WO2018202057A1 - 传输数据的方法、基站和终端设备 - Google Patents

传输数据的方法、基站和终端设备 Download PDF

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Publication number
WO2018202057A1
WO2018202057A1 PCT/CN2018/085408 CN2018085408W WO2018202057A1 WO 2018202057 A1 WO2018202057 A1 WO 2018202057A1 CN 2018085408 W CN2018085408 W CN 2018085408W WO 2018202057 A1 WO2018202057 A1 WO 2018202057A1
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Prior art keywords
target
base matrix
terminal device
base
base station
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PCT/CN2018/085408
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English (en)
French (fr)
Inventor
马亮
曾歆
郑晨
魏岳军
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to KR1020197035193A priority Critical patent/KR102260943B1/ko
Priority to EP18794463.2A priority patent/EP3609101B1/en
Priority to JP2019560300A priority patent/JP6925450B2/ja
Priority to BR112019023128-5A priority patent/BR112019023128A2/pt
Publication of WO2018202057A1 publication Critical patent/WO2018202057A1/zh
Priority to US16/673,613 priority patent/US11101927B2/en
Priority to US17/389,004 priority patent/US11588576B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • H03M13/1148—Structural properties of the code parity-check or generator matrix
    • H03M13/116—Quasi-cyclic LDPC [QC-LDPC] codes, i.e. the parity-check matrix being composed of permutation or circulant sub-matrices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • H03M13/1148—Structural properties of the code parity-check or generator matrix
    • H03M13/118—Parity check matrix structured for simplifying encoding, e.g. by having a triangular or an approximate triangular structure
    • H03M13/1185—Parity check matrix structured for simplifying encoding, e.g. by having a triangular or an approximate triangular structure wherein the parity-check matrix comprises a part with a double-diagonal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
    • H03M13/255—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] with Low Density Parity Check [LDPC] codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/65—Purpose and implementation aspects
    • H03M13/6522—Intended application, e.g. transmission or communication standard
    • H03M13/6525—3GPP LTE including E-UTRA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H04L1/0058—Block-coded modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/63—Joint error correction and other techniques
    • H03M13/6306—Error control coding in combination with Automatic Repeat reQuest [ARQ] and diversity transmission, e.g. coding schemes for the multiple transmission of the same information or the transmission of incremental redundancy

Definitions

  • the present application relates to the field of communications and, more particularly, to a method of transmitting data, a base station, and a terminal device.
  • 5G Fifth-generation communication system
  • eMBB Enhanced Mobile Internet
  • Raptor-like LDPC Low Density Parity Check Code, LDPC
  • a Raptor-like LDPC base graph can encode a code block to be coded from 40 bits to 8192 bits in length, and the code rate ranges from 1 to 1. /5 to 8/9.
  • a Raptor-like LDPC base matrix there are some problems with covering a large range of code lengths and code rates through a Raptor-like LDPC base matrix. For example, it is impossible to balance the encoding and decoding performance of code blocks of different lengths, and it is impossible to achieve both high code rate and low code rate encoding and decoding performance.
  • the present application provides a method for transmitting data, a base station, and a terminal device, which can enable the encoded transport block to meet the requirements of actual services.
  • an embodiment of the present application provides a method for transmitting data, where the method includes: determining, by a base station, a target base matrix from N Raptor-like low density parity check LDPC basis matrices, where the first base matrix and the second base The matrix is any two Raptor-like LDPC base matrices of the N Raptor-like LDPC base matrices, and the first base matrix and the second base matrix comprise different numbers of information bit columns, and the code supported by the first base matrix The intersection of the length and the code length supported by the second base matrix is not empty, and the intersection of the code rate supported by the first base matrix and the code rate supported by the second base matrix is not empty, and N is a positive value greater than or equal to 2.
  • the base station sends the indication information to the terminal device, where the indication information is used to indicate that the terminal device performs LDPC encoding and decoding using the target base matrix.
  • the base station may determine a target base matrix from a plurality of Raptor-like LDPC base matrices that can be used for LDPC encoding and decoding, and indicate the target base matrix to the terminal device. Further, for the same code rate or the same code block length, the base station can select different base matrices according to requirements.
  • the base station sends the indication information to the terminal device, including: the base station, according to the correspondence between the modulation coding policy MCS index and the base matrix, from at least N MCSs Determining, in the index, a target MCS index corresponding to the target base matrix; the base station sends the target MCS index to the terminal device, where the target MCS index is the indication information.
  • the base station can carry the indication information using the MCS index in the existing signaling. Therefore, the above technical solution can indicate the determined target base matrix to the terminal device without increasing signaling overhead and changing the signaling structure.
  • the MCS table includes the at least N MCS indexes, and each of the at least N MCS indexes corresponds to the N Raptor-like LDPC base matrix A Raptor-like LDPC base matrix, each of the at least N MCS indexes further corresponding to at least one of a modulation order and a transport block size index.
  • the target base matrix can be related to the size of the transport block. Therefore, the target base matrix and the corresponding transport block size index can be simultaneously indicated to the terminal device by using the MCS index.
  • the method further includes: the base station, according to the requirement information, from the at least two extension factor groups Determining a target extension factor group, wherein each of the at least two extension factor groups includes a plurality of expansion factors, wherein the requirement information includes a type of the terminal device, a throughput requirement, a delay requirement, and an initial transmission code.
  • the base station determines a target spreading factor from a plurality of spreading factors included in the target spreading factor group according to a code length of the code block to be encoded; the base station according to the target spreading factor and the The target base matrix performs LDPC encoding on the code block to be encoded.
  • Different requirements and different Hybrid Automatic Repeat Request (HARQ) performance can be adapted by selecting an appropriate spreading factor.
  • HARQ Hybrid Automatic Repeat Request
  • the method further includes: the base station determining, according to the demand information, a target extension factor group from the at least two extension factor groups, where each of the at least two extension factor groups includes a plurality of expansion factors, where the requirement information includes the At least one of a type of the terminal device, a throughput requirement, a delay requirement, a size of the initial transmission code rate, and a service type; the base station extracts multiple extensions from the target extension factor group according to a code length of the code block to be encoded Determining a target spreading factor in the factor; the base station receives the code block sent by the terminal device, where the code block sent by the terminal device is that the terminal device performs LDPC encoding on the code block to be encoded according to the target spreading factor and the target base matrix. The base station performs LDPC decoding on the received code block according to the target spreading factor and the target base matrix
  • the column of the second base matrix is a subset of the columns of the first base matrix. In this way, the storage space for storing the Raptor-like LDPC base matrix can be reduced.
  • the embodiment of the present application provides a method for transmitting data, where the method includes: receiving, by a terminal device, indication information sent by a base station; and determining, by the terminal device, performing low-density parity check code LDPC coding according to the indication information.
  • a decoded target base matrix wherein the target base matrix belongs to N Raptor-like LDPC base matrices, wherein the first base matrix and the second base matrix are any two Raptor-like LDPCs of the N Raptor-like LDPC base matrices a base matrix, the first base matrix and the second base matrix comprise different number of information bit columns, and an intersection of a code length supported by the first base matrix and a code length supported by the second base matrix is not empty, the first The intersection of the code rate supported by the base matrix and the code rate supported by the second base matrix is not empty, and N is a positive integer greater than or equal to 2.
  • the receiving, by the terminal device, the indication information sent by the base station includes: receiving, by the terminal device, a target modulation and coding policy MCS index sent by the base station, where the target MCS The index is the indication information.
  • the terminal device determines, according to the indication information, a target base matrix for performing LDPC encoding and decoding, and the terminal device determines, according to the correspondence between the MCS index and the base matrix, the index corresponding to the target MCS index.
  • the base matrix is the target base matrix.
