport channel data according to the number of bits on a physical channel. A data transmission device, comprising: 3. A means for performing rate dematching for returning transport channel data mapped in the data transmitting apparatus to data before rate matching in the data transmitting apparatus, and a transformer after the rate dematching. When the number of bits of the port channel data is less than a predetermined maximum value, the means for removing the difference bit number as DTX bits is used, and the transport channel data output from this means is used for error correction. And a means for performing a decoding process. 4. A means for separating the transport channel data mapped in the data transmitting apparatus according to claim 2, and each transport channel separated by said means is assigned to each transport specified by an upper layer. Means for performing rate dematching to return to data before rate matching in the data transmitting apparatus based on the weight of the channel, and the number of bits of each transport channel data after the rate matching is less than a predetermined maximum value. When there is no DTX bit, means for removing the difference bit number as DTX bits and means for performing decoding processing for error correction on each transport channel data output from this means are provided. Characteristic data receiving device. 5. A base station apparatus comprising the data transmission apparatus according to claim 1. 6. A mobile station device comprising the data receiving device according to claim 3 or 4. 7. An encoding process for error correction is performed on a plurality of transport channel data, and when the number of bits of the transport channel data after the process is less than a predetermined maximum value, the difference of the difference is calculated. DTX bits for filling the number of bits are inserted into the transport channel data, and rate matching is performed to determine the number of bits for mapping the inserted transport channel data to a physical channel having a spreading factor specified by an upper layer, A data transmission method characterized by mapping transport channel data according to the number of bits on a physical channel. 8. Rate dematching for returning transport channel data mapped in the data transmission method according to claim 7 to data before rate matching in the data transmission method, and the transport channel after the rate dematching. If the number of data bits is less than a predetermined maximum value, the difference bit number is regarded as DTX bits and deleted, and the transport channel data that has undergone this deletion processing is subjected to decoding processing for error correction. A data receiving method, comprising: