CN110266431B

CN110266431B - Data transmission method and device

Info

Publication number: CN110266431B
Application number: CN201910445556.4A
Authority: CN
Inventors: 南方; 吴强; 范霄安
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-05-11
Filing date: 2012-07-27
Publication date: 2021-10-15
Anticipated expiration: 2032-07-27
Also published as: CN104272838A; CN110266431A; CN104272838B

Abstract

The invention provides a data transmission method and equipment. Selecting a TBS value according to a pre-configured second table, wherein the second table is used for describing a corresponding relation among the TBS value, the number of RBs and a TBS index, the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, a modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet a rate requirement required during transmission time interval TTI binding transmission; and transmitting the data borne by the PUSCH by adopting the bound TTI according to the selected TBS value. The embodiment of the invention can improve the coverage range of the PUSCH when the data rate is high.

Description

Data transmission method and device

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a data transmission method and device.

Background

In order to save cost and facilitate network deployment, operators want Long Term Evolution (LTE) to use the same site as the existing Universal Mobile Telecommunications System (UMTS), and in order to ensure the communication quality of cell edge users, the LTE needs to reach the same coverage as the UMTS. In the LTE, different channels are divided in a physical layer to carry different information, the coverage of each channel of the LTE needs to be evaluated, a channel with limited coverage is identified, and finally a method capable of enhancing the coverage of the channel is considered.

The coverage of each channel of LTE may be evaluated according to a Maximum Connection Loss (MCL) value, and a smaller MCL value indicates a more limited coverage of the corresponding channel. A Physical Uplink Shared Channel (PUSCH) is used for transmitting Uplink data traffic, and when the PUSCH is used for data traffic transmission with a medium rate (hereinafter, referred to as PUSCH medium data rate), an MCL value of the PUSCH is the smallest as compared with an MCL value of another Channel, and coverage is the worst, and the coverage range needs to be improved. The data rate in the PUSCH generally refers to a rate between 128kbps and 384kbps, among others.

In order to improve the coverage, a method of TTI (Transmission Time Interval) bundling may be adopted, and in the prior art, TTI bundling may only be applied in a scenario where the number of Resource Blocks (RBs) is less than or equal to 3 and QPSK (Quadrature Phase Shift Keying) modulation is performed. In this scenario, the maximum value of the Transport Block Size (TBS) is 504 bits. Then, even if the initial transmission is 100% correct, when 4 subframes are bound, the maximum data rate is only 504/4 ms-126 kbps, while the data rate in the PUSCH is usually between 128kbps and 384kbps, and the rate requirement of the data rate in the PUSCH cannot be achieved after TTI binding. That is to say, the existing TTI bundling scheme cannot be directly applied in the PUSCH data rate scenario, and a solution for improving the coverage when considering the PUSCH data rate is required.

Disclosure of Invention

The invention provides a data transmission method and equipment, which are used for improving the coverage range of data rate in a PUSCH.

One aspect of the present invention provides a data transmission method, including:

selecting a Transport Block Size (TBS) value according to a pre-configured second table, wherein the second table is used for describing a corresponding relation among the TBS value, the number of RBs in a Resource Block (RB) and a TBS index, the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, a modulation mode corresponding to the TBS index corresponding to the selected TBS value is Quadrature Phase Shift Keying (QPSK), and the selected TBS value can meet a rate requirement required during Transmission Time Interval (TTI) binding transmission;

and transmitting the data borne by the Physical Uplink Shared Channel (PUSCH) by adopting the bound TTI according to the selected TBS value.

In a possible implementation manner, the transmitting data carried by a PUSCH using a bonded TTT according to the selected TBS value includes:

selecting data borne by a PUSCH, wherein the data borne by the PUSCH comprises all or part of information bits, the size of the information bits is the selected TBS value, when the data borne by the PUSCH is selected, the data is selected within the range of the storage position of the information bits, and all the information bits starting from the selected starting point are continuously selected;

and transmitting the selected data borne by the PUSCH by adopting the bound TTI.

In another possible implementation manner, the selecting the data carried by the PUSCH includes:

and continuously and circularly selecting the data which can be transmitted by the bound TTI.

In another possible implementation manner, the selected starting point is:

the position indicated by RV 0.

In another possible implementation manner, the transmitting the data carried by the PUSCH includes:

at the initial transmission, continuous data selected from the position indicated by the RV0 is transmitted.

In another possible implementation manner, the TBS value, the number of RBs, and the TBS index described in the second table satisfy at least one of the following items:

in the second table, when the number of RBs is less than or equal to the specific value and the modulation mode corresponding to the TBS index is QPSK, the corresponding TBS value is obtained by modifying the same number of RBs and the same TBS value corresponding to the TBS index in the first table, so that the modified TBS value can meet the rate requirement required by TTI binding transmission; or,

in the second table, when the number of RBs is less than or equal to the specific value and the TBS value can meet the rate requirement required for TTI bundling transmission, the corresponding modulation mode of the TBS index is obtained by modifying the modulation mode corresponding to the TBS index corresponding to the same number of RBs and the same TBS value in the first table, so that the modified modulation mode is QPSK; or,

in the second table, when the modulation mode corresponding to the TBS index is QPSK and the TBS value can satisfy the rate requirement required for TTI bundling transmission, the corresponding number of RBs is greater than the maximum value of the number of RBs that can be selected in the first table for TTI bundling transmission;

the first table is an existing table for describing a corresponding relationship among the TBS value, the number of RBs, and the TBS index.

In another possible implementation, the selected TBS value is any value within the range [568, 2152] that is already contained in the first table.

In another possible implementation, the specific value is 8.

determining the number of data which can be transmitted by the bound TTI, and determining the sequence length after rate matching according to the number of the data which can be transmitted by the bound TTI;

determining the initial position of data selection according to the unique redundancy version number;

continuously and circularly selecting data with the length of the sequence length after rate matching from the initial position of data selection in the buffer for buffering the data stream after subblock interleaving to obtain the data after rate matching of each code block, wherein the data stream after subblock interleaving is the data stream obtained after CRC addition, code block segmentation and code block CRC addition of the information bits and subblock interleaving of the coded stream;

the data carried by the PUSCH and selected by adopting the bound TTI transmission comprises the following steps:

code block concatenation is carried out on the data after each code block rate matching;

and modulating the data after code block concatenation, and transmitting the symbols obtained after modulation in each TTI in the bound TTIs respectively.

In another possible implementation manner, during initial transmission, the unique redundancy version number is 0; or, at retransmission, the unique redundancy version number is 0, 1, 2 or 3.

In another possible implementation manner, the determining the number of data that can be transmitted by the bundled TTI includes: determining the number of data which can be transmitted by the bound TTI according to H-G multiplied by N; wherein,

h is the number of data which can be transmitted by the bound TTI;

g is the total available data number for the transmission of one transport block in one TTI;

n is the number of bonded TTIs.

In another possible implementation manner, the determining the sequence length after rate matching according to the number of data that can be transmitted in the bundled TTI includes: determining the length of the sequence after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

r is the code block sequence number; c is the number of code blocks obtained during code block segmentation;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is the number of data which can be transmitted by the bound TTI;

when transmission diversity is employed, N _L2, otherwise, N_LEqual to the number of layers to which one transport block is mapped;

Q_mis a value corresponding to the modulation scheme.

In another possible implementation manner, the determining a start position of bit selection according to the unique redundancy version number includes: the starting position of the bit selection is determined according to the following calculation formula:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

N_cbis the size of the buffer of the bit stream after the buffer sub-block interleaving;

rv_idxis the unique redundancy version number.

In another possible implementation manner, the transmitting the modulated symbols in each TTI in the bundled TTIs respectively includes:

and transmitting modulated symbols corresponding to H/N bits in each TTI, wherein H is data which can be transmitted by the bound TTI, and N is the number of the bound TTI. Another aspect of the present invention provides a data transmission apparatus, including:

a processing module, configured to select a transport block size TBS value according to a pre-configured second table, where the second table is used to describe a corresponding relationship among the TBS value, the number of RBs in a resource block, and a TBS index, the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, a modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet a rate requirement required for TTI-based transmission;

and the transmission module is used for transmitting the data borne by the Physical Uplink Shared Channel (PUSCH) by adopting the bound TTI according to the selected TBS value.

In one possible implementation, the transmission module includes:

the selection unit is used for selecting the data borne by the PUSCH, the data borne by the PUSCH comprises all or part of information bits, the size of the information bits is the selected TBS value, when the data borne by the PUSCH is selected, the data selection starts in the storage position range of the information bits, and all the information bits starting from the selection starting point are continuously selected;

and the transmission unit is used for transmitting the selected data borne by the PUSCH by adopting the bound TTI.