  • the terminal device receives the indication information sent by the base station, where the terminal device receives the target modulation sent by the base station An encoding policy MCS index, where the target MCS index is the indication information; the terminal device determines, according to the indication information, a target base matrix for performing LDPC encoding and decoding, including: the correspondence between the MCS index and the base matrix by the terminal device And determining a base matrix corresponding to the target MCS index as the target base matrix. Therefore, the target base matrix and the corresponding transport block size index can be simultaneously acquired by using the MCS index.
  • the method further includes: the terminal device, according to the requirement information, from the at least two expansion factors Determining a target extension factor group in the group, wherein each of the at least two extension factor groups includes a plurality of expansion factors, wherein the requirement information includes a type of the terminal device, a throughput requirement, a delay requirement, and an initial transmission.
  • the terminal device determines a target spreading factor from a plurality of spreading factors included in the target spreading factor group according to a code length of the code block to be encoded; the terminal device expands according to the target The factor and the target base matrix are LDPC-encoded for the code block to be encoded. Different requirements and different HARQ performance can be adapted by selecting an appropriate spreading factor.
  • the fourth possible implementation of the second aspect further includes: determining, by the terminal device, the target extension factor group from the at least two extension factor groups according to the requirement information, where each of the at least two expansion factor groups includes multiple expansion factors, where
  • the demand information includes at least one of a type of the terminal device, a throughput requirement, a delay requirement, a size of an initial transmission code rate, and a service type.
  • the terminal device selects a target expansion factor group according to a code length of the code block to be encoded.
  • the terminal device receives the code block sent by the base station, where the code block sent by the base station is the base station according to the target spreading factor and the target base matrix Performing LDPC coding; the base station performs LDPC decoding on the received code block according to the target spreading factor and the target base matrix.
  • Different requirements and different HARQ performance can be adapted by selecting an appropriate spreading factor.
  • the column of the second base matrix is a subset of the columns of the first base matrix. In this way, the storage space for storing the Raptor-like LDPC base matrix can be reduced.
  • the embodiment of the present application provides a base station, where the base station includes a unit for performing the first aspect or any possible implementation manner of the first aspect.
  • the embodiment of the present application provides a terminal device, where the terminal device includes a unit for performing the second aspect or any possible implementation manner of the second aspect.
  • an embodiment of the present application provides a base station, where the base station includes a memory, a transceiver, and a processor, where the memory stores instructions for implementing the first aspect or any possible implementation manner of the first aspect, the processor The memory stored instructions are executed in conjunction with the transceiver.
  • the embodiment of the present application provides a terminal device, where the terminal device includes a memory, a transceiver, and a processor, where the memory stores an instruction for implementing the second aspect or any possible implementation manner of the second aspect, where The processor, in conjunction with the transceiver, executes the instructions stored by the memory.
  • the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions, when the instructions are run on a computer, causing the computer to execute the method described in the above aspects. .
  • an embodiment of the present application provides a computer program product comprising instructions, when the computer program product is run on a computer, causing the computer to perform the method described in the above aspects.
  • Figure 1 is a schematic diagram of a Raptor-like LDPC matrix.
  • FIG. 2 is a schematic flowchart of a method for transmitting data according to an embodiment of the present application.
  • FIG. 3 is a structural block diagram of a base station according to an embodiment of the present application.
  • FIG. 4 is a structural block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 5 is a structural block diagram of a base station according to an embodiment of the present application.
  • FIG. 6 is a structural block diagram of a terminal device according to an embodiment of the present application.
  • Raptor-like LDPC matrices employed for encoding and decoding a communication system, for example: the fifth generation (5 th generation, 5G) network, a new air interface (new radio, NR )Wait.
  • 5G fifth generation
  • NR new air interface
  • the wireless transmission device referred to in the embodiment of the present application may include a terminal device and a network device.
  • the terminal device referred to in the technical solution of the embodiment of the present application may also be referred to as an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a mobile device.
  • UE user equipment
  • the terminal device can communicate with one or more core networks via a radio access network (RAN), or can access the distributed network in an ad hoc or unlicensed manner, and the terminal device can also access through other means.
  • RAN radio access network
  • the wireless network communicates, and the terminal device can directly perform wireless communication with other terminal devices. This embodiment of the present application does not limit this.
  • the network device referred to in the embodiment of the present application may be a base station (node B), an evolved base station (evolutional node B, eNB), a base station in a communication system, a base station or a network device in a future communication system, and the like.
  • node B node B
  • eNB evolved base station
  • a base station in a communication system a base station or a network device in a future communication system, and the like.
  • the data sent by the data link layer to the physical layer is in the form of a transport block (TB).
  • TB transport block
  • CRC Cyclic Redundancy Check
  • the input length supported by the encoder is limited.
  • the TB length to which the CRC check bit is added may be greater than the input length supported by the encoder. In this case, it is necessary to perform code block division on the TB to which the CRC check bit is added.
  • the code block segmentation is to divide the transport block after adding the CRC check bit into a plurality of code blocks (CBs) matching the input length supported by the encoder for the encoder to encode.
  • the TB length to which the CRC check bit is added may be less than the length supported by the encoder, which is the length that can be matched to the input length supported by the encoder by padding the bits.
  • the code block to be encoded referred to in the embodiment of the present application refers to a code block input into the encoder.
  • a CRC check bit may be added to the CB after the code block is split, and the CB input encoder to which the CRC check bit is added will be included.
  • the CB to which the CRC check bit is added is the code block to be coded or the LDPC code block to be referred to in the embodiment of the present application.
  • Figure 1 is a schematic diagram of a Raptor-like LDPC matrix.
  • the Raptor-like LDPC matrix can be divided into five parts.
  • A, B, C, D, and E shown in Fig. 1 represent five parts of the Raptor-like LDPC matrix, respectively.
  • Matrix A can be referred to as a Raptor-like LDPC base matrix, corresponding to the information bit portion of the code block.
  • At least one column of the matrix B has a column weight of 3, and a column with a column weight of 3 has a double diagonal structure on the right side.
  • the matrix C is an all-zero matrix.
  • the matrix E is a unit diagonal matrix.
  • the form of the D part of the matrix is not limited.
  • FIG. 2 is a schematic flowchart of a method for transmitting data according to an embodiment of the present application.
  • the base station determines a target base matrix from the N Raptor-like LDPC basis matrices, where N is a positive integer greater than or equal to 2.
  • the first base matrix and the second base matrix are any two Raptor-like LDPC base matrices of the N Raptor-like LDPC base matrices.
  • the information included in the first base matrix and the second base matrix is different in the number of columns.
  • the intersection of the code length supported by the first base matrix and the code length supported by the second base matrix is not empty, and the intersection of the code rate supported by the first base matrix and the code rate supported by the second base matrix is not empty.
  • the base station can determine the target base matrix according to the needs of the current service, such as delay priority or performance priority. For example, in a performance-first selection method, the optimal decoding performance at the time of initial transmission can be preferentially guaranteed. At this time, the base station pre-records the matrix with the best performance in the encoder pre-stored matrix under different input block lengths and different initial code rates. The base station can select an optimal Raptor-like LDPC base matrix as the target base matrix according to the actual code length and code rate. In another delay-prioritized matrix selection mode, the base station can select a matrix according to different actual service requirements for delay requirements. When the service demand is small, the base station may determine that the Raptor-like LDPC base matrix with a small number of information bits is used as the target base matrix.
  • the base station can also determine the target base matrix according to other selection conditions.
  • the base station may further determine the current service type, such as Enhanced Mobile Broadband (eMBB), Ultra Reliable and Low Latency Communication (uRLLC), and the like.
  • eMBB Enhanced Mobile Broadband
  • uRLLC Ultra Reliable and Low Latency Communication
  • the column of the second base matrix is a subset of the columns of the first base matrix.
  • the first base matrix includes K columns.
  • the second base matrix may comprise a K' column, K' being a positive integer less than K.
