CN-122001519-A - Communication method, communication device and communication system

Abstract

The application relates to the technical field of communication and discloses a communication method, a communication device and a communication system. Based on the method, the operation of sub-block interleaving is added to the coded bit sequence, so that the bit sequence for determining the symbols of the modulation constellation points is positioned before the bit sequence related to probability shaping after the sub-block interleaving, and further, the bit sequence for determining the symbols of the modulation constellation points is not easy to select for retransmission when the retransmission is carried out, and the performance of the retransmission is guaranteed.

Inventors

• WANG XIANBIN
• ZHANG HUAZI
• TONG JIAJIE
• QIN KANGJIAN
• LIU KE
• LI YUAN
• WANG JUN

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20241101

Claims (20)

1. 1. A method of communication, comprising: The method comprises the steps of carrying out sub-block interleaving on a coded bit sequence to obtain a sub-block interleaved bit sequence, wherein the sub-block interleaved bit sequence comprises a plurality of sub-blocks, the plurality of sub-blocks comprise a first sub-block and at least one second sub-block, the first sub-block comprises a bit sequence for determining symbols of modulation constellation points, the at least one second sub-block is a bit sequence related to probability forming, and the first sub-block is positioned in front of the at least one second sub-block; Determining a bit sequence to be modulated according to the bit sequence after the subblock interleaving; Modulating the bit sequence to be modulated to obtain a modulation symbol sequence; And transmitting the modulation symbol sequence.
2. 2. The method of claim 1, wherein the encoded bit sequence does not include information bits corresponding to shortened bits.
3. 3. A method according to claim 1 or 2, wherein the coded bit sequence does not comprise information bits corresponding to columns in the check matrix having columns greater than a column weight threshold.
4. 4. A method as claimed in any one of claims 1 to 3, wherein the plurality of sub-blocks are the same size and are related to modulation order and primary transmission length.
5. 5. The method according to any one of claims 1 to 4, wherein said determining a bit sequence to be modulated from said sub-block interleaved bit sequence comprises: and acquiring the bit sequence to be modulated from the bit sequence after the sub-block interleaving according to a redundancy version starting point, wherein the redundancy version starting point is used for indicating the starting position of the bit sequence to be modulated.
6. 6. The method of claim 5, wherein the redundancy version starting point is related to whether a probability shaping function is turned on.
7. 7. The method according to claim 5 or 6, wherein the redundancy version starting point is related to the primary transmission length and/or the modulation order.
8. 8. The method of any of claims 1 to 7, wherein the plurality of sub-blocks further comprises at least one third sub-block, the at least one third sub-block being a check bit sequence, the at least one third sub-block being located after the at least one second sub-block.
9. 9. The method of any of claims 1-7, wherein the plurality of sub-blocks further comprises at least one fourth sub-block, the at least one fourth sub-block being part of bits in a check bit sequence, the first sub-block further comprising another part of bits in the check bit sequence, the at least one fourth sub-block being located after the at least one second sub-block.
10. 10. The method according to any one of claims 1 to 9, wherein the probability-shaped related bit sequence is a probability-shaped bit sequence, or The bit sequence related to probability shaping consists of a bit sequence after probability shaping and a bit sequence for assisting probability shaping.
11. 11. A method of communication, comprising: Receiving a modulation symbol sequence, wherein the modulation symbol sequence is determined according to a bit sequence to be modulated, the bit sequence to be modulated is determined according to a bit sequence after sub-block interleaving, the bit sequence after sub-block interleaving is obtained by sub-block interleaving of the bit sequence after encoding, the bit sequence after sub-block interleaving comprises a plurality of sub-blocks, the plurality of sub-blocks comprises a first sub-block and at least one second sub-block, the first sub-block comprises a bit sequence for determining symbols of modulation constellation points, the at least one second sub-block is a bit sequence related to probability shaping, and the first sub-block is positioned before the at least one second sub-block; demodulating the modulation symbol sequence to obtain a demodulated symbol sequence; and decoding the demodulated symbol sequence to recover the original information bit sequence.
12. 12. The method of claim 11, wherein the encoded bit sequence does not include information bits corresponding to shortened bits.
13. 13. The method of claim 11 or 12, wherein the coded bit sequence does not include information bits corresponding to columns in the check matrix having columns greater than a column weight threshold.
14. 14. The method of any of claims 11 to 13, wherein the plurality of sub-blocks are the same size and are related to modulation order and primary transmission length.
15. 15. The method according to any of claims 11 to 14, wherein the bit sequence to be modulated is determined from a redundancy version starting point and a sub-block interleaved bit sequence, the redundancy version starting point being used to indicate a starting position of the bit sequence to be modulated.
16. 16. The method of claim 15, wherein the redundancy version starting point is related to whether a probability shaping function is turned on.
17. 17. The method according to claim 15 or 16, wherein the redundancy version starting point is related to the primary transmission length and/or the modulation order.
18. 18. The method of any of claims 11 to 17, wherein the plurality of sub-blocks further comprises at least one third sub-block, the at least one third sub-block being a check bit sequence, the at least one third sub-block being located after the at least one second sub-block.
19. 19. The method of any of claims 11 to 17, wherein the plurality of sub-blocks further comprises at least one fourth sub-block, the at least one fourth sub-block being part of bits in a check bit sequence, the first sub-block further comprising another part of bits in the check bit sequence, the at least one fourth sub-block being located after the at least one second sub-block.
20. 20. The method according to any one of claims 11 to 19, wherein the probability-shaped related bit sequence is a probability-shaped bit sequence, or The bit sequence related to probability shaping consists of a bit sequence after probability shaping and a bit sequence for assisting probability shaping.