In another possible implementation manner, the selecting unit is specifically configured to:

In another possible implementation manner, the selecting unit is specifically configured to: data is selected starting from the location indicated by RV 0.

In another possible implementation manner, the method further includes:

a storage module, configured to store the second table, where the TBS value, the number of RBs, and the TBS index described in the second table satisfy at least one of the following items:

In another possible implementation, the processing module selects the TBS value to be any value within the range [568, 2152] that is already contained in the first table.

In another possible implementation manner, the number of RBs corresponding to the TBS value selected by the processing module is less than or equal to 8.

In another possible implementation manner, the data carried by the PUSCH is data rate-matched for each code block,

the selecting unit is specifically configured to:

in the buffer for buffering the data stream after sub-block interleaving, continuously and circularly selecting data with the length of the sequence length after rate matching from the initial position of the data selection to obtain the data after rate matching of each code block, wherein the data stream after sub-block interleaving is the data stream obtained by performing Cyclic Redundancy Check (CRC) addition, code block segmentation and code block CRC addition on the information bits and performing sub-block interleaving on the coded stream;

the transmission unit is specifically configured to:

In another possible implementation manner, during initial transmission, the unique redundancy version number adopted by the transmission unit is 0; or, in retransmission, the unique redundancy version number adopted by the transmission unit is 0, 1, 2, or 3.

In another possible implementation manner, the selecting unit is specifically configured to determine, according to H ═ gxn, the number of data that can be transmitted in a bundled TTI, where,

h ═ gxn, where,

h is data that the bundled TTI can transmit;

n is the number of bonded TTIs.

In another possible implementation manner, the selecting unit is specifically configured to determine the length of the sequence after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is data which can be transmitted by the bundled TTI;

Q_mis a value corresponding to the modulation scheme.

In another possible implementation manner, the selecting unit is specifically configured to determine the starting position of bit selection according to the following calculation formula:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

In another possible implementation manner, the transmitting unit transmits the modulated symbols in each TTI in the bundled TTIs, respectively, where the transmitting unit includes:

and transmitting modulated symbols corresponding to H/N bits in each TTI, wherein H is data which can be transmitted by the bound TTI, and N is the number of the bound TTI.

In another aspect, the present invention provides a data transmission method, including:

receiving data borne by a Physical Uplink Shared Channel (PUSCH) transmitted by adopting a bound Transmission Time Interval (TTI);

determining a Transport Block Size (TBS) value, and processing the received data carried by the PUSCH by using the TBS value, wherein the TBS value is selected according to a pre-configured second table, the second table is used for describing a corresponding relation among the TBS value, the RB number and the TBS index, the RB number corresponding to the selected TBS value is less than or equal to a specific value, the modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK (quadrature phase shift keying), and the selected TBS value can meet the rate requirement required in TTI binding transmission.

In a possible implementation manner, the TBS value, the number of RBs, and the TBS index described in the second table satisfy at least one of the following items:

In another possible implementation, the specific value is 8. Still another aspect of the present invention provides a data transmission apparatus, including:

the receiving module is used for receiving data carried by a Physical Uplink Shared Channel (PUSCH) transmitted by adopting a bound Transmission Time Interval (TTI);

and the processing module is used for determining a Transport Block Size (TBS) value and processing the received data borne by the PUSCH by adopting the TBS value, wherein the TBS value is selected according to a pre-configured second table, the second table is used for describing the corresponding relation among the TBS value, the RB number and the TBS index, the RB number corresponding to the selected TBS value is less than or equal to a specific value, the modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK (quadrature phase shift keying), and the selected TBS value can meet the rate requirement required in TTI binding transmission.

In a possible implementation manner, the TBS value, the number of RBs, and the TBS index described in the second table adopted by the processing module satisfy at least one of the following items:

In another possible implementation manner, the number of RBs corresponding to the TBS value selected by the processing module is less than or equal to 8. The invention also provides a data selection method during TTI binding, which comprises the following steps:

determining data which can be transmitted by the bound TTI;

In a possible implementation manner, the selected starting point selected by the continuous loop is the position indicated by RV 0.

In another possible implementation manner, the data is data carried by a physical uplink shared channel, PUSCH, and the method further includes:

at the initial transmission, data which is continuously and circularly selected from the position indicated by the RV0 is transmitted.

In another possible implementation manner, the continuously and cyclically selecting the data that can be transmitted by the bundled TTI includes:

determining the sequence length after rate matching according to the number of the data which can be transmitted by the bound TTI;

and in the buffer of the data stream after the buffer sub-block interleaving, continuously and circularly selecting data with the length of the sequence after the rate matching from the initial position of the data selection.

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is data which can be transmitted by the bundled TTI;

Q_mis a value corresponding to the modulation mode;

wherein, the calculation formula of H is as follows:

H＝G×N，

n is the number of bonded TTIs.

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

N_cbis buffer subblock interleavingThe size of the cache of the later bitstream;

rv_idxis the unique redundancy version number. Another aspect of the present invention further provides a device for selecting data during TTI bundling, including:

a determining module, configured to determine data that can be transmitted by a bundled TTI;

and the selection module is used for continuously and circularly selecting the data which can be transmitted by the bound TTI.

In a possible implementation manner, the selection module continuously and circularly selects the selection starting point as the position indicated by RV 0.

In another possible implementation manner, the method further includes:

and the transmission module is used for transmitting data continuously and circularly selected from the position indicated by the RV0 during initial transmission.

In another possible implementation manner, the selecting module is specifically configured to:

In another possible implementation manner, during initial transmission, the unique redundancy version number adopted by the selection module is 0; or, when retransmitting, the unique redundancy version number adopted by the selection module is 0, 1, 2 or 3.

In another possible implementation manner, the selecting module is specifically configured to determine the length of the sequence after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is data which can be transmitted by the bundled TTI;

Q_mis a value corresponding to the modulation mode;

wherein, the calculation formula of H is as follows:

H＝G×N，

n is the number of bonded TTIs.

In another possible implementation manner, the selecting module is specifically configured to determine the starting position of data selection according to the following calculation formula:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

In another aspect, a bit transmission method is provided, including:

determining the number of bits which can be transmitted by a binding Transmission Time Interval (TTI), and determining the sequence length after rate matching according to the number of the bits which can be transmitted by the binding TTI;

determining the starting position of bit selection according to the unique redundancy version number;

in the buffer of the bit stream after the buffer sub-block interweaving, continuously and circularly selecting the bits with the length of the sequence after the rate matching from the initial position of the bit selection to obtain the bits after the rate matching of each code block;

code block concatenation is carried out on the bits after each code block rate matching;

and modulating the bits after code block concatenation, and transmitting the symbols obtained after modulation in each TTI in the bound TTIs respectively.

In one possible implementation, the unique redundancy version number is 0 at the time of initial transmission; or, at retransmission, the unique redundancy version number is 0, 1, 2 or 3.

In another possible implementation manner, the determining the number of bits that can be transmitted by the bundled TTI includes: determining the number of bits which can be transmitted by the bundled TTI according to the following calculation formula:

h ═ gxn, where,

h is the bits that the bundled TTI can transmit;

g is the total available bit number of the transmission of one transport block in one TTI;

n is the number of bonded TTIs.

In another possible implementation manner, the determining the length of the sequence after rate matching according to the bits that can be transmitted in the bundled TTI includes: determining the length of the sequence after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is the bits that the bundled TTI can transmit;

Q_mis a value corresponding to the modulation scheme.

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

In another aspect, there is provided a bit transmission apparatus including:

a first determining module, configured to determine bits that can be transmitted by a bundled transmission time interval TTI, and determine a sequence length after rate matching according to the bits that can be transmitted by the bundled TTI;

the second determining module is used for determining the starting position of bit selection according to the unique redundancy version number;

a selecting module, configured to continuously and cyclically select, in a buffer for buffering the bit stream after the sub-block interleaving, a bit with a length equal to the sequence length after the rate matching, starting from an initial position selected by the bit;

the cascade module is used for carrying out code block cascade on the bits after each code block rate matching;

and the transmission module is used for modulating the bits after the code block cascade connection and transmitting the symbols obtained after modulation in each TTI in the bound TTIs respectively.

In a possible implementation manner, in the initial transmission, the unique redundancy version number adopted by the second determining module is 0; or, in retransmission, the unique redundancy version number adopted by the second determining module is 0, 1, 2, or 3.

In another possible implementation manner, the first determining module is specifically configured to determine bits that can be transmitted by a bundled TTI according to the following calculation formula:

h ═ gxn, where,

h is the bits that the bundled TTI can transmit;

n is the number of bonded TTIs.

In another possible implementation manner, the first determining module is specifically configured to determine a calculation formula of the sequence length after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is the bits that the bundled TTI can transmit;

Q_mis a value corresponding to the modulation scheme.