  • the first column to the kth column in the K' column are the first column to the kth column in the K column, and the k+1th column to the Kth column in the K' column are the first in the K column.
  • k is a positive integer greater than one.
  • the first base matrix includes 32 columns
  • the second base matrix includes 16 columns.
  • the first column to the tenth column of the second base matrix may be the first column to the tenth column of the first base matrix.
  • the 11th column to the 16th column of the second base matrix are the 27th column to the 32nd column of the first base matrix.
  • k can be equal to K'-1.
  • the first base matrix includes 32 columns
  • the second base matrix includes 16 columns.
  • the first column to the 15th column of the second base matrix may be the first column to the 15th column of the first base matrix.
  • the 16th column of the second base matrix is the 32nd column of the first base matrix.
  • the base station sends indication information to the terminal device, where the indication information is used to indicate that the terminal device performs LDPC encoding and decoding using the target base matrix.
  • the terminal device determines the target base matrix according to the indication information.
  • the base station may determine, according to a correspondence between a Modulation and Coding Scheme (MCS) index and a base matrix, a target MCS corresponding to the target base matrix from at least N MCS indexes. index.
  • MCS Modulation and Coding Scheme
  • the base station can send the target MCS index to the terminal device.
  • the target MCS index is the indication information.
  • the correspondence between the MCS index and the base matrix can be expressed as an MCS table.
  • the MCS table includes the at least N MCS indexes, and each of the at least N MCS indexes corresponds to one Raptor-like LDPC base matrix of the N Raptor-like LDPC base matrices.
  • Each of the at least N MCS indexes may also correspond to at least one of a modulation order and a transport block size index.
  • Different target base matrices for LDPC coding often support different code rates and code length ranges. For example, larger Raptor-Like LDPC base matrices tend to be more suitable for supporting longer code lengths and higher code rates. Smaller Raptor-Like LDPC base matrices usually only support smaller code lengths and lower bit rates. .
  • the MCS determines the corresponding transport block size and modulation order to determine the code length and code rate, so that the target base matrix information can be determined; for those multiple matrices Commonly supported block length and code rate, according to different selection strategies, the target base matrix and the corresponding transport block size index may be simultaneously indicated to the terminal device by using the MCS index.
  • the base station may determine a corresponding MCS index according to the target base matrix. Specifically, the base station may receive channel environment information, such as a channel quality indicator (CQI), sent by the terminal device.
  • CQI channel quality indicator
  • the base station may determine a plurality of candidate MCS indexes according to the CQI. The modulation order and the transport block size index indicated by these candidate MCS indexes correspond to the CQI.
  • the base matrices indicated by these candidate MCS indexes are different.
  • the base station may determine, according to the determined target base matrix, an MCS index indicating the base matrix from the candidate MCS index, and send the determined MCS index to the terminal device.
  • the terminal device may determine a target base matrix corresponding to the received target MCS index according to the correspondence between the MCS index and the base matrix.
  • Table 1 is a schematic diagram of an MCS table.
  • the number of Raptor-like LDPC basis matrices in the MCS table as shown in Table 1 is 2. It is assumed that the base station can determine to adopt the MCS index 0 and the MCS index 1 according to the CQI reported by the terminal device, because the modulation order and the transport block size corresponding to the two MCS indexes conform to the CQI. If the base station determines that the target base matrix is 2, the base station may send the MCS index 1 to the terminal device. The terminal device may determine to use the base matrix 2 as the target base matrix according to the received MCS index.
  • the base station may send control information to the terminal device, where the control information includes the indication information.
  • the control information may be Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the DCI can display the indication information in a displayed manner. For example, a field may be added to the DCI that includes at least one bit. This field can be used to carry the indication information.
  • the terminal device can determine the target base matrix according to the field.
  • the DCI can also carry the indication information implicitly.
  • N fields representing N Raptor-like LDPC basis matrices may be defined.
  • the base station may XOR the field corresponding to the target base matrix and the specified field in the DCI.
  • the terminal device may XOR the specified field and the N fields respectively.
  • the DCI may pass the loop check only when the terminal device and the base station use the same field for XOR.
  • the terminal device may determine a Raptor-like LDPC base matrix corresponding to a field that enables the DCI to pass the loop check as the target LDPC base matrix.
  • the code length of each code block to be encoded may correspond to one spreading factor.
  • the wireless transmission device as the transmitting end device may determine the target spreading factor according to the code length of the code block to be encoded, and then perform LDPC encoding on the code length of the code block to be encoded according to the target base matrix and the target spreading factor.
  • the wireless transmission device as the receiving device can directly acquire the target spreading factor from the transmitting device.
  • the receiving end device may also determine the target spreading factor according to the code length of the code block to be encoded, and then perform LDPC decoding on the received information according to the target spreading factor and the target base matrix.
  • the code length of the code block to be encoded may be sent by the sending end to the receiving end device or may be determined by the receiving end device.
  • the correspondence between the code length of the code block to be encoded and the spreading factor is stored in the wireless transmission device. Moreover, it can be understood that the correspondence between the code length and the spreading factor of the code block to be encoded saved by the base station and the terminal device is the same.
  • the wireless transmission device as the source device may determine, according to the requirement information, a target extension factor group from the at least two extension factor groups, where each of the at least two extension factor groups
  • the expansion factor group includes a plurality of expansion factors, wherein the requirement information includes at least one of a type of the terminal device, a throughput requirement, a delay requirement, a size of the initial transmission code rate, and a service type.
  • the transmitting end device may determine a target spreading factor from a plurality of spreading factors included in the target spreading factor group according to a code length of the code block to be encoded.
  • the transmitting end device may perform LDPC encoding on the code block to be encoded according to the target spreading factor and the target base matrix.
  • the wireless transmission device as the receiving end device may also determine a target spreading factor group from the at least two spreading factor groups according to the demand information, and then, according to the code length of the to-be-coded code block, from the target spreading factor group.
  • the target spreading factor is determined among the plurality of spreading factors included, and the received code block is LDPC-decoded according to the target spreading factor and the target base matrix. It can be understood that the sending end device and the receiving end device determine that the rule of the target spreading factor is the same, so that the receiving end device can correctly decode.
  • the sender device transmits the length of the transport block to the sink device.
  • the receiving end may determine the code length of the code block to be encoded according to a preset code block segmentation rule.
  • the code block received by the receiving end device is obtained by the transmitting end device by performing LDPC encoding on the code block to be encoded according to the target spreading factor and the target base matrix.
  • the code block segmentation rule used by the receiving device is the same as the code block segmentation rule used by the transmitting device. Therefore, the code length of the code block to be encoded determined by the receiving end device is the same as the code length of the code block to be encoded determined by the source device.
  • Each of the plurality of spreading factors included in the at least two spreading factor groups may correspond to a code length of a code block to be encoded.
  • the spreading factors of the same code length of the code block to be coded may be different in different spreading factor groups.
  • the expansion factor included in the expansion factor group is preset.
  • the correspondence between the code length and the spreading factor of the code block to be encoded and the at least two extension factor groups are stored in the wireless transmission device. It can be understood that the base station and the terminal device hold the extension factor group, and the correspondence between the code length and the spreading factor of the code block to be coded is the same.
  • the setting of the expansion factor group may be corresponding to the requirement information. Assume that the number of expansion factor groups is two. The first set of spreading factors in the two spreading factor groups is suitable for encoding with higher latency requirements, and the second set of spreading factors is suitable for encoding of general delay requirements. In this way, if the source device determines that the delay requirement of the encoding is high, it may be determined that the first group of spreading factors is the target spreading factor group. Similarly, the extension factor group can also be divided according to different service types, terminal equipment types, throughput requirements, initial transmission rate, and the like. Of course, different sets of expansion factors can also correspond to different demand information. For example, one set of expansion factors is suitable for coding with higher latency requirements, and another set of expansion factors is suitable for coding with higher throughput requirements.
