Data transmission and reception method in vehicle network, and apparatus for the same

An operation method of a first communication node in an Ethernet-based vehicle network, comprising:

• receiving, by a controller, a frame n from a second communication node, the frame n including a data unit n, and a first indicator indicating that a size of a data unit n+1 to be transmitted via a frame n+1 after determining that the frame n is different from a size of the data unit n;
• determining, by the controller, that the transmission rate of the data unit n+1 is different from a transmission rate of the data unit n, based on the first indicator included in the frame n;
• identifying, by the controller, one or more quiet time durations (QTDs) existing in the frame n+1;
• and
• obtaining, by the controller, the data unit n+1 from a duration excluding the one or more QTDs in the frame n+1,
• wherein n is a natural number.

A first communication node constituting an Ethernet-based vehicle network, comprising a processor and a memory storing at least one instruction executable by the processor, wherein the processor is configured to:

• generate, by the processor, a frame n including a data unit n, and a first indicator indicating that a size of a data unit n+1 to be transmitted via a frame n+1 after determining that the frame n is different from a size of the data unit n;
• transmit, by the processor, the frame n to a second communication node;
• generate, by the processor, the frame n+1 including the data unit n+1;
• and
• transmit, by the processor, the frame n+1 to the second communication node,
• wherein a transmission rate of the data unit n is different from the transmission rate of the data unit n+1, and n is a natural number.