In another possible implementation manner, the second determining module is specifically configured to determine a start position of bit selection according to the following calculation formula:

wherein k is₀Is the starting position;

is the intersection of subblocksThe number of rows of the matrix adopted during weaving;

rv_idxis the unique redundancy version number.

In another possible implementation manner, the transmission module is specifically configured to:

In another aspect, a UE is provided, including:

the processor is used for selecting a Transport Block Size (TBS) value according to a pre-configured second table, wherein the second table is used for describing a corresponding relation among the TBS value, the number of RBs in a Resource Block (RB) and a TBS index, the number of the RBs corresponding to the selected TBS value is less than or equal to a specific value, the modulation mode corresponding to the TBS index corresponding to the selected TBS value is Quadrature Phase Shift Keying (QPSK), and the selected TBS value can meet a rate requirement required during Transmission Time Interval (TTI) binding transmission;

and the transmitter is used for transmitting the data borne by the Physical Uplink Shared Channel (PUSCH) by adopting the bound TTI according to the selected TBS value.

In one possible implementation, the processor is specifically configured to:

In another possible implementation manner, the processor is specifically configured to:

In another possible implementation manner, the processor is specifically configured to determine the position indicated by RV0 as the selected starting point.

In another possible implementation manner, the transmitter is specifically configured to:

In another possible implementation manner, the TBS value, the number of RBs, and the TBS index described in the second table, which are adopted by the processor, satisfy at least one of the following items:

In another possible implementation, the TBS value selected by the processor is any value within the range [568, 2152] that is already contained in the first table.

In another possible implementation manner, the specific value in the second table adopted by the processor is 8.

In another possible implementation manner, the data carried by the PUSCH is data rate-matched for each code block, and the processor is specifically configured to:

in the buffer for buffering the data stream after subblock interleaving, continuously and circularly selecting data with the length of the sequence after rate matching from the initial position of the data selection to obtain the data after rate matching of each code block, wherein the data stream after subblock interleaving is the data stream obtained by performing Cyclic Redundancy Check (CRC) addition, code block segmentation and code block (CRC) addition on the information bits and performing subblock interleaving on the coded code stream;

modulating the data after code block concatenation;

the transmitter is specifically configured to:

and respectively transmitting the modulated symbols in each TTI in the bundled TTIs.

In another possible implementation manner, during initial transmission, the unique redundancy version number adopted by the processor is 0; or, in retransmission, the unique redundancy version number adopted by the processor is 0, 1, 2, or 3.

In another possible implementation manner, the processor is specifically configured to determine the number of data that can be transmitted by a bundled TTI according to the following calculation formula:

h ═ gxn, where,

h is data that the bundled TTI can transmit;

n is the number of bonded TTIs.

In another possible implementation manner, the processor is specifically configured to determine the length of the sequence after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is data which can be transmitted by the bundled TTI;

Q_mis a value corresponding to the modulation scheme.

In another possible implementation, the processor is specifically configured to determine a starting position of the bit selection according to the following calculation formula:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the only redundancy versionNumber (n).

In another possible implementation manner, the transmitter is specifically configured to transmit the modulated symbols corresponding to H/N bits in each TTI, H is data that can be transmitted by the bundled TTIs, and N is the number of the bundled TTIs.

In another aspect, a base station is provided, including:

the receiver is used for receiving data carried by a Physical Uplink Shared Channel (PUSCH) transmitted by adopting a bound Transmission Time Interval (TTI);

and the processor is used for determining a Transport Block Size (TBS) value and processing the received data carried by the PUSCH by adopting the TBS value, wherein the TBS value is selected according to a pre-configured second table, the second table is used for describing the corresponding relation among the TBS value, the RB number and the TBS index, the RB number corresponding to the selected TBS value is less than or equal to a specific value, the modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK (quadrature phase shift keying), and the selected TBS value can meet the rate requirement required in TTI binding transmission.

In one possible implementation manner, the TBS value, the number of RBs, and the TBS index described in the second table adopted by the processor satisfy at least one of the following items:

In another possible implementation, the selected TBS value selected by the processor is any value within the range of [568, 2152] and already contained in the first table.

In another aspect, a UE is provided, including:

a memory for storing data;

and the processor is used for determining the data which can be transmitted by the bundled TTI and continuously and circularly selecting the data which can be transmitted by the bundled TTI in the memory.

In one possible implementation, the processor is specifically configured to: the selected starting point for the continuous loop is the position indicated by RV 0.

In another possible implementation manner, the data is data carried by a physical uplink shared channel, PUSCH, and the base station further includes:

and the transmitter is used for transmitting data which is continuously and circularly selected from the position indicated by the RV0 at the initial transmission.

In another possible implementation manner, the memory is specifically configured to buffer a data stream after sub-block interleaving;

the processor is specifically configured to: determining the sequence length after rate matching according to the number of the data which can be transmitted by the bound TTI, and determining the initial position of data selection according to the unique redundancy version number; and continuously and circularly selecting data with the length of the sequence after the rate matching from the initial position of the data selection in the memory.

In another possible implementation manner, during initial transmission, the unique redundancy version number adopted by the processor is 0; or, in retransmission, the unique redundancy version number adopted by the processor is 0, 1, 2 or 3.

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is data which can be transmitted by the bundled TTI;

Q_mis a value corresponding to the modulation mode;

wherein, the calculation formula of H is as follows:

H＝G×N，

n is the number of bonded TTIs.

In another possible implementation manner, the processor is specifically configured to determine a starting position of data selection according to the following calculation formula:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

In another aspect, a UE is provided, including:

a memory for storing the bit stream after the sub-block interleaving;

a processor, configured to determine the number of bits that can be transmitted by a bundled TTI; determining the sequence length after rate matching according to the number of bits which can be transmitted by the bound TTI, and determining the initial position of bit selection according to the unique redundancy version number; in the memory, continuously and circularly selecting bits with the length being the sequence length after rate matching from the initial position selected by the bits to obtain the bits after rate matching of each code block; code block concatenation is carried out on the bits after each code block rate matching; modulating the bits after code block concatenation;

and the transmitter is used for transmitting the modulated symbols in each TTI in the bundled TTIs respectively.

In a possible implementation manner, at the time of initial transmission, the unique redundancy version number adopted by the processor is 0; or, in retransmission, the unique redundancy version number adopted by the processor is 0, 1, 2 or 3.

In another possible implementation manner, the processor is specifically configured to determine the number of bits that can be transmitted by the bundled TTI according to the following calculation formula:

h ═ gxn, where,

h is the bits that the bundled TTI can transmit;

n is the number of bonded TTIs.

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is the bits that the bundled TTI can transmit;

Q_mis a value corresponding to the modulation scheme.

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

In another possible implementation manner, the transmitter is specifically configured to: and transmitting modulated symbols corresponding to H/N bits in each TTI, wherein H is data which can be transmitted by the bound TTI, and N is the number of the bound TTI.

In another aspect, a bit receiving method is provided, including:

receiving modulation symbols of a bundled TTI transmission;

and processing the modulation symbols according to the unique redundancy version number.

In another aspect, a base station is provided, including:

a receiver configured to receive modulation symbols for bundled TTI transmissions and send the modulation symbols to a processor;

and the processor is used for processing the modulation symbols according to the unique redundancy version number. .

In one possible implementation manner, during initial transmission, the unique redundancy version number adopted by the processor is 0; or, at retransmission, the unique redundancy version number is 0, 1, 2 or 3.

According to the technical scheme, the second table indicates that the TBS value is large, the RB corresponding to the TBS is small, and the modulation mode corresponding to the TBS is QPSK, so that the requirement of the speed in the PUSCH can be met during TTI binding due to the large TBS value, the larger Turbo coding gain can be obtained, the overhead can be reduced, and the better MCL value can be obtained by using the small RB and QPSK, therefore, the coverage range of the PUSCH at the data speed can be improved by using the method.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating a data mapping method in the prior art;

FIG. 3 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a data mapping method according to the present invention;

FIG. 5 is a diagram illustrating another data mapping method according to the present invention;

FIG. 6 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;

FIG. 7 is a flowchart illustrating a data transmission method according to another embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another embodiment of a data transmission device according to the present invention;

FIG. 9 is a flowchart illustrating a data selecting method during TTI bundling according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a data selecting apparatus during TTI bundling according to an embodiment of the present invention;

FIG. 11 is a diagram illustrating bit buffering after sub-block interleaving in the prior art;

FIG. 12 is a diagram illustrating a bit selection and puncturing process in the prior art;

FIG. 13 is a diagram illustrating initial transmission and retransmission in a bundled TTI transmission according to the prior art;

fig. 14 is a diagram illustrating bit selection and puncturing procedure when TBS in the second table is used for TTI transmission in the prior art;

FIG. 15 is a flowchart illustrating a bit transmission method according to an embodiment of the present invention;

FIG. 16 is a diagram illustrating a bit selection and puncturing procedure for bundled TTI transmission according to an embodiment of the present invention;

FIG. 17 is a diagram illustrating initial transmission and retransmission during TTI transmission bundled in an embodiment of the present invention;

FIG. 18 is a block diagram of a bit transmission apparatus according to an embodiment of the present invention;

FIG. 19 is a diagram illustrating a UE according to an embodiment of the present invention;

FIG. 20 is a block diagram of a base station according to an embodiment of the present invention;

FIG. 21 is a diagram illustrating a UE according to another embodiment of the present invention;

FIG. 22 is a diagram illustrating a UE according to another embodiment of the present invention;

FIG. 23 is a flowchart illustrating a bit receiving method according to an embodiment of the present invention;

fig. 24 is a schematic structural diagram of a base station according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the prior art, the TBS values that can be used when data is transmitted on PUSCH are shown in table 1:

TABLE 1

In Table 1, N_PRBDenotes the number of RB, I_TBSDenotes the TBS index, I_TBSThe values of (c) can be determined by table 2.

