Data transmission method, related apparatus, and device

A data transmission method, comprising:

• obtaining, by a transmit end device, a plurality of pieces of original packet data in a transmission sequence;
• encapsulating, by the transmit end device, the plurality of pieces of original packet data in the transmission sequence, to obtain a plurality of pieces of encapsulated original packet data, wherein each piece of encapsulated original packet data comprises packet data and a packet sequence number that indicates a rank of corresponding encapsulated original packet data in the plurality of pieces of encapsulated original packet data, and a rank of each piece of encapsulated original packet data in the plurality of pieces of encapsulated original packet data is consistent with that in the transmission sequence;
• replicating, by the transmit end device, the plurality of pieces of original packet data, to obtain a plurality of pieces of replicated packet data;
• encapsulating the plurality of pieces of replicated packet data, to obtain a plurality of pieces of encapsulated replicated packet data;
• sending, by the transmit end device, the plurality of pieces of encapsulated original packet data to a receive end device in the transmission sequence through an original communication link in N communication links, wherein N is greater than or equal to 2;
• and
• sending, by the transmit end device, the plurality of pieces of encapsulated replicated packet data to the receive end device in the transmission sequence through an (N−1)th communication links, different from the original communication link, in the N communication links.

A receive end device, comprising:

• a processor;
• and
• a memory coupled to the processor and storing instructions, which when executed by the processor, cause the receive end device to:
• receive, through an original communication link in N communication links, a plurality of pieces of encapsulated original packet data sent by a transmit end device, wherein the plurality of pieces of encapsulated original packet data are obtained by encapsulating packet data in a plurality of pieces of original packet data in a transmission sequence, each piece of encapsulated original packet data comprises packet data and a packet sequence number that indicates a rank of corresponding encapsulated original packet data in the plurality of pieces of encapsulated original packet data, a rank of each piece of encapsulated original packet data in the plurality of pieces of encapsulated original packet data is consistent with that in the transmission sequence, and N is greater than or equal to 2;
• receive, through an (N−1)th communication link, different from the original communication link, in the N communication links, a plurality of pieces of encapsulated replicated packet data sent by the transmit end device, wherein the plurality of pieces of encapsulated replicated packet data are obtained by encapsulating a plurality of pieces of replicated packet data, and the plurality of pieces of replicated packet data are obtained by replicating packet data in the plurality of pieces of original packet data;
• perform unpacking processing on the plurality of pieces of encapsulated original packet data, and on the plurality of pieces of encapsulated replicated packet data, to obtain the plurality of pieces of original packet data and packet sequence numbers of the plurality of pieces of original packet data;
• determine the transmission sequence based on the packet sequence numbers of the plurality of pieces of original packet data;
• and
• send the plurality of pieces of original packet data in the transmission sequence.