  • the initial transmission rate which may also be referred to as the first transmission rate, the first transmission rate, the initial transmission rate, etc., refers to the rate matching of the LDPC coded code block to the receiving device for the first time.
  • the transmission code rate of the coded block after transmission.
  • the base station may determine a target base matrix from a plurality of Raptor-like LDPC base matrices that can be used for LDPC encoding, and indicate the target base matrix to the terminal device. Further, for the same code rate or the same code length, the base station can select different base matrices according to requirements.
  • the plurality of Raptor-like LDPC base matrices can also support different code rates and code lengths. This can increase the range of supported bit rates and code lengths.
  • FIG. 3 is a structural block diagram of a base station according to an embodiment of the present application.
  • the base station 300 includes a storage unit 301, a processing unit 302, and a transmitting unit 303.
  • the storage unit 301 is configured to store N Raptor-like LDPC base matrices.
  • the processing unit 302 is configured to determine a target base matrix from the N Raptor-like LDPC base matrices stored by the storage unit 301, where the first base matrix and the second base matrix are any of the N Raptor-like LDPC base matrices Two Raptor-like LDPC basis matrices, the first base matrix and the second base matrix comprise different number of columns, and the intersection of the code length supported by the first base matrix and the code length supported by the second base matrix is not empty The intersection of the code rate supported by the first base matrix and the code rate supported by the second base matrix is not null, and N is a positive integer greater than or equal to 2.
  • the sending unit 303 is configured to send, to the terminal device, indication information, where the indication information is used to indicate that the terminal device performs LDPC encoding and decoding using the target base matrix.
  • the base station 300 shown in FIG. 3 can determine a target base matrix from a plurality of Raptor-like LDPC base matrices that can be used for LDPC encoding and decoding, and indicate the target base matrix to the terminal device. Further, for the same code rate or the same code length, the base station 300 can select different base matrices according to requirements.
  • the storage unit 301 can be implemented by a memory
  • the processing unit 302 can be implemented by a processor
  • the transmitting unit 303 can be implemented by a transmitter.
  • the base station 300 may further include a receiving unit, where the receiving unit may be configured to receive a code block sent by the terminal device.
  • the receiving unit can be implemented by a receiver.
  • FIG. 4 is a structural block diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 400 shown in FIG. 4 includes a storage unit 401, a receiving unit 402, and a processing unit 403.
  • the storage unit 401 is configured to store N Raptor-like LDPC base matrices.
  • the receiving unit 402 is configured to receive indication information sent by the base station.
  • the processing unit 403 is configured to determine, according to the indication information, a target base matrix for performing LDPC encoding and decoding, where the target base matrix belongs to the N Raptor-like LDPC base matrices stored by the storage unit 401, where the first base matrix And the second base matrix is any two Raptor-like LDPC base matrices of the N Raptor-like LDPC base matrices, the first base matrix and the second base matrix comprise different number of columns, the first base matrix supports The intersection of the code length and the code length supported by the second base matrix is not empty, and the intersection of the code rate supported by the first base matrix and the code rate supported by the second base matrix is not empty, and N is greater than or equal to 2. Positive integer.
  • the storage unit 401 can be implemented by a memory
  • the receiving unit 402 can be implemented by a receiver
  • the processing unit 403 can be implemented by a processor.
  • FIG. 5 is a structural block diagram of a base station according to an embodiment of the present application.
  • the base station 500 shown in FIG. 5 includes a processor 501, a memory 502, and a transceiver circuit 503.
  • bus system 504 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • bus system 504 various buses are labeled as bus system 504 in FIG.
  • Processor 501 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 501 or an instruction in a form of software.