TABLE 2

In Table 2, I_MCSIs Modulation and Coding Scheme (MCS) index, rv_idxRepresenting the redundancy version, Q ', employed in the transmission of PUSCH data'_mRepresents a preparation system of Q'_mWhen the number is equal to 2, QPSK Modulation is shown, and 4 and 6 represent 16 Quadrature Amplitude Modulation (QAM) Modulation and 64QAM Modulation, respectively.

In the prior art, a base station includes an MCS index I in an uplink scheduling command (UL grant)_MCSAnd the number N of RB selected_PRBAnd so on, to schedule the transmission of uplink data. The base station can also configure the UE to perform data transmission of the PUSCH in a TTI bundling manner. In the prior art, the application of the TTI bundling scheme is limited to the case where the number of RBs is less than or equal to 3 and the QPSK modulation scheme is used. Then, under the restriction, the TBS value that can be used in TTI bundling is corresponding to N_PRBIs 1-3 and I_TBSIs a value of 0 to 10, and as can be seen from table 1, the TBS value is now at a maximum value of 504.

As described in the background, for a TTI bundling scenario where 4 consecutive subframes are bundled, the TBS value at 504 does not meet the data rate requirement in PUSCH.

To meet the requirement of data Rate in PUSCH, taking the data Rate in PUSCH as 384kbps as an example, when 4 TTI bundling is adopted and the Block Error Rate (BLER) is 10%, the TBS needs to be at least: 1707, 384 × 4/90%.

In conjunction with table 1, a set number of values closest to 1707 may be selected, for example, 1736 or 1800.

That is to say, in the embodiment of the present invention, to meet the coverage requirement of the data rate in the PUSCH, it is necessary to simultaneously meet: the RB is small, the QPSK modulation mode is adopted, and the TBS value is large. Wherein, a smaller RB means that the number of RBs is smaller than or equal to a specific value, the specific value is, for example, 8, and a larger TBS value means that the TBS value can satisfy the data rate requirement in the PUSCH in the TTI bundling transmission mode, that is, the TBS value is at least: (data rate in PUSCH) × (number of bundled TTIs)/(1-BLER), for example a value in the range between [568, 2152] and which already exists in the existing table (table 1), such as 1736 or 1800. For simplicity in the following embodiments, the number of RBs less than or equal to a specific value is referred to as RB smaller, and the TBS value capable of satisfying the data rate requirement in PUSCH at the time of TTI bundling is referred to as TBS value larger.

However, it can also be seen from table 1 that when the TBS value is 1736 or 1800, the corresponding modulation scheme is no longer QPSK and/or the corresponding number of RBs is no longer small, e.g., I_TBS＝14，N_PRBThe TBS corresponding to 6 is 1736, but the modulation scheme at this time is 16 QAM.

In the embodiment of the invention, in order to simultaneously satisfy the above conditions: the RB is small, QPSK modulation mode is used, and TBS value is large, table 1 can be modified, and the modified table is used as the second table. The method can comprise the following steps:

the first method is as follows: in the second table, the TBS value corresponding to the modulation scheme corresponding to the TBS index when the number of RBs is less than or equal to the specific value and the modulation scheme corresponding to the TBS index is QPSK is obtained by modifying the TBS value corresponding to the same number of RBs and the same TBS index in the first table, so that the modified TBS value can meet the rate requirement required for TTI bundling transmission.

For example, originally I_TBS＝8，N_PRBTBS value of 392 corresponds to 3, and in the present example, I is_TBS＝8，N_PRBThe TBS value corresponding to 3 is changed to 1736. The second method comprises the following steps: in the second table, the modulation mode corresponding to the TBS index when the RB number is less than or equal to the specific value and the TBS value can satisfy the rate requirement required by TTI bundling transmission is the first oneThe modulation mode corresponding to the TBS index corresponding to the same number of RBs and the same TBS value in a table is modified, and the modified modulation mode is QPSK.

For example, originally N_PRBTBS 1736 corresponds to I3_TBS23, and I_TBSThe modulation scheme is 64QAM when 23, and I is used in the embodiment of the present invention_TBSThe modulation scheme when 23 is changed to QPSK.

The third method comprises the following steps: in the second table, when the modulation mode corresponding to the TBS index is QPSK and the TBS value can satisfy the rate requirement required for TTI bundling transmission, the corresponding number of RBs is greater than the maximum value of the number of RBs that can be selected in the first table for TTI bundling transmission;

for example, in the prior art, the maximum value of the number of RBs that can be selected in the first table during TTI bundling transmission is 3, but in the embodiment of the present invention, the number of RBs that can be selected may be increased to 8, for example, so according to the first table (table 1), when the number of RBs that can be selected is less than or equal to 8, the above TBS value that meets the rate requirement during TTI bundling transmission may also be found and the corresponding modulation scheme is QPSK.

Specifically, the present invention is given by the following examples.

Fig. 1 is a schematic flow chart of an embodiment of a data transmission method of the present invention, including:

step 11: UE selects a TBS value according to a pre-configured second table, wherein the second table is used for describing the corresponding relation among the TBS value, the number of RBs and the TBS index, the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, the modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet the rate requirement required by TTI binding transmission;

step 12: and the UE transmits the data borne by the PUSCH by adopting the bound TTI according to the selected TBS.

In the embodiment of the present invention, the existing table, that is, table 1 is referred to as a first table, while the table newly proposed in the embodiment of the present invention is referred to as a second table, and both the first table and the second table may be configured in advance in the UE.

In addition, the uplink data of the UE is scheduled by the base station, that is, before step 11, the method may further include: the UE receives configuration information sent by a base station, wherein the configuration information is used for indicating that the data borne by the PUSCH is transmitted by adopting the bound TTI; and the UE receives scheduling information sent by the base station, wherein the scheduling information comprises the index of the MCS and the number of the RBs.

After the UE receives the scheduling information, the index I of the corresponding TBS may be obtained by searching according to the index of the MCS contained therein and table 2 (table 2 may be pre-configured in the UE)_TBSThen according to I_TBSNumber of RBs N_PRBAnd a second table (prior art according to table 1) look up to obtain the value of TBS. And then, according to the searched TBS value and the received configuration information, the data borne by the PUSCH can be transmitted by adopting the bound TTI. The prior art has only the first table, and therefore the first table is used regardless of whether or not TTI is bonded, but, as described in the background art, when TTI is bonded according to the prior art first table, TBS is in QPSK modulation with RB less than or equal to 3, i.e., N in table 1_PRBIs 1-3 and I_TBSA TBS corresponding to 0-10 cannot meet the rate requirements for data rates in PUSCH. Therefore, the embodiment of the present invention provides a second table, which is used in TTI bundling, and the second table has a smaller RB and a larger TBS corresponding to the QPSK modulation scheme to satisfy the data rate requirement in the PUSCH.

The second table simultaneously satisfies that the RB is small, the QPSK modulation mode is adopted, and the TBS is large, so that the service data at the data rate in the PUSCH can be transmitted in the TTI binding mode.

The present embodiment provides the second table as described above, where the second table indicates that the value of the TBS is larger, the RB corresponding to the TBS is smaller, and the modulation mode corresponding to the TBS is QPSK, because the value of the TBS is larger, the requirement of the rate in the PUSCH can be satisfied, and a larger Turbo coding gain and a reduced overhead can be obtained, and a better MCL value can be obtained by using a smaller RB and QPSK, and therefore, the coverage in the PUSCH at the data rate can be improved by using the above method.

