WO2018127152A1 - 信息处理的方法、设备和通信系统 - Google Patents
信息处理的方法、设备和通信系统 Download PDFInfo
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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
- H04L1/0067—Rate matching
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- 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
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- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
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- 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
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- 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
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- 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
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1874—Buffer management
Definitions
- the embodiments of the present invention provide a method, a device, and a communication system for processing information, and the code blocks output after processing the input sequence can be adapted to the requirements of channel coding.
- the smallest code block is long.
- each of the code blocks includes a CRC bit segment
- the CRC bit segment is a school generated for an input bit segment in each of the code blocks.
- the bit segment is segmented, or the CRC bit segment is a check bit segment generated for the input bit segment and the padding bit segment in each of the code blocks.
- the code blocks G code block group comprising a group of at least one code block number of C 9, wherein,
- a fifth aspect provides a communication device, including:
- FIG. 4 is a schematic structural diagram of a code block according to another embodiment of the present invention.
- FIG. 5 is a schematic diagram of an information processing method according to another embodiment of the present invention.
- the communication system 100 includes a communication device 10 and a communication device 11, and control information or data information is received and transmitted between the communication device 10 and the communication device 11 as a sequence of information.
- the communication device 10 functions as a transmitting device, and transmits a sequence of information in accordance with a transmission block (TB), and a transport block CRC bit is added to each transport block.
- a transport block with a transport block CRC is added as an input sequence. If the length of the input sequence is less than the maximum code block length Z, padding bits may be added according to the code block length in the code block long set and then entered into the encoder for channel coding.
- K 3 That is to say, when (B+C ⁇ L) can divide C, the value of K 3 is equal to the value of (B+C ⁇ L)/C, and the rounding operation may not be performed for (B+C ⁇ L)/C. It can also be rounded up or rounded down without affecting the value of K 3 .
- the input bits and CRC bits included in the code block are also commonly referred to as valid information bits, and the number of valid information bits is a numerator for calculating the code block code rate.
- the number of valid information bits is a numerator for calculating the code block code rate.
- the length of the sequence output after encoding and rate matching of each code block is usually equal or equivalent, that is, the denominators of the calculated code block code rate are substantially equal, which results in a large difference in code rates between the code blocks, and these code blocks may cause The overall performance deteriorates when the system is encoded or decoded.
- the C code blocks belong to the G code block groups, and the number of code blocks including the CRC bit segment in each code block group is 1.
- the CRC bit segment may be the code block group.
- the check bit segment generated by the input bit segment in the at least one code block may also be a check bit segment generated in the input bit segment and the padding bit segment in at least one code block in the code block group.
- the effective information bit lengths included in each code block group after the grouping may be different by at most one.
- 902 Determine, according to one of the maximum code block group number G max or the maximum code block number M per code block group, the input sequence, and the maximum code block length Z in the code block long set, determine the number of code block groups G, and each code block. The number of code blocks in the group.
- each code block includes a length of K input bits is 7 segment or a length of 7 K
- the mixed segment that is, the number of code blocks whose mixed segment length is K 7 is C.
- the communication device 10 can also encode the C code blocks separately to obtain the coded code blocks.
- the communication device 10 can encode each code block according to the channel coding and coding method used by the system, that is, each output sequence c r0 , c r1 , c r2 , c r3 , ... in step 202.
- encoding is performed, for example, using LDPC encoding, or Polar encoding. This is not a limitation here.
- the communication device 10 After encoding the code block, the communication device 10 transmits the encoded code block to the receiving end.
- the communication device 11 receives the C coded code blocks transmitted by the communication device 10 and decodes them by the decoder to obtain C code blocks.
- the communication device 11 can determine the length of each code block, the length of the output bit segment in the code block, the length L of the CRC bit segment, and the length of the padding bit segment. For details, refer to the example of code block partitioning in each embodiment shown in FIG. 5-8, in which how to determine the number of code blocks, the code block length, and the length L of the CRC bit segment, and the padding bit length, where No longer.
- the communication device 11 acquires the output bit segments from the respective code blocks and then combines them to obtain an output sequence.