  • the processor 501 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc. In the storage medium.
  • the storage medium is located in the memory 502.
  • the processor 501 reads the instructions in the memory 502 and combines the transceiver circuit 503 to complete the steps of the above method.
  • FIG. 6 is a structural block diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 600 shown in FIG. 6 includes a processor 601, a memory 602, and a transceiver circuit 603.
  • bus system 604 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • bus system 604 various buses are labeled as bus system 604 in FIG.
  • Processor 601 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 601 or an instruction in a form of software.
  • the processor 601 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc. In the storage medium.
  • the storage medium is located in the memory 602.
  • the processor 601 reads the instructions in the memory 602 and combines the transceiver circuit 603 to complete the steps of the above method.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a Solid State Disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium eg, a Solid State Disk (SSD)

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Abstract

本申请提供一种传输数据的方法、基站和终端设备，该方法包括：基站从N个Raptor-like LDPC基矩阵中确定目标基矩阵；该基站向终端设备发送指示信息，该指示信息用于指示该终端设备使用该目标基矩阵进行LDPC编码和解码。基于上述技术方案，基站可以从多个可以用于进行LDPC编码和解码的Raptor-like LDPC基矩阵中确定出一个目标基矩阵，并将该目标基矩阵指示给该终端设备。进一步，对于同一个码率或同一个码长，该基站可以根据需求选择不同的基矩阵。

Description

传输数据的方法、基站和终端设备
本申请要求于2017年05月04日提交中国专利局、申请号为201710307430.1、申请名称为“传输数据的方法、基站和终端设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及传输数据的方法、基站和终端设备。
背景技术
第五代通信系统(5 th Generation，5G)增强型移动互联网(Enhance Mobile Broadband，eMBB)场景已确定采用Raptor-like低密度奇偶校验码(Low Density Parity Check Code，LDPC)作为数据信道编码。
以5G通信系统可能采用的Raptor-like LDPC基矩阵为例，一个Raptor-like LDPC基矩阵(base graph)可以对长度从40比特到8192比特的待编码码块进行编码，编码码率范围从1/5到8/9。但是，通过一个Raptor-like LDPC基矩阵覆盖如此大范围的码长和码率，存在一些问题。例如，无法兼顾不同长度的码块的编码和解码性能，无法兼顾高码率和低码率的编码和解码性能等。
发明内容
本申请提供一种传输数据的方法、基站和终端设备，能够使得编码后的传输块满足实际业务的需求。
第一方面，本申请实施例提供一种传输数据的方法，该方法包括：基站从N个Raptor-like低密度奇偶校验LDPC基矩阵中确定目标基矩阵，其中第一基矩阵和第二基矩阵为该N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，该第一基矩阵和该第二基矩阵包含的信息位列数不同，该第一基矩阵支持的码长和该第二基矩阵支持的码长的交集不为空，该第一基矩阵支持的码率与该第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数；该基站向终端设备发送指示信息，该指示信息用于指示该终端设备使用该目标基矩阵进行LDPC编码和解码。基于上述技术方案，基站可以从多个可以用于进行LDPC编码和解码的Raptor-like LDPC基矩阵中确定出一个目标基矩阵，并将该目标基矩阵指示给该终端设备。进一步，对于同一个码率或同一个码块长度，该基站可以根据需求选择不同的基矩阵。
结合第一方面，在第一方面的第一种可能的实现方式中，该基站向终端设备发送指示信息，包括：该基站根据调制编码策略MCS索引与基矩阵的对应关系，从至少N个MCS索引中确定对应于该目标基矩阵的目标MCS索引；该基站向该终端设备发送该目标MCS索引，该目标MCS索引为该指示信息。该基站可以使用现有的信令中的MCS索引 携带该指示信息。因此，上述技术方案可以在不增加信令开销和改变信令结构的情况下将确定的目标基矩阵指示给该终端设备。
结合第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，
该MCS索引与基矩阵的对应关系表示为MCS表格，该MCS表格包括该至少N个MCS索引，该至少N个MCS索引中的每个MCS索引对应于该N个Raptor-like LDPC基矩阵中的一个Raptor-like LDPC基矩阵，该至少N个MCS索引中的每个MCS索引还对应于一个调制阶数和一个传输块大小索引中的至少一个。该目标基矩阵与传输块的大小可以是相关的。因此，可以利用MCS索引同时将该目标基矩阵和对应的传输块大小索引指示给该终端设备。
结合第一方面或第一方面的上述任一种可能的实现方式，在第一方面的第三种可能的实现方式中，该方法还包括：该基站根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中该至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中该需求信息包括该终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；该基站根据待编码码块的码长，从该目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；该基站根据该目标扩展因子和该目标基矩阵，对该待编码码块进行LDPC编码。通过选取合适的扩展因子可以适配不同的需求和不同的混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)性能。
结合第一方面或第一方面的第一种可能的实现方式或第二种可能的实现方式中的任一种可能的实现方式，在第一方面的第四种可能的实现方式中，该方法还包括：该基站根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中该至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中该需求信息包括该终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；该基站根据待编码码块的码长，从该目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；该基站接收该终端设备发送的码块，其中该终端设备发送的码块是该终端设备根据该目标扩展因子和该目标基矩阵对该待编码码块进行LDPC编码得到的；该基站根据该目标扩展因子和该目标基矩阵，对接收到的码块进行LDPC解码。通过选取合适的扩展因子可以适配不同的需求和不同的HARQ性能。
结合第一方面或第一方面的上述任一种可能的实现方式，在第一方面的第五种可能的实现方式中，该第二基矩阵的列是第一基矩阵的列的子集。这样，可以减少用于保存Raptor-like LDPC基矩阵的存储空间。
第二方面，本申请实施例提供一种传输数据的方法，该方法包括：终端设备接收基站发送的指示信息；该终端设备根据该指示信息，确定用于进行低密度奇偶校验码LDPC编码和解码的目标基矩阵，其中该目标基矩阵属于N个Raptor-like LDPC基矩阵，其中第一基矩阵和第二基矩阵为该N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，该第一基矩阵和该第二基矩阵包含的信息位列数不同，该第一基矩阵支持的码长和该第二基矩阵支持的码长的交集不为空，该第一基矩阵支持的码率与该第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数。
结合第二方面，在第二方面的第一种可能的实现方式中，该终端设备接收基站发送的指示信息，包括：该终端设备接收该基站发送的目标调制编码策略MCS索引，其中该 目标MCS索引为该指示信息；该终端设备根据该指示信息，确定用于进行LDPC编码和解码的目标基矩阵，包括：该终端设备根据MCS索引与基矩阵的对应关系，确定对应于该目标MCS索引的基矩阵为该目标基矩阵。上述技术方案可以在不增加信令开销和改变信令结构的情况下确定该目标基矩阵。
结合第二方面的第一种可能的实现方式中，在第二方面的第二种可能的实现方式中，该终端设备接收基站发送的指示信息，包括：该终端设备接收该基站发送的目标调制编码策略MCS索引，其中该目标MCS索引为该指示信息；该终端设备根据该指示信息，确定用于进行LDPC编码和解码的目标基矩阵，包括：该终端设备根据MCS索引与基矩阵的对应关系，确定对应于该目标MCS索引的基矩阵为该目标基矩阵。因此，可以利用MCS索引同时获取该目标基矩阵和对应的传输块大小索引。