Description

Communication method, communication device and communication system Technical Field The present application relates to the field of communications technologies, and in particular, to a communications method, a communications device, and a communications system. Background The polarization (polar) code is selected as the control channel coding mode in the fifth generation (5th generation,5G) communication standard, and the polarization code is the first coding scheme which can be strictly proved to "reach" shannon channel capacity, and has the advantages of good decoding performance and low complexity. The low-density parity check (LDPC) code is selected as a data channel coding mode in the 5G communication standard, and the LDPC code is a linear block code with a sparse check matrix, not only has good performance approaching Shannon limit, but also has lower decoding complexity and flexible structure. As described above, the polarization code and the LDPC code are two coding schemes of 5G. Based on the combination of the polarization code and the LDPC code, a probability-shaped transmission scheme can be realized. For example, probability shaping is achieved using polar codes, and channel coding is achieved using LDPC codes. After probability shaping is introduced, when retransmission is needed, how to guarantee the retransmission performance is needed to be solved. Disclosure of Invention The application provides a communication method, a communication device and a communication system, which are used for guaranteeing retransmission performance after probability shaping is introduced. In a first aspect, an embodiment of the present application provides a communication method, which may be performed by a first communication apparatus, where the "first communication apparatus" in the present application may refer to a communication device (for example, a network device, a terminal device, an encoding device, etc.), a component in the communication device (for example, a processor, a chip, or a chip system, etc.), or a logic module or software that can implement all or part of the functions of the communication device, where the description is not specific. The method comprises the steps of conducting sub-block interleaving on an encoded bit sequence to obtain a bit sequence after sub-block interleaving, wherein the bit sequence after sub-block interleaving comprises a plurality of sub-blocks, the sub-blocks comprise a first sub-block and at least one second sub-block, the first sub-block comprises a bit sequence used for determining symbols of modulation constellation points, the at least one second sub-block is a bit sequence related to probability forming, the first sub-block is located in front of the at least one second sub-block, the bit sequence to be modulated is determined according to the bit sequence after sub-block interleaving, the bit sequence to be modulated is modulated to obtain a modulation symbol sequence, and the modulation symbol sequence is sent. Based on the scheme, the operation of sub-block interleaving is added to the coded bit sequence, so that after the sub-block interleaving, the bit sequence of the symbol for determining the modulation constellation point is positioned before the bit sequence related to probability shaping, and further, the bit sequence of the symbol for determining the modulation constellation point is less easy to select for retransmission when retransmission is performed. Since the reliability of the bit sequence used to determine the symbols of the modulation constellation point is higher than the reliability of the probability shaping related bit sequence, choosing not to retransmit the bit sequence used to determine the symbols of the modulation constellation point has a larger gain than choosing not to retransmit the probability shaping related bit sequence, since a bit sequence with high reliability is more likely to be transmitted successfully and thus less need to be retransmitted. Therefore, the scheme reduces the probability of retransmitting the bit sequence of the symbol for determining the modulation constellation point with high reliability by increasing the operation of sub-block interleaving, and is beneficial to guaranteeing the retransmission performance. In a possible implementation method, the coded bit sequence does not include information bits corresponding to shortening bits. Based on the scheme, the realization complexity of sub-block interleaving is simplified. In a possible implementation, the coded bit sequence does not include information bits corresponding to columns in the check matrix having columns greater than a column weight threshold. Based on the scheme, the transmission performance is improved. In one possible implementation, the multiple sub-blocks are the same size and are related to modulation order and primary transmission length. Based on the scheme, probability shaping of the modulation symbols is facilitated, the send