- the check determines that the output bit segment and the padding bit segment in the code block are correct, and the communication device 11 further outputs the output bit segment. Merging with other output bit segments passed by the check; if the CRC bit segment is a check bit segment generated by the output bit segments of the plurality of code blocks, the communication device 11 performs the output bit segments in the code blocks according to the CRC bit segments.
- the communication device 11 checks the output bit segment and the padding bit segment in the code blocks according to the CRC bit segment, and if the check passes, merges the output bit segments with other correctly verified output bit segments. .
- the communication device 10 may further include an encoding unit 103, which may also be referred to as an encoder or an encoding circuit or the like, and is mainly used to encode each code block output by the processing unit 102, for example, C code blocks in the above embodiment. Perform LDPC coding separately.
- an encoding unit 103 which may also be referred to as an encoder or an encoding circuit or the like, and is mainly used to encode each code block output by the processing unit 102, for example, C code blocks in the above embodiment. Perform LDPC coding separately.
- the communication device 10 may also include a transceiver unit 104, which may also be referred to as a transceiver, transceiver, or transceiver circuit or the like.
- the transceiver unit 104 is mainly used for transmitting and receiving radio frequency signals, for example, for transmitting the coded code block coded by the coding unit 103 to the communication device 11.
- the communication device 10 may also include other units, such as a unit for generating a transport block CRC, a rate matching unit, an interleaving unit, a modulating unit, etc., which may be used to implement respective partial functions of the communication device 10 of FIG. 1, respectively.
- the processing unit 112 is configured to obtain an output sequence according to the C code blocks acquired by the obtaining unit 111, where each code block includes one output bit segment in the output sequence, and at least one code block includes a cyclic redundancy check CRC of length L. a bit segment, or a padding bit segment; wherein B, Z, C are integers greater than 0, and L is an integer greater than or equal to 0 and less than Z.
- the communication device 11 may further include a decoding unit 113, which may also be referred to as a decoder or a decoding circuit or the like, and is mainly used for decoding each coded code block received by the transceiver unit 114;
- a decoding unit 113 which may also be referred to as a decoder or a decoding circuit or the like, and is mainly used for decoding each coded code block received by the transceiver unit 114;