结合第二方面或第二方面的上述任一种可能的实现方式，在第二方面的第三种可能的实现方式中，该方法还包括：该终端设备根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中该至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中该需求信息包括该终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；该终端设备根据待编码码块的码长，从该目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；该终端设备根据该目标扩展因子和该目标基矩阵，对该待编码码块进行LDPC编码。通过选取合适的扩展因子可以适配不同的需求和不同的HARQ性能。
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种可能的实现方式中的任一种可能的实现方式，在第二方面的第四种可能的实现方式中，该方法还包括：该终端设备根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中该至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中该需求信息包括该终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；该终端设备根据待编码码块的码长，从该目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；该终端设备接收该基站发送的码块，其中该基站发送的码块是该基站根据该目标扩展因子和该目标基矩阵对该待编码码块进行LDPC编码得到的；该基站根据该目标扩展因子和该目标基矩阵，对接收到的码块进行LDPC解码。通过选取合适的扩展因子可以适配不同的需求和不同的HARQ性能。
结合第二方面或第二方面的上述任一种可能的实现方式，在第二方面的第五种可能的实现方式中，该第二基矩阵的列是第一基矩阵的列的子集。这样，可以减少用于保存Raptor-like LDPC基矩阵的存储空间。
第三方面，本申请实施例提供一种基站，该基站包括用于执行第一方面或第一方面的任一种可能的实现方式的单元。
第四方面，本申请实施例提供一种终端设备，该终端设备包括用于执行第二方面或第二方面的任一种可能的实现方式的单元。
第五方面，本申请实施例提供一种基站，该基站包括存储器、收发器和处理器，该存储器存储用于实现第一方面或第一方面的任一种可能实现方式的指令，该处理器结合该收发器执行该存储器存储的指令。
第六方面，本申请实施例提供一种终端设备，该终端设备包括存储器、收发器和处 理器，该存储器存储用于实现第二方面或第二方面的任一种可能实现方式的指令，该处理器结合该收发器执行该存储器存储的指令。
第七方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令在计算机上运行时，使得计算机执行上述各个方面所述的方法。
第八方面，本申请实施例提供了一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述各方面所述的方法。
附图说明
图1是一个Raptor-like LDPC矩阵的示意图。
图2是根据本申请实施例提供的一种传输数据的方法的示意性流程图。
图3是根据本申请实施例提供的一种基站的结构框图。
图4是根据本申请实施例提供的一种终端设备的结构框图。
图5是根据本申请实施例提供的基站的结构框图。
图6是根据本申请实施例提供的终端设备的结构框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
应理解，本申请实施例的技术方案可以应用于各种采用Raptor-like LDPC矩阵进行编码和解码的通信系统，例如：第五代(5 th generation，5G)网络、新空口(new radio，NR)等。
本申请实施例中所称的无线传输设备可以包括终端设备和网络设备。
本申请实施例的技术方案中所称的终端设备也可以称为接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及未来5G网络中的终端设备。终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，或者可以通过自组织或免授权的方式接入分布式网络，终端设备还可以通过其它方式接入无线网络进行通信，终端设备也可以与其它终端设备直接进行无线通信，本申请的实施例对此不作限定。
本申请实施例中所称的网络设备可以是基站(node B)、演进型基站(evolutional node B，eNB)、通信系统中的基站、未来通信系统中的基站或网络设备等。
数据链路层发送给物理层处理的数据是以传输块(Transport Block，TB)为单位的，物理层拿到传输块后首先会给整个传输块添加循环冗余校验(Cyclic Redundancy Check，CRC)校验位，以增加TB的差错检测能力。编码器支持的输入长度是有限的。在一些情况下，添加了CRC校验位的TB长度可能大于编码器支持的输入长度。在此情况下，需要对添加了CRC校验位的TB进行码块分割。码块分割就是将添加了CRC校验位后的传输块，分割成多个与编码器支持的输入长度相匹配的编码块(Code Block，CB)，以便编码器编码。在一些情况下，添加了CRC校验位的TB长度可能小于该编码器支持的长度， 这是可以通过填充比特达到与编码器支持的输入长度相匹配长度。
本申请实施例中所称的待编码码块，是指输入到编码器中的码块。例如，在编码过程中，可能会在码块分割后的CB添加CRC校验位，将添加了CRC校验位的CB输入端编码器中。在这些实施例中，添加了CRC校验位的CB即为本申请实施例中所称的待编码码块或者待进行LDPC编码码块。
图1是一个Raptor-like LDPC矩阵的示意图。该Raptor-like LDPC矩阵可以划分为五个部分。图1所示的A、B、C、D、E分别表示该Raptor-like LDPC矩阵的五个部分。矩阵A可以称为Raptor-like LDPC基矩阵，对应码块的信息位部分。矩阵B部分至少有一列列重为3，列重为3的列右侧具有双对角结构。矩阵C为一全0矩阵。矩阵E是一个单位对角矩阵。矩阵D部分的形态不做限制。
图2是根据本申请实施例提供的一种传输数据的方法的示意性流程图。
201，基站从N个Raptor-like LDPC基矩阵中确定目标基矩阵，N为大于或等于2的正整数。第一基矩阵和第二基矩阵为该N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵。该第一基矩阵和该第二基矩阵包括的信息为列数不同。该第一基矩阵支持的码长和该第二基矩阵支持的码长的交集不为空，该第一基矩阵支持的码率与该第二基矩阵支持的码率的交集不为空。
该基站可以根据当前的业务的需求，例如时延优先还是性能优先，确定出该目标基矩阵。例如，在一种性能优先的选择方法中，可以优先保证初传时最优的译码性能。此时该基站预先记录了不同输入块长和不同初传码率下，编码器预存矩阵中性能最优的矩阵。该基站可以根据实际的码长和码率，选择最优的Raptor-like LDPC基矩阵作为该目标基矩阵。在另一种时延优先的矩阵选择方式中，该基站可以根据实际业务对时延需求的不同选择矩阵。当业务需求较小时延时，基站可以确定采用信息位列数较小的Raptor-like LDPC基矩阵为该目标基矩阵。
当然，该基站也可以根据其他选择条件确定出该目标基矩阵。例如，该基站还可以根据当前的业务类型，例如增强型移动互联网(Enhance Mobile Broadband，eMBB)、超高可靠性与超低时延通信(Ultra Reliable and Low Latency Communication，uRLLC)等，确定出该目标基矩阵。
可选的，在一些实施例中，该第二基矩阵的列是该第一基矩阵的列的子集。
更具体地，在一些实施例中，假设该第一基矩阵包括K列。该第二基矩阵可以包括K’列，K’为小于K的正整数。该K’列中的第一列至第k列为该K列中的第1列至第k列，该K’列中的第k+1列至第K’列为该K列中的第K-(K’-k-1)至第K列，其中K、K’和k均为正整数，且K’小于K，k小于K’。
可选的，在一些实施例中k为大于1的正整数。例如，该第一基矩阵包括32列，该第二基矩阵包括16列。该第二基矩阵的第一列至第10列可以为该第一基矩阵的第一列至第10列。该第二基矩阵的第11列至第16列为该第一基矩阵的第27列至第32列。
更进一步，在一些实施例中，k可以等于K’-1。例如，该第一基矩阵包括32列，该第二基矩阵包括16列。该第二基矩阵的第一列至第15列可以为该第一基矩阵的第一列至第15列。该第二基矩阵的第16列为该第一基矩阵的第32列。
202，该基站向终端设备发送指示信息，该指示信息用于指示该终端设备使用该目标 基矩阵进行LDPC编码和解码。
203，该终端设备根据该指示信息，确定该目标基矩阵。
可选的，在一些实施例中，该基站可以根据调制编码策略(Modulation and Coding Scheme，MCS)索引与基矩阵的对应关系，从至少N个MCS索引中确定对应于该目标基矩阵的目标MCS索引。该基站可以向该终端设备发送该目标MCS索引。该目标MCS索引为该指示信息。
该MCS索引与基矩阵的对应关系可以表示为MCS表格。该MCS表格包括该至少N个MCS索引，该至少N个MCS索引中的每个MCS索引对应于该N个Raptor-like LDPC基矩阵中的一个Raptor-like LDPC基矩阵。该至少N个MCS索引中的每个MCS索引还可以对应于一个调制阶数和一个传输块大小索引中的至少一个。
不同的用于进行LDPC编码的目标基矩阵往往支持不同的码率和码长范围。例如，较大的Raptor-Like LDPC基矩阵往往更适合支持较长的码长和较高的码率，较小的Raptor-Like LDPC基矩阵通常只支持较小的码长和较低的码率。对于那些由某个矩阵单独支持的块长和码率，利用MCS确定对应传输块大小和调制阶数也就确定了码长和码率，从而可以确定目标基矩阵的信息；对于那些多个矩阵共同支持的块长和码率，根据选择策略的不同，可以利用MCS索引同时将该目标基矩阵和对应的传输块大小索引指示给该终端设备
基站在确定了目标基矩阵后，可以根据该目标基矩阵确定出对应的MCS索引。具体地，基站可以接收终端设备发送的信道环境信息，例如信道环境指示(Channel Quality Indicator，CQI)。基站可以根据该CQI确定多个候选的MCS索引。这些候选的MCS索引所指示的调制阶数和传输块大小索引都对应于该CQI。并且，这些候选的MCS索引所指示的基矩阵是不同的。基站可以根据确定的目标基矩阵，从该候选的MCS索引中确定出指示该基矩阵的MCS索引并将确定出的MCS索引发送至该终端设备。该终端设备可以根据MCS索引与基矩阵的对应关系，确定对应于接收到的目标MCS索引的目标基矩阵。
表1是一个MCS表格的示意图。
Figure PCTCN2018085408-appb-000001
表1
如表1所示的MCS表格中Raptor-like LDPC基矩阵的数目为2。假设基站根据终端设备上报的CQI可以确定采用MCS索引0和MCS索引1，这是因为这两个MCS索引所对应的调制阶数和传输块大小符合该CQI。若该基站确定目标基矩阵为2，则该基站可以将MCS索引1发送至该终端设备。该终端设备可以根据接收到的MCS索引确定出使用基矩阵2作为该目标基矩阵。
