Data transmission method and communication apparatus

An apparatus, comprising:

• one or more processors;
• and
• a memory having instructions stored thereon that, when executed by the one or more processors, cause the apparatus to perform operations comprising:
• performing network coding based on a first data segment, to obtain a first network coded data segment;
• generating first cyclic redundancy check (CRC) information and a first data unit based on the first network coded data segment, wherein the first data unit comprises a network coding parameter and the first CRC information, the network coding parameter corresponds to the first network coded data segment, and the first CRC information is error check information for the first network coded data segment, wherein the network coding parameter comprises coefficient indication information corresponding to the first network coded data segment, and the coefficient indication information comprises a coding coefficient vector corresponding to the first network coded data segment, or index information that indicates a corresponding coding coefficient vector;
• and
• outputting the first data unit,
• wherein the first data unit is a protocol data unit (PDU), and the PDU comprises a protocol header part, at least one network coded data part, at least one subheader part, and at least one check bit part;
• the protocol header part comprises quantity indication information, and the quantity indication information indicates a quantity of first network coded data segments comprised in the PDU;
• and
• one of the at least one network coded data part comprises one first network coded data segment, one of the at least one subheader part comprises a network coding parameter corresponding to the one first network coded data segment, and one of the at least one check bit part comprises one piece of the first CRC information.

A non-transitory computer readable medium storing instructions that, when executed by one or more processors, causes the one or more processors to perform operations comprising:

• performing network coding based on a first data segment, to obtain a first network coded data segment;
• generating first cyclic redundancy check (CRC) information and a first data unit based on the first network coded data segment, wherein the first data unit comprises a network coding parameter and the first CRC information, the network coding parameter corresponds to the first network coded data segment, and the first CRC information is error check information for the first network coded data segment, wherein the network coding parameter comprises coefficient indication information corresponding to the first network coded data segment, and the coefficient indication information comprises a coding coefficient vector corresponding to the first network coded data segment, or index information that indicates a corresponding coding coefficient vector;
• and
• outputting the first data unit,
• wherein the first data unit is a protocol data unit (PDU), and the PDU comprises a protocol header part, at least one network coded data part, at least one subheader part, and at least one check bit part;
• the protocol header part comprises quantity indication information, and the quantity indication information indicates a quantity of first network coded data segments comprised in the PDU;
• and
• one of the at least one network coded data part comprises one first network coded data segment, one of the at least one subheader part comprises a network coding parameter corresponding to the first network coded data segment, and one of the at least one check bit part comprises one piece of the first CRC information.