Patent ID: 9705699
Date: 2017-07-11
CPC Classifications: H04L

Claim:
1. A method for reducing communication load in a transmission node connected to a controller area network (CAN) communication network, the method comprising steps of: generating a first CAN data frame including first data and transmitting the first CAN data frame to the CAN communication network at a first transmission time; comparing second data with the first data at a second transmission time; transmitting, to the CAN communication network, a second CAN data frame in which a data length code (DLC) field value is set to a predetermined value indicating that the data has not changed, when the second data is identical to the first data; checking a position of a changed byte when 1 byte of the second data differs from the corresponding byte of the first data; and setting a DLC field value corresponding to the checked position, wherein only the changed byte of the second data is inserted into a data field of the second CAN data frame and transmitted.