可选的，在另一些实施例中，该基站可以向该终端设备发送控制信息，该控制信息中包括该指示信息。
可选的，在一些实施例中，该控制信息可以是下行控制信息(Downlink Control Information，DCI)。该DCI可以显示地携带该指示信息。例如，可以在DCI中增加一个字段，该字段包括至少一个比特。该字段可以用于携带该指示信息。该终端设备可以根据该字段确定该目标基矩阵。该DCI也可以隐式地携带该指示信息。例如，可以定义分别代表N个Raptor-like LDPC基矩阵的N个字段。基站可将目标基矩阵对应的字段和DCI中的指定字段异或。该终端设备可以将该指定字段与该N个字段分别进行异或。只有当终端设备和基站采用了相同字段进行异或时，该DCI才可能通过循环校验。该终端设备可以确定能够使得DCI通过循环校验的字段对应的Raptor-like LDPC基矩阵为该目标LDPC基矩阵。
可选的，在一些实施例中，每个待编码码块的码长可以对应于一个扩展因子。作为发送端设备的无线传输设备可以根据待编码码块的码长确定出目标扩展因子，然后根据该目标基矩阵和该目标扩展因子对该待编码码块的码长进行LDPC编码。作为接收端设备的无线传输设备可以直接从该发送端设备获取该目标扩展因子。该接收端设备也可以根据待编码码块的码长确定出该目标扩展因子，然后根据该目标扩展因子和该目标基矩阵对接收到的信息进行LDPC解码。该待编码码块的码长可以是发送端发送给该接收端设备的也可以该接收端设备确定的。该待编码码块的码长和扩展因子的对应关系保存在无线传输设备中。并且，可以理解的是，基站和终端设备保存的待编码码块的码长和扩展因子的对应关系是相同的。
可选的，在另一些实施例中，作为发送端设备的无线传输设备可以根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中该至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中该需求信息包括终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个。该发送端设备可以根据待编码码块的码长，从该目标扩展因子组中包括的多个扩展因子中确定目标扩展因子。该发送端设备可以根据该目标扩展因子和该目标基矩阵，对该待编码码块进行LDPC编码。类似的，作为接收端设备的无线传输设备也可以根据需求信息，从该至少两个扩展因子组中确定目标扩展因子组，然后根据该待编码码块的码长，从该目标扩展因子组中包括的多个扩展因子中确定该目标扩展因子，根据该目标扩展因子和该目标基矩阵对接收到的码块进行LDPC解码。可以理解的，该发送端设备和该接收端设备确定该目标扩展因子的规则是相同的，这样该接收端设备才能正确解码。此外，发送端设备会将传输块的长度发送给接收端设备。接收端可以根据预设的码块分割规则，确定待编码码块的码长。该接收端设备接收到的码块是发送端设备可以根据该目标扩展因子和该目标基矩阵对该待编码码块进行LDPC编码得到的。接收端设备所使用的码块分割规则与发送端设备所使用的码块分割规则相同。因此，接收端设备确定的待编码码块的码长与发送端设备确定的待编码码块的码长是相同的。
该至少两个扩展因子组包括的多个扩展因子中的每个扩展因子都可以对应于一个待编码码块的码长。同一个待编码码块的码长在不同的扩展因子组中所对应的扩展因子可能是不同的。扩展因子组中包括的扩展因子是预先设置的。该待编码码块的码长和扩展因子的对应关系以及该至少两个扩展因子组保存在无线传输设备中。可以理解的是，基站和终 端设备保存扩展因子组，以及待编码码块的码长和扩展因子的对应关系是相同的。
扩展因子组的设定可以是与该需求信息对应的。假设扩展因子组的数目为2。两个扩展因子组中的第一组扩展因子适用于时延需求较高的编码，第二组扩展因子适用于一般时延需求的编码。这样，若该发送端设备确定编码的时延需求较高时，则可以确定该第一组扩展因子为该目标扩展因子组。类似的，扩展因子组也可以按照不同的业务类型、终端设备类型、吞吐率需求、初传码率等划分。当然，不同的扩展因子组也可以对应于不同的需求信息。例如，一组扩展因子适用于时延需求较高的编码，另一组扩展因子适用于吞吐率需求较高的编码。
初传码率，也可以称为第一次传送码率、第一次传输码率、初始传输码率等，是指对进行LDPC编码后的码块进行速率匹配后向接收端设备第一次发送编码后码块的传输码率。
基于上述技术方案，基站可以从多个可以用于进行LDPC编码的Raptor-like LDPC基矩阵中确定出一个目标基矩阵，并将该目标基矩阵指示给该终端设备。进一步，对于同一个码率或同一个码长，该基站可以根据需求选择不同的基矩阵。此外，该多个Raptor-like LDPC基矩阵也可以支持的不同的码率和码长。这样可以增加支持的码率和码长的范围。
图3是根据本申请实施例提供的一种基站的结构框图。如图3所示，基站300包括存储单元301、处理单元302和发送单元303。
存储单元301，用于存储N个Raptor-like LDPC基矩阵。
处理单元302，用于从存储单元301存储的该N个Raptor-like LDPC基矩阵中确定目标基矩阵，其中第一基矩阵和第二基矩阵为该N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，该第一基矩阵和该第二基矩阵包含的列数不同，该第一基矩阵支持的码长和该第二基矩阵支持的码长的交集不为空，该第一基矩阵支持的码率与该第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数。
发送单元303，用于向终端设备发送指示信息，该指示信息用于指示该终端设备使用该目标基矩阵进行LDPC编码和解码。
图3所示的基站300可以从多个可以用于进行LDPC编码和解码的Raptor-like LDPC基矩阵中确定出一个目标基矩阵，并将该目标基矩阵指示给该终端设备。进一步，对于同一个码率或同一个码长，基站300可以根据需求选择不同的基矩阵。
存储单元301可以由存储器实现，处理单元302可以由处理器实现，发送单元303可以由发送器实现。
此外，基站300还可以包括接收单元，该接收单元可以用于接收终端设备发送的码块。该接收单元可以由接收器实现。
基站300的各个单元的具体功能和有益效果可以参照图2所示方法，在此就不必赘述。
图4是根据本申请实施例提供的一种终端设备的结构框图。如图4所示的终端设备400包括存储单元401、接收单元402和处理单元403。
存储单元401，用于存储N个Raptor-like LDPC基矩阵。
接收单元402，用于接收基站发送的指示信息。
处理单元403，用于根据该指示信息，确定用于进行LDPC编码和解码的目标基矩 阵，其中该目标基矩阵属于存储单元401存储的该N个Raptor-like LDPC基矩阵，其中第一基矩阵和第二基矩阵为该N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，该第一基矩阵和该第二基矩阵包含的列数不同，该第一基矩阵支持的码长和该第二基矩阵支持的码长的交集不为空，该第一基矩阵支持的码率与该第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数。
存储单元401可以由存储器实现，接收单元402可以由接收器实现，处理单元403可以由处理器实现。
终端设备400的各个单元的具体功能和有益效果可以参照图2所示方法，在此就不必赘述。
图5是根据本申请实施例提供的基站的结构框图。图5所示的基站500包括：处理器501、存储器502和收发电路503。
基站500中的各个组件通过总线系统504耦合在一起，其中总线系统504除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图5中将各种总线都标为总线系统504。
上述本申请实施例揭示的方法可以应用于处理器501中，或者由处理器501实现。处理器501可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器501中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器501可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read-Only Memory，ROM)、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器502，处理器501读取存储器502中的指令，结合其收发电路503完成上述方法的步骤。
图6是根据本申请实施例提供的终端设备的结构框图。图6所示的终端设备600包括：处理器601、存储器602和收发电路603。
终端设备600中的各个组件通过总线系统604耦合在一起，其中总线系统604除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图6中将各种总线都标为总线系统604。
上述本申请实施例揭示的方法可以应用于处理器601中，或者由处理器601实现。处理器601可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器601中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器601可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通 用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read-Only Memory，ROM)、可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器602，处理器601读取存储器602中的指令，结合其收发电路603完成上述方法的步骤。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
上述实施例可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)或者半导体介质(例如，固态硬盘(Solid State Disk，SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖 在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (24)

  1. 一种传输数据的方法，其特征在于，所述方法包括：
    基站从N个Raptor-like低密度奇偶校验LDPC基矩阵中确定目标基矩阵，其中第一基矩阵和第二基矩阵为所述N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，所述第一基矩阵和所述第二基矩阵包含的信息位列数不同，所述第一基矩阵支持的码长和所述第二基矩阵支持的码长的交集不为空，所述第一基矩阵支持的码率与所述第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数；