Further, when the TBS selected according to the second table transmits data carried by the PUSCH using the bundled TTI, if the existing transmission method is used, a problem of losing more information bits may occur. Taking binding of 4 consecutive subframes as an example, in the prior art, when data is transmitted in a TTI binding manner, 4 redundancy versions obtained by encoding one transport block are respectively mapped into 4 consecutive TTIs, where the 4 redundancy version numbers may be 0, 2, 3, and 1. After Turbo 1/3 encoding, the information bits need to be rate matched according to the size of available resources, and the redundancy version number indicates the start position of the data selected during rate matching in the data obtained after Turbo 1/3 encoding. But such a transmission may result in information bit loss.

For example, referring to fig. 2, assuming that the TBS value is 1736 and the corresponding number of RBs is 3, the number of bits that can be transmitted in one TTI is 12 (the number of subcarriers in each RB) × 12 (the number of data symbols in each RB) × 3 (the number of RBs) × 2 (the number of bits corresponding to each QPSK modulation symbol) × 864 bits. 1736 information bits are first added with 24-bit Cyclic Check (CRC), and then (1736+24) × 2 Check bits are added to complete Turbo 1/3 encoding. The data to be transmitted by using the TTI bundling manner includes information bits and check bits, different redundancy versions represent different starting positions of the selected data in the Turbo 1/3-encoded data, and the different redundancy versions are respectively denoted as RV0, RV1, RV2, and RV3, as can be seen from fig. 2, when 864-bit data are selected for transmission in each subframe, unselected data may exist between subframes, that is, some information bits are lost, for example, unselected data between RV0 and RV1 is lost.

To solve this problem, the present invention provides the following one embodiment.

FIG. 3 is a flow chart of another embodiment of a data transmission method according to the present invention,

step 31: the TBS is selected according to the second table.

See step 11 for details.

The data of the PUSCH bearer may then be transmitted using the bundled TTI according to the selected TBS, which may specifically include the following steps 32-33.

Step 32: and selecting data borne by a PUSCH, wherein the data borne by the PUSCH comprises information bits, the size of the information bits is the selected TBS value, when the data borne by the PUSCH is selected, the data is selected within the range of the storage position of the information bits, and all the information bits starting from the selection starting point are continuously selected.

Wherein, since the number of information bits is the TBS selected according to the second table, if the selection method according to the prior art is adopted, a part of information bits will be lost. However, in the embodiment, a mode of continuously selecting information bits is adopted, and since all information bits starting from the selection starting point are continuously selected, the situation of discontinuity is avoided, the coverage of the information bits from the position indicated by RV0 to the position indicated by RV1 can be increased, and the number of lost information bits can be reduced.

Optionally, in order to ensure that all information bits starting from the selection starting point are continuously selected, data that can be transmitted by the bundled TTIs may be continuously and cyclically selected, for example, referring to fig. 4, taking 864-bit data that can be transmitted by each subframe as an example, in a 4-subframe bundling scenario, this embodiment may continuously select 864 × 4-bit data, where the continuously selected data, that is, the 864 × 4-bit data, and the corresponding redundancy version number may be named as RV 0.

Optionally, if the starting position of the RV0 is used as a starting point, 2 864-bit data can be continuously selected to cover 1736-bit information bits, see fig. 5, or 864 × 2 data can be continuously selected, where the version corresponding to the 864 × 2 data is RV0, and the remaining 2 864-bit data can be continuously selected or separately selected, and fig. 5 shows a schematic of separate selection.

Optionally, when selecting data, the selection starting point is located in the space where the information bits are located, specifically, the selection starting point may be the position indicated by RV0, that is, the data is selected from the position indicated by RV 0.

Optionally, at the time of initial transmission, data which starts from the position indicated by RV0 and is selected continuously is transmitted, for example, 864 × 4 bits of data as shown in fig. 4 or 864 × 2 bits of data as shown in fig. 5 are transmitted at the time of initial transmission.

Step 33: and transmitting the selected data borne by the PUSCH by adopting the bound TTI.

For example, when 864 × 4 bits of data are selected consecutively and the number of bundled TTIs is 4, the selected data is divided into 4 parts, and each part of 864 bits of data is transmitted in one TTI.

In the embodiment, more data can be transmitted in shorter time delay by adopting the TTI binding mode, so that the transmission time delay is reduced; by adopting a larger TBS, the Turbo coding gain can be larger, and the overhead of header information and Cyclic Check (CRC) is reduced; by adopting a small number of RBs, the equivalent noise during link calculation is kept at a low level; modifying the mapping mode of TTI binding to ensure that more information bits can be transmitted; by using QPSK modulation, a larger MCL can be obtained with a better link budget compared to 16QAM and 64 QAM. By the method, the coverage range of the PUSCH at the data rate can be improved.

Fig. 6 is a schematic structural diagram of an embodiment of a data transmission device according to the present invention, where the device may be a device for executing the method, and the device may be located on a UE side, and the device includes: a processing module 61 and a transmission module 62; the processing module 61 is configured to select a TBS value according to a pre-configured second table, where the second table is used to describe a corresponding relationship among the TBS value, the number of RBs, and a TBS index, the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, a modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet a rate requirement required for TTI bundling transmission; the transmission module 62 is configured to transmit the data carried by the PUSCH in the bundled TTI according to the selected TBS value.

Optionally, the transmission module may include:

Optionally, the selecting unit is specifically configured to:

Optionally, the selecting unit is specifically configured to: data is selected starting from the location indicated by RV 0.

Optionally, the transmission unit is specifically configured to: at the initial transmission, continuous data selected from the position indicated by the RV0 is transmitted.

Optionally, the apparatus may further include:

Optionally, the TBS value selected by the processing module is any value within the range [568, 2152] and already contained in the first table.

Optionally, the number of RBs corresponding to the TBS value selected by the processing module is less than or equal to 8.

Fig. 7 is a schematic flowchart of another embodiment of a data transmission method according to the present invention, including:

step 71: a base station receives data borne by a PUSCH transmitted by a bound TTI;

optionally, the base station may first send the configuration information to the UE, to indicate that the data carried by the PUSCH is transmitted by using the bundled TTI, and then receive the data carried by the PUSCH and transmitted by using the bundled TTI by the UE.

Step 72: the base station determines a TBS value, and processes the received data carried by the PUSCH by adopting the TBS value, wherein the TBS value is selected according to a pre-configured second table, the second table is used for describing the corresponding relation among the TBS value, the RB number and the TBS index, the RB number corresponding to the selected TBS value is less than or equal to a specific value, the modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet the speed requirement required by TTI binding transmission.

After receiving the data carried by the PUSCH, the base station may perform demodulation, decoding, and other processing, where the decoding needs to be performed according to the TBS value.

Optionally, the TBS value, the number of RBs, and the TBS index described in the second table satisfy at least one of the following items:

Optionally, the selected TBS value is any value within the range [568, 2152] and already contained in the first table.

Optionally, the specific value is 8.

Fig. 8 is a schematic structural diagram of another embodiment of the data transmission device of the present invention, where the device may be a base station, and the device includes a receiving module 81 and a processing module 82; the receiving module 81 is configured to receive data carried by a PUSCH transmitted by using a bundled TTI; the processing module 82 is configured to determine a TBS value, and process the received data carried by the PUSCH using the TBS value, where the TBS value is selected according to a second table configured in advance, the second table is used to describe a correspondence between the TBS value, the number of RBs, and a TBS index, the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, a modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet a rate requirement required for TTI bundling transmission.

Optionally, the TBS value, the number of RBs, and the TBS index described in the second table adopted by the processing module satisfy at least one of the following items:

Fig. 9 is a flowchart illustrating a data selecting method during TTI bundling according to an embodiment of the present invention, including:

step 91: determining data which can be transmitted by the bound TTI;

and step 92: and continuously and circularly selecting the data which can be transmitted by the bound TTI.

For example, if the number of bundled TTIs is 4 and the data that can be transmitted per TTI is 864 bits, the data that can be transmitted in the bundled TTI is 864 × 4 bits of data. Thereafter, 864 × 4 bits of data are successively selected in a loop in the buffer for storing data. A specific illustration can be seen in fig. 4.

The data refers to data at the bit level.

Optionally, the data is data carried by a PUSCH; optionally, the data carried by the PUSCH includes information bits, and the selected starting point is within the range of the storage location where the information bits are located.

Optionally, the selected starting point selected by the continuous loop is the position indicated by RV 0.

Optionally, the method may further include: and at the initial transmission, transmitting data which is continuously and circularly selected from the position indicated by the RV 0.

