Ring network data communication architecture based on optical fiber vehicle-mounted Ethernet

Abstract

The invention provides a ring network data communication architecture based on an optical fiber vehicle-mounted Ethernet, and the architecture comprises an electronic control unit and a plurality of sensors; the electronic control unit and the plurality of sensors are sequentially connected end to end through an optical fiber vehicle-mounted Ethernet bus to form a ring network; the data sent by the electronic control unit is transmitted, forwarded and converged to the electronic control unit one by one in a one-way mode through the sensors of the ring network to achieve input and output of the data, and transmission data of the sensors in the ring network nodes are concentrated in data frames. Compared with a traditional communication mode for transmission, the electronic control unit in the invention can realize data communication circulation in the ring network node only through one-time receiving and transmitting, a high transmission rate of 1-10G / s can be obtained, and the communication efficiency of the network node is improved at the same time.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a ring network data communication architecture of an optical fiber vehicle Ethernet. Background technique [0002] With the development of cars in the direction of intelligence, safety and personalization, automatic driving, unmanned driving, and assisted driving make intelligent cars install more sensors than traditional cars, such as Tesla's automatic driving system , which deploys at least 8 vehicle-mounted Ethernet cameras, at least 10 radar sensors (millimeter wave radar, ultrasonic radar), etc. on the vehicle body. At present, the automotive network architecture is still a distributed network architecture. After the sensors are connected to the switch through the bus (CAN bus, LIN bus, LVDS bus, MOST bus), the signal is transmitted to the ECU through the switch. like figure 1 The vehicle Ethernet camera shown is connected to the ECU through the LVDS bus, and the image collected...

AI Technical Summary

Problems solved by technology

Obviously, traditional buses such as CAN bus, LIN bus, LVDS bus, and MOST bus do not meet this requirement. Therefore, in order to solve the problems in the prior art, it is necessary to provide a wire harness cost reduction, low delay, and high transmission bandwidth. The car network architecture to solve the current technical problems

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