Hybrid-network-gateway network management device combining CAN with Ethernet network and exchange method thereof

Abstract

The invention discloses a hybrid network gateway combining a CAN with an Ethernet network in a body and a data exchange method thereof. The hybrid network gateway comprises a CAN message transmitting and receiving module, an Ethernet message transmitting and receiving module, a signal processing conversion module and a logic main control module, wherein the CAN message transmitting and receiving module is used for carrying out communication with equipment on a CAN bus on a vehicle; the Ethernet message transmitting and receiving module is used for carrying out communication with equipment on the Ethernet and comprises an upper computer and novel Ethernet vehicle-mounted equipment; the signal processing conversion module is used for parsing, packaging and forwarding a CAN message and an Ethernet message and enabling the CAN message and the Ethernet message to accord with a requested protocol and is compatible to the universal Ethernet; and the logic main control module is used for determining a message distribution direction, responding to instructions, such as related diagnosis and like, which are sent by an Ethernet diagnosis port, and controlling onboard peripheral equipment to acquire data information. One gateway can simultaneously communicate with multiple paths of CAN networks. The hybrid network gateway uses a vehicle-mounted twisted-pair as an Ethernet communication bus, and compared with conventional RJ45, has the advantages of low cost, interference resistance and the like. A refresh instruction (such as a 3E maintaining instruction) on the vehicle-mounted equipment is subjected to special processing, so that both the vehicle-mounted CAN equipment and the gateway can be efficiently refreshed by the Ethernet.

Description

technical field [0001] The invention relates to the field of communication protocols, in particular to the vehicle-mounted CAN bus protocol, TCP / IP protocol stack TCP, and UDP communication. Background technique [0002] In the current vehicle network, the more common one is the CAN bus network. But the speed is slow, the theoretical communication speed is only one percent of the Ethernet communication rate. With the rise of the Internet of Things and assisted driving, the number of in-vehicle sensors has increased significantly. The electronic control system of the vehicle is becoming more and more complex. More and more electronic control systems on the vehicle use the ECU refresh method to update software, calibration, etc., and the total amount of refreshed data increases; The requirements for user experience and user experience are getting higher and higher, and the application data volume of car navigation, entertainment and other systems is also becoming larger and ...

AI Technical Summary

Problems solved by technology

At the same time, the traditional Ethernet bus RJ45 has high cost and large cross-section, which is not suitable for vehicle bus

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