    所述基站向终端设备发送指示信息，所述指示信息用于指示所述终端设备使用所述目标基矩阵进行LDPC编码和解码。
  2. 如权利要求1所述的方法，其特征在于，所述基站向终端设备发送指示信息，包括：
    所述基站根据调制编码策略MCS索引与基矩阵的对应关系，从至少N个MCS索引中确定对应于所述目标基矩阵的目标MCS索引；
    所述基站向所述终端设备发送所述目标MCS索引，所述目标MCS索引为所述指示信息。
  3. 如权利要求2所述的方法，其特征在于，所述MCS索引与基矩阵的对应关系表示为MCS表格，所述MCS表格包括所述至少N个MCS索引，所述至少N个MCS索引中的每个MCS索引对应于所述N个Raptor-like LDPC基矩阵中的一个Raptor-like LDPC基矩阵，所述至少N个MCS索引中的每个MCS索引还对应于一个调制阶数和一个传输块大小索引中的至少一个。
  4. 如权利要求1至3中任一项所述的方法，其特征在于，所述方法还包括：
    所述基站根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述基站根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述基站根据所述目标扩展因子和所述目标基矩阵，对所述待编码码块进行LDPC编码。
  5. 如权利要求1至3中任一项所述的方法，其特征在于，所述方法还包括：
    所述基站根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述基站根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述基站接收所述终端设备发送的码块，其中所述终端设备发送的码块是所述终端设备根据所述目标扩展因子和所述目标基矩阵对所述待编码码块进行LDPC编码得到的；
    所述基站根据所述目标扩展因子和所述目标基矩阵，对接收到的码块进行LDPC解 码。
  6. 如权利要求1至5中任一项所述的方法，其特征在于，所述第二基矩阵的列是第一基矩阵的列的子集。
  7. 一种传输数据的方法，其特征在于，所述方法包括：
    终端设备接收基站发送的指示信息；
    所述终端设备根据所述指示信息，确定用于进行低密度奇偶校验码LDPC编码和解码的目标基矩阵，其中所述目标基矩阵属于N个Raptor-like LDPC基矩阵，其中第一基矩阵和第二基矩阵为所述N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，所述第一基矩阵和所述第二基矩阵包含的信息位列数不同，所述第一基矩阵支持的码长和所述第二基矩阵支持的码长的交集不为空，所述第一基矩阵支持的码率与所述第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数。
  8. 如权利要求7所述的方法，其特征在于，所述终端设备接收基站发送的指示信息，包括：
    所述终端设备接收所述基站发送的目标调制编码策略MCS索引，其中所述目标MCS索引为所述指示信息；
    所述终端设备根据所述指示信息，确定用于进行LDPC编码和解码的目标基矩阵，包括：
    所述终端设备根据MCS索引与基矩阵的对应关系，确定对应于所述目标MCS索引的基矩阵为所述目标基矩阵。
  9. 如权利要求8所述的方法，其特征在于，所述MCS索引与基矩阵的对应关系表示为MCS表格，所述MCS表格包括至少N个MCS索引，所述至少N个MCS索引中的每个MCS索引对应于所述N个Raptor-like LDPC基矩阵中的一个Raptor-like LDPC基矩阵，所述至少N个MCS索引中的每个MCS索引还对应于一个调制阶数和一个传输块大小索引中的至少一个。
  10. 如权利要求7至9中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述终端设备根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述终端设备根据所述目标扩展因子和所述目标基矩阵，对所述待编码码块进行LDPC编码。
  11. 如权利要求7至9中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述终端设备根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述终端设备接收所述基站发送的码块，其中所述基站发送的码块是所述基站根据 所述目标扩展因子和所述目标基矩阵对所述待编码码块进行LDPC编码得到的；
    所述基站根据所述目标扩展因子和所述目标基矩阵，对接收到的码块进行LDPC解码。
  12. 如权利要求7至11中任一项所述的方法，其特征在于，所述第二基矩阵的列是第一基矩阵的列的子集。
  13. 一种基站，其特征在于，包括：
    存储单元，用于存储N个Raptor-like低密度奇偶校验码LDPC基矩阵；
    处理单元，用于从所述存储单元存储的所述N个Raptor-like LDPC基矩阵中确定目标基矩阵，其中第一基矩阵和第二基矩阵为所述N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，所述第一基矩阵支持的码长和所述第二基矩阵支持的码长的交集不为空，所述第一基矩阵支持的码率与所述第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数；
    发送单元，用于向终端设备发送指示信息，所述指示信息用于指示所述终端设备使用所述目标基矩阵进行LDPC编码和解码。
  14. 如权利要求13所述的基站，其特征在于，所述处理单元，还用于根据调制编码策略MCS索引与基矩阵的对应关系，从至少N个MCS索引中确定对应于所述目标基矩阵的目标MCS索引；
    所述发送单元，具体用于向所述终端设备发送所述目标MCS索引，所述目标MCS索引为所述指示信息。
  15. 如权利要求13所述的基站，其特征在于，所述MCS索引与基矩阵的对应关系表示为MCS表格，所述MCS表格包括所述至少N个MCS索引，所述至少N个MCS索引中的每个MCS索引对应于所述N个Raptor-like LDPC基矩阵中的一个Raptor-like LDPC基矩阵，所述至少N个MCS索引中的每个MCS索引还对应于一个调制阶数和一个传输块大小索引中的至少一个。
  16. 如权利要求13至15中任一项所述的基站，其特征在于，所述处理单元，还用于根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述处理单元，还用于根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述处理单元，还用于根据所述目标扩展因子和所述目标基矩阵，对所述待编码码块进行LDPC编码。
  17. 如权利要求13至15中任一项所述的基站，其特征在于，所述处理单元，还用于根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述处理单元，还用于根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述基站还包括：
    接收单元，用于接收所述终端设备发送的码块，其中所述终端设备发送的码块是所述终端设备根据所述目标扩展因子和所述目标基矩阵对所述待编码码块进行LDPC编码得到的；
    所述处理单元，还用于根据所述目标扩展因子和所述目标基矩阵，对接收到的码块进行LDPC解码。
  18. 如权利要求13至17中任一项所述的基站，其特征在于，所述第二基矩阵的列是第一基矩阵的列的子集。
  19. 一种终端设备，其特征在于，包括：
    存储单元，用于存储N个Raptor-like低密度奇偶校验码LDPC基矩阵；
    接收单元，用于接收基站发送的指示信息；
    处理单元，用于根据所述指示信息，确定用于进行LDPC编码和解码的目标基矩阵，其中所述目标基矩阵属于所述存储单元存储的所述N个Raptor-like LDPC基矩阵，其中第一基矩阵和第二基矩阵为所述N个Raptor-like LDPC基矩阵中的任意两个Raptor-like LDPC基矩阵，所述第一基矩阵和所述第二基矩阵包含的信息位列数不同，所述第一基矩阵支持的码长和所述第二基矩阵支持的码长的交集不为空，所述第一基矩阵支持的码率与所述第二基矩阵支持的码率的交集不为空，N为大于或等于2的正整数。
  20. 如权利要求19所述的终端设备，其特征在于，所述接收单元，具体用于接收所述基站发送的目标调制编码策略MCS索引，其中所述目标MCS索引为所述指示信息；
    所述处理单元，具体用于根据MCS索引与基矩阵的对应关系，确定对应于所述目标MCS索引的基矩阵为所述目标基矩阵。
  21. 如权利要求20所述的终端设备，其特征在于，所述MCS索引与基矩阵的对应关系表示为MCS表格，所述MCS表格包括至少N个MCS索引，所述至少N个MCS索引中的每个MCS索引对应于所述N个Raptor-like LDPC基矩阵中的一个Raptor-like LDPC基矩阵，所述至少N个MCS索引中的每个MCS索引还对应于一个调制阶数和一个传输块大小索引中的至少一个。
  22. 如权利要求19至21中任一项所述的终端设备，其特征在于，所述处理单元，还用于根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述处理单元，还用于根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述处理单元，还用于根据所述目标扩展因子和所述目标基矩阵，对所述待编码码块进行LDPC编码。
  23. 如权利要求19至21中任一项所述的终端设备，其特征在于，所述处理单元，还用于根据需求信息，从至少两个扩展因子组中确定目标扩展因子组，其中所述至少两个扩展因子组中的每个扩展因子组包括多个扩展因子，其中所述需求信息包括所述终端设备的类型、吞吐率需求、时延需求、初传码率的大小和业务类型中的至少一个；
    所述处理单元，还用于根据待编码码块的码长，从所述目标扩展因子组中包括的多个扩展因子中确定目标扩展因子；
    所述接收单元，还用于接收所述基站发送的码块，其中所述基站发送的码块是所述基站根据所述目标扩展因子和所述目标基矩阵对所述待编码码块进行LDPC编码得到的；
    所述处理单元，还用于根据所述目标扩展因子和所述目标基矩阵，对接收到的码块进行LDPC解码。
  24. 如权利要求19至23中任一项所述的终端设备，其特征在于，所述第二基矩阵的列是第一基矩阵的列的子集。
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