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Abstract
Description
Claims (37)
- 一种通信系统中信息处理的方法,其特征在于,包括:获取输入序列,所述输入序列长度为B;根据所述输入序列以及最大码块长Z得到C个码块,其中,若B>Z,每个所述码块分别包括所述输入序列的一个输入比特段和对应于该输入比特段的长度为L的循环冗余校验CRC比特段;其中,B,Z,C,L均为大于0的整数。
- 根据权利要求2所述的方法,其特征在于,若(B+C·L)%C=0,其中,%为取模运算,所述C个码块中每个码块都包括长度为K 3的分段。
- 根据权利要求2至4任一项所述的方法,其特征在于,所述包括长度为K 3的分段的码块还包括长度为F 3的填充比特段,其中,F 3=I 3-K 3,所述I 3为码块长集合中大于或者等于K 3的最小码块长。
- 根据权利要求2至4任一项所述的方法,其特征在于,所述包括长度为K 3的分段的码块还包括长度为F 3的填充比特段,其中,F 3=I 3-K 3,所述I 3为低密度奇偶校验LDPC基矩阵中信息比特对应的列数与扩展因子z的乘积,且满足I 3大于或者等于K 3,所述扩展因子z为使得所述I 3满足I 3≥K 3的最小扩展因子。
- 根据权利要求5至7任一项所述的方法,其特征在于,所述包括长度为K 3的分段的码块中,所述长度为F 3的填充比特段在所述CRC比特段之后。
- 根据权利要求9所述的方法,其特征在于,所述包括长度为K 4的分段的码块还包括长度为F 4的填充比特段,其中,F 4=I 4-K 4,I 4为码块长集合中大于或者等于所述K 4的最小码块长。
- 根据权利要求9所述的方法,其特征在于,所述包括长度为K 4的分段的码块还包括长度为F 4的填充比特段,其中,F 4=I 4-K 4,所述I 4为低密度奇偶校验LDPC基矩阵中信息比特对应的列数与扩展因子z的乘积,所述扩展因子z为使得所述I 4满足I 4≥K 4的最小扩展因子。
- 根据权利要求1至12任一项所述的方法,其特征在于,任一所述码块长满足低密度奇偶校验LDPC基矩阵中信息比特对应的列数和扩展因子z的乘积。
- 根据权利要求1至13任一项所述的方法,其特征在于L=24。
- 根据权利要求1至14任一项所述的方法,其特征在于,若B≤Z,则,C=1。
- 根据权利要求1至15任一项所述的方法,其特征在于,若B≤Z,则,C=1,L=0。
- 一种通信设备,所述通信设备包括:获取单元,用于获取输入序列,所述输入序列长度为B;处理单元,用于根据根据所述输入序列以及最大码块长Z得到C个码块,其中,若B>Z,每个所述码块分别包括所述输入序列中的一个输入比特段和对应于该输入比特段的长度为L的的循环冗余校验CRC比特段;其中,B,Z,C,L均为大于0的整数。
- 根据权利要求18所述的通信设备,其特征在于,若(B+C·L)%C=0,其中,%为取模运算,所述C个码块中每个码块都包括长度为K 3的分段。
- 根据权利要求18至20任一项所述的通信设备,其特征在于,所述包括长度为K 3的分段的码块还包括长度为F 3的填充比特段,其中,F 3=I 3-K 3,所述I 3为码块长集合中大于或者等于K 3的最小码块长。
- 根据权利要求18至20任一项所述的通信设备,其特征在于,所述包括长度为K 3的分段的码块还包括长度为F 3的填充比特段,其中,F 3=I 3-K 3,所述I 3为低密度奇偶校验LDPC基矩阵中信息比特对应的列数与扩展因子z的乘积,且满足I 3大于或者等于K 3,所述扩展因子z为使得所述I 3满足I 3≥K 3的最小扩展因子。
- 根据权利要求21至23任一项所述的通信设备,其特征在于,所述包括长度为K 3的分段的码块中,所述长度为F 3的填充比特段在所述CRC比特段之后。
- 根据权利要求25所述的通信设备,其特征在于,若(B+C·L)%C=0,其中,%为取模运算,所述C个码块中每个码块都包括长度为K 4的分段。
- 根据权利要求25或26所述的通信设备,其特征在于,所述包括长度为K 4的分段的码块还包括长度为F 4的填充比特段,其中,F 4=I 4-K 4,I 4为码块长集合中大于或者等于所述K 4的最小码块长。
- 根据权利要求25或26所述的通信设备,其特征在于,所述包括长度为K 4的分段的码块还包括长度为F 4的填充比特段,其中,F 4=I 4-K 4,所述I 4为低密度奇偶校验LDPC基矩阵中信息比特对应的列数与扩展因子z的乘积,所述扩展因子z为使得所述I 4满足I 4≥K 4的最小扩展因子。
- 根据权利要求17至29任一项所述的通信设备,其特征在于,任一所述码块长满足低密度奇偶校验LDPC基矩阵中信息比特对应的列数和扩展因子z的乘积。
- 根据权利要求17至30任一项所述的方法,其特征在于L=24。
- 根据权利要求17至31任一项所述的方法,其特征在于,若B≤Z,则,C=1。
- 根据权利要求17至32任一项所述的方法,其特征在于,若B≤Z,则,C=1,L=0。
- 一种通信设备,其特征在于,所述通信设备包括至少一个处理器和至少一个与所述至少一个处理器耦合的存储器,所述处理器用于执行如权利要求1至16任一项所述的方法。
- 一种计算机可读存储介质,包括指令,当其在计算机上运行时,使得计算机执行如权利要求1至16任一项所述的方法。
- 一种计算机程序产品,当其在计算机上运行时,使得计算机执行如权利要求1至16任一项所述的方法。
- 一种通信系统,包括第一通信设备和第二通信设备,其中所述第一通信设备用于将信息序列作为输入序列执行如权利要求1至16任一项所述的方法,所述第一通信设备还用于对所述C个码块进行信道编码,速率匹配,交织,调制中的至少一个操作,以生成输出信号,并发送给所述第二通信设备;所述第二通信设备用于接收来自所述第一通信设备的包括所述输出信号的信号,并进行解调,解交织,解速率匹配,译码中的至少一个操作,以获得所述信息序列。
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| US20200220657A1 (en) | 2020-07-09 |
| BR112019013900A2 (pt) | 2020-02-04 |
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