Data Transmission Method and Apparatus

A data transmission method, comprising:

• receiving, by a second electronic control unit (ECU) of a vehicle, an encapsulated packet sent by a first ECU of the vehicle;
• obtaining, by the second ECU, a protection policy corresponding to the encapsulated packet, wherein the protection policy corresponding to the encapsulated packet comprises an encapsulation manner used by the first ECU to obtain the encapsulated packet;
• and
• parsing, by the second ECU, the encapsulated packet according to the protection policy, to obtain a parsing result.

A first electronic control unit (ECU), applied to a vehicle, wherein the vehicle comprises the first ECU and a second ECU, and the first ECU comprises a memory and a processor, wherein the memory is configured to store program instructions, and the processor is configured to execute program instructions to:

• obtain to-be-sent data;
• determine a protection policy corresponding to the to-be-sent data from a plurality of protection policies, wherein the plurality of protection policies comprise a plurality of different encapsulation manners for the to-be-sent data, and the plurality of protection policies comprise at least two protection policies with different calculation amounts for processing the to-be-sent data;
• encapsulate the to-be-sent data according to the protection policy corresponding to the to-be-sent data, to obtain an encapsulated packet;
• and
• send the encapsulated packet to the second ECU.

A second electronic control unit (ECU), applied to a vehicle, wherein the vehicle comprises a first ECU and the second ECU, and the second ECU comprises a memory and a processor, wherein the memory is configured to store program instructions, and the processor is configured to execute program instructions to:

• receive an encapsulated packet sent by the first ECU;
• obtain a protection policy corresponding to the encapsulated packet, wherein the protection policy corresponding to the encapsulated packet comprises an encapsulation manner used by the first ECU to obtain the encapsulated packet;
• and
• parse the encapsulated packet according to the protection policy, to obtain a parsing result.

A vehicle, wherein the vehicle comprises a first electronic control unit (ECU) and a second ECU, wherein the first ECU is configured to:

• obtain to-be-sent data;
• determine a protection policy corresponding to the to-be-sent data from a plurality of protection policies, wherein the plurality of protection policies comprise a plurality of different encapsulation manners for the to-be-sent data, and the plurality of protection policies comprise at least two protection policies with different calculation amounts for processing the to-be-sent data;
• encapsulate the to-be-sent data according to the protection policy corresponding to the to-be-sent data, to obtain an encapsulated packet;
• and
• send the encapsulated packet to the second ECU.