Vehicle Diagnostic Protocol Search Across Mixed ECU Networks
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Solution Overview
Problem
The increasing number and diversification of electronic control modules in vehicles pose challenges for diagnostic communication, including network traffic issues and vulnerability to external attacks, necessitating a more efficient and stable diagnostic protocol.
Innovation Solution
A method and apparatus for diagnostic communication that includes a diagnostic server search procedure based on a first protocol, with protocol support information being transmitted after satisfying predetermined conditions, allowing for flexible and secure communication across multiple protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single diagnostic protocol is used for all electronic control modules, then the diagnostic system is simple to implement, but it encounters network traffic problems and difficulty in blocking external attacks
Solution Approach 1:
The patent implements a diagnostic system that supports multiple protocols (DoIP, CAN, LIN) within a single diagnostic device. The system can dynamically select and switch between different protocols based on the target electronic control module, making the diagnostic device universal and capable of handling diverse communication requirements while maintaining system reliability
Solution Approach 2:
The diagnostic system employs dynamic protocol selection and switching capabilities. The system can adaptively choose the appropriate protocol for each diagnostic session based on the target module's supported protocols, and can switch protocols during diagnostic operations to optimize communication efficiency and security
2Reliability
If multiple protocols are supported for diagnosing electronic control modules, then network traffic problems are resolved and security is improved, but the diagnostic system becomes more complex
Solution Approach 1:
The patent introduces a gateway component as an intermediary between the diagnostic device and electronic control modules. The gateway manages protocol conversion and coordination, handling the complexity of multiple protocols while presenting a simplified interface to the diagnostic device, thus improving reliability without significantly increasing the complexity perceived by the user
Solution Approach 2:
The diagnostic system is segmented into distinct functional components: protocol handling modules for different protocols (DoIP, CAN, LIN), a protocol selection module, and a gateway. This segmentation allows each component to be independently managed and optimized, reducing overall system complexity while supporting multiple protocols
3Productivity
If protocol support information is transmitted during diagnostic server search, then compatible electronic control modules can be identified efficiently, but additional communication overhead is introduced
Solution Approach 1:
The patent incorporates protocol support information transmission during the initial diagnostic server search phase. By including this information upfront in the search response, the system enables the diagnostic device to efficiently identify compatible electronic control modules before initiating actual diagnostic operations, avoiding unnecessary communication overhead during the diagnostic process
Data Source
AI summary
A method for diagnostic communication in a vehicle includes performing a diagnostic server search procedure based on a first protocol when a predetermined diagnostic server search condition is satisfied by one of a plurality of communication nodes in the vehicle. The method also includes including, in a message, protocol support information corresponding to whether a plurality of protocols including the first protocol can be supported, according to the diagnostic server search procedure, by the one of a plurality of communication nodes. The method further includes transmitting the message.