In addition, the present invention may also provide an embodiment, where the continuously selected data is not data that can be transmitted by all bundled TTIs, but the continuously selected data similar to that shown in fig. 5 may cover at least part of the information bits, where at least part of the information bits refer to information bits from the selection starting point, that is, an embodiment may also be provided:

data is selected starting from the range of storage locations of the information bits and all the information bits starting from the selection starting point are selected successively.

Correspondingly, the present invention further provides a data selecting device during TTI bundling, which may be located in a UE, and referring to fig. 10, the device includes a determining module 101 and a selecting module 102; the determining module 101 is configured to determine data that can be transmitted by a bundled TTI; the selecting module 102 is configured to continuously and cyclically select data that can be transmitted by the bundled TTI.

Optionally, the selection starting point selected by the selection module in a continuous cycle is the position indicated by RV 0.

Optionally, the apparatus may further include: and the transmission module is used for transmitting data continuously and circularly selected from the position indicated by the RV0 during initial transmission.

The present embodiment can reduce the number of lost information bits by continuously selecting all information bits from the selection start point.

In the above embodiment, the data may be data carried by a PUSCH, and when the selection starting point is the same as the starting point of the information bits, the data carried by the PUSCH includes all the information bits, and when the selection starting point is after the starting point of the information bits, the data carried by the PUSCH includes a part of the information bits, where the part of the information bits refers to all the information bits starting from the selection starting point. In addition, the size of the information bits is the selected TBS value.

Further, data transmission is typically preceded by channel coding. Channel coding will typically include the following steps:

(1) cyclic Redundancy Check (CRC) addition: and adding a check block after the transmission block. Usually, the check block is 24 bits, and if the transport block is a bit and the CRC is added to B bit, B is a + 24;

(2) code block segmentation and code block CRC addition: if B > 6144, the transport block and check block of B bits in total are segmented and 24-bit CRC check block is added to each code block. Assuming that C code blocks are segmented, the resulting code block can be expressed as:

where r is the code block number, K_rThe number of bits in a code block with sequence number r;

(3) coding, taking Turbo coding as an example: for eachFor each code block, the coded bits for the code block with index r include three coded streams, which are denoted as:

i＝0，1，2，D_rnumber of bits in coded stream with sequence number i of code block with sequence number r, D_r＝K_r+4, where the encoded stream with i equal to 0 contains information bits, and the encoded stream with i equal to 1, 2 is redundant bits added by Turbo coding;

(4) rate matching: for each code block, the three coded streams of each code block are first sub-block interleaved, and then the interleaved bits are bit-selected and punctured.

Wherein three coded streams are targeted

When sub-block interleaving is performed when i is 0, 1 and 2, a column is designed

Behavior

The matrix of (a) is,

is to satisfy

Writing the bits of each encoded stream into the matrix according to rows, adding null bits when the bits of the encoded stream are insufficient, performing column permutation on the matrix, and reading out the bit stream according to columns to obtain the bit stream of

i＝0，1，2，K_ΠThe number of bits per bit stream is the number of bits in each of the three bit streams of one code block after sub-block interleaving, and the stream with i ═ 0 includes information bits. The three bit streams are put into a buffer, and the size of the buffer is N for PUSCH data_cb＝K_w＝3×K_ΠNote that the bits in the cache are: w is a_k，k＝0，1，...，N_cb-1; wherein,

j＝0，1，...，K_Π-1. Thus the data arrangement in the buffer can be seen in FIG. 11, K above_ΠThe bit comprises K_rAn information bit, the following 2K_ΠEach bit is a check bit.

The process of bit selection and puncturing is as follows: determining a start position k for bit selection₀And the length of the sequence E after rate matching_rThen, see FIG. 12, from k₀At the beginning, at w_k，k＝0，1，...，N_cbSequential round-robin selection E in-1_rAnd each selected bit is not a null bit.

On the one hand, the sequence length E after rate matching of code blocks with sequence number r_rCan be determined as follows:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein r is the code block sequence number; c is the number of code blocks obtained during code block segmentation;

meaning that the rounding is done down,

indicating rounding up.

G' mod C, mod denotes a modulo operation;

G′＝G/(N_L×Q_m) G is the total number of available bits for transmission of a transport block in a subframe, i.e. it represents the resources that a transport block can occupy in a subframe at the bit level;

in miningWhen using transmit diversity, N _L2, otherwise, N_LEqual to the number of layers to which one transport block is mapped;

Q_mis a value corresponding to a modulation scheme, and Q is set when the modulation scheme is QPSK _m2; when the modulation mode is 16QAM, Q_m4; when the modulation mode is 64QAM, Q_m＝6。

On the other hand, the start position k of the bit selection₀The following formula can be used to computationally determine:

wherein,

is the number of rows of the matrix adopted when the subblocks are interleaved; n is a radical of_cbIs the size of the buffer of the bit stream after the buffer sub-block interleaving; rv_idxIs a redundant version number, which can take the following values:

rv

_idx0, 1, 2 or 3.

For a code block with sequence number r, the bits obtained after rate matching can be represented as:

(5) code block concatenation: and sequentially connecting the bits obtained after rate matching of each code block to obtain the final coded bits, wherein the number of the bits is G.

After the channel coding is completed, the G coded bits of a transmission block are modulated, and then the modulation symbols are placed on the corresponding resources of a subframe for transmission.

In the prior art, the transmission of data carried by the PUSCH may be configured by using a bundled TTI, where one transmission of a transport block occupies 4 subframes. When the transmission block is initially transmitted, 4 TTIs are used for bundling, and the base station feeds back whether the data in the 4 TTIs are correctly detected or not through a positive Acknowledgement (ACK) or Negative Acknowledgement (NACK) bit. If the UE receives NACK feedback from the base station, retransmission of the transport block will be performed after 16 TTIs, and the retransmission also uses 4 TTI bundling.

In the prior art, when data is transmitted by using a bundled TTI and rate matching is performed, in 4 subframes (or referred to as TTIs) that are bundled, each subframe performs k using a redundancy version number₀The 4 subframes may adopt different redundancy versions, such as rv_idxFig. 13 shows a schematic diagram of an FDD system with

sequence

0, 2, 3, and 1, where when data is transmitted using bundled TTIs, each TTI in the bundled TTIs corresponds to a different redundancy version number.

As described in the above embodiments, when data carried by PUSCH is transmitted using bundled TTIs, the size of the transport block is TBS selected according to the second table, where the TBS value in the second table is larger, the RB corresponding to TBS is smaller, and the modulation scheme corresponding to TBS is QPSK, and when rv is transmitted, the modulation scheme corresponding to TBS is QPSK_idxWhen the content is equal to 0, the content,

k₀(rv_idx＝0)+E_r＜K_Πand, when rv_idxWhen 1, k₀(rv_idx＝1)＞k₀(rv_idx＝0)+E_r. That is, referring to FIG. 14, in cache

And

the information bits contained in between are not selected and thus cannot be transmitted, resulting in the loss of information bits.

In order to reduce the loss of information bits, the following embodiments are also provided.

In the embodiment of the present invention, when selecting bits, all information bits starting from a selection start point are continuously selected, or in other words, bits that can be transmitted by a bonded TTI are continuously and cyclically selected. The method can be used for modifying rate matching and code block concatenation in the existing channel coding. It is to be understood that, for corresponding to the above embodiments, the selected bit may also be referred to as selected data, one bit being data of one bit, the data being 0 or 1.

Referring to fig. 15, the present invention provides an embodiment comprising:

step 151: determining the number of bits which can be transmitted by the bound TTI;

the number of bits that can be transmitted in a bundled TTI is represented by H, where H is gxn; as described above, G is the number of bits available for transmission of one transport block in one subframe, and N is the number of bonded TTIs, for example, N ═ 4.

Different from the prior art that G is determined for each TTI, H determined in this embodiment is corresponding to a bundled TTI, and H is the total number of available bits for transmission of one transport block in N bundled TTIs, that is, it indicates, at a bit level, resources that can be occupied by one transport block in N bundled TTIs.

Step 152: determining the sequence length after rate matching according to the number of bits which can be transmitted by the bound TTI;

step 153: the starting position of the bit selection is determined according to the unique redundancy version number.

Unlike the prior art, in determining the sequence length, G is adopted in the prior art, while H is adopted in the present embodiment; in determining the above-mentioned starting position k₀In the prior art, a start position is determined for each TTI, whereas in the present embodiment, a start position is determined for N bundled TTIs.

Specifically, in this embodiment, the sequence length E after rate matching of code blocks with sequence number r_r' can be determined as follows:

if r is less than or equal to C-gamma-1, then

If not, then,

meaning that the rounding is done down,

indicating rounding up.

G' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is the total number of bits available for transmission of a transport block in N bonding TTIs, i.e. it represents the resources that a transport block can occupy in N bonding TTIs at the bit level;

In this embodiment, the start position k of bit selection₀The following formula can be used to computationally determine:

wherein,

rv

_idx0, 1, 2 or 3. Optionally, rv when initial transmission is performed in the bundled TTI_idxChoose 0, can be according to rv when retransmitting_idxK is calculated in the order of 2, 3, 1, 0, 2, 3, 1₀。

Step 154: and in the buffer for buffering the bit stream after the sub-block interleaving, continuously and circularly selecting the bits with the length of the sequence after the rate matching from the initial position of the bit selection to obtain the bits after the rate matching of each code block.

As shown in fig. 16, in the cache w_k，k＝0，1，...，N_cbIn-1, at initial transmission, from k₀(rv_idx0) and E calculated from H is selected in a continuous loop_r' of the bit sequence.

The bits selected in this step 154, i.e. the rate-matched bits, for the code block with sequence number r, the rate-matched bits can be represented as:

E_r' is calculated from H.

Optionally, corresponding to the foregoing embodiment, the bit stream after the sub-block interleaving is: and a bit stream obtained by performing CRC addition, code block segmentation and code block CRC addition on the information bits with the size of the TBS selected according to the second table and performing sub-block interleaving on the coded stream subjected to Turbo coding.

Step 155: code block concatenation is carried out on the bits after each code block rate matching;

when code blocks are cascaded, bits obtained after rate matching of each code block are sequentially connected to obtain the final coded bits of one transmission block, wherein the number of the coded bits is H.

Step 156: and modulating the bits after code block concatenation, and transmitting the symbols obtained after modulation in each TTI in the bound TTIs respectively.

And if the number of bits after code block concatenation is H, transmitting a modulated symbol corresponding to H/N bits in each TTI.

Further, at the time of retransmission, the starting positions of the bundled TTIs also correspond to only one redundancy version, see fig. 17, and at the time of retransmission, the starting positions of the N bundled TTIs are according to rv_idx＝2、rv_idx＝3、rv _idx1 or rv_idxDetermined as 0.

In this embodiment, the existing processes such as rate matching and code block concatenation are modified according to the above procedure, so that the loss of information bits can be reduced, and more information bits can be transmitted.

Fig. 18 is a schematic structural diagram of an embodiment of a bit transmission apparatus according to the present invention, which may be located on a UE side and includes a first determining module 181, a second determining module 182, a selecting module 183, a cascading module 184, and a transmitting module 185; the first determining module 181 is configured to determine the number of bits that can be transmitted by the bundled TTI, and determine the sequence length after rate matching according to the number of bits that can be transmitted by the bundled TTI; the second determining module 182 is configured to determine a start position of the bit selection according to the unique redundancy version number; the selecting module 183 is configured to continuously and cyclically select, in the buffer for buffering the bit stream after the sub-block interleaving, bits with a length equal to the sequence length after the rate matching, starting from the start position selected by the bits; the concatenation module 184 is configured to perform code block concatenation on the bits after rate matching of each code block; the transmission module 185 is configured to modulate bits after code block concatenation, and transmit symbols obtained after modulation in each TTI in the bundled TTIs.

Optionally, in the initial transmission, the unique redundancy version number adopted by the second determining module is 0; or, in retransmission, the unique redundancy version number adopted by the second determining module is 0, 1, 2, or 3.

Optionally, the calculation formula of the first determining module determining the number of bits that can be transmitted by the bundled TTI is as follows:

h ═ gxn, where,

h is the number of bits that can be transmitted by the bundled TTI;

n is the number of bonded TTIs.

Optionally, the second determining module determines a calculation formula of the sequence length after rate matching according to the bits that can be transmitted by the bundled TTI, where the calculation formula is as follows:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is the bits that the bundled TTI can transmit;

Q_mis a value corresponding to the modulation scheme.

Optionally, the calculation formula of the second determining module that determines the start position of the bit selection according to the unique redundancy version number is as follows:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

Optionally, the transmission module is specifically configured to:

Fig. 19 is a schematic structural diagram of an embodiment of a UE of the present invention, which includes a processor 191 and a transmitter 192; the processor 191 is configured to select a transport block size, TBS, value according to a pre-configured second table, where the second table is used to describe a correspondence relationship among the TBS value, the number of RBs in a resource block, and a TBS index, where the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, a modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet a rate requirement required for TTI-bonding transmission in a transmission time interval; the transmitter 192 is configured to transmit data carried by a physical uplink shared channel, PUSCH, using a bundled TTI according to the selected TBS value.

Optionally, the processor is specifically configured to:

Optionally, the processor is specifically configured to determine the position indicated by RV0 as the selected starting point.

Optionally, the transmitter is specifically configured to:

Optionally, the TBS value, the number of RBs, and the TBS index described in the second table used by the processor satisfy at least one of the following items:

Optionally, the TBS value selected by the processor is any value within the range [568, 2152] and already contained in the first table.

Optionally, the specific value in the second table employed by the processor is 8.

Optionally, the data carried by the PUSCH is data rate-matched for each code block, and the processor is specifically configured to:

determining data which can be transmitted by the bound TTI;

determining the sequence length after rate matching according to the data which can be transmitted by the bound TTI, and determining the initial position of data selection according to the unique redundancy version number;

continuously and circularly selecting data with the length of the sequence length after rate matching from the initial position of data selection in the buffer for buffering the data stream after subblock interleaving to obtain the data after rate matching of each code block, wherein the data stream after subblock interleaving is the data stream obtained by performing CRC addition, code block segmentation and code block CRC addition on the information data and performing subblock interleaving on the coded stream;

modulating the data after code block concatenation;

the transmitter is specifically configured to:

Optionally, in the initial transmission, the unique redundancy version number adopted by the processor is 0; or, in retransmission, the unique redundancy version number adopted by the processor is 0, 1, 2, or 3.

Optionally, the processor determines that the calculation formula of the data that can be transmitted by the bundled TTI is as follows:

h ═ gxn, where,

h is data that the bundled TTI can transmit;

n is the number of bonded TTIs.

Optionally, the processor determines a calculation formula of the sequence length after rate matching according to the data that can be transmitted by the bundled TTI, where the calculation formula is as follows:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is data which can be transmitted by the bundled TTI;

Q_mis a value corresponding to the modulation scheme.

Optionally, the calculation formula for determining the start position of the bit selection by the processor according to the unique redundancy version number is as follows:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

Optionally, the transmitter is specifically configured to transmit the modulated symbols corresponding to H/N bits in each TTI, where H is data that can be transmitted by the bundled TTIs, and N is the number of the bundled TTIs.

Fig. 20 is a schematic structural diagram of a base station according to an embodiment of the present invention, which includes a receiver 201 and a processor 202; the receiver 201 is configured to receive data carried by a physical uplink shared channel PUSCH transmitted by using a bundled transmission time interval TTI; the processor 202 is configured to determine a transport block size TBS value, and process the received data carried by the PUSCH using the TBS value, where the TBS value is selected according to a second table configured in advance, the second table is used to describe a correspondence between a TBS value, a number of RBs, and a TBS index, the number of RBs corresponding to the selected TBS value is less than or equal to a specific value, a modulation mode corresponding to the TBS index corresponding to the selected TBS value is QPSK, and the selected TBS value can meet a rate requirement required for TTI bundling transmission.

Optionally, the selected TBS value selected by the processor is any value within the range [568, 2152] and already contained in the first table.

Fig. 21 is a schematic structural diagram of another embodiment of the UE of the present invention, which includes a memory 211 and a processor 212; the memory 211 is used for storing data; the processor 212 is configured to determine data that can be transmitted by the bundled TTIs, and continuously and cyclically select the data that can be transmitted by the bundled TTIs in the memory.

Optionally, the processor is specifically configured to: the selected starting point for the continuous loop is the position indicated by RV 0.

Optionally, the data is data carried by a physical uplink shared channel PUSCH, and the base station further includes: and the transmitter is used for transmitting data which is continuously and circularly selected from the position indicated by the RV0 at the initial transmission.

Optionally, the memory is specifically configured to buffer the data stream after the sub-block interleaving; the processor is specifically configured to: determining the sequence length after rate matching according to the number of the data which can be transmitted by the bound TTI, and determining the initial position of data selection according to the unique redundancy version number; and continuously and circularly selecting data with the length of the sequence after the rate matching from the initial position of the data selection in the memory.

Optionally, in the initial transmission, the unique redundancy version number adopted by the processor is 0; or, in retransmission, the unique redundancy version number adopted by the processor is 0, 1, 2 or 3.

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

atmosphere is rounded upwards;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is data which can be transmitted by the bundled TTI;

Q_mis a value corresponding to the modulation mode;

wherein, the calculation formula of H is as follows:

H＝G×N，

n is the number of bonded TTIs.

