Vehicle-mounted network architecture based on gigabit Ethernet bus and communication method thereof

The invention discloses a vehicle-mounted network architecture based on a gigabit Ethernet bus. The architecture comprises a gateway and a plurality of domain controllers, each domain controller is connected with an Ethernet switch of the gateway through an Ethernet bus; the Ethernet switch is used for realizing information interaction among the domain controllers; the gateway is connected with anOBD interface through a CAN bus. The gateway is used for carrying out communication protocol conversion on the diagnosis request from the OBD interface, forwarding the diagnosis request subjected tocommunication protocol conversion to the domain controller appointed by the diagnosis request through the Ethernet switch of the gateway, and forwarding the diagnosis response of the appointed domaincontroller to the diagnosis interface link. A vehicle-mounted gigabit Ethernet bus is used as a backbone network and is connected with each domain controller, so that efficient interaction of signalsamong the domain controllers