With the continuous development of automobiles from mechanical products to digital electronic products, the software level has increasingly become the core competitiveness of automobiles. Ten years ago, a car contained only about 10 million lines of software code. Today, a car has about 100 million lines of software code. In the future, the software code volume of self-driving cars will reach 300 million to 500 million lines. The code volume of automotive software is increasing exponentially. Due to the continuous accumulation of codes, the security holes that appear need to be repaired in time. Functional maintenance and complex software upgrades for cars will become more important. Compared with the traditional distributed ECU architecture, domain controllers have scalable computing power, more flexible vehicle OTA, and an increased proportion of software, enabling automakers to provide users with continuously iteratively upgraded functional experiences. In other words, car companies can upgrade car functions by simply updating software algorithms without adding additional ECUs.