Optionally, the calculation formula for determining the starting position of the data selection by the processor according to the unique redundancy version number is as follows:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

Fig. 22 is a schematic structural diagram of another embodiment of the UE of the present invention, which includes a memory 221, a processor 222, and a transmitter 223; the memory 221 is used for storing the bit stream after sub-block interleaving; processor 222 is configured to determine a number of bits that can be transmitted for the bundled TTI; determining the sequence length after rate matching according to the number of bits which can be transmitted by the bound TTI, and determining the initial position of bit selection according to the unique redundancy version number; in the memory, continuously and circularly selecting bits with the length being the sequence length after rate matching from the initial position selected by the bits to obtain the bits after rate matching of each code block; code block concatenation is carried out on the bits after each code block rate matching; modulating the bits after code block concatenation; the transmitter 223 is configured to transmit the modulated symbols in each of the bundled TTIs.

Optionally, the calculation formula for determining the number of bits that can be transmitted by the bundled TTI by the processor is as follows:

h ═ gxn, where,

h is the bits that the bundled TTI can transmit;

n is the number of bonded TTIs.

Optionally, the calculation formula that the processor determines the sequence length after rate matching according to the number of bits that can be transmitted by the bundled TTI is as follows:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' mod C, mod denotes a modulo operation;

G′＝H/(N_L×Q_m) H is the bits that the bundled TTI can transmit;

Q_mis a value corresponding to the modulation scheme.

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

Optionally, the transmitter is specifically configured to: and transmitting modulated symbols corresponding to H/N bits in each TTI, wherein H is data which can be transmitted by the bound TTI, and N is the number of the bound TTI.

Fig. 23 is a flowchart illustrating an embodiment of a bit receiving method according to the present invention, which includes:

step 231: a base station receives modulation symbols of the bundled TTI transmission;

step 232: and the base station processes the modulation symbol according to the unique redundancy version number.

Optionally, in step 232, the processing, by the base station, of the modulation symbol specifically includes:

demodulating to obtain a demodulated bit stream;

according to the sequence length E after rate matching of the code block with the calculated sequence number r_r' bit stream after demodulationSelecting the bit stream of the code block r, wherein r is more than or equal to 1 and less than or equal to C. Length E of the sequence after rate matching_rThe calculation method of' is described in detail in other embodiments of the present invention, and the same calculation method is adopted here and is not described again;

calculating a starting position k from a unique redundancy version number₀The bit stream of code block r is put into a buffer memory from position k of the buffer memory₀The insertion is started. The starting position k₀The calculation method is described in detail in other embodiments of the present invention, and the same calculation method is used here and is not described again. During initial transmission, the processor adopts the only redundancy version number of 0; or, in retransmission, the unique redundancy version number is 0, 1, 2 or 3;

performing subblock de-interleaving on the bits in the cache;

according to the TBS in the second table, calculating the size of information bits contained in a code block r, and according to the size of the information bits contained in the code block r, decoding the bits subjected to subblock de-interleaving to obtain the information bits of the code block r;

and after all the C code blocks are processed, obtaining the information bits with the size of the TBS in the second table.

Fig. 24 is a schematic structural diagram of a base station according to another embodiment of the present invention, which includes a receiver 241 and a processor 242; receiver 241 is configured to receive modulation symbols for bundled TTI transmissions and send the modulation symbols to the processor; processor 242 is configured to process the modulation symbols based on the unique redundancy version number.

Optionally, the processing, by the processor, the modulation symbol specifically includes:

demodulating to obtain a demodulated bit stream;

according to the sequence length E after rate matching of the code block with the calculated sequence number r_r' r is not less than 1 and not more than C, and the bit stream of the code block r is selected from the demodulated bit stream. Length E of the sequence after rate matching_rThe calculation method of' is described in detail in other embodiments of the present invention, and the same calculation method is adopted here and is not described again;

performing subblock de-interleaving on the bits in the cache;

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of data transmission, comprising:

determining the number of bits of data which can be transmitted by the bound subframes;

continuously and circularly selecting the data which can be transmitted by the bound subframes, specifically comprising:

determining the sequence length after rate matching according to the number of bits of data which can be transmitted by the bound sub-frame;

in the cache of the data stream after the cache sub-block interweaving, continuously and circularly selecting data with the length of the sequence after the rate matching from the initial position of the data selection;

and transmitting the data.

2. The method of claim 1, wherein the continuous loop is selected from a starting point indicated by RV 0.

3. The method of claim 2, further comprising:

4. The method of any of claims 1-3, wherein the unique redundancy version number is 0 at initial transmission; or, at retransmission, the unique redundancy version number is 0, 1, 2 or 3.

5. The method according to any one of claims 1 to 3, wherein the determining the length of the sequence after rate matching according to the number of bits of the data that can be transmitted in the bundled subframes comprises:

determining the length of the sequence after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' modC, mod represents a modulo operation;

G'＝H/(N_L×Q_m) H is data which can be transmitted by the bound subframes;

when transmission diversity is employed, N_L2, otherwise, N_LEqual to the number of layers to which one transport block is mapped;

Q_mis a value corresponding to the modulation mode;

wherein, the calculation formula of H is as follows:

H＝G×N，

g is the number of bits of the total available data for transmission of one transport block in one subframe;

n is the number of subframes that are bundled.

6. The method according to any of claims 1-3, wherein determining a starting position of a bit selection according to a unique redundancy version number comprises:

the starting position of the bit selection is determined according to the following calculation formula:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

7. A data transmission device, comprising:

the determining module is used for determining the number of bits of data which can be transmitted by the bound subframes;

a selecting module, configured to continuously and cyclically select data that can be transmitted by the bound subframes, where the selecting module is specifically configured to:

and the transmission module is used for transmitting the data.

8. The apparatus as claimed in claim 7, wherein the selection module continuously and cyclically selects the selected starting point as the position indicated by RV 0.

9. The apparatus of claim 8,

the transmission module is specifically configured to transmit data continuously and circularly selected from the position indicated by RV0 at initial transmission.

10. The apparatus according to any one of claims 7 to 9, wherein the unique redundancy version number adopted by the selection module is 0 at the time of initial transmission; or, when retransmitting, the unique redundancy version number adopted by the selection module is 0, 1, 2 or 3.

11. The device according to any one of claims 7 to 9, wherein the selecting module is specifically configured to determine the length of the sequence after rate matching according to the following calculation formula:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' modC, mod represents a modulo operation;

G'＝H/(N_L×Q_m) H is data which can be transmitted by the bound subframes;

Q_mis a value corresponding to the modulation mode;

wherein, the calculation formula of H is as follows:

H＝G×N，

n is the number of subframes that are bundled.

12. The device according to any one of claims 7 to 9, wherein the selecting module is specifically configured to determine a starting position of data selection according to the following calculation formula:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

13. A data transmission device, comprising:

the memory is used for storing data, and is particularly used for caching the data stream after the sub-blocks are interleaved;

a processor, configured to determine a bit number of data that can be transmitted by a bound subframe, and continuously and cyclically select, in the memory, the data that can be transmitted by the bound subframe, where the processor is specifically configured to: determining the sequence length after rate matching according to the bit number of the data which can be transmitted by the bound sub-frame, and determining the initial position of data selection according to the unique redundancy version number; in the memory, continuously and circularly selecting data with the length of the sequence after the rate matching from the initial position of the data selection;

the processor is further configured to read and execute instructions to cause the data transmission device to transmit the data.

14. The device of claim 13, wherein the processor is specifically configured to: the selected starting point for the continuous loop is the position indicated by RV 0.

15. The device of claim 14 wherein said processor is further configured to read and execute instructions causing said data transfer device to transfer data selected in a continuous loop from a location indicated by said RV0 at an initial transfer.

16. The device of any of claims 13-15, wherein the unique redundancy version number employed by the processor at initial transmission is 0; or, in retransmission, the unique redundancy version number adopted by the processor is 0, 1, 2 or 3.

17. The apparatus according to any of claims 13-15, wherein the processor is specifically configured to determine the length of the rate-matched sequence according to the following calculation:

if r is less than or equal to C-gamma-1, then

If not, then,

wherein E is_r' is the sequence length;

meaning that the rounding is done down,

represents rounding up;

g' modC, mod represents a modulo operation;

G'＝H/(N_L×Q_m) H is data which can be transmitted by the bound subframes;

Q_mis a value corresponding to the modulation mode;

wherein, the calculation formula of H is as follows:

H＝G×N，

n is the number of subframes that are bundled.

18. The apparatus according to any of claims 13-15, wherein the processor is specifically configured to determine a starting position of data selection according to the following calculation:

wherein k is₀Is the starting position;

is the number of rows of the matrix adopted when the subblocks are interleaved;

rv_idxis the unique redundancy version number.

19. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-6.