Automotive Ethernet Gateway for CAN LIN FlexRay Data Conversion
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Solution Overview
Problem
Current vehicle bus protocols, such as CAN, LIN, and FlexRay, have limited data transmission bandwidth and are unable to communicate with each other, failing to meet the demands of vehicle-to-vehicle and vehicle-to-road facility communication.
Innovation Solution
Implementing a data transmission method that converts data formats from CAN, LIN, and FlexRay to Ethernet, utilizing a signal convert module to transmit data over a vehicle Ethernet backbone, enhancing bandwidth and reducing latency, while ensuring secure and fast data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional bus protocols (CAN, LIN, FlexRay) are used for data transmission, then device compatibility and existing infrastructure are maintained, but data transmission bandwidth is limited and cannot satisfy vehicle-to-vehicle and vehicle-to-road facility communication demands
Solution Approach 1:
The patent implements a gateway device that can handle multiple bus protocols (CAN, LIN, FlexRay) and Ethernet simultaneously, enabling a single system to perform multiple communication functions. This allows the vehicle network to support both traditional low-bandwidth protocols and high-bandwidth Ethernet for different communication needs, thereby increasing overall adaptability and data transmission capacity without abandoning existing infrastructure.
Solution Approach 2:
The gateway device acts as an intermediary between traditional bus protocols and Ethernet network, translating and routing data between these different communication systems. This mediator enables high-bandwidth Ethernet communication for vehicle-to-vehicle and vehicle-to-road facility applications while maintaining compatibility with existing CAN, LIN, and FlexRay systems, thus resolving the bandwidth limitation without complete system replacement.
2Adaptability or versatility
If multiple bus protocols (CAN, LIN, FlexRay) are used in parallel, then communication versatility is maintained, but system complexity increases and protocols cannot communicate with each other
Solution Approach 1:
The patent merges multiple bus protocol interfaces and Ethernet interfaces into a single gateway device that provides unified protocol conversion and data routing capabilities. By combining these functions in one centralized unit, the system reduces the complexity that would arise from having separate communication systems while maintaining the ability to handle multiple protocols simultaneously through integrated processing.
Solution Approach 2:
The gateway device is designed with universal functionality to handle CAN, LIN, FlexRay, and Ethernet protocols within a single system architecture. This multi-functional design enables different protocols to communicate with each other through the gateway's translation capabilities, maintaining protocol compatibility while avoiding the complexity of implementing separate dedicated systems for each protocol.
3Speed
If data format conversion from CAN, LIN, FlexRay to Ethernet is implemented, then transmission speed and bandwidth are improved, but conversion complexity is introduced
Solution Approach 1:
The gateway device automatically performs data format conversion from various bus protocols to Ethernet without requiring manual intervention or complex external conversion systems. The device self-manages the protocol translation, data routing, and format adaptation processes, reducing the operational complexity despite the technical complexity of the conversion functions themselves.
Data Source
AI summary
A data transmission method for transmitting different data with different data format based on vehicle Ethernet includes: receiving a first data sent by a zone device of a vehicle, the zone device comprising a CAN transceiver, a LIN transceiver, or a FlexRay transceiver, detecting an original data format of the first data, determining a first predetermined conversion algorithm matched with the original data format of the first data, and converting the original data format of the first data to an Ethernet data format according to the first predetermined conversion algorithm, and transmitting the first data with the Ethernet data format to a CCU of the vehicle. A data transmission device and a vehicle